Severe Storms

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1159 PM CST Sat Feb 17 2024 Valid 181200Z - 191200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF SOUTH FLORIDA... ...SUMMARY... Isolated to scattered thunderstorms, associated with a marginal wind/tornado threat, will be possible across parts of south Florida today. ...South Florida... A shortwave trough will move into the lower Mississippi Valley today, with west-southwesterly mid-level flow located across the eastern Gulf of Mexico and Florida. At the surface, a cold front will likely remain quasi-stationary across south Florida. To the south of the front, surface dewpoints will be in the lower 70s F. As surface temperatures warm across the moist airmass, MLCAPE is forecast to approach 500 J/kg across parts of south Florida. As instability increases during the day, thunderstorm development is expected near and to the south of the front over parts of south Florida. In addition to the instability, RAP forecast soundings within the moist airmass in the vicinity of Miami between 18Z and 21Z have 0-6 km shear around 60 knots, with 0-3 storm-relative helicity near 250 m2/s2. The amount of shear will support storm rotation with cells that are near the strong instability in the early to mid afternoon. If a few rotating storms can develop, then a marginal wind damage/tornado threat will be possible. ..Broyles/Moore.. 02/18/2024 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1159 PM CST Sat Feb 17 2024 Valid 181200Z - 191200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF SOUTH FLORIDA... ...SUMMARY... Isolated to scattered thunderstorms, associated with a marginal wind/tornado threat, will be possible across parts of south Florida today. ...South Florida... A shortwave trough will move into the lower Mississippi Valley today, with west-southwesterly mid-level flow located across the eastern Gulf of Mexico and Florida. At the surface, a cold front will likely remain quasi-stationary across south Florida. To the south of the front, surface dewpoints will be in the lower 70s F. As surface temperatures warm across the moist airmass, MLCAPE is forecast to approach 500 J/kg across parts of south Florida. As instability increases during the day, thunderstorm development is expected near and to the south of the front over parts of south Florida. In addition to the instability, RAP forecast soundings within the moist airmass in the vicinity of Miami between 18Z and 21Z have 0-6 km shear around 60 knots, with 0-3 storm-relative helicity near 250 m2/s2. The amount of shear will support storm rotation with cells that are near the strong instability in the early to mid afternoon. If a few rotating storms can develop, then a marginal wind damage/tornado threat will be possible. ..Broyles/Moore.. 02/18/2024 Read more

SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1159 PM CST Sat Feb 17 2024 Valid 181200Z - 191200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF SOUTH FLORIDA... ...SUMMARY... Isolated to scattered thunderstorms, associated with a marginal wind/tornado threat, will be possible across parts of south Florida today. ...South Florida... A shortwave trough will move into the lower Mississippi Valley today, with west-southwesterly mid-level flow located across the eastern Gulf of Mexico and Florida. At the surface, a cold front will likely remain quasi-stationary across south Florida. To the south of the front, surface dewpoints will be in the lower 70s F. As surface temperatures warm across the moist airmass, MLCAPE is forecast to approach 500 J/kg across parts of south Florida. As instability increases during the day, thunderstorm development is expected near and to the south of the front over parts of south Florida. In addition to the instability, RAP forecast soundings within the moist airmass in the vicinity of Miami between 18Z and 21Z have 0-6 km shear around 60 knots, with 0-3 storm-relative helicity near 250 m2/s2. The amount of shear will support storm rotation with cells that are near the strong instability in the early to mid afternoon. If a few rotating storms can develop, then a marginal wind damage/tornado threat will be possible. ..Broyles/Moore.. 02/18/2024 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0655 PM CST Sat Feb 17 2024 Valid 180100Z - 181200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Isolated thunderstorms will be possible this evening in parts of northern California and far southwest Oregon, but no severe threat is expected. ...DISCUSSION... Along the West Coast, water vapor imagery shows a shortwave trough near the coast of California. This trough will move inland this evening with isolated thunderstorms possible ahead of the trough in parts of northern California and far southwest Oregon. Further east, a shortwave trough is evident on water vapor imagery from the southern Plains into the mid Mississippi Valley, with west to northwest flow located across much of the central and eastern U.S. At the surface, a large area of high pressure is located from the southern and central Plains eastward to the Appalachians Mountains. Northerly flow over the Southeast will keep a dry and relatively cold airmass in place, making thunderstorms unlikely in over the remainder of the continental U.S. through tonight. ..Broyles.. 02/18/2024 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0655 PM CST Sat Feb 17 2024 Valid 180100Z - 181200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Isolated thunderstorms will be possible this evening in parts of northern California and far southwest Oregon, but no severe threat is expected. ...DISCUSSION... Along the West Coast, water vapor imagery shows a shortwave trough near the coast of California. This trough will move inland this evening with isolated thunderstorms possible ahead of the trough in parts of northern California and far southwest Oregon. Further east, a shortwave trough is evident on water vapor imagery from the southern Plains into the mid Mississippi Valley, with west to northwest flow located across much of the central and eastern U.S. At the surface, a large area of high pressure is located from the southern and central Plains eastward to the Appalachians Mountains. Northerly flow over the Southeast will keep a dry and relatively cold airmass in place, making thunderstorms unlikely in over the remainder of the continental U.S. through tonight. ..Broyles.. 02/18/2024 Read more

No watches are valid as of Sat Feb 17 22:26:02 UTC 2024.

