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WW 0240 Status Updates
STATUS REPORT ON WW 240 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 W CHA TO 25 SSW TYS TO 15 NNE HSS TO 15 S TRI TO 30 SSE TRI. ..HART..05/09/25 ATTN...WFO...JKL...MRX...RLX... STATUS REPORT FOR WS 240 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NCC039-043-090240- NC . NORTH CAROLINA COUNTIES INCLUDED ARE CHEROKEE CLAY TNC011-019-029-059-065-115-139-171-179-090240- TN . TENNESSEE COUNTIES INCLUDED ARE BRADLEY CARTER COCKE GREENE HAMILTON MARION POLK UNICOI WASHINGTON THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 0240 Status Updates
STATUS REPORT ON WW 240 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 W CHA TO 25 SSW TYS TO 15 NNE HSS TO 15 S TRI TO 30 SSE TRI. ..HART..05/09/25 ATTN...WFO...JKL...MRX...RLX... STATUS REPORT FOR WS 240 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NCC039-043-090240- NC . NORTH CAROLINA COUNTIES INCLUDED ARE CHEROKEE CLAY TNC011-019-029-059-065-115-139-171-179-090240- TN . TENNESSEE COUNTIES INCLUDED ARE BRADLEY CARTER COCKE GREENE HAMILTON MARION POLK UNICOI WASHINGTON THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 0240 Status Updates
STATUS REPORT ON WW 240 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 W CHA TO 25 SSW TYS TO 15 NNE HSS TO 15 S TRI TO 30 SSE TRI. ..HART..05/09/25 ATTN...WFO...JKL...MRX...RLX... STATUS REPORT FOR WS 240 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NCC039-043-090240- NC . NORTH CAROLINA COUNTIES INCLUDED ARE CHEROKEE CLAY TNC011-019-029-059-065-115-139-171-179-090240- TN . TENNESSEE COUNTIES INCLUDED ARE BRADLEY CARTER COCKE GREENE HAMILTON MARION POLK UNICOI WASHINGTON THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 0240 Status Updates
STATUS REPORT ON WW 240 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 W CHA TO 25 SSW TYS TO 15 NNE HSS TO 15 S TRI TO 30 SSE TRI. ..HART..05/09/25 ATTN...WFO...JKL...MRX...RLX... STATUS REPORT FOR WS 240 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NCC039-043-090240- NC . NORTH CAROLINA COUNTIES INCLUDED ARE CHEROKEE CLAY TNC011-019-029-059-065-115-139-171-179-090240- TN . TENNESSEE COUNTIES INCLUDED ARE BRADLEY CARTER COCKE GREENE HAMILTON MARION POLK UNICOI WASHINGTON THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES. Read more

WW 240 SEVERE TSTM KY NC TN VA 081930Z - 090300Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 240 NWS Storm Prediction Center Norman OK 330 PM EDT Thu May 8 2025 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Eastern Kentucky Far Southwest North Carolina Eastern Tennessee Far Southwest Virginia * Effective this Thursday afternoon and evening from 330 PM until 1100 PM EDT. * Primary threats include... Scattered large hail likely with isolated very large hail events to 2 inches in diameter possible Scattered damaging wind gusts to 70 mph possible SUMMARY...Thunderstorms will continue to intensify this afternoon and evening while moving eastward and posing a threat for large hail up to 1-2 inches in diameter. Scattered damaging winds with peak gusts to 60-70 mph should also occur with any thunderstorm clusters that can develop. The severe thunderstorm watch area is approximately along and 65 statute miles east and west of a line from 85 miles east northeast of London KY to 10 miles east southeast of Chattanooga TN. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU0). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 238...WW 239... AVIATION...A few severe thunderstorms with hail surface and aloft to 2 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 27030. ...Gleason Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0801 PM CDT Thu May 08 2025 Valid 090100Z - 091200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF SOUTH TEXAS...THE TENNESSEE VALLEY...SOUTHERN APPALACHIANS AND SOUTHEAST... ...SUMMARY... Scattered thunderstorms with severe wind gusts and large hail will continue this evening over parts of the Tennessee Valley, southern Appalachians and Southeast. Severe wind gusts and large hail are also expected across parts of south Texas, where hailstones of greater than 2 inches in diameter will be possible. ...Tennessee Valley/Southern Appalachians/Southeast... Latest water vapor imagery shows a positively-tilted mid-level trough over the Ohio Valley, with an east-to-west oriented plume of mid-level moisture from the mid Mississippi Valley into the south and central Appalachians. At the surface, a quasi-stationary front is analyzed in the Ohio Valley. To the south of the front over the Ohio and Tennessee Valleys, surface dewpoints