SPC Feb 6, 2024 0830 UTC Day 3 Severe Thunderstorm Outlook

1 year 5 months ago
SPC 0830Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0152 AM CST Tue Feb 06 2024 Valid 081200Z - 091200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... A few general thunderstorms may occur over the upper Mississippi Valley on Thursday. Severe weather is unlikely. ...Synopsis... On Thursday, a large upper trough will affect much of the western and central CONUS, with a primary embedded shortwave trough developing from the central Plains into the mid MS Valley. The parent upper low will deepen slightly through the period as it moves from the Dakotas into MN. At the surface, low pressure will follow a similar path to the upper low, being vertically stacked. A broad fetch of southwesterly low-level flow will spread northward ahead of the low, but low-level moisture will lag, as will destabilization. While cold air aloft and areas of daytime heating may lead to weak instability over the upper MS Valley, substantial midlevel drying will also occur. As such, the plume of 50s to lower 60s F dewpoints across the Sabine Valley is expected to remain inactive as ascent will be well north of that area. Elevated CAPE up to 250 J/kg may support scattered weak convection north of the midlevel jet, most likely from MN into WI during the afternoon. The weak instability levels should preclude any severe threat. ..Jewell.. 02/06/2024 Read more

SPC Feb 6, 2024 0830 UTC Day 3 Severe Thunderstorm Outlook

1 year 5 months ago
SPC 0830Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0152 AM CST Tue Feb 06 2024 Valid 081200Z - 091200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... A few general thunderstorms may occur over the upper Mississippi Valley on Thursday. Severe weather is unlikely. ...Synopsis... On Thursday, a large upper trough will affect much of the western and central CONUS, with a primary embedded shortwave trough developing from the central Plains into the mid MS Valley. The parent upper low will deepen slightly through the period as it moves from the Dakotas into MN. At the surface, low pressure will follow a similar path to the upper low, being vertically stacked. A broad fetch of southwesterly low-level flow will spread northward ahead of the low, but low-level moisture will lag, as will destabilization. While cold air aloft and areas of daytime heating may lead to weak instability over the upper MS Valley, substantial midlevel drying will also occur. As such, the plume of 50s to lower 60s F dewpoints across the Sabine Valley is expected to remain inactive as ascent will be well north of that area. Elevated CAPE up to 250 J/kg may support scattered weak convection north of the midlevel jet, most likely from MN into WI during the afternoon. The weak instability levels should preclude any severe threat. ..Jewell.. 02/06/2024 Read more

SPC Day 2 Fire Weather Outlook

1 year 5 months ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0124 AM CST Tue Feb 06 2024 Valid 071200Z - 081200Z ...NO CRITICAL AREAS... ...Synopsis... An upper ridge will progress toward the East Coast as a pronounced mid-level trough ejects into the Plains states tomorrow/Wednesday. Surface high pressure and associated dry air (i.e. RH below 35 percent in spots) will linger around the Appalachians and points east. A surface cyclone will develop over the northern High Plains, encouraging moisture return across the southern and central Plains, but dry downslope flow across portions of far western Texas. In general, fuels remain poorly receptive to fire spread in most locations, precluding the introduction of fire weather highlights anywhere across the CONUS. ..Squitieri.. 02/06/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook

1 year 5 months ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0124 AM CST Tue Feb 06 2024 Valid 071200Z - 081200Z ...NO CRITICAL AREAS... ...Synopsis... An upper ridge will progress toward the East Coast as a pronounced mid-level trough ejects into the Plains states tomorrow/Wednesday. Surface high pressure and associated dry air (i.e. RH below 35 percent in spots) will linger around the Appalachians and points east. A surface cyclone will develop over the northern High Plains, encouraging moisture return across the southern and central Plains, but dry downslope flow across portions of far western Texas. In general, fuels remain poorly receptive to fire spread in most locations, precluding the introduction of fire weather highlights anywhere across the CONUS. ..Squitieri.. 02/06/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook

1 year 5 months ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0124 AM CST Tue Feb 06 2024 Valid 071200Z - 081200Z ...NO CRITICAL AREAS... ...Synopsis... An upper ridge will progress toward the East Coast as a pronounced mid-level trough ejects into the Plains states tomorrow/Wednesday. Surface high pressure and associated dry air (i.e. RH below 35 percent in spots) will linger around the Appalachians and points east. A surface cyclone will develop over the northern High Plains, encouraging moisture return across the southern and central Plains, but dry downslope flow across portions of far western Texas. In general, fuels remain poorly receptive to fire spread in most locations, precluding the introduction of fire weather highlights anywhere across the CONUS. ..Squitieri.. 02/06/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook

1 year 5 months ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0124 AM CST Tue Feb 06 2024 Valid 071200Z - 081200Z ...NO CRITICAL AREAS... ...Synopsis... An upper ridge will progress toward the East Coast as a pronounced mid-level trough ejects into the Plains states tomorrow/Wednesday. Surface high pressure and associated dry air (i.e. RH below 35 percent in spots) will linger around the Appalachians and points east. A surface cyclone will develop over the northern High Plains, encouraging moisture return across the southern and central Plains, but dry downslope flow across portions of far western Texas. In general, fuels remain poorly receptive to fire spread in most locations, precluding the introduction of fire weather highlights anywhere across the CONUS. ..Squitieri.. 02/06/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook

1 year 5 months ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0124 AM CST Tue Feb 06 2024 Valid 071200Z - 081200Z ...NO CRITICAL AREAS... ...Synopsis... An upper ridge will progress toward the East Coast as a pronounced mid-level trough ejects into the Plains states tomorrow/Wednesday. Surface high pressure and associated dry air (i.e. RH below 35 percent in spots) will linger around the Appalachians and points east. A surface cyclone will develop over the northern High Plains, encouraging moisture return across the southern and central Plains, but dry downslope flow across portions of far western Texas. In general, fuels remain poorly receptive to fire spread in most locations, precluding the introduction of fire weather highlights anywhere across the CONUS. ..Squitieri.. 02/06/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook

1 year 5 months ago
SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0124 AM CST Tue Feb 06 2024 Valid 061200Z - 071200Z ...NO CRITICAL AREAS... ...Synopsis... An upper ridge will overspread the central and eastern CONUS today as a mid-level trough impinges on the Rocky Mountains. Rain and snow accompanying the mid-level trough will continue across California into the Interior West while surface high pressure will encourage relatively weak surface winds atop poorly receptive fuels east of the Rockies. The net result will be quiescent fire weather conditions across the CONUS. ..Squitieri.. 02/06/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook

1 year 5 months ago
SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0124 AM CST Tue Feb 06 2024 Valid 061200Z - 071200Z ...NO CRITICAL AREAS... ...Synopsis... An upper ridge will overspread the central and eastern CONUS today as a mid-level trough impinges on the Rocky Mountains. Rain and snow accompanying the mid-level trough will continue across California into the Interior West while surface high pressure will encourage relatively weak surface winds atop poorly receptive fuels east of the Rockies. The net result will be quiescent fire weather conditions across the CONUS. ..Squitieri.. 02/06/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook

1 year 5 months ago
SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0124 AM CST Tue Feb 06 2024 Valid 061200Z - 071200Z ...NO CRITICAL AREAS... ...Synopsis... An upper ridge will overspread the central and eastern CONUS today as a mid-level trough impinges on the Rocky Mountains. Rain and snow accompanying the mid-level trough will continue across California into the Interior West while surface high pressure will encourage relatively weak surface winds atop poorly receptive fuels east of the Rockies. The net result will be quiescent fire weather conditions across the CONUS. ..Squitieri.. 02/06/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook

1 year 5 months ago
SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0124 AM CST Tue Feb 06 2024 Valid 061200Z - 071200Z ...NO CRITICAL AREAS... ...Synopsis... An upper ridge will overspread the central and eastern CONUS today as a mid-level trough impinges on the Rocky Mountains. Rain and snow accompanying the mid-level trough will continue across California into the Interior West while surface high pressure will encourage relatively weak surface winds atop poorly receptive fuels east of the Rockies. The net result will be quiescent fire weather conditions across the CONUS. ..Squitieri.. 02/06/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook

1 year 5 months ago
SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0124 AM CST Tue Feb 06 2024 Valid 061200Z - 071200Z ...NO CRITICAL AREAS... ...Synopsis... An upper ridge will overspread the central and eastern CONUS today as a mid-level trough impinges on the Rocky Mountains. Rain and snow accompanying the mid-level trough will continue across California into the Interior West while surface high pressure will encourage relatively weak surface winds atop poorly receptive fuels east of the Rockies. The net result will be quiescent fire weather conditions across the CONUS. ..Squitieri.. 02/06/2024 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Feb 6, 2024 0700 UTC Day 2 Convective Outlook

1 year 5 months ago
SPC 0700Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1153 PM CST Mon Feb 05 2024 Valid 071200Z - 081200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast on Wednesday. ...Synopsis... A large upper trough will remain over the West on Wednesday, with an intense shortwave moving from northern Mexico into the southern Plains. Behind this lead wave, low heights with cold temperatures aloft will remain over the West Coast as a backside wave pushes south along the coast. Preceding the Plains wave, low pressure will develop over the central and northern Plains, with increasing southerly winds at the surface. However, given the prominent surface ridge over the East, poor moisture return is forecast. Indeed, little to no instability is forecast to develop over the central High Plains in the synoptically favored area, though weak elevated instability cannot be ruled out. Overall, the threat of thunderstorms across the warm sector is very low. A greater chance of scattered thunderstorms will occur beneath the cold air aloft and mainly confined to the Four Corners states, and perhaps near the Coastal Range in southern CA. Favored areas for diurnal development will be along the Mogollon Rim and perhaps over the higher terrain of northern NM. While sporadic lightning flashes cannot be ruled out over parts of the central Plains, chances appear less than 10% at this time. ..Jewell.. 02/06/2024 Read more

SPC Feb 6, 2024 0700 UTC Day 2 Convective Outlook

1 year 5 months ago
SPC 0700Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1153 PM CST Mon Feb 05 2024 Valid 071200Z - 081200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast on Wednesday. ...Synopsis... A large upper trough will remain over the West on Wednesday, with an intense shortwave moving from northern Mexico into the southern Plains. Behind this lead wave, low heights with cold temperatures aloft will remain over the West Coast as a backside wave pushes south along the coast. Preceding the Plains wave, low pressure will develop over the central and northern Plains, with increasing southerly winds at the surface. However, given the prominent surface ridge over the East, poor moisture return is forecast. Indeed, little to no instability is forecast to develop over the central High Plains in the synoptically favored area, though weak elevated instability cannot be ruled out. Overall, the threat of thunderstorms across the warm sector is very low. A greater chance of scattered thunderstorms will occur beneath the cold air aloft and mainly confined to the Four Corners states, and perhaps near the Coastal Range in southern CA. Favored areas for diurnal development will be along the Mogollon Rim and perhaps over the higher terrain of northern NM. While sporadic lightning flashes cannot be ruled out over parts of the central Plains, chances appear less than 10% at this time. ..Jewell.. 02/06/2024 Read more

SPC Feb 6, 2024 0700 UTC Day 2 Convective Outlook

1 year 5 months ago
SPC 0700Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1153 PM CST Mon Feb 05 2024 Valid 071200Z - 081200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast on Wednesday. ...Synopsis... A large upper trough will remain over the West on Wednesday, with an intense shortwave moving from northern Mexico into the southern Plains. Behind this lead wave, low heights with cold temperatures aloft will remain over the West Coast as a backside wave pushes south along the coast. Preceding the Plains wave, low pressure will develop over the central and northern Plains, with increasing southerly winds at the surface. However, given the prominent surface ridge over the East, poor moisture return is forecast. Indeed, little to no instability is forecast to develop over the central High Plains in the synoptically favored area, though weak elevated instability cannot be ruled out. Overall, the threat of thunderstorms across the warm sector is very low. A greater chance of scattered thunderstorms will occur beneath the cold air aloft and mainly confined to the Four Corners states, and perhaps near the Coastal Range in southern CA. Favored areas for diurnal development will be along the Mogollon Rim and perhaps over the higher terrain of northern NM. While sporadic lightning flashes cannot be ruled out over parts of the central Plains, chances appear less than 10% at this time. ..Jewell.. 02/06/2024 Read more

SPC Feb 6, 2024 0700 UTC Day 2 Convective Outlook

1 year 5 months ago
SPC 0700Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1153 PM CST Mon Feb 05 2024 Valid 071200Z - 081200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast on Wednesday. ...Synopsis... A large upper trough will remain over the West on Wednesday, with an intense shortwave moving from northern Mexico into the southern Plains. Behind this lead wave, low heights with cold temperatures aloft will remain over the West Coast as a backside wave pushes south along the coast. Preceding the Plains wave, low pressure will develop over the central and northern Plains, with increasing southerly winds at the surface. However, given the prominent surface ridge over the East, poor moisture return is forecast. Indeed, little to no instability is forecast to develop over the central High Plains in the synoptically favored area, though weak elevated instability cannot be ruled out. Overall, the threat of thunderstorms across the warm sector is very low. A greater chance of scattered thunderstorms will occur beneath the cold air aloft and mainly confined to the Four Corners states, and perhaps near the Coastal Range in southern CA. Favored areas for diurnal development will be along the Mogollon Rim and perhaps over the higher terrain of northern NM. While sporadic lightning flashes cannot be ruled out over parts of the central Plains, chances appear less than 10% at this time. ..Jewell.. 02/06/2024 Read more

SPC Feb 6, 2024 0700 UTC Day 2 Convective Outlook

1 year 5 months ago
SPC 0700Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1153 PM CST Mon Feb 05 2024 Valid 071200Z - 081200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not forecast on Wednesday. ...Synopsis... A large upper trough will remain over the West on Wednesday, with an intense shortwave moving from northern Mexico into the southern Plains. Behind this lead wave, low heights with cold temperatures aloft will remain over the West Coast as a backside wave pushes south along the coast. Preceding the Plains wave, low pressure will develop over the central and northern Plains, with increasing southerly winds at the surface. However, given the prominent surface ridge over the East, poor moisture return is forecast. Indeed, little to no instability is forecast to develop over the central High Plains in the synoptically favored area, though weak elevated instability cannot be ruled out. Overall, the threat of thunderstorms across the warm sector is very low. A greater chance of scattered thunderstorms will occur beneath the cold air aloft and mainly confined to the Four Corners states, and perhaps near the Coastal Range in southern CA. Favored areas for diurnal development will be along the Mogollon Rim and perhaps over the higher terrain of northern NM. While sporadic lightning flashes cannot be ruled out over parts of the central Plains, chances appear less than 10% at this time. ..Jewell.. 02/06/2024 Read more

SPC Feb 6, 2024 0600 UTC Day 1 Convective Outlook

1 year 5 months ago
SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1115 PM CST Mon Feb 05 2024 Valid 061200Z - 071200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... The risk for severe thunderstorms appears negligible across the U.S., today through tonight. ...Synopsis... Mid/upper flow across the southern mid-latitude and subtropical eastern Pacific into western Atlantic is forecast to remain strong and amplified, but perhaps continue to become a bit more progressive through this period. Within this regime, models suggest that a significant surface cyclone, now developing northeast of the Bahamas, may deepen further, before occluding, with secondary surface cyclogenesis proceeding east-northeastward across the western Atlantic. Upstream, mid-level ridging likely will shift from the lee of the Rockies across and east of the Mississippi Valley today through tonight, as trailing large-scale mid-level troughing accelerates northeastward, inland of coastal southern California and Baja California through much of the Southwest and northwestern Mexico by early Wednesday. As a surface low associated with the latter feature migrates northeast of the southern Sierra Nevada into the northern intermountain region, a trailing cold front will advance across the Great Basin and Southwest into the southern Rockies, preceded by gradually deepening surface troughing to the lee of the Rockies. While this probably will be accompanied by a strengthening southerly return flow across southern portions of the high plains into the middle Missouri Valley, the low-level environment across much of the western Gulf Basin into Rio Grande Valley is initially dry, with little appreciable modification forecast through this period. ...Southwest... An ongoing influx of low/mid-level moisture off the Pacific, coupled with cooling aloft, may contribute to layers of weak destabilization across much California, and across the Great Basin into the Rockies today through tonight. However, latest model output continues to suggest that the evolution of thermodynamic profiles most conducive to lightning may remain confined to the post-cold frontal regime, beneath the inland spreading mid-level cold core. Generally, it appears that appreciable probabilities for thunderstorm activity may begin to develop near southern California and adjacent northern Baja coastal areas around midday, on the leading edge of stronger cooling (roughly -22 to -24 C at 500 mb) associated with mid-level forcing for ascent and cold advection. As this spreads inland, additional thunderstorm development appears probable across the lower Colorado Valley by late afternoon, and the Mogollon Rim vicinity/lower deserts of central Arizona by late evening. While forecast soundings, particularly across portions of Arizona, suggest that vertical shear profiles might become conditionally supportive of supercell structures, thermodynamic profiles do not appear conducive to an appreciable risk for severe weather. However, small hail and gusty winds could accompany a few of the stronger storms. ...Florida... Beneath a relatively cold mid-level environment, the risk for thunderstorm activity today into tonight appears likely to remain confined to areas offshore of the Atlantic coast, associated with boundary-layer destabilization focused near the Gulf Stream. ..Kerr/Squitieri.. 02/06/2024 Read more

SPC Feb 6, 2024 0600 UTC Day 1 Convective Outlook

1 year 5 months ago
SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1115 PM CST Mon Feb 05 2024 Valid 061200Z - 071200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... The risk for severe thunderstorms appears negligible across the U.S., today through tonight. ...Synopsis... Mid/upper flow across the southern mid-latitude and subtropical eastern Pacific into western Atlantic is forecast to remain strong and amplified, but perhaps continue to become a bit more progressive through this period. Within this regime, models suggest that a significant surface cyclone, now developing northeast of the Bahamas, may deepen further, before occluding, with secondary surface cyclogenesis proceeding east-northeastward across the western Atlantic. Upstream, mid-level ridging likely will shift from the lee of the Rockies across and east of the Mississippi Valley today through tonight, as trailing large-scale mid-level troughing accelerates northeastward, inland of coastal southern California and Baja California through much of the Southwest and northwestern Mexico by early Wednesday. As a surface low associated with the latter feature migrates northeast of the southern Sierra Nevada into the northern intermountain region, a trailing cold front will advance across the Great Basin and Southwest into the southern Rockies, preceded by gradually deepening surface troughing to the lee of the Rockies. While this probably will be accompanied by a strengthening southerly return flow across southern portions of the high plains into the middle Missouri Valley, the low-level environment across much of the western Gulf Basin into Rio Grande Valley is initially dry, with little appreciable modification forecast through this period. ...Southwest... An ongoing influx of low/mid-level moisture off the Pacific, coupled with cooling aloft, may contribute to layers of weak destabilization across much California, and across the Great Basin into the Rockies today through tonight. However, latest model output continues to suggest that the evolution of thermodynamic profiles most conducive to lightning may remain confined to the post-cold frontal regime, beneath the inland spreading mid-level cold core. Generally, it appears that appreciable probabilities for thunderstorm activity may begin to develop near southern California and adjacent northern Baja coastal areas around midday, on the leading edge of stronger cooling (roughly -22 to -24 C at 500 mb) associated with mid-level forcing for ascent and cold advection. As this spreads inland, additional thunderstorm development appears probable across the lower Colorado Valley by late afternoon, and the Mogollon Rim vicinity/lower deserts of central Arizona by late evening. While forecast soundings, particularly across portions of Arizona, suggest that vertical shear profiles might become conditionally supportive of supercell structures, thermodynamic profiles do not appear conducive to an appreciable risk for severe weather. However, small hail and gusty winds could accompany a few of the stronger storms. ...Florida... Beneath a relatively cold mid-level environment, the risk for thunderstorm activity today into tonight appears likely to remain confined to areas offshore of the Atlantic coast, associated with boundary-layer destabilization focused near the Gulf Stream. ..Kerr/Squitieri.. 02/06/2024 Read more

SPC Feb 6, 2024 0600 UTC Day 1 Convective Outlook

1 year 5 months ago
SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1115 PM CST Mon Feb 05 2024 Valid 061200Z - 071200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... The risk for severe thunderstorms appears negligible across the U.S., today through tonight. ...Synopsis... Mid/upper flow across the southern mid-latitude and subtropical eastern Pacific into western Atlantic is forecast to remain strong and amplified, but perhaps continue to become a bit more progressive through this period. Within this regime, models suggest that a significant surface cyclone, now developing northeast of the Bahamas, may deepen further, before occluding, with secondary surface cyclogenesis proceeding east-northeastward across the western Atlantic. Upstream, mid-level ridging likely will shift from the lee of the Rockies across and east of the Mississippi Valley today through tonight, as trailing large-scale mid-level troughing accelerates northeastward, inland of coastal southern California and Baja California through much of the Southwest and northwestern Mexico by early Wednesday. As a surface low associated with the latter feature migrates northeast of the southern Sierra Nevada into the northern intermountain region, a trailing cold front will advance across the Great Basin and Southwest into the southern Rockies, preceded by gradually deepening surface troughing to the lee of the Rockies. While this probably will be accompanied by a strengthening southerly return flow across southern portions of the high plains into the middle Missouri Valley, the low-level environment across much of the western Gulf Basin into Rio Grande Valley is initially dry, with little appreciable modification forecast through this period. ...Southwest... An ongoing influx of low/mid-level moisture off the Pacific, coupled with cooling aloft, may contribute to layers of weak destabilization across much California, and across the Great Basin into the Rockies today through tonight. However, latest model output continues to suggest that the evolution of thermodynamic profiles most conducive to lightning may remain confined to the post-cold frontal regime, beneath the inland spreading mid-level cold core. Generally, it appears that appreciable probabilities for thunderstorm activity may begin to develop near southern California and adjacent northern Baja coastal areas around midday, on the leading edge of stronger cooling (roughly -22 to -24 C at 500 mb) associated with mid-level forcing for ascent and cold advection. As this spreads inland, additional thunderstorm development appears probable across the lower Colorado Valley by late afternoon, and the Mogollon Rim vicinity/lower deserts of central Arizona by late evening. While forecast soundings, particularly across portions of Arizona, suggest that vertical shear profiles might become conditionally supportive of supercell structures, thermodynamic profiles do not appear conducive to an appreciable risk for severe weather. However, small hail and gusty winds could accompany a few of the stronger storms. ...Florida... Beneath a relatively cold mid-level environment, the risk for thunderstorm activity today into tonight appears likely to remain confined to areas offshore of the Atlantic coast, associated with boundary-layer destabilization focused near the Gulf Stream. ..Kerr/Squitieri.. 02/06/2024 Read more
Checked
5 years 10 months ago
Severe Storms
Storm Prediction Center
Subscribe to Severe Storms feed