No Mesoscale Discussions are in effect as of Sat Feb 17 22:26:02 UTC 2024.

SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0351 PM CST Sat Feb 17 2024 Valid 191200Z - 251200Z Periods of dry and windy conditions will be possible through the extended period, with some drying of fuels anticipated across the southern High Plains (especially on D5/Wednesday). Fire weather highlights will largely depend on the status of fuels, which remain too marginal at this time for inclusion of probabilities within D3-8 period. On D3/Monday, a shortwave trough will enhance west-northwesterly flow aloft across central Rockies with lee trough development and locally dry/breezy conditions across the southern High Plains. By D4/Tuesday, midlevel west-southwesterly flow will further strengthen across the central/southern Rockies ahead of an approaching large-scale trough in the Pacific. Increasing downslope flow will produce dry/windy conditions across the southern High Plains. While drying has been observed in fuels across far western Texas, the overall marginal state of fuels across much of the southern Plains will preclude probabilities at this time. On D5/Wednesday, the Pacific trough will move inland across the western US, with enhanced flow aloft overspreading the southern Rockies. As a result, lee cyclogenesis will favor strong westerly surface winds and low RH across the southern High Plains. Poor recovery is likely Wednesday night into Thursday across southwestern and far western Texas, with breezy post frontal northwesterly flow overlapping elevated to critical relative humidity again D6/Thursday. Elevated to perhaps critical meteorological conditions are possible both D5/Wednesday and D6/Thursday. Confidence in supportive fuels (with mainly marginal fuels over the area) limits confidence in a Critical fire-weather event. Therefore, Critical probabilities have been withheld, though fuel trends leading up to D5/Wednesday and D6/Thursday will be monitored. ..Thornton.. 02/17/2024 ...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 0351 PM CST Sat Feb 17 2024 Valid 191200Z - 251200Z Periods of dry and windy conditions will be possible through the extended period, with some drying of fuels anticipated across the southern High Plains (especially on D5/Wednesday). Fire weather highlights will largely depend on the status of fuels, which remain too marginal at this time for inclusion of probabilities within D3-8 period. On D3/Monday, a shortwave trough will enhance west-northwesterly flow aloft across central Rockies with lee trough development and locally dry/breezy conditions across the southern High Plains. By D4/Tuesday, midlevel west-southwesterly flow will further strengthen across the central/southern Rockies ahead of an approaching large-scale trough in the Pacific. Increasing downslope flow will produce dry/windy conditions across the southern High Plains. While drying has been observed in fuels across far western Texas, the overall marginal state of fuels across much of the southern Plains will preclude probabilities at this time. On D5/Wednesday, the Pacific trough will move inland across the western US, with enhanced flow aloft overspreading the southern Rockies. As a result, lee cyclogenesis will favor strong westerly surface winds and low RH across the southern High Plains. Poor recovery is likely Wednesday night into Thursday across southwestern and far western Texas, with breezy post frontal northwesterly flow overlapping elevated to critical relative humidity again D6/Thursday. Elevated to perhaps critical meteorological conditions are possible both D5/Wednesday and D6/Thursday. Confidence in supportive fuels (with mainly marginal fuels over the area) limits confidence in a Critical fire-weather event. Therefore, Critical probabilities have been withheld, though fuel trends leading up to D5/Wednesday and D6/Thursday will be monitored. ..Thornton.. 02/17/2024 ...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 0351 PM CST Sat Feb 17 2024 Valid 191200Z - 251200Z Periods of dry and windy conditions will be possible through the extended period, with some drying of fuels anticipated across the southern High Plains (especially on D5/Wednesday). Fire weather highlights will largely depend on the status of fuels, which remain too marginal at this time for inclusion of probabilities within D3-8 period. On D3/Monday, a shortwave trough will enhance west-northwesterly flow aloft across central Rockies with lee trough development and locally dry/breezy conditions across the southern High Plains. By D4/Tuesday, midlevel west-southwesterly flow will further strengthen across the central/southern Rockies ahead of an approaching large-scale trough in the Pacific. Increasing downslope flow will produce dry/windy conditions across the southern High Plains. While drying has been observed in fuels across far western Texas, the overall marginal state of fuels across much of the southern Plains will preclude probabilities at this time. On D5/Wednesday, the Pacific trough will move inland across the western US, with enhanced flow aloft overspreading the southern Rockies. As a result, lee cyclogenesis will favor strong westerly surface winds and low RH across the southern High Plains. Poor recovery is likely Wednesday night into Thursday across southwestern and far western Texas, with breezy post frontal northwesterly flow overlapping elevated to critical relative humidity again D6/Thursday. Elevated to perhaps critical meteorological conditions are possible both D5/Wednesday and D6/Thursday. Confidence in supportive fuels (with mainly marginal fuels over the area) limits confidence in a Critical fire-weather event. Therefore, Critical probabilities have been withheld, though fuel trends leading up to D5/Wednesday and D6/Thursday will be monitored. ..Thornton.. 02/17/2024 ...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 0351 PM CST Sat Feb 17 2024 Valid 191200Z - 251200Z Periods of dry and windy conditions will be possible through the extended period, with some drying of fuels anticipated across the southern High Plains (especially on D5/Wednesday). Fire weather highlights will largely depend on the status of fuels, which remain too marginal at this time for inclusion of probabilities within D3-8 period. On D3/Monday, a shortwave trough will enhance west-northwesterly flow aloft across central Rockies with lee trough development and locally dry/breezy conditions across the southern High Plains. By D4/Tuesday, midlevel west-southwesterly flow will further strengthen across the central/southern Rockies ahead of an approaching large-scale trough in the Pacific. Increasing downslope flow will produce dry/windy conditions across the southern High Plains. While drying has been observed in fuels across far western Texas, the overall marginal state of fuels across much of the southern Plains will preclude probabilities at this time. On D5/Wednesday, the Pacific trough will move inland across the western US, with enhanced flow aloft overspreading the southern Rockies. As a result, lee cyclogenesis will favor strong westerly surface winds and low RH across the southern High Plains. Poor recovery is likely Wednesday night into Thursday across southwestern and far western Texas, with breezy post frontal northwesterly flow overlapping elevated to critical relative humidity again D6/Thursday. Elevated to perhaps critical meteorological conditions are possible both D5/Wednesday and D6/Thursday. Confidence in supportive fuels (with mainly marginal fuels over the area) limits confidence in a Critical fire-weather event. Therefore, Critical probabilities have been withheld, though fuel trends leading up to D5/Wednesday and D6/Thursday will be monitored. ..Thornton.. 02/17/2024 ...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 0151 PM CST Sat Feb 17 2024 Valid 181200Z - 191200Z ...NO CRITICAL AREAS... No updates are needed to the D2 Fire Weather Outlook. See previous discussion below. ..Thornton.. 02/17/2024 .PREV DISCUSSION... /ISSUED 0112 AM CST Sat Feb 17 2024/ ...Synopsis... Limited fire weather concerns are expected for Sunday across the country. Short and medium-range guidance show reasonably good agreement in depicting the gradual breakdown of the upper-level ridge observed over the Pacific Northwest through the next 48 hours. As this occurs, zonal flow over the central/northern Rockies will strengthen, resulting in lee troughing from eastern WY southward into the southern High Plains. Consequently, westerly downslope winds are forecast to increase through the day to around 15-20 mph, resulting in RH reductions into the 20-35% range. Some high-res solutions suggest that areas of elevated fire weather conditions are possible in the immediate lee of the northern/central Rockies from east-central WY to eastern NM. However, confidence in the coverage/duration of such conditions - including favorable overlap with sufficiently dry fuels - remains low, owing to spread in diurnal RH minimum forecasts and poor fuel status. ...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 0151 PM CST Sat Feb 17 2024 Valid 181200Z - 191200Z ...NO CRITICAL AREAS... No updates are needed to the D2 Fire Weather Outlook. See previous discussion below. ..Thornton.. 02/17/2024 .PREV DISCUSSION... /ISSUED 0112 AM CST Sat Feb 17 2024/ ...Synopsis... Limited fire weather concerns are expected for Sunday across the country. Short and medium-range guidance show reasonably good agreement in depicting the gradual breakdown of the upper-level ridge observed over the Pacific Northwest through the next 48 hours. As this occurs, zonal flow over the central/northern Rockies will strengthen, resulting in lee troughing from eastern WY southward into the southern High Plains. Consequently, westerly downslope winds are forecast to increase through the day to around 15-20 mph, resulting in RH reductions into the 20-35% range. Some high-res solutions suggest that areas of elevated fire weather conditions are possible in the immediate lee of the northern/central Rockies from east-central WY to eastern NM. However, confidence in the coverage/duration of such conditions - including favorable overlap with sufficiently dry fuels - remains low, owing to spread in diurnal RH minimum forecasts and poor fuel status. ...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 0151 PM CST Sat Feb 17 2024 Valid 181200Z - 191200Z ...NO CRITICAL AREAS... No updates are needed to the D2 Fire Weather Outlook. See previous discussion below. ..Thornton.. 02/17/2024 .PREV DISCUSSION... /ISSUED 0112 AM CST Sat Feb 17 2024/ ...Synopsis... Limited fire weather concerns are expected for Sunday across the country. Short and medium-range guidance show reasonably good agreement in depicting the gradual breakdown of the upper-level ridge observed over the Pacific Northwest through the next 48 hours. As this occurs, zonal flow over the central/northern Rockies will strengthen, resulting in lee troughing from eastern WY southward into the southern High Plains. Consequently, westerly downslope winds are forecast to increase through the day to around 15-20 mph, resulting in RH reductions into the 20-35% range. Some high-res solutions suggest that areas of elevated fire weather conditions are possible in the immediate lee of the northern/central Rockies from east-central WY to eastern NM. However, confidence in the coverage/duration of such conditions - including favorable overlap with sufficiently dry fuels - remains low, owing to spread in diurnal RH minimum forecasts and poor fuel status. ...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 0151 PM CST Sat Feb 17 2024 Valid 181200Z - 191200Z ...NO CRITICAL AREAS... No updates are needed to the D2 Fire Weather Outlook. See previous discussion below. ..Thornton.. 02/17/2024 .PREV DISCUSSION... /ISSUED 0112 AM CST Sat Feb 17 2024/ ...Synopsis... Limited fire weather concerns are expected for Sunday across the country. Short and medium-range guidance show reasonably good agreement in depicting the gradual breakdown of the upper-level ridge observed over the Pacific Northwest through the next 48 hours. As this occurs, zonal flow over the central/northern Rockies will strengthen, resulting in lee troughing from eastern WY southward into the southern High Plains. Consequently, westerly downslope winds are forecast to increase through the day to around 15-20 mph, resulting in RH reductions into the 20-35% range. Some high-res solutions suggest that areas of elevated fire weather conditions are possible in the immediate lee of the northern/central Rockies from east-central WY to eastern NM. However, confidence in the coverage/duration of such conditions - including favorable overlap with sufficiently dry fuels - remains low, owing to spread in diurnal RH minimum forecasts and poor fuel status. ...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 0151 PM CST Sat Feb 17 2024 Valid 181200Z - 191200Z ...NO CRITICAL AREAS... No updates are needed to the D2 Fire Weather Outlook. See previous discussion below. ..Thornton.. 02/17/2024 .PREV DISCUSSION... /ISSUED 0112 AM CST Sat Feb 17 2024/ ...Synopsis... Limited fire weather concerns are expected for Sunday across the country. Short and medium-range guidance show reasonably good agreement in depicting the gradual breakdown of the upper-level ridge observed over the Pacific Northwest through the next 48 hours. As this occurs, zonal flow over the central/northern Rockies will strengthen, resulting in lee troughing from eastern WY southward into the southern High Plains. Consequently, westerly downslope winds are forecast to increase through the day to around 15-20 mph, resulting in RH reductions into the 20-35% range. Some high-res solutions suggest that areas of elevated fire weather conditions are possible in the immediate lee of the northern/central Rockies from east-central WY to eastern NM. However, confidence in the coverage/duration of such conditions - including favorable overlap with sufficiently dry fuels - remains low, owing to spread in diurnal RH minimum forecasts and poor fuel status. ...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 0151 PM CST Sat Feb 17 2024 Valid 181200Z - 191200Z ...NO CRITICAL AREAS... No updates are needed to the D2 Fire Weather Outlook. See previous discussion below. ..Thornton.. 02/17/2024 .PREV DISCUSSION... /ISSUED 0112 AM CST Sat Feb 17 2024/ ...Synopsis... Limited fire weather concerns are expected for Sunday across the country. Short and medium-range guidance show reasonably good agreement in depicting the gradual breakdown of the upper-level ridge observed over the Pacific Northwest through the next 48 hours. As this occurs, zonal flow over the central/northern Rockies will strengthen, resulting in lee troughing from eastern WY southward into the southern High Plains. Consequently, westerly downslope winds are forecast to increase through the day to around 15-20 mph, resulting in RH reductions into the 20-35% range. Some high-res solutions suggest that areas of elevated fire weather conditions are possible in the immediate lee of the northern/central Rockies from east-central WY to eastern NM. However, confidence in the coverage/duration of such conditions - including favorable overlap with sufficiently dry fuels - remains low, owing to spread in diurnal RH minimum forecasts and poor fuel status. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

MD 0150 CONCERNING SNOW SQUALL FOR PORTIONS OF WESTERN INTO EASTERN NEW YORK...EXTREME NORTHEAST OHIO...WESTERN INTO CENTRAL PENNSYLVANIA
Mesoscale Discussion 0150 NWS Storm Prediction Center Norman OK 1034 AM CST Sat Feb 17 2024 Areas affected...portions of western into eastern New York...extreme northeast Ohio...western into central Pennsylvania Concerning...Snow Squall Valid 171634Z - 172130Z SUMMARY...Snow showers should persist over the next several hours in tandem with diurnal heating across much of central NY into PA. Brief bursts of heavier snow may support very localized reductions in visibility. DISCUSSION...Boundary-layer heating is supporting the generation of steep (i.e. 8 C/km) low-level lapse rates, which is encouraging the generation and sustenance of scattered, low-topped convective snow showers over portions of central NY into PA. A mid-level trough is traversing the region, providing enough deep-layer ascent for continued snow-shower development through the afternoon. Based on reports over the last couple of hours, brief bouts of reduced visibility (as low as a quarter to half a mile) have occurred. Given the convective nature of these snow showers, brief and localized bursts of heavier snow will remain possible through the afternoon on an isolated basis, until the steep low-level lapse rates diminish later today. ..Squitieri.. 02/17/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...OKX...ALY...PHI...BGM...BUF...CTP...PBZ...CLE... LAT...LON 41558151 42407897 43187649 43017443 42367360 41747404 41157536 40567633 40307734 40147827 40277914 40507992 41558151 Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0141 PM CST Sat Feb 17 2024 Valid 172000Z - 181200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Minimal thunderstorm coverage is forecast across the continental U.S. through tonight. No changes to the ongoing outlook for today, with minimal thunderstorm activity forecast. The greatest probability of a few weak thunderstorms will be over northern CA this evening as lift and cooling aloft increase with the upper trough. ..Jewell.. 02/17/2024 .PREV DISCUSSION... /ISSUED 1031 AM CST Sat Feb 17 2024/ Cool, relatively dry, and stable conditions will prevail across most of the nation today, with only two small areas seeing a risk of isolated thunderstorms. Scattered afternoon and evening thunderstorms will be possible over portions of northern CA as a large upper trough approaches the region, steepening lapse rates and providing large scale lift. Other isolated thunderstorms may develop tonight along the southwest coast of the FL peninsula as a cold front sags across the region, but activity should be quite sparse. No severe storms are anticipated today. Read more

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0141 PM CST Sat Feb 17 2024 Valid 172000Z - 181200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Minimal thunderstorm coverage is forecast across the continental U.S. through tonight. No changes to the ongoing outlook for today, with minimal thunderstorm activity forecast. The greatest probability of a few weak thunderstorms will be over northern CA this evening as lift and cooling aloft increase with the upper trough. ..Jewell.. 02/17/2024 .PREV DISCUSSION... /ISSUED 1031 AM CST Sat Feb 17 2024/ Cool, relatively dry, and stable conditions will prevail across most of the nation today, with only two small areas seeing a risk of isolated thunderstorms. Scattered afternoon and evening thunderstorms will be possible over portions of northern CA as a large upper trough approaches the region, steepening lapse rates and providing large scale lift. Other isolated thunderstorms may develop tonight along the southwest coast of the FL peninsula as a cold front sags across the region, but activity should be quite sparse. No severe storms are anticipated today. Read more