are in the mid 50s to the mid 60s F. The RAP has moderate instability in place from the Tennessee Valley eastward into the southern Appalachians and southward into the Gulf Coast states. Scattered thunderstorms are ongoing, concentrated along the northern edge of moderate instability from Kentucky and Tennessee eastward into western North Carolina. RAP forecast soundings in this vicinity early this evening have 0-6 km shear ranging from 35 to 45 knots, mostly due to speed shear in the mid-levels. This, combined with 0-3 km lapse rates in the 7.5 to 8 C/km range, should be favorable for severe gusts with the stronger cells. The shear will also support supercell development with large hail possible. The severe threat should become more isolated later this evening as instability decreases across the region. ...South Texas... A shortwave trough, with multiple vorticity maximums, appears to be located in the lower Rio Grande Valley, according to water vapor imagery. Scattered strong to severe thunderstorms are ongoing ahead of the trough from near Laredo extending eastward onto the Texas Coastal Plain. From the storms southward, moderate instability is analyzed by the RAP, with MLCAPE estimated to be in the 1000 to 2000 J/kg range. The airmass is very moist with surface dewpoints in the lower to mid 70s F. Within this moist airmass, RAP forecast soundings early this evening have 0-6 km shear near 50 knots, with 700-500 mb lapse rates near 7.5 C/km. This environment will support supercells with large hail, and hailstones greater than 2 inches in diameter will be possible within the more intense cores. Isolated severe gusts may also occur within the stronger downdrafts. The ongoing severe storms will track southeastward across the remainder of south Texas this evening...see MCD 749. ..Broyles.. 05/09/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0801 PM CDT Thu May 08 2025 Valid 090100Z - 091200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF SOUTH TEXAS...THE TENNESSEE VALLEY...SOUTHERN APPALACHIANS AND SOUTHEAST... ...SUMMARY... Scattered thunderstorms with severe wind gusts and large hail will continue this evening over parts of the Tennessee Valley, southern Appalachians and Southeast. Severe wind gusts and large hail are also expected across parts of south Texas, where hailstones of greater than 2 inches in diameter will be possible. ...Tennessee Valley/Southern Appalachians/Southeast... Latest water vapor imagery shows a positively-tilted mid-level trough over the Ohio Valley, with an east-to-west oriented plume of mid-level moisture from the mid Mississippi Valley into the south and central Appalachians. At the surface, a quasi-stationary front is analyzed in the Ohio Valley. To the south of the front over the Ohio and Tennessee Valleys, surface dewpoints are in the mid 50s to the mid 60s F. The RAP has moderate instability in place from the Tennessee Valley eastward into the southern Appalachians and southward into the Gulf Coast states. Scattered thunderstorms are ongoing, concentrated along the northern edge of moderate instability from Kentucky and Tennessee eastward into western North Carolina. RAP forecast soundings in this vicinity early this evening have 0-6 km shear ranging from 35 to 45 knots, mostly due to speed shear in the mid-levels. This, combined with 0-3 km lapse rates in the 7.5 to 8 C/km range, should be favorable for severe gusts with the stronger cells. The shear will also support supercell development with large hail possible. The severe threat should become more isolated later this evening as instability decreases across the region. ...South Texas... A shortwave trough, with multiple vorticity maximums, appears to be located in the lower Rio Grande Valley, according to water vapor imagery. Scattered strong to severe thunderstorms are ongoing ahead of the trough from near Laredo extending eastward onto the Texas Coastal Plain. From the storms southward, moderate instability is analyzed by the RAP, with MLCAPE estimated to be in the 1000 to 2000 J/kg range. The airmass is very moist with surface dewpoints in the lower to mid 70s F. Within this moist airmass, RAP forecast soundings early this evening have 0-6 km shear near 50 knots, with 700-500 mb lapse rates near 7.5 C/km. This environment will support supercells with large hail, and hailstones greater than 2 inches in diameter will be possible within the more intense cores. Isolated severe gusts may also occur within the stronger downdrafts. The ongoing severe storms will track southeastward across the remainder of south Texas this evening...see MCD 749. ..Broyles.. 