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SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1151 PM CST Tue Jan 28 2025 Valid 291200Z - 301200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM CENTRAL TEXAS TO FAR SOUTH-CENTRAL OKLAHOMA... ...SUMMARY... A few strong/possibly severe storms will be possible across parts of the southern Plains Wednesday evening/overnight. ...Synopsis... A closed upper low will drift slowly across the Southwest on Wednesday and start to accelerate east by the end of the period. As this upper low advances east, a low-level jet will strengthen across the southern Plains with a sharpening surface cold front from southeast Oklahoma to central Texas by the end of the period. ...Southern Plains... Richer low-level moisture remains in the Gulf of Mexico early this morning. However, by mid-morning it will start to advance inland as low-level flow strengthens ahead of the mid-level low. This will continue through the day with gradual elevated instability developing from South Texas to North Central Texas. A few elevated thunderstorms may move across Oklahoma and western Arkansas during the afternoon, but these storms should be weak amid weak elevated instability. By around 03Z, the combination of increasing instability (750-1000 J/kg MUCAPE) and increasing isentropic ascent with the strengthening low-level jet should result in widespread thunderstorm development across Central and North Texas between 03 and 06Z. These storms, with around 1000 J/kg MUCAPE and strong (50+ knots) of effective shear, may have an isolated hail threat. Through time, particularly after 06Z, surface based instability will develop across central and south-central Texas as dewpoints rise into the low to mid 60s. In this narrow corridor of greater instability ahead of the front after 12Z, a few severe thunderstorms capable of large hail, severe wind gusts and perhaps a tornado, will be possible. However, the overall threat from this activity is expected to remain muted due to weak (<6 C/km) low-level lapse rates. ...New England... An elongated, 100+ knot mid-level jet will extend from northern Minnesota to southern New England at the beginning of the period and shift east through the period. A surface low will move quickly from eastern Ontario to the Atlantic Ocean off the Maine coast during the morning to early afternoon. As this occurs, a cold front will move quickly east as line of convective showers (perhaps snow squalls given the strong flow), first across New York and then across the rest of the Northeast. Slightly warmer conditions across southern New England may support more mixed-phase with graupel and perhaps some liquid which may result in enough charge separation for some lightning. In addition, the very strong lower tropospheric flow (in excess of 50 knots at 2km) will support windy conditions, perhaps capable of some wind damage across portions of southern New England. ..Bentley/Moore.. 01/29/2025 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1151 PM CST Tue Jan 28 2025 Valid 291200Z - 301200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM CENTRAL TEXAS TO FAR SOUTH-CENTRAL OKLAHOMA... ...SUMMARY... A few strong/possibly severe storms will be possible across parts of the southern Plains Wednesday evening/overnight. ...Synopsis... A closed upper low will drift slowly across the Southwest on Wednesday and start to accelerate east by the end of the period. As this upper low advances east, a low-level jet will strengthen across the southern Plains with a sharpening surface cold front from southeast Oklahoma to central Texas by the end of the period. ...Southern Plains... Richer low-level moisture remains in the Gulf of Mexico early this morning. However, by mid-morning it will start to advance inland as low-level flow strengthens ahead of the mid-level low. This will continue through the day with gradual elevated instability developing from South Texas to North Central Texas. A few elevated thunderstorms may move across Oklahoma and western Arkansas during the afternoon, but these storms should be weak amid weak elevated instability. By around 03Z, the combination of increasing instability (750-1000 J/kg MUCAPE) and increasing isentropic ascent with the strengthening low-level jet should result in widespread thunderstorm development across Central and North Texas between 03 and 06Z. These storms, with around 1000 J/kg MUCAPE and strong (50+ knots) of effective shear, may have an isolated hail threat. Through time, particularly after 06Z, surface based instability will develop across central and south-central Texas as dewpoints rise into the low to mid 60s. In this narrow corridor of greater instability ahead of the front after 12Z, a few severe thunderstorms capable of large hail, severe wind gusts and perhaps a tornado, will be possible. However, the overall threat from this activity is expected to remain muted due to weak (<6 C/km) low-level lapse rates. ...New England... An elongated, 100+ knot mid-level jet will extend from northern Minnesota to southern New England at the beginning of the period and shift east through the period. A surface low will move quickly from eastern Ontario to the Atlantic Ocean off the Maine coast during the morning to early afternoon. As this occurs, a cold front will move quickly east as line of convective showers (perhaps snow squalls given the strong flow), first across New York and then across the rest of the Northeast. Slightly warmer conditions across southern New England may support more mixed-phase with graupel and perhaps some liquid which may result in enough charge separation for some lightning. In addition, the very strong lower tropospheric flow (in excess of 50 knots at 2km) will support windy conditions, perhaps capable of some wind damage across portions of southern New England. ..Bentley/Moore.. 01/29/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0642 PM CST Tue Jan 28 2025 Valid 290100Z - 291200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast across the contiguous United States through tonight. ...Discussion... Thunderstorm activity has waned beneath the upper low across California and Arizona. A few lightning flashes could persist tonight beneath the upper low, but given the boundary layer has already started to cool, expect any additional lightning to be quite isolated. ..Bentley.. 01/29/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0642 PM CST Tue Jan 28 2025 Valid 290100Z - 291200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast across the contiguous United States through tonight. ...Discussion... Thunderstorm activity has waned beneath the upper low across California and Arizona. A few lightning flashes could persist tonight beneath the upper low, but given the boundary layer has already started to cool, expect any additional lightning to be quite isolated. ..Bentley.. 01/29/2025 Read more

No watches are valid as of Tue Jan 28 22:10:02 UTC 2025.

No Mesoscale Discussions are in effect as of Tue Jan 28 22:10:02 UTC 2025.

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0355 PM CST Tue Jan 28 2025 Valid 301200Z - 051200Z Fire weather concerns will remain low in the early part of the extended forecast. An upper-low that has remained over the western US will eject across the southern Rockies into the Plains D2/Wednesday through D3/Thursday, bringing windy conditions but also chances for precipitation across the central/southern Plains. A surface cyclone will develop across the southern Plains D3/Thursday, with strengthening of a lee trough across the High Plains. This pattern will favor a period of elevated fire-weather conditions, particularly across southwestern and western Texas where freeze cured grasses may support risk for fire spread. Elsewhere, marginal fuels and chances for additional precipitation should limit the potential for critical conditions. Zonal flow behind this departing system will favor periods of enhanced westerly flow overspreading the southern Rockies through the weekend, with lee troughing redeveloping D5/Saturday and D6/Sunday. This will bring potential warm/dry downslope flow across portions of western Texas into the Oklahoma Panhandle. Some portion of this region will have seen recent rainfall. However, Elevated to locally Critical fire-weather concerns will be possible across far western Texas where less precipitation was received. For now, confidence is low in highlighting any specific areas. ..Thornton.. 01/28/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0355 PM CST Tue Jan 28 2025 Valid 301200Z - 051200Z Fire weather concerns will remain low in the early part of the extended forecast. An upper-low that has remained over the western US will eject across the southern Rockies into the Plains D2/Wednesday through D3/Thursday, bringing windy conditions but also chances for precipitation across the central/southern Plains. A surface cyclone will develop across the southern Plains D3/Thursday, with strengthening of a lee trough across the High Plains. This pattern will favor a period of elevated fire-weather conditions, particularly across southwestern and western Texas where freeze cured grasses may support risk for fire spread. Elsewhere, marginal fuels and chances for additional precipitation should limit the potential for critical conditions. Zonal flow behind this departing system will favor periods of enhanced westerly flow overspreading the southern Rockies through the weekend, with lee troughing redeveloping D5/Saturday and D6/Sunday. This will bring potential warm/dry downslope flow across portions of western Texas into the Oklahoma Panhandle. Some portion of this region will have seen recent rainfall. However, Elevated to locally Critical fire-weather concerns will be possible across far western Texas where less precipitation was received. For now, confidence is low in highlighting any specific areas. ..Thornton.. 01/28/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0355 PM CST Tue Jan 28 2025 Valid 301200Z - 051200Z Fire weather concerns will remain low in the early part of the extended forecast. An upper-low that has remained over the western US will eject across the southern Rockies into the Plains D2/Wednesday through D3/Thursday, bringing windy conditions but also chances for precipitation across the central/southern Plains. A surface cyclone will develop across the southern Plains D3/Thursday, with strengthening of a lee trough across the High Plains. This pattern will favor a period of elevated fire-weather conditions, particularly across southwestern and western Texas where freeze cured grasses may support risk for fire spread. Elsewhere, marginal fuels and chances for additional precipitation should limit the potential for critical conditions. Zonal flow behind this departing system will favor periods of enhanced westerly flow overspreading the southern Rockies through the weekend, with lee troughing redeveloping D5/Saturday and D6/Sunday. This will bring potential warm/dry downslope flow across portions of western Texas into the Oklahoma Panhandle. Some portion of this region will have seen recent rainfall. However, Elevated to locally Critical fire-weather concerns will be possible across far western Texas where less precipitation was received. For now, confidence is low in highlighting any specific areas. ..Thornton.. 01/28/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0137 PM CST Tue Jan 28 2025 Valid 282000Z - 291200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast across the contiguous United States through tonight. ...20Z Update... The forecast remains on track, and no changes were needed with this update. ..Weinman.. 01/28/2025 .PREV DISCUSSION... /ISSUED 1028 AM CST Tue Jan 28 2025/ ...Discussion... Split upper-level flow will persist over the CONUS with a slow-moving southern-stream upper low over the Southwest Deserts and northwest Mexico. In the presence of steep lapse rates, a few lightning flashes will be possible across southern California and northern Arizona through around sunset. No thunderstorms are expected elsewhere as cool/stable conditions prevail. Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0137 PM CST Tue Jan 28 2025 Valid 282000Z - 291200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast across the contiguous United States through tonight. ...20Z Update... The forecast remains on track, and no changes were needed with this update. ..Weinman.. 01/28/2025 .PREV DISCUSSION... /ISSUED 1028 AM CST Tue Jan 28 2025/ ...Discussion... Split upper-level flow will persist over the CONUS with a slow-moving southern-stream upper low over the Southwest Deserts and northwest Mexico. In the presence of steep lapse rates, a few lightning flashes will be possible across southern California and northern Arizona through around sunset. No thunderstorms are expected elsewhere as cool/stable conditions prevail. Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0137 PM CST Tue Jan 28 2025 Valid 282000Z - 291200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast across the contiguous United States through tonight. ...20Z Update... The forecast remains on track, and no changes were needed with this update. ..Weinman.. 01/28/2025 .PREV DISCUSSION... /ISSUED 1028 AM CST Tue Jan 28 2025/ ...Discussion... Split upper-level flow will persist over the CONUS with a slow-moving southern-stream upper low over the Southwest Deserts and northwest Mexico. In the presence of steep lapse rates, a few lightning flashes will be possible across southern California and northern Arizona through around sunset. No thunderstorms are expected elsewhere as cool/stable conditions prevail. Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0137 PM CST Tue Jan 28 2025 Valid 282000Z - 291200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast across the contiguous United States through tonight. ...20Z Update... The forecast remains on track, and no changes were needed with this update. ..Weinman.. 01/28/2025 .PREV DISCUSSION... /ISSUED 1028 AM CST Tue Jan 28 2025/ ...Discussion... Split upper-level flow will persist over the CONUS with a slow-moving southern-stream upper low over the Southwest Deserts and northwest Mexico. In the presence of steep lapse rates, a few lightning flashes will be possible across southern California and northern Arizona through around sunset. No thunderstorms are expected elsewhere as cool/stable conditions prevail. Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0140 PM CST Tue Jan 28 2025 Valid 291200Z - 301200Z ...NO CRITICAL AREAS... No changes are needed to the D2 Fire Weather Outlook. See previous discussion below for more information. ..Thornton.. 01/28/2025 .PREV DISCUSSION... /ISSUED 0146 AM CST Tue Jan 28 2025/ ...Synopsis... Fire weather concerns are expected to be limited for Wednesday across the country. The upper low currently over western Arizona will shift into the southern Plains through Wednesday evening. Widespread rain chances will overspread the southern Plains and Southwest regions through the day limiting fire weather potential for most areas. One exception is West Texas and south-central NM where rainfall should be limited. While breezy southwest winds are likely, recent guidance suggests the probability of reaching elevated RH thresholds is low. Elsewhere across the country, cool temperatures, weak winds, and/or recent rain/snowfall preclude fire weather concerns. ...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 0140 PM CST Tue Jan 28 2025 Valid 291200Z - 301200Z ...NO CRITICAL AREAS... No changes are needed to the D2 Fire Weather Outlook. See previous discussion below for more information. ..Thornton.. 01/28/2025 .PREV DISCUSSION... /ISSUED 0146 AM CST Tue Jan 28 2025/ ...Synopsis... Fire weather concerns are expected to be limited for Wednesday across the country. The upper low currently over western Arizona will shift into the southern Plains through Wednesday evening. Widespread rain chances will overspread the southern Plains and Southwest regions through the day limiting fire weather potential for most areas. One exception is West Texas and south-central NM where rainfall should be limited. While breezy southwest winds are likely, recent guidance suggests the probability of reaching elevated RH thresholds is low. Elsewhere across the country, cool temperatures, weak winds, and/or recent rain/snowfall preclude fire weather concerns. ...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 0140 PM CST Tue Jan 28 2025 Valid 291200Z - 301200Z ...NO CRITICAL AREAS... No changes are needed to the D2 Fire Weather Outlook. See previous discussion below for more information. ..Thornton.. 01/28/2025 .PREV DISCUSSION... /ISSUED 0146 AM CST Tue Jan 28 2025/ ...Synopsis... Fire weather concerns are expected to be limited for Wednesday across the country. The upper low currently over western Arizona will shift into the southern Plains through Wednesday evening. Widespread rain chances will overspread the southern Plains and Southwest regions through the day limiting fire weather potential for most areas. One exception is West Texas and south-central NM where rainfall should be limited. While breezy southwest winds are likely, recent guidance suggests the probability of reaching elevated RH thresholds is low. Elsewhere across the country, cool temperatures, weak winds, and/or recent rain/snowfall preclude fire weather concerns. ...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 0140 PM CST Tue Jan 28 2025 Valid 291200Z - 301200Z ...NO CRITICAL AREAS... No changes are needed to the D2 Fire Weather Outlook. See previous discussion below for more information. ..Thornton.. 01/28/2025 .PREV DISCUSSION... /ISSUED 0146 AM CST Tue Jan 28 2025/ ...Synopsis... Fire weather concerns are expected to be limited for Wednesday across the country. The upper low currently over western Arizona will shift into the southern Plains through Wednesday evening. Widespread rain chances will overspread the southern Plains and Southwest regions through the day limiting fire weather potential for most areas. One exception is West Texas and south-central NM where rainfall should be limited. While breezy southwest winds are likely, recent guidance suggests the probability of reaching elevated RH thresholds is low. Elsewhere across the country, cool temperatures, weak winds, and/or recent rain/snowfall preclude fire weather concerns. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC 1930Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0119 PM CST Tue Jan 28 2025 Valid 301200Z - 311200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM SOUTHEAST TEXAS INTO PARTS OF LOUISIANA AND FAR SOUTHWEST MS... ...SUMMARY... Strong/isolated severe storms will be possible Thursday from eastern Texas eastward across the Lower Mississippi Valley. ...East TX to the Lower MS Valley... Convection will be ongoing Thursday morning in a low-level warm advection regime ahead of an approaching upper low/trough and attendant surface front. Southerly low-level flow will allow Gulf moisture to advance northward ahead of the surface front from east TX into MS. Low to mid 60s F dewpoints will largely remain near/south of the I-20 corridor, with better quality dewpoints remaining closer to the coast. The corridor of relatively higher dewpoints will also become increasingly narrow/pinched off with north and east extent after 00z. Furthermore, forecast soundings show lackluster midlevel lapse rates with eastward extent. This should result in a fairly confined area of elevated instability sufficient to support organized convection amid strong vertical shear. As such, severe potential is expected to quickly decrease with eastward extent during the nighttime hours. Nevertheless, strong storms are expected to persist along the eastward-advancing surface front through the day across east TX. By late afternoon into early evening, a low-level jet will increase as convection encounters a somewhat more moist boundary layer across LA. This may result in a brief increase in severe potential across portions of LA and adjacent MS when a period of favorable shear overlaps with better instability/quality dew points. Convection will likely remain elevated regardless, but strong to severe gusts are possible, in addition to a few instances of hail. While poor low-level lapse rates and limited surface-based instability will temper the tornado risk, low-level hodographs will become enlarged and curved with the increasing low-level jet around 00z. If low-level thermodynamics evolve more favorably than forecast guidance suggests, a tornado or two may be possible. ..Leitman.. 01/28/2025 Read more

SPC 1930Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0119 PM CST Tue Jan 28 2025 Valid 301200Z - 311200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS FROM SOUTHEAST TEXAS INTO PARTS OF LOUISIANA AND FAR SOUTHWEST MS... ...SUMMARY... Strong/isolated severe storms will be possible Thursday from eastern Texas eastward across the Lower Mississippi Valley. ...East TX to the Lower MS Valley... Convection will be ongoing Thursday morning in a low-level warm advection regime ahead of an approaching upper low/trough and attendant surface front. Southerly low-level flow will allow Gulf moisture to advance northward ahead of the surface front from east TX into MS. Low to mid 60s F dewpoints will largely remain near/south of the I-20 corridor, with better quality dewpoints remaining closer to the coast. The corridor of relatively higher dewpoints will also become increasingly narrow/pinched off with north and east extent after 00z. Furthermore, forecast soundings show lackluster midlevel lapse rates with eastward extent. This should result in a fairly confined area of elevated instability sufficient to support organized convection amid strong vertical shear. As such, severe potential is expected to quickly decrease with eastward extent during the nighttime hours. Nevertheless, strong storms are expected to persist along the eastward-advancing surface front through the day across east TX. By late afternoon into early evening, a low-level jet will increase as convection encounters a somewhat more moist boundary layer across LA. This may result in a brief increase in severe potential across portions of LA and adjacent MS when a period of favorable shear overlaps with better instability/quality dew points. Convection will likely remain elevated regardless, but strong to severe gusts are possible, in addition to a few instances of hail. While poor low-level lapse rates and limited surface-based instability will temper the tornado risk, low-level hodographs will become enlarged and curved with the increasing low-level jet around 00z. If low-level thermodynamics evolve more favorably than forecast guidance suggests, a tornado or two may be possible. ..Leitman.. 01/28/2025 Read more