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WW 158 SEVERE TSTM TX 211935Z - 220200Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 158 NWS Storm Prediction Center Norman OK 235 PM CDT Fri Apr 21 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Deep South Texas * Effective this Friday afternoon and evening from 235 PM until 900 PM CDT. * Primary threats include... Scattered large hail and isolated very large hail events to 2.5 inches in diameter likely Scattered damaging wind gusts to 70 mph possible SUMMARY...Isolated thunderstorms are expected to intensify across Deep South Texas this afternoon and evening, posing a risk of very large hail and damaging wind gusts. The severe thunderstorm watch area is approximately along and 70 statute miles east and west of a line from 85 miles north of Mcallen TX to Mcallen TX. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU8). 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 2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 550. Mean storm motion vector 30025. ...Hart Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0239 PM CDT Fri Apr 21 2023 Valid 212000Z - 221200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR DEEP SOUTH TEXAS THROUGH EARLY THIS EVENING... ...SUMMARY... Isolated severe thunderstorms will be possible today across parts of south Texas, the lower Mississippi Valley region and upper Ohio Valley/lower Great Lakes. Very large hail is possible over Deep South Texas. ...Discussion... No appreciable change was made to the previous convective outlook. ..Smith.. 04/21/2023 .PREV DISCUSSION... /ISSUED 1112 AM CDT Fri Apr 21 2023/ ...South TX... Strong heating is occurring today over south TX, where dewpoints are in the 70s and afternoon MLCAPE values are forecast to exceed 3500 J/kg. Most CAM guidance shows scattered supercell storms developing across this region by late afternoon. Forecast soundings indicate steep mid-level lapse rates and favorable deep-layer shear, supportive of very large hail potential. Low-level winds are forecast to be rather weak, suggesting the tornado threat is not particularly high. ...ArkLaMiss Region... A decaying MCS is moving southeastward into the central Gulf of Mexico. Clouds associated with this feature are dissipating over much of east TX/AR/LA, allowing partial afternoon heating/destabilization. Dewpoints remain in the mid 60s, which should result in pockets of afternoon MLCAPE of 1000-1500 J/kg. Scattered afternoon thunderstorms are expected to form as a weak cold front sags into this region. While the overall setup in this region is not very robust, a few of the stronger cells could occasionally pose a risk of hail or damaging wind gusts through the early evening. ...Upper OH Valley... A surface cold front is tracking eastward across western OH. Thinning clouds ahead of the front will lead to steep low-level lapse rates and marginal surface-based CAPE by mid-afternoon. Strong winds aloft and forcing along/ahead of the front will result in rather fast-moving showers and thunderstorms capable of gusty winds. Present indications are that limited low-level moisture will result in isolated coverage of stronger cells, so will maintain the ongoing MRGL risk and re-consider an upgrade at 20z. Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0239 PM CDT Fri Apr 21 2023 Valid 212000Z - 221200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FOR DEEP SOUTH TEXAS THROUGH EARLY THIS EVENING... ...SUMMARY... Isolated severe thunderstorms will be possible today across parts of south Texas, the lower Mississippi Valley region and upper Ohio Valley/lower Great Lakes. Very large hail is possible over Deep South Texas. ...Discussion... No appreciable change was made to the previous convective outlook. ..Smith.. 04/21/2023 .PREV DISCUSSION... /ISSUED 1112 AM CDT Fri Apr 21 2023/ ...South TX... Strong heating is occurring today over south TX, where dewpoints are in the 70s and afternoon MLCAPE values are forecast to exceed 3500 J/kg. Most CAM guidance shows scattered supercell storms developing across this region by late afternoon. Forecast soundings indicate steep mid-level lapse rates and favorable deep-layer shear, supportive of very large hail potential. Low-level winds are forecast to be rather weak, suggesting the tornado threat is not particularly high. ...ArkLaMiss Region... A decaying MCS is moving southeastward into the central Gulf of Mexico. Clouds associated with this feature are dissipating over much of east TX/AR/LA, allowing partial afternoon heating/destabilization. Dewpoints remain in the mid 60s, which should result in pockets of afternoon MLCAPE of 1000-1500 J/kg. Scattered afternoon thunderstorms are expected to form as a weak cold front sags into this region. While the overall setup in this region is not very robust, a few of the stronger cells could occasionally pose a risk of hail or damaging wind gusts through the early evening. ...Upper OH Valley... A surface cold front is tracking eastward across western OH. Thinning clouds ahead of the front will lead to steep low-level lapse rates and marginal surface-based CAPE by mid-afternoon. Strong winds aloft and forcing along/ahead of the front will result in rather fast-moving showers and thunderstorms capable of gusty winds. Present indications are that limited low-level moisture will result in isolated coverage of stronger cells, so will maintain the ongoing MRGL risk and re-consider an upgrade at 20z. Read more

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1227 PM CDT Fri Apr 21 2023 Valid 221200Z - 231200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM COASTAL SOUTH CAROLINA NORTHWARD INTO PARTS OF THE MID-ATLANTIC STATES... ...SUMMARY... Widely scattered severe storms are possible from parts of the Carolinas into the Mid Atlantic states Saturday afternoon and evening. Damaging gusts, large hail, and perhaps a brief tornado are possible. ...Synopsis... A negative-tilt upper trough will swing northeastward across the OH Valley and across the Appalachians during the day, with strong height falls into the Mid Atlantic by late afternoon or early evening. To the west, moderate west/northwest flow aloft will persist over the southern Plains with an upper ridge over the West. In the low levels, a surface low near Lake Erie Saturday morning will occlude as it moves northward into Ontario and southern Quebec. A trailing cold front will move east across the Carolinas, VA and PA during the afternoon. Ahead of the front, 50s F dewpoints will be common into PA and NJ, with 60+ dewpoints from southeast VA southward. Aiding moisture advection will be a 40+ kt low-level jet at 850 mb, which will also increase low-level shear. Elsewhere, moisture return will occur from Deep South TX up the Rio Grande Valley, reaching parts of central TX late as an east-west oriented cold front makes southward progress through the period. ...Carolinas/Mid Atlantic... A band of showers and isolated thunderstorms will likely be ongoing over the upper OH Valley extending southward into the southern Appalachians during the morning. Cloud breaks ahead of this precipitation will lead to a destabilizing airmass through early afternoon. Model guidance generally shows around 500 J/kg MLCAPE over VA to 1000-1500 J/kg farther south over the Carolinas. Effective shear supporting organized storms will promote organized multicells and perhaps a couple of transient/weaker supercells. The primary change from the previous outlook was to reduce severe probabilities over parts of GA/southern SC where the stronger forcing for ascent will become increasingly displaced from the region, and lower storm coverage is expected as a result. A few isolated strong to localized severe storms are possible over FL coincident with the diurnal heating cycle. The thunderstorm activity will likely weaken by early evening across FL and the severe risk will diminish as storms push east of the coast into the western Atlantic for areas farther north. ...Parts of central Texas... Little in the way of large-scale lift will exist over the area for much of the day as instability builds with heating and moisture advection. A plume of steep low-level lapse rates is forecast ahead of the front, and isolated storms will be possible after 00Z in the uncapped air mass and near the cold front. Long hodographs will favor hail in the stronger cells, and locally strong gusts. ..Smith.. 04/21/2023 Read more

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1227 PM CDT Fri Apr 21 2023 Valid 221200Z - 231200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM COASTAL SOUTH CAROLINA NORTHWARD INTO PARTS OF THE MID-ATLANTIC STATES... ...SUMMARY... Widely scattered severe storms are possible from parts of the Carolinas into the Mid Atlantic states Saturday afternoon and evening. Damaging gusts, large hail, and perhaps a brief tornado are possible. ...Synopsis... A negative-tilt upper trough will swing northeastward across the OH Valley and across the Appalachians during the day, with strong height falls into the Mid Atlantic by late afternoon or early evening. To the west, moderate west/northwest flow aloft will persist over the southern Plains with an upper ridge over the West. In the low levels, a surface low near Lake Erie Saturday morning will occlude as it moves northward into Ontario and southern Quebec. A trailing cold front will move east across the Carolinas, VA and PA during the afternoon. Ahead of the front, 50s F dewpoints will be common into PA and NJ, with 60+ dewpoints from southeast VA southward. Aiding moisture advection will be a 40+ kt low-level jet at 850 mb, which will also increase low-level shear. Elsewhere, moisture return will occur from Deep South TX up the Rio Grande Valley, reaching parts of central TX late as an east-west oriented cold front makes southward progress through the period. ...Carolinas/Mid Atlantic... A band of showers and isolated thunderstorms will likely be ongoing over the upper OH Valley extending southward into the southern Appalachians during the morning. Cloud breaks ahead of this precipitation will lead to a destabilizing airmass through early afternoon. Model guidance generally shows around 500 J/kg MLCAPE over VA to 1000-1500 J/kg farther south over the Carolinas. Effective shear supporting organized storms will promote organized multicells and perhaps a couple of transient/weaker supercells. The primary change from the previous outlook was to reduce severe probabilities over parts of GA/southern SC where the stronger forcing for ascent will become increasingly displaced from the region, and lower storm coverage is expected as a result. A few isolated strong to localized severe storms are possible over FL coincident with the diurnal heating cycle. The thunderstorm activity will likely weaken by early evening across FL and the severe risk will diminish as storms push east of the coast into the western Atlantic for areas farther north. ...Parts of central Texas... Little in the way of large-scale lift will exist over the area for much of the day as instability builds with heating and moisture advection. A plume of steep low-level lapse rates is forecast ahead of the front, and isolated storms will be possible after 00Z in the uncapped air mass and near the cold front. Long hodographs will favor hail in the stronger cells, and locally strong gusts. ..Smith.. 04/21/2023 Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1217 PM CDT Fri Apr 21 2023 Valid 221200Z - 231200Z ...NO CRITICAL AREAS... No changes were needed with this update. For details, see the previous discussion below. ..Weinman.. 04/21/2023 .PREV DISCUSSION... /ISSUED 0127 AM CDT Fri Apr 21 2023/ ...Synopsis... As high pressure builds into the Plains, a shallow cold pool will develop and move westward into the southern High Plains. This will limit fire weather conditions on Saturday despite some lingering moderate flow aloft as surface mixing is unlikely except for western portions of New Mexico where fuels are less favorable and mid level flow is not as strong. Therefore, no fire weather areas have been included. Some dry and breezy conditions will persist across the Southeast, but vegetation in the region is in full greenup, and fuels are not favorable for large fires. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1217 PM CDT Fri Apr 21 2023 Valid 221200Z - 231200Z ...NO CRITICAL AREAS... No changes were needed with this update. For details, see the previous discussion below. ..Weinman.. 04/21/2023 .PREV DISCUSSION... /ISSUED 0127 AM CDT Fri Apr 21 2023/ ...Synopsis... As high pressure builds into the Plains, a shallow cold pool will develop and move westward into the southern High Plains. This will limit fire weather conditions on Saturday despite some lingering moderate flow aloft as surface mixing is unlikely except for western portions of New Mexico where fuels are less favorable and mid level flow is not as strong. Therefore, no fire weather areas have been included. Some dry and breezy conditions will persist across the Southeast, but vegetation in the region is in full greenup, and fuels are not favorable for large fires. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1141 AM CDT Fri Apr 21 2023 Valid 211700Z - 221200Z ...CRITICAL FIRE WEATHER AREA FOR PORTIONS OF EAST-CENTRAL NEW MEXICO... The previous forecast for the central/southern Plains (see below) remains on track, and only minor adjustments were made based on the latest observations and high-resolution guidance. Farther east, warm, dry, and breezy/gusty conditions are expected across portions of the Mid-Atlantic and central Appalachians ahead of a cold front -- where locally elevated conditions are possible this afternoon. ..Weinman.. 04/21/2023 .PREV DISCUSSION... /ISSUED 0126 AM CDT Fri Apr 21 2023/ ...Synopsis... Strong northwesterly flow will persist through the day today across northern New Mexico and vicinity. At the surface, a lee cyclone will develop in the Texas Panhandle and deepen through the day. Deep mixing is expected across New Mexico during the afternoon in a region of cold air advection. This will help to bring some of the stronger flow to the surface. In addition, the tightening pressure gradient in response to the deepening surface low will also aid in stronger surface winds, particularly in central/east-central New Mexico. Some of this strong northwesterly flow will also overspread western Kansas and vicinity where sufficiently deep mixing may bring some of these winds to the surface. In addition, the pressure gradient will tighten through the day as high pressure builds southward from the northern Plains. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1141 AM CDT Fri Apr 21 2023 Valid 211700Z - 221200Z ...CRITICAL FIRE WEATHER AREA FOR PORTIONS OF EAST-CENTRAL NEW MEXICO... The previous forecast for the central/southern Plains (see below) remains on track, and only minor adjustments were made based on the latest observations and high-resolution guidance. Farther east, warm, dry, and breezy/gusty conditions are expected across portions of the Mid-Atlantic and central Appalachians ahead of a cold front -- where locally elevated conditions are possible this afternoon. ..Weinman.. 04/21/2023 .PREV DISCUSSION... /ISSUED 0126 AM CDT Fri Apr 21 2023/ ...Synopsis... Strong northwesterly flow will persist through the day today across northern New Mexico and vicinity. At the surface, a lee cyclone will develop in the Texas Panhandle and deepen through the day. Deep mixing is expected across New Mexico during the afternoon in a region of cold air advection. This will help to bring some of the stronger flow to the surface. In addition, the tightening pressure gradient in response to the deepening surface low will also aid in stronger surface winds, particularly in central/east-central New Mexico. Some of this strong northwesterly flow will also overspread western Kansas and vicinity where sufficiently deep mixing may bring some of these winds to the surface. In addition, the pressure gradient will tighten through the day as high pressure builds southward from the northern Plains. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

Most of Central Florida is in severe drought, causing local officials to worry about more brush fires occurring. In the past month, 42 wildfires have sparked in Central Florida. While the grass is usually green, the Florida Forest Service stated that it’s down to the dirt at present. WESH Online (Orlando, Fla.), April 20, 2023

The Bureau of Reclamation announced full water allocations for north- and south-of-Delta contractors, up from 80% as was stated in March. Bureau of Reclamation (Washington, D.C.), April 20, 2023 Early winter storms in California increased snowpack and improved reservoir levels, initial allocations for the Central Valley Project were increased, but more late winter and early spring rain and snow is still needed. Allocations may be updated as conditions warrant. Contractors serving many farms will get 35% of their contracted supplies, while those with senior water rights will get 100%, as will wildlife refuges. Municipal and industrial contractors have been allocated 75% of their historic use or public health and safety needs, whichever is greater. The Associated Press (New York), Feb 22, 2023 The Bureau of Reclamation urged Central Valley Project water contractors to plan for reduced water allocations as Shasta Reservoir was at 31% of capacity. Consequently, contractors who receive water for municipal and industrial use should begin planning for “potentially extremely limited water supply conditions” in 2023. The Sun-Gazette (Exeter, Calif.), Dec 20, 2022

The Tampa Water Department began purchasing water from Tampa Bay Water on April 20. Tampa Bay Water provides wholesale drinking water to Hillsborough County, Pasco County, Pinellas County, as well as New Port Richey, St. Petersburg, and Tampa. The water purchase has been made due to the recent below normal rainfall that has led to lower water levels in the Hillsborough River Reservoir. The dry season usually ends in May and will resume in October. City of Tampa (Fla.), April 20, 2023

WW 0154 Status Updates
STATUS REPORT ON WW 154 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 ENE UIN TO 40 W JVL TO 25 WNW LNR. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 0579 ..MOORE..04/20/23 ATTN...WFO...DVN...LOT...ILX...MKX... STATUS REPORT FOR WT 154 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC007-011-031-037-043-057-063-073-089-091-093-095-097-099-103- 105-111-113-123-141-143-155-175-177-179-195-197-201-203- 202240- IL . ILLINOIS COUNTIES INCLUDED ARE BOONE BUREAU COOK DE KALB DUPAGE FULTON GRUNDY HENRY KANE KANKAKEE KENDALL KNOX LAKE LA SALLE LEE LIVINGSTON MCHENRY MCLEAN MARSHALL OGLE PEORIA PUTNAM STARK STEPHENSON TAZEWELL WHITESIDE WILL WINNEBAGO WOODFORD WIC021-025-027-039-045-047-049-055-059-077-079-089-101-105-111- 117-127-131-133-202240- WI Read more

WW 154 TORNADO IA IL WI LM 201905Z - 210100Z
URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 154 NWS Storm Prediction Center Norman OK 205 PM CDT Thu Apr 20 2023 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Far eastern Iowa Northern Illinois Southerrn Wisconsin Lake Michigan * Effective this Thursday afternoon and evening from 205 PM until 800 PM CDT. * Primary threats include... A few tornadoes possible Scattered damaging winds and isolated significant gusts to 75 mph possible Scattered large hail and isolated very large hail events to 2 inches in diameter possible SUMMARY...At least a few supercells should evolve east-northeast from far eastern Iowa across northern Illinois into southern Wisconsin into early evening. This may consolidate into a cluster approaching Lake Michigan. The tornado watch area is approximately along and 70 statute miles east and west of a line from 45 miles north northeast of Madison WI to 30 miles south southwest of Peoria IL. 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 151...WW 152...WW 153... AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 2 inches. Extreme turbulence and surface wind gusts to 65 knots. A few cumulonimbi with maximum tops to 450. Mean storm motion vector 24040. ...Grams Read more

MD 0580 CONCERNING SEVERE THUNDERSTORM WATCH 152...155... FOR PORTIONS OF CENTRAL AND EASTERN TEXAS
Mesoscale Discussion 0580 NWS Storm Prediction Center Norman OK 0354 PM CDT Thu Apr 20 2023 Areas affected...portions of central and eastern Texas Concerning...Severe Thunderstorm Watch 152...155... Valid 202054Z - 202300Z The severe weather threat for Severe Thunderstorm Watch 152, 155 continues. SUMMARY...Large hail and gusty wind threat continues. More favorable corridor for significant hail developing across south-central Texas. DISCUSSION...Storms continue across WW152 and WW155, with occasional large hail up to 1.5" reported across portions of central and eastern Texas. Instances of large hail should persist as storms continue eastward into the more unstable air mass to the east. Deep layer shear remains weak but effective to organize semi-discrete cells, especially along the southern periphery of the front where deep layer shear is less parallel to the front and storm mergers and interactions are ongoing. In this region, the threat for significant hail (with some approaching 3 inches) will be the most likely in the near term as storms approach a region of MLCAPE around 3000 J/kg. ..Thornton/Grams.. 04/20/2023 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...SHV...HGX...FWD...EWX...SJT... LAT...LON 31329858 31799805 32129749 33019647 33839568 33869516 33839458 33659410 33419387 33149383 32839392 32429421 31919468 31319498 30919568 30669615 30439658 30269697 30209757 30219805 30369858 30739883 31329858 Read more

MD 0579 CONCERNING TORNADO WATCH 154... FOR NORTHERN IL....SOUTHERN WI
Mesoscale Discussion 0579 NWS Storm Prediction Center Norman OK 0341 PM CDT Thu Apr 20 2023 Areas affected...Northern IL....Southern WI Concerning...Tornado Watch 154... Valid 202041Z - 202215Z The severe weather threat for Tornado Watch 154 continues. SUMMARY...The threat for severe thunderstorms capable of all severe hazards, including tornadoes, will continue across northern IL and southern WI. DISCUSSION...A few discrete cells initialized along the front over the past hour and half, with a mostly discrete mode persisting until now. These cells have moved slightly off the front, supported by westerly/southwesterly deep-layer flow. If cell interactions can remain limited, these storms should continue to mature, with an associated threat for tornadogenesis. Storm mergers, whether from left splits or varying storm motion from more mature cells, could interrupt this maturing process. In either case, the downstream air mass remain modestly buoyant and strongly sheared and the threat for severe thunderstorms capable of all hazards will continue for the next few hours, particularly across northern IL. ..Mosier/Moore.. 04/20/2023 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...LOT...ILX...MKX...DVN... LAT...LON 42409039 43378990 43488863 42908806 41638797 40528874 40359073 41329075 42409039 Read more

WW 0155 Status Updates
STATUS REPORT ON WW 155 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..MOORE..04/20/23 ATTN...WFO...EWX...SJT... STATUS REPORT FOR WS 155 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS TXC013-019-021-029-031-053-055-091-095-123-127-137-149-163-171- 177-187-209-255-259-265-267-271-285-287-299-307-319-323-325-327- 385-411-413-435-453-463-491-493-507-202140- TX . TEXAS COUNTIES INCLUDED ARE ATASCOSA BANDERA BASTROP BEXAR BLANCO BURNET CALDWELL COMAL CONCHO DEWITT DIMMIT EDWARDS FAYETTE FRIO GILLESPIE GONZALES GUADALUPE HAYS KARNES KENDALL KERR KIMBLE KINNEY LAVACA LEE LLANO MCCULLOCH MASON MAVERICK MEDINA MENARD REAL SAN SABA SCHLEICHER SUTTON TRAVIS UVALDE WILLIAMSON WILSON ZAVALA 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 Read more

WW 155 SEVERE TSTM TX 201930Z - 210300Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 155 NWS Storm Prediction Center Norman OK 230 PM CDT Thu Apr 20 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of South-central Texas * Effective this Thursday afternoon and evening from 230 PM until 1000 PM CDT. * Primary threats include... Scattered damaging winds and isolated significant gusts to 75 mph possible Scattered large hail and isolated very large hail events to 3 inches in diameter possible SUMMARY...Slow-moving, transient supercells and multicell clusters should develop across the Edwards Plateau and Hill Country into this evening. More isolated cells may also develop east of the I-35 corridor. Large hail should be the primary hazard, with severe wind gust potential increasing into the evening. The severe thunderstorm watch area is approximately along and 75 statute miles north and south of a line from 70 miles southwest of Junction TX to 35 miles east southeast of Austin TX. 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 151...WW 152...WW 153...WW 154... AVIATION...A few severe thunderstorms with hail surface and aloft to 3 inches. Extreme turbulence and surface wind gusts to 65 knots. A few cumulonimbi with maximum tops to 550. Mean storm motion vector 30025. ...Grams Read more

WW 0153 Status Updates
STATUS REPORT ON WW 153 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..MOORE..04/20/23 ATTN...WFO...SHV...FWD...HGX... STATUS REPORT FOR WS 153 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ARC027-057-061-073-081-091-099-133-139-202140- AR . ARKANSAS COUNTIES INCLUDED ARE COLUMBIA HEMPSTEAD HOWARD LAFAYETTE LITTLE RIVER MILLER NEVADA SEVIER UNION LAC013-015-017-027-031-061-081-111-119-202140- LA . LOUISIANA PARISHES INCLUDED ARE BIENVILLE BOSSIER CADDO CLAIBORNE DE SOTO LINCOLN RED RIVER UNION WEBSTER OKC089-202140- OK . OKLAHOMA COUNTIES INCLUDED ARE MCCURTAIN Read more

WW 153 SEVERE TSTM AR LA OK TX 201850Z - 210200Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 153 NWS Storm Prediction Center Norman OK 150 PM CDT Thu Apr 20 2023 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Southwest Arkansas Northwest Louisiana Far southeast Oklahoma Central to northeast Texas * Effective this Thursday afternoon and evening from 150 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...A mix of supercells and multicell clusters are expected to develop and spread east through mid evening. Large hail will be the primary threat early, followed by damaging winds later. The severe thunderstorm watch area is approximately along and 100 statute miles east and west of a line from 35 miles northeast of Texarkana AR to 25 miles east southeast of Temple TX. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU3). 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 151...WW 152... 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 27030. ...Grams Read more