05/09/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0801 PM CDT Thu May 08 2025 Valid 090100Z - 091200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF SOUTH TEXAS...THE TENNESSEE VALLEY...SOUTHERN APPALACHIANS AND SOUTHEAST... ...SUMMARY... Scattered thunderstorms with severe wind gusts and large hail will continue this evening over parts of the Tennessee Valley, southern Appalachians and Southeast. Severe wind gusts and large hail are also expected across parts of south Texas, where hailstones of greater than 2 inches in diameter will be possible. ...Tennessee Valley/Southern Appalachians/Southeast... Latest water vapor imagery shows a positively-tilted mid-level trough over the Ohio Valley, with an east-to-west oriented plume of mid-level moisture from the mid Mississippi Valley into the south and central Appalachians. At the surface, a quasi-stationary front is analyzed in the Ohio Valley. To the south of the front over the Ohio and Tennessee Valleys, surface dewpoints are in the mid 50s to the mid 60s F. The RAP has moderate instability in place from the Tennessee Valley eastward into the southern Appalachians and southward into the Gulf Coast states. Scattered thunderstorms are ongoing, concentrated along the northern edge of moderate instability from Kentucky and Tennessee eastward into western North Carolina. RAP forecast soundings in this vicinity early this evening have 0-6 km shear ranging from 35 to 45 knots, mostly due to speed shear in the mid-levels. This, combined with 0-3 km lapse rates in the 7.5 to 8 C/km range, should be favorable for severe gusts with the stronger cells. The shear will also support supercell development with large hail possible. The severe threat should become more isolated later this evening as instability decreases across the region. ...South Texas... A shortwave trough, with multiple vorticity maximums, appears to be located in the lower Rio Grande Valley, according to water vapor imagery. Scattered strong to severe thunderstorms are ongoing ahead of the trough from near Laredo extending eastward onto the Texas Coastal Plain. From the storms southward, moderate instability is analyzed by the RAP, with MLCAPE estimated to be in the 1000 to 2000 J/kg range. The airmass is very moist with surface dewpoints in the lower to mid 70s F. Within this moist airmass, RAP forecast soundings early this evening have 0-6 km shear near 50 knots, with 700-500 mb lapse rates near 7.5 C/km. This environment will support supercells with large hail, and hailstones greater than 2 inches in diameter will be possible within the more intense cores. Isolated severe gusts may also occur within the stronger downdrafts. The ongoing severe storms will track southeastward across the remainder of south Texas this evening...see MCD 749. ..Broyles.. 05/09/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0801 PM CDT Thu May 08 2025 Valid 090100Z - 091200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF SOUTH TEXAS...THE TENNESSEE VALLEY...SOUTHERN APPALACHIANS AND SOUTHEAST... ...SUMMARY... Scattered thunderstorms with severe wind gusts and large hail will continue this evening over parts of the Tennessee Valley, southern Appalachians and Southeast. Severe wind gusts and large hail are also expected across parts of south Texas, where hailstones of greater than 2 inches in diameter will be possible. ...Tennessee Valley/Southern Appalachians/Southeast... Latest water vapor imagery shows a positively-tilted mid-level trough over the Ohio Valley, with an east-to-west oriented plume of mid-level moisture from the mid Mississippi Valley into the south and central Appalachians. At the surface, a quasi-stationary front is analyzed in the Ohio Valley. To the south of the front over the Ohio and Tennessee Valleys, surface dewpoints are in the mid 50s to the mid 60s F. The RAP has moderate instability in place from the Tennessee Valley eastward into the southern Appalachians and southward into the Gulf Coast states. Scattered thunderstorms are ongoing, concentrated along the northern edge of moderate instability from Kentucky and Tennessee eastward into western North Carolina. RAP forecast soundings in this vicinity early this evening have 0-6 km shear ranging from 35 to 45 knots, mostly due to speed shear in the mid-levels. This, combined with 0-3 km lapse rates in the 7.5 to 8 C/km range, should be favorable for severe gusts with the stronger cells. The shear will also support supercell development with large hail possible. The severe threat should become more isolated later this evening as instability decreases across the region. ...South Texas... A shortwave trough, with multiple vorticity maximums, appears to be located in the lower Rio Grande Valley, according to water vapor imagery. Scattered strong to severe thunderstorms are ongoing ahead of the trough from near Laredo extending eastward onto the Texas Coastal Plain. From the storms southward, moderate instability is analyzed by the RAP, with MLCAPE estimated to be in the 1000 to 2000 J/kg range. The airmass is very moist with surface dewpoints in the lower to mid 70s F. Within this moist airmass, RAP forecast soundings early this evening have 0-6 km shear near 50 knots, with 700-500 mb lapse rates near 7.5 C/km. This environment will support supercells with large hail, and hailstones greater than 2 inches in diameter will be possible within the more intense cores. Isolated severe gusts may also occur within the stronger downdrafts. The ongoing severe storms will track southeastward across the remainder of south Texas this evening...see MCD 749. ..Broyles.. 05/09/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0801 PM CDT Thu May 08 2025 Valid 090100Z - 091200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF SOUTH TEXAS...THE TENNESSEE VALLEY...SOUTHERN APPALACHIANS AND SOUTHEAST... ...SUMMARY... Scattered thunderstorms with severe wind gusts and large hail will continue this evening over parts of the Tennessee Valley, southern Appalachians and Southeast. Severe wind gusts and large hail are also expected across parts of south Texas, where hailstones of greater than 2 inches in diameter will be possible. ...Tennessee Valley/Southern Appalachians/Southeast... Latest water vapor imagery shows a positively-tilted mid-level trough over the Ohio Valley, with an east-to-west oriented plume of mid-level moisture from the mid Mississippi Valley into the south and central Appalachians. At the surface, a quasi-stationary front is analyzed in the Ohio Valley. To the south of the front over the Ohio and Tennessee Valleys, surface dewpoints are in the mid 50s to the mid 60s F. The RAP has moderate instability in place from the Tennessee Valley eastward into the southern Appalachians and southward into the Gulf Coast states. Scattered thunderstorms are ongoing, concentrated along the northern edge of moderate instability from Kentucky and Tennessee eastward into western North Carolina. RAP forecast soundings in this vicinity early this evening have 0-6 km shear ranging from 35 to 45 knots, mostly due to speed shear in the mid-levels. This, combined with 0-3 km lapse rates in the 7.5 to 8 C/km range, should be favorable for severe gusts with the stronger cells. The shear will also support supercell development with large hail possible. The severe threat should become more isolated later this evening as instability decreases across the region. ...South Texas... A shortwave trough, with multiple vorticity maximums, appears to be located in the lower Rio Grande Valley, according to water vapor imagery. Scattered strong to severe thunderstorms are ongoing ahead of the trough from near Laredo extending eastward onto the Texas Coastal Plain. From the storms southward, moderate instability is analyzed by the RAP, with MLCAPE estimated to be in the 1000 to 2000 J/kg range. The airmass is very moist with surface dewpoints in the lower to mid 70s F. Within this moist airmass, RAP forecast soundings early this evening have 0-6 km shear near 50 knots, with 700-500 mb lapse rates near 7.5 C/km. This environment will support supercells with large hail, and hailstones greater than 2 inches in diameter will be possible within the more intense cores. Isolated severe gusts may also occur within the stronger downdrafts. The ongoing severe storms will track southeastward across the remainder of south Texas this evening...see MCD 749. ..Broyles.. 05/09/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0801 PM CDT Thu May 08 2025 Valid 090100Z - 091200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF SOUTH TEXAS...THE TENNESSEE VALLEY...SOUTHERN APPALACHIANS AND SOUTHEAST... ...SUMMARY... Scattered thunderstorms with severe wind gusts and large hail will continue this evening over parts of the Tennessee Valley, southern Appalachians and Southeast. Severe wind gusts and large hail are also expected across parts of south Texas, where hailstones of greater than 2 inches in diameter will be possible. ...Tennessee Valley/Southern Appalachians/Southeast... Latest water vapor imagery shows a positively-tilted mid-level trough over the Ohio Valley, with an east-to-west oriented plume of mid-level moisture from the mid Mississippi Valley into the south and central Appalachians. At the surface, a quasi-stationary front is analyzed in the Ohio Valley. To the south of the front over the Ohio and Tennessee Valleys, surface dewpoints are in the mid 50s to the mid 60s F. The RAP has moderate instability in place from the Tennessee Valley eastward into the southern Appalachians and southward into the Gulf Coast states. Scattered thunderstorms are ongoing, concentrated along the northern edge of moderate instability from Kentucky and Tennessee eastward into western North Carolina. RAP forecast soundings in this vicinity early this evening have 0-6 km shear ranging from 35 to 45 knots, mostly due to speed shear in the mid-levels. This, combined with 0-3 km lapse rates in the 7.5 to 8 C/km range, should be favorable for severe gusts with the stronger cells. The shear will also support supercell development with large hail possible. The severe threat should become more isolated later this evening as instability decreases across the region. ...South Texas... A shortwave trough, with multiple vorticity maximums, appears to be located in the lower Rio Grande Valley, according to water vapor imagery. Scattered strong to severe thunderstorms are ongoing ahead of the trough from near Laredo extending eastward onto the Texas Coastal Plain. From the storms southward, moderate instability is analyzed by the RAP, with MLCAPE estimated to be in the 1000 to 2000 J/kg range. The airmass is very moist with surface dewpoints in the lower to mid 70s F. Within this moist airmass, RAP forecast soundings early this evening have 0-6 km shear near 50 knots, with 700-500 mb lapse rates near 7.5 C/km. This environment will support supercells with large hail, and hailstones greater than 2 inches in diameter will be possible within the more intense cores. Isolated severe gusts may also occur within the stronger downdrafts. The ongoing severe storms will track southeastward across the remainder of south Texas this evening...see MCD 749. ..Broyles.. 05/09/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0801 PM CDT Thu May 08 2025 Valid 090100Z - 091200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF SOUTH TEXAS...THE TENNESSEE VALLEY...SOUTHERN APPALACHIANS AND SOUTHEAST... ...SUMMARY... Scattered thunderstorms with severe wind gusts and large hail will continue this evening over parts of the Tennessee Valley, southern Appalachians and Southeast. Severe wind gusts and large hail are also expected across parts of south Texas, where hailstones of greater than 2 inches in diameter will be possible. ...Tennessee Valley/Southern Appalachians/Southeast... Latest water vapor imagery shows a positively-tilted mid-level trough over the Ohio Valley, with an east-to-west oriented plume of mid-level moisture from the mid Mississippi Valley into the south and central Appalachians. At the surface, a quasi-stationary front is analyzed in the Ohio Valley. To the south of the front over the Ohio and Tennessee Valleys, surface dewpoints are in the mid 50s to the mid 60s F. The RAP has moderate instability in place from the Tennessee Valley eastward into the southern Appalachians and southward into the Gulf Coast states. Scattered thunderstorms are ongoing, concentrated along the northern edge of moderate instability from Kentucky and Tennessee eastward into western North Carolina. RAP forecast soundings in this vicinity early this evening have 0-6 km shear ranging from 35 to 45 knots, mostly due to speed shear in the mid-levels. This, combined with 0-3 km lapse rates in the 7.5 to 8 C/km range, should be favorable for severe gusts with the stronger cells. The shear will also support supercell development with large hail possible. The severe threat should become more isolated later this evening as instability decreases across the region. ...South Texas... A shortwave trough, with multiple vorticity maximums, appears to be located in the lower Rio Grande Valley, according to water vapor imagery. Scattered strong to severe thunderstorms are ongoing ahead of the trough from near Laredo extending eastward onto the Texas Coastal Plain. From the storms southward, moderate instability is analyzed by the RAP, with MLCAPE estimated to be in the 1000 to 2000 J/kg range. The airmass is very moist with surface dewpoints in the lower to mid 70s F. Within this moist airmass, RAP forecast soundings early this evening have 0-6 km shear near 50 knots, with 700-500 mb lapse rates near 7.5 C/km. This environment will support supercells with large hail, and hailstones greater than 2 inches in diameter will be possible within the more intense cores. Isolated severe gusