(date: 2024-05-03 22:49:20)
date: 2024-05-03, from: NOAA Weather Forecasts
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0401 PM CDT Fri May 03 2024 Valid 051200Z - 111200Z An active period of fire weather concerns remains likely beginning late this weekend and lasting well into the upcoming work week. The greatest fire weather risk will be focused across the central to southern Rockies and into adjacent areas of the central/southern High Plains where a dry air mass is already in place. Latest ensemble guidance continues to show strong agreement in the evolution of an upper-level trough (currently noted in water-vapor imagery over the northeast Pacific) as it translates east across the inter-mountain West and into the Plains Sunday and Monday, reaching the Great Lakes/northern Plains by Tuesday/Wednesday. Strong low to mid-level flow associated with this system will support multiple days of dry, windy conditions with an accompanying fire weather risk. ...D3/Sunday to D6/Wednesday - New Mexico and adjacent portions of TX/CO... Strong divergence aloft ahead of the approaching upper-level wave will support broad surface pressure falls across the central Rockies on Sunday afternoon. In response, southerly winds will increase across much of the Four Corners region into central and eastern NM. Latest mid-range ensemble guidance suggests sustained 20-25 mph winds will be common by late afternoon when RH values should be reaching their diurnal minimums between 10-20%. Although fuels across western NM are not overly dry as of Friday afternoon, dry/windy conditions on Saturday across this region should help cure finer fuels by Sunday. Perhaps the most intense fire weather conditions are anticipated on Monday afternoon across portions of east/northeast NM. The ejection of the surface low into the Plains Monday afternoon will support strong westerly downslope winds off the central/southern Rockies. This will maintain dry conditions across the region with 10-20% RH common. Elevated conditions are expected across a broad swath of the High Plains with critical conditions likely across much of eastern NM. Latest forecast guidance hints that 25-30 mph sustained winds are probable across northeast NM in the lee of the Sangre de Cristo Mountains. While this portion of northeast NM is currently receiving rainfall, such dry/windy conditions should yield dried grasses after a few hours. Persistent zonal flow will linger over the southern Rockies D5/Tuesday into D6/Wednesday. This will maintain a downslope flow regime with an attendant dry air mass (afternoon minimum RH values in the teens) across the southern High Plains with potential both days for elevated to critical fire weather conditions. The critical risk areas have been adjusted in this outlook update to reflect where medium to long-range ensemble guidance shows the strongest signal for sustained 20+ mph winds. These areas will likely be refined in subsequent outlooks as mesoscale details come into focus. Elevated conditions may linger into D7/Thursday across southern NM, but weakening gradient winds aloft should limit fire weather potential compared to previous days. ..Moore.. 05/03/2024 ...Please see www.spc.noaa.gov/fire for graphic product...
https://www.spc.noaa.gov/products/exper/fire_wx/
date: 2024-05-03, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
No watches are valid as of Fri May 3 14:47:02 UTC 2024.
https://www.spc.noaa.gov/products/watch/
date: 2024-05-03, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
No Mesoscale Discussions are in effect as of Fri May 3 14:47:02 UTC 2024.
https://www.spc.noaa.gov/products/md/
date: 2024-05-03, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0752 AM CDT Fri May 03 2024 Valid 031300Z - 041200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS FROM NEAR THE WEST TEXAS CAPROCK ONTO ADJOINING LOW ROLLING PLAINS... ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS SURROUNDING THE ENHANCED AREA...AND OVER PORTIONS OF THE CENTRAL PLAINS... ...SUMMARY... Large hail and damaging gusts are possible over parts of the central/southern Great Plains from southern Nebraska to west Texas, along with some tornado potential over parts of west Texas. ...Synopsis... Today's transitional mid/upper-level synoptic pattern is a tale of two cyclones -- one astride the Upper Midwest/Canadian border, and another digging southeastward out of the Gulf of Alaska. The broad, complex leading cyclone will eject northeastward over MB and northwestern ON through the period. A trailing shortwave trough -- apparent in moisture-channel imagery over parts of southern ID and northern NV -- will move east-northeastward to eastern SD and central NE by 12Z tomorrow. The strong, well-developed Pacific cyclone will proceed southeastward to just off the coast of OR by the end of the period. Southwest flow aloft will be maintained with weak synoptic-scale height rises over most of the central/southern Plains. Still, sufficient moisture, buoyancy, lift and shear are apparent for a couple relative maxima in severe potential as discussed below. At the surface, 11Z analysis showed a low attached to a cold front over south-central WY. The front should proceed southeastward through the day, extending from southeastern SD to western NE an central CO by 00Z, with the low over northeastern CO. By 12Z tomorrow, the front should extend from a low over IA to south- central KS, the northern TX Panhandle, and north-central NM. This front will overtake a developing dryline over the central High Plains from north-south, with the dryline position at 00Z over eastern CO, the western TX Panhandle, and Permian Basin. A weak/ residual, nearly stationary front extended from a low near FST northeastward across northwest TX, eastern OK and the Ozarks, and should continue to lose definition amidst considerable convective outflow. The southern rim of that outflow was evident from southeast TX (between GLS-BPT) across the HOU metro then west- northwestward to near SJT. The western part will shift northward slowly through the day toward the front, which itself should drift northward up the Caprock. ...West/southwest TX... Widely scattered to scattered thunderstorms are expected to form this afternoon near the dryline and the residual outflow boundary over the South Plains to Low Rolling Plains/Concho Valley regions. Isolated to widely scattered convection possible farther south off the dryline past the Rio Grande, and into strongly heated/CINH- minimized higher terrain of the Serranias del Burro range in northern Coahuila. This activity should move eastward across areas below the Caprock and around the Big Country to Edwards Plateau, with potential for some of the Mexican convection to cross the Rio Grande this evening as well. Supercells -- with large to very large hail and at least isolated potential for tornadoes -- will be more probable in and near the 30%/"enhanced" hail area. Dryline and orographic activity to the south will be an early hail/wind threat. Some of this activity may aggregate into clusters offering mainly strong-severe gusts, with one or two small MCSs possible this evening into the early overnight hours. Despite multiple days of MCS and smaller-scale convective activity to the east and southeast, a reservoir of rich low-level moisture remains not far upstream across south-central TX and into the southern Edwards Plateau, where upper 60s to low 70s F surface dewpoints and PW commonly 1-1.5 inches. When advected northwestward amid diurnal heating and beneath steep midlevel lapse rates, 3000-4000 J/kg MLCAPE should become common. Though low-level flow should not be particularly strong, it will be backed, contributing to elongated hodographs ad around 30-40 kt effective-shear magnitudes. Splitting storms may be common early, offering the greatest hail potential (size and coverage). The damaging-wind threat will be maximized on the mesoscale where organized cold pools can develop, and should extend farther east at greater density than the hail potential this evening into tonight. In the absence of substantial large-scale support, tornado potential will be locally maximized with any supercells that can interact favorably with outflow boundaries or each other. ...Central Plains... Large hail and severe gusts are possible from mid/late afternoon into tonight, from thunderstorms shifting eastward across portions of the central Plains. Though nowhere nearly as moist as the TX outlook area, a diurnally destabilized plume of moist advection should support a secondary relative max in severe potential along/ahead of the cold front and dryline from parts of eastern CO to western/northern KS and southern NE. Convection should develop by mid/late afternoon in a regional convergence maximum near and northeast of the surface low, with MLCINH weakened by favorable diurnal heating. Surface dewpoints in the 40s to low 50s F should be common, with steep surface-500-mb lapse rates, 500-1000 J/kg MLCAPE and well-mixed subcloud layers. Effective-shear magnitudes around 40-50 kt indicate potential for organized convection -- both in quasi-linear form near the front and initially discrete (but later merging upscale) off the dryline. Though activity will encounter a more-stable boundary layer with time and eastward extent across KS/NE, at least marginal severe-gust potential may last overnight as far eastward as parts of the Missouri Valley region. ..Edwards/Broyles.. 05/03/2024
https://www.spc.noaa.gov/products/outlook/day1otlk_1300.html
date: 2024-05-02, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
STATUS REPORT ON WW 170 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..SQUITIERI..05/01/24 ATTN...WFO...MAF...SJT... STATUS REPORT FOR WS 170 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS TXC003-033-043-081-103-105-115-135-151-165-173-227-235-317-329- 335-353-371-383-413-415-431-435-443-451-461-020040- TX . TEXAS COUNTIES INCLUDED ARE ANDREWS BORDEN BREWSTER COKE CRANE CROCKETT DAWSON ECTOR FISHER GAINES GLASSCOCK HOWARD IRION MARTIN MIDLAND MITCHELL NOLAN PECOS REAGAN SCHLEICHER SCURRY STERLING SUTTON TERRELL TOM GREEN UPTON THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
https://www.spc.noaa.gov/products/watch/ws0170.html
date: 2024-05-02, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 170 NWS Storm Prediction Center Norman OK 125 PM CDT Wed May 1 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of West Texas * Effective this Wednesday afternoon and evening from 125 PM until 900 PM CDT. * Primary threats include... Scattered large hail and isolated very large hail events to 3 inches in diameter likely Scattered damaging winds likely with isolated significant gusts to 80 mph possible A tornado or two possible SUMMARY...Thunderstorms will intensify this afternoon along the dryline, tracking eastward through the early evening. Very large hail and damaging winds are possible, along with an isolated tornado or two. The severe thunderstorm watch area is approximately along and 60 statute miles east and west of a line from 55 miles north northeast of Big Spring TX to 40 miles southwest of Dryden TX. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU0). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && AVIATION...A few severe thunderstorms with hail surface and aloft to 3 inches. Extreme turbulence and surface wind gusts to 70 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 25030. ...Hart
https://www.spc.noaa.gov/products/watch/ww0170.html
date: 2024-05-02, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
STATUS REPORT ON WW 171 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 0592 ..SQUITIERI..05/01/24 ATTN...WFO...AMA...OUN...LUB... STATUS REPORT FOR WT 171 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS OKC007-057-020040- OK . OKLAHOMA COUNTIES INCLUDED ARE BEAVER HARMON TXC011-045-065-075-087-101-107-125-129-153-155-169-179-189-191- 195-197-211-233-263-269-275-295-303-305-345-357-393-433-437-483- 020040- TX . TEXAS COUNTIES INCLUDED ARE ARMSTRONG BRISCOE CARSON CHILDRESS COLLINGSWORTH COTTLE CROSBY DICKENS DONLEY FLOYD FOARD GARZA GRAY HALE HALL HANSFORD HARDEMAN HEMPHILL HUTCHINSON KENT KING KNOX LIPSCOMB LUBBOCK LYNN MOTLEY OCHILTREE
https://www.spc.noaa.gov/products/watch/ws0171.html
date: 2024-05-02, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 171 NWS Storm Prediction Center Norman OK 325 PM CDT Wed May 1 2024 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Southwest Oklahoma Eastern Texas Panhandle * Effective this Wednesday afternoon and evening from 325 PM until 1100 PM CDT. * Primary threats include... A few tornadoes possible Widespread large hail and isolated very large hail events to 4 inches in diameter likely Scattered damaging winds and isolated significant gusts to 75 mph likely SUMMARY...Widely scattered but intense thunderstorms are expected to affect the watch area through the afternoon and evening. Very large hail, damaging wind gusts, and a few tornadoes will be possible with these storms. The tornado watch area is approximately along and 45 statute miles east and west of a line from 5 miles west northwest of Liberal KS to 105 miles south southwest of Childress TX. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU1). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Watch means conditions are favorable for tornadoes and severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. && OTHER WATCH INFORMATION...CONTINUE...WW 170... AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 4 inches. Extreme turbulence and surface wind gusts to 65 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 24035. ...Hart
https://www.spc.noaa.gov/products/watch/ww0171.html
date: 2024-05-02, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
STATUS FOR WATCH 0172 HAS NOT BEEN ISSUED YET
https://www.spc.noaa.gov/products/watch/ws0172.html
date: 2024-05-02, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
Mesoscale Discussion 0592 NWS Storm Prediction Center Norman OK 0607 PM CDT Wed May 01 2024 Areas affected...Eastern TX Panhandle...Far Northwestern TX...Far Southwestern/Western OK Concerning...Tornado Watch 171... Valid 012307Z - 020030Z The severe weather threat for Tornado Watch 171 continues. SUMMARY...Threat for all severe hazards, including very large hail from 2.5" to 3.5" in diameter, strong gusts up to 75 mph, and tornadoes continues across the eastern TX Panhandle. DISCUSSION...Several supercells are currently ongoing across the eastern TX Panhandle, including a pair of tornadic storms, one over Roberts Ochiltree Counties in the northeast TX Panhandle and the other farther south in Briscoe and Hail Counties. Both of these storms, as well as the other supercells developing southwestward from the Panhandle into the Texas South Plains, are in a favorable environment for persistence. Main factor influencing overall updraft maintenance and storm persistence will be storm mergers/interactions. Some secondary influence from anvil shading and resulting boundary-layer cooling is possible, although this could be offset by continuing low-level moisture advection. The general expectation is for storms to persist, with perhaps one substantial storm eventually emerging out of the cluster over Briscoe and Hall Counties. Given the unimpeded inflow and anticipated strengthening of low-level flow, this storm would likely represent the best candidate for a significant severe weather, including very large hail, strong gusts, and tornadoes, over the next hour or two. Storm motion has been relatively slow thus far, generally 15 to 20 kt, with a few storm moving even slower. As such, this activity will likely remain in the eastern TX Panhandle (i.e. within Tornado Watch 171) for the next few hours. Even so, trends will be monitored for faster storm motion and the potential for activity to move into western OK earlier. ..Mosier.. 05/01/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...OUN...LUB...AMA... LAT...LON 36030139 36650085 36369982 34399974 33330031 33380173 35130151 36030139
https://www.spc.noaa.gov/products/md/md0592.html
date: 2024-05-02, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 172 NWS Storm Prediction Center Norman OK 455 PM CDT Wed May 1 2024 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Western and central Kansas * Effective this Wednesday afternoon from 455 PM until Midnight CDT. * Primary threats include... A couple tornadoes possible Scattered large hail likely with isolated very large hail events to 3.5 inches in diameter possible Scattered damaging wind gusts to 70 mph possible SUMMARY...At least isolated severe storms including supercells are expected to develop through early evening, initially near a surface low and dryline and warm/nearly stationary front across western Kansas. Even if storms remain relatively isolated, they will be capable of very large hail, tornadoes, and very strong wind gusts. The tornado watch area is approximately along and 60 statute miles north and south of a line from 40 miles west of Garden City KS to 55 miles south southeast of Russell KS. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU2). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Watch means conditions are favorable for tornadoes and severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. && OTHER WATCH INFORMATION...CONTINUE...WW 170...WW 171... AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 3.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 24025. ...Guyer
https://www.spc.noaa.gov/products/watch/ww0172.html
date: 2024-05-02, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
Mesoscale Discussion 0593 NWS Storm Prediction Center Norman OK 0658 PM CDT Wed May 01 2024 Areas affected...southwestern Texas Concerning...Severe Thunderstorm Watch 170... Valid 012358Z - 020100Z The severe weather threat for Severe Thunderstorm Watch 170 continues. SUMMARY...Severe threat continues within WW170. Instances of severe hail and damaging wind will continue over the next couple of hours. DISCUSSION...Thunderstorm activity continues in the northern and southern portions of WW170. To the north, clustered cell activity with transient supercell structures will continue to support risk of instances of large hail and damaging wind. Recent reports of hail as large as 1.5 in and gusts 50+ mph have been noted in this region. Further south, storms have made attempts to grow upscale along outflow, which will likely support a shift to increase in threat for damaging wind (possibly as high as 70 mph) threat in the short term, though instances of large hail will be possible. Activity is largely supported dryline forcing and will likely wane in coverage after sunset with the end of daytime heating. The propensity for anvil spread downwind has also likely limited the threat of further development with eastern extent, as witnessed by meager development along a northward moving outflow boundary near Upton and Reagan Counties. ..Thornton/Guyer.. 05/01/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...EWX...SJT...LUB...MAF... LAT...LON 30130285 30890251 32380238 32890232 33020170 32930130 31940128 31340140 30550159 30080179 29820190 29750208 29750239 29880286 30130285
https://www.spc.noaa.gov/products/md/md0593.html
date: 2024-05-01, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0314 PM CDT Wed May 01 2024 Valid 012000Z - 021200Z ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING FROM SOUTH-CENTRAL KANSAS INTO WESTERN OKLAHOMA/WEST TEXAS... ...SUMMARY... The greatest threat today for large to very large hail, severe thunderstorm gusts and a few tornadoes will be in from south-central Kansas into western Oklahoma, the eastern Texas Panhandle and northwest/west-central Texas. ...20Z Update... Severe probabilities have been expanded westward somewhat to account for a farther west position of the dryline this afternoon. Significant wind probabilities have also been added across parts of west/northwest TX, where a mix of supercell clusters and eventual MCS development will be possible. The influence of extensive antecedent convection remains quite evident across parts of KS/OK, with the richest moisture currently confined from far western OK into the eastern TX Panhandle and northwest TX, and pockets of somewhat higher dewpoints from southeast KS into northeast OK, and also across southwestern KS, where somewhat stronger recovery is occurring this afternoon. Confidence remains rather low regarding storm coverage and evolution along the dryline, though at least isolated supercell development will be possible late this afternoon into the evening, with a threat of all severe hazards. Upscale growth into one or more clusters still appears likely across central and possibly north TX tonight, with some potential for an organized MCS to move into southeast TX before the end of the period. An elevated storm cluster and possible MCS is also expected to develop near the KS/NE border later tonight. While this convection will likely remain mostly elevated, rather strong MUCAPE will support at least an isolated threat for both hail and severe gusts. See the previous discussion below for more information, and MCD 589 for more information regarding the short-term threat from southwest KS into the TX Panhandle. . ..Dean.. 05/01/2024 .PREV DISCUSSION... /ISSUED 1125 AM CDT Wed May 01 2024/ ...Southern KS/Western OK/TX Panhandle... Late morning surface analysis shows a low near Guymon OK, with a remnant outflow boundary from overnight storms extending southward through the eastern TX Panhandle and across southern OK. It is unclear whether this boundary will wash out through the afternoon, or be maintained by shower/thunderstorm activity over southwest OK. Regardless, thunderstorms will form rapidly on the dryline from southwest KS into the eastern TX Panhandle late this afternoon and interact with the remnant boundary. Supercells capable of very large hail, damaging winds, and tornadoes are possible along this corridor through the early evening. There is a chance of a strong tornado or two, but confidence in position is not high enough to increase tornado probabilities at this time. ...West TX... Strong heating will occur today west of the dryline over west TX, leading to scattered intense storm development. Initial discrete supercells will pose a risk of very large hail and a few tornadoes, but organized outflows appear likely given latest model guidance, which will promote damaging wind gusts as storms spread eastward through the evening. ...Central TX today and tonight... A very moist low-level air mass is in place today over south-central TX, with dewpoints well into the 70s. Scattered afternoon thunderstorms are expected to form in this environment, where sufficient CAPE and deep-layer shear will promote organized/supercell structures. Given the abundant low-level theta-e and veering low-level wind fields, a tornado or two is possible, along with locally gusty/damaging winds. Tonight, storms that form over west TX may organize into an MCS and track into central TX. A strengthening sub-tropical mid-level wind max will help to sustain the activity, with a continued risk of damaging winds overnight. ...Southern NE/Northern KS tonight... Relatively widespread thunderstorms are expected to form after dark over southwest NE/northwest KS ahead of an approaching shortwave trough. This activity will spread eastward overnight, with sufficient (mainly) elevated CAPE to support hail and gusty winds in the stronger cores.
https://www.spc.noaa.gov/products/outlook/day1otlk_2000.html
date: 2024-05-01, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
Mesoscale Discussion 0584 NWS Storm Prediction Center Norman OK 0844 PM CDT Tue Apr 30 2024 Areas affected...Northern/Western Missouri Concerning...Severe Thunderstorm Watch 166... Valid 010144Z - 010315Z The severe weather threat for Severe Thunderstorm Watch 166 continues. SUMMARY...A few strong/severe storms will linger, mainly across northern Missouri this evening. DISCUSSION...Convective trends are down early this evening, partly due to cooling boundary-layer conditions. Convection that developed along/ahead of the cold front/dryline has advanced east-southeast across the instability axis. This activity is encountering a less buoyant environment and updrafts are gradually weakening. Latest trends suggest convection near the IA border may linger a bit longer, primarily due to the southern influence of the upper MS Valley short-wave trough. Even so, marginally severe hail may become the primary risk over the next hour or so. ..Darrow.. 05/01/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...LSX...DVN...SGF...EAX...TOP... LAT...LON 38129544 40539430 40549200 38109323 38129544
https://www.spc.noaa.gov/products/md/md0584.html
date: 2024-05-01, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
Mesoscale Discussion 0583 NWS Storm Prediction Center Norman OK 0755 PM CDT Tue Apr 30 2024 Areas affected...Southeast IA...Northwest IL Concerning...Tornado Watch 163... Valid 010055Z - 010230Z The severe weather threat for Tornado Watch 163 continues. SUMMARY...Convection should gradually weaken as it spreads toward the Mississippi River Valley. New watch is not anticipated downstream. DISCUSSION...A few supercells linger across southern IA, along the southern fringe of large-scale support, in association with ejecting short-wave trough. Most notable, longer-lived supercell is propagating east across Appanoose County is approaching an air mass that is increasingly hostile to surface-based updrafts. While low-level lapse rates were steep at 00z/DVN, MLCAPE was only 40 J/kg, and nocturnal cooling will limit further destabilization. While this lead storm may produce marginally severe hail, or perhaps a brief tornado over the next hour or so, current thinking is convection should gradually weaken as the evening progresses. ..Darrow.. 05/01/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...DVN...DMX... LAT...LON 41489297 41519118 40519098 40659329 41489297
https://www.spc.noaa.gov/products/md/md0583.html
date: 2024-05-01, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
STATUS FOR WATCH 0167 HAS NOT BEEN ISSUED YET
https://www.spc.noaa.gov/products/watch/ws0167.html
date: 2024-05-01, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 167 NWS Storm Prediction Center Norman OK 845 PM CDT Tue Apr 30 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northeast Oklahoma * Effective this Tuesday night from 845 PM until Midnight CDT. * Primary threats include... Scattered damaging winds and isolated significant gusts to 75 mph possible Isolated large hail events to 1.5 inches in diameter possible SUMMARY...A band of severe thunderstorms will likely progress east-southeast across portions of northern and northeast Oklahoma through the late evening. Severe gusts and associated wind damage will be the primary severe hazards accompanying this thunderstorm complex. The severe thunderstorm watch area is approximately along and 35 statute miles north and south of a line from 50 miles west southwest of Bartlesville OK to 35 miles east northeast of Tulsa OK. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU7). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 163...WW 164...WW 165...WW 166... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A few cumulonimbi with maximum tops to 450. Mean storm motion vector 29030. ...Smith
https://www.spc.noaa.gov/products/watch/ww0167.html
date: 2024-05-01, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 165 NWS Storm Prediction Center Norman OK 435 PM CDT Tue Apr 30 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northern and Western Oklahoma Northwest Texas * Effective this Tuesday afternoon and evening from 435 PM until 900 PM CDT. * Primary threats include... Scattered large hail and isolated very large hail events to 2.5 inches in diameter possible Scattered damaging wind gusts to 70 mph possible A tornado or two possible SUMMARY...Widely scattered to scattered thunderstorms will likely develop through the late afternoon into the early evening near and east of the dryline. Some of the stronger storms will probably become supercellular and pose a risk for large to very large hail and severe gusts. A narrow window of time may exist for a brief tornado towards the early evening mainly over the Oklahoma portion of the Watch. The severe thunderstorm watch area is approximately along and 50 statute miles east and west of a line from 25 miles northwest of Ponca City OK to 130 miles south southwest of Altus OK. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU5). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 163...WW 164... AVIATION...A few severe thunderstorms with hail surface and aloft to 2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 24020. ...Smith
https://www.spc.noaa.gov/products/watch/ww0165.html
date: 2024-05-01, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
STATUS REPORT ON WW 165 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 0581 ..THORNTON..05/01/24 ATTN...WFO...OUN...SJT...LUB... STATUS REPORT FOR WS 165 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS OKC003-011-015-017-031-039-043-047-053-055-065-071-073-075-083- 093-103-141-149-151-010240- OK . OKLAHOMA COUNTIES INCLUDED ARE ALFALFA BLAINE CADDO CANADIAN COMANCHE CUSTER DEWEY GARFIELD GRANT GREER JACKSON KAY KINGFISHER KIOWA LOGAN MAJOR NOBLE TILLMAN WASHITA WOODS TXC023-155-197-207-263-269-275-433-447-485-487-010240- TX . TEXAS COUNTIES INCLUDED ARE BAYLOR FOARD HARDEMAN HASKELL KENT KING KNOX STONEWALL THROCKMORTON WICHITA WILBARGER
https://www.spc.noaa.gov/products/watch/ws0165.html
date: 2024-05-01, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 166 NWS Storm Prediction Center Norman OK 550 PM CDT Tue Apr 30 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Eastern Kansas Western and Northern Missouri * Effective this Tuesday afternoon from 550 PM until Midnight CDT. * Primary threats include... Scattered damaging winds and isolated significant gusts to 75 mph likely Scattered large hail and isolated very large hail events to 2.5 inches in diameter likely A tornado or two possible SUMMARY...An organized band of severe thunderstorms over eastern Kansas and northwest Missouri will continue to move east this evening into the Watch area. Supercells with an attendant risk for large to very large hail, perhaps a tornado, and severe gusts are possible before some upscale growth into one or more linear bands of storms later this evening. As the linear upscale growth occurs, wind damage will increasingly become the primary severe hazard. The severe thunderstorm watch area is approximately along and 60 statute miles east and west of a line from 45 miles northwest of Kirksville MO to 55 miles south southeast of Olathe KS. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU6). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 163...WW 164...WW 165... AVIATION...A few severe thunderstorms with hail surface and aloft to 2.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 27035. ...Smith
https://www.spc.noaa.gov/products/watch/ww0166.html
date: 2024-05-01, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
STATUS REPORT ON WW 166 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..SPC..05/01/24 ATTN...WFO...EAX... STATUS REPORT FOR WS 166 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS KSC091-103-107-121-209-010140- KS . KANSAS COUNTIES INCLUDED ARE JOHNSON LEAVENWORTH LINN MIAMI WYANDOTTE MOC001-013-025-033-037-041-047-049-053-061-079-081-083-089-095- 101-107-115-117-121-129-159-165-171-175-177-195-197-211- 010140- MO . MISSOURI COUNTIES INCLUDED ARE ADAIR BATES CALDWELL CARROLL CASS CHARITON CLAY CLINTON COOPER DAVIESS GRUNDY HARRISON HENRY HOWARD JACKSON JOHNSON LAFAYETTE LINN LIVINGSTON MACON MERCER PETTIS PLATTE PUTNAM RANDOLPH RAY SALINE SCHUYLER SULLIVAN
https://www.spc.noaa.gov/products/watch/ws0166.html
date: 2024-05-01, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
STATUS REPORT ON WW 163 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 W LWD TO 50 ESE FOD. ..SPC..05/01/24 ATTN...WFO...DMX...OAX...FSD... STATUS REPORT FOR WT 163 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS IAC007-039-051-053-083-099-117-121-123-125-127-135-153-157-159- 169-171-179-181-185-010140- IA . IOWA COUNTIES INCLUDED ARE APPANOOSE CLARKE DAVIS DECATUR HARDIN JASPER LUCAS MADISON MAHASKA MARION MARSHALL MONROE POLK POWESHIEK RINGGOLD STORY TAMA WAPELLO WARREN WAYNE THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
https://www.spc.noaa.gov/products/watch/ws0163.html
date: 2024-05-01, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 163 NWS Storm Prediction Center Norman OK 135 PM CDT Tue Apr 30 2024 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Southern and Western Iowa Eastern Nebraska * Effective this Tuesday afternoon and evening from 135 PM until 1000 PM CDT. * Primary threats include... A few tornadoes possible Scattered damaging winds and isolated significant gusts to 80 mph likely Scattered large hail and isolated very large hail events to 2.5 inches in diameter likely SUMMARY...Severe thunderstorms will develop this afternoon over eastern Nebraska and track eastward across the watch area through the evening. The tornado watch area is approximately along and 60 statute miles north and south of a line from 50 miles north northwest of Lincoln NE to 35 miles east of Knoxville IA. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU3). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Watch means conditions are favorable for tornadoes and severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. && AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 2.5 inches. Extreme turbulence and surface wind gusts to 70 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 27035. ...Hart
https://www.spc.noaa.gov/products/watch/ww0163.html
date: 2024-05-01, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 164 NWS Storm Prediction Center Norman OK 330 PM CDT Tue Apr 30 2024 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Eastern Kansas Northwest Missouri * Effective this Tuesday afternoon and evening from 330 PM until 1100 PM CDT. * Primary threats include... A few tornadoes possible Scattered large hail and isolated very large hail events to 2.5 inches in diameter likely Scattered damaging wind gusts to 70 mph likely SUMMARY...Thunderstorms will develop this afternoon along a cold front/dryline over eastern Kansas and drift eastward through the afternoon and evening. Supercells capable of very large hail are the main concern, although damaging winds and a tornado or two may also occur. The tornado watch area is approximately along and 55 statute miles east and west of a line from 45 miles northeast of Falls City NE to 50 miles south southeast of Wichita KS. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU4). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Watch means conditions are favorable for tornadoes and severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. && OTHER WATCH INFORMATION...CONTINUE...WW 163... AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 26025. ...Hart
https://www.spc.noaa.gov/products/watch/ww0164.html
date: 2024-05-01, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
STATUS REPORT ON WW 164 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 WSW ICT TO 30 ENE ICT TO 10 E EMP TO 15 E TOP TO 35 W LWD. ..SPC..05/01/24 ATTN...WFO...ICT...TOP...EAX... STATUS REPORT FOR WT 164 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS KSC001-003-015-019-031-035-045-049-059-073-077-087-133-191-205- 207-010140- KS . KANSAS COUNTIES INCLUDED ARE ALLEN ANDERSON BUTLER CHAUTAUQUA COFFEY COWLEY DOUGLAS ELK FRANKLIN GREENWOOD HARPER JEFFERSON NEOSHO SUMNER WILSON WOODSON MOC075-227-010140- MO . MISSOURI COUNTIES INCLUDED ARE GENTRY WORTH THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
https://www.spc.noaa.gov/products/watch/ws0164.html
date: 2024-04-29, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
Mesoscale Discussion 0572 NWS Storm Prediction Center Norman OK 1258 PM CDT Mon Apr 29 2024 Areas affected...the Michigan Thumb vicinity Concerning...Severe potential...Watch unlikely Valid 291758Z - 292000Z Probability of Watch Issuance...20 percent SUMMARY...The evolution of an isolated supercell accompanied by at least some potential for a tornado, in addition severe hail and wind, appears possible across the Michigan Thumb vicinity near Bad Axe through 3-5 PM EDT. DISCUSSION...Downstream of larger-scale mid-level troughing, with an embedded low, migrating northeastward into/through the Upper Midwest/Great Lakes vicinity, a strong south-southwesterly mid-level jet (40-70 kt in the 700-500 mb layer) is in the process of propagating across lower Michigan. In association with this feature, an area of stronger surface pressure falls (2-3+ mb 2 hourly) has generally begun to shift across Lake Huron, but still extends along an axis as far south as the Flint MI vicinity. This is near a weak surface frontal low which is forecast to migrate across and northeast of the Bad Axe vicinity through 19-21Z. South of the front, boundary-layer moistening (including surface dew points around 60f) has been sufficient to contribute to weak destabilization (including mixed-layer CAPE increasing up to 500 J/kg). Although further heating and mixing may reduce this some to the south of the front, this may be maintained along the front, just ahead of the low, which may gradually provide a focus for intensifying convection. Given the strength of the vertical shear, including sizable clockwise-curved low-level hodographs, and localized forcing for ascent, the evolution of a supercell appears possible, which may pose at least some risk for producing a tornado, in addition to marginally severe hail and wind. ..Kerr/Hart.. 04/29/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...DTX... LAT...LON 43518375 44018294 43788262 43438274 43228323 43248368 43518375
https://www.spc.noaa.gov/products/md/md0572.html
date: 2024-04-29, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1231 PM CDT Mon Apr 29 2024 Valid 301200Z - 011200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS OVER SOUTHWEST MN...WESTERN IA...FAR NORTHWEST MO...EASTERN KS...EASTERN NE AND FAR SOUTHEAST SD... ...SUMMARY... Severe thunderstorms will be possible on Tuesday from parts of the mid/upper Mississippi Valley into the central/southern Plains. The greatest threat is expected from eastern Nebraska into parts of western Iowa and southwest Minnesota, with a risk of very large hail, severe wind gusts, and a few tornadoes. ...Synopsis... An upper cyclone is forecast to be centered over southeastern British Columbia/southwest Alberta early Tuesday morning. A series of shortwave troughs are expected to traverse the moderate mid-level flow is extended throughout the base of this cyclone. The lead wave in this series will likely move from the central High Plains northeastward across the northern/central Plains into the Upper Midwest throughout the day, accompanied by gradually strengthening mid-level flow. A weak cold front and associated surface troughing will precede this shortwave, with consolidation into more prominent low anticipated from the Mid MO Valley into the Upper Midwest during the afternoon and evening. Northern portion of this front near the surface low will remain progressive, continuing eastward through the Upper Midwest overnight. However, southern portion of the front will slow and eventually stall across KS, with additional surface cyclogenesis possible along the western portion of this boundary over western KS and the eastern TX/OK Panhandles. Farther east, a shortwave trough is expected to gradually shift eastward from the Lower OH Valley/Mid-South across the TN Valley and Southeast states, reaching the Mid-Atlantic States by early Wednesday morning. Some phasing between this wave and a separate low-amplitude shortwave farther north over the Lower Great Lakes/southwestern Ontario is possible. Isolated thunderstorms are anticipated ahead of both of these waves across much of the eastern CONUS (i.e. from the Upper OH Valley/Northeast States into the Southeast). However, limited buoyancy and weak shear should temper the overall severe potential across the majority of the area, although a locally increased risk is possible from central NY through eastern PA and from eastern GA through SC. ...Mid MO Valley into Eastern KS... Low-level moisture is expected to advect quickly northward throughout the day, ahead of the approaching shortwave trough and associated surface trough/cold front. Consensus among the guidance brings low 60s dewpoints into the northeastern KS/northwest MO/southeastern NE border vicinity by the mid afternoon, with upper 50s northward along the NE/IA border. This low-level moisture combined with modest daytime heating and steep mid-level lapse rates will support moderate buoyancy (i.e. 1500 to 2000 J/kg). Thunderstorm development is anticipated along the front during the afternoon, beginning across eastern SD/southwestern MN then extending southwestward across eastern NE. Given the moderate buoyancy, robust updrafts should develop quickly, and vertical shear will be strong enough to support organized storm structures. Large to very large hail is likely with initial development before the storms undergo a relatively quick upscale growth, with the transition to a more linear mode favoring strong gusts. Some gusts to 75 mph are possible. The tornado threat is a bit more complex. There is enough low-level curvature to support tornadogenesis, but the overall potential may be limited by the quick upscale growth and relatively short time duration storms will be in a discrete mode. That being said, some tornado threat is possible within the line as well, particularly across western IA during the early evening (i.e. around 00Z) as the low-level jet increases. ...Central KS southwestward across Western OK into Southwest TX... Most of the stronger large-scale forcing for ascent is anticipated farther north, but persistent low-level convergence along the dryline could result in isolated to widely scattered thunderstorm initiation. Any storms that mature could produce large to very large hail and damaging downbursts. Guidance has trended towards a bit more thunderstorm coverage from northwest into southwest TX, but the lack of stronger large scale forcing limits forecast confidence, precluding the introduction of higher probabilities with this outlook. ..Mosier.. 04/29/2024
https://www.spc.noaa.gov/products/outlook/day2otlk_1730.html
date: 2024-04-29, from: NOAA tornado/severe thunderstorm watches, mesoscale discussions, convective outlooks, fire weather outlooks
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1113 AM CDT Mon Apr 29 2024 Valid 291630Z - 301200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS THROUGH LATE AFTERNOON ACROSS THE LOWER MS VALLEY...SOUTH TX...AND SOUTHEAST LOWER MI... ...SUMMARY... Marginally severe wind gusts and hail will be possible today across south Texas, the lower Mississippi Valley and southeast Lower Michigan. ...LA/MS/AL... A decaying linear MCS is moving slowly southeastward across southern LA, with the most active part of the line well offshore. The leading outflow boundary extends northward across southeast LA into central MS, with a warm/moist low-level air mass in place to the east. Some rejuvenation of thunderstorms along this line is expected this afternoon, with storms tracking eastward toward southwest AL this evening. Mid-level lapse rates are weak in this area, along with weak to moderately strong low to mid-level wind fields. This suggests some risk of gusty or possibly damaging winds with these storms, but the threat is expected to remain rather isolated. ...Southeast Lower MI... Visible satellite imagery shows strong heating occurring over southeast Lower MI today, but with a broad area of clouds and light precipitation approaching from the southwest. Several morning CAM solutions show scattered afternoon thunderstorms developing along the leading edge of this cloud deck. Storms will sweep across the area rather quickly, with steepening low-level lapse rates posing a risk of locally gusty/damaging wind gusts in the strongest cells. An isolated tornado cannot be ruled out as well - especially along a surface boundary that extends across the Thumb area. ...South TX... A moist and moderately unstable air mass is present today across south TX, ahead of a weak front. The coverage of thunderstorms is expected to be quite limited today in this region, but any storm that forms could pose a risk of large hail for a few hours. ..Hart/Lyons.. 04/29/2024
https://www.spc.noaa.gov/products/outlook/day1otlk_1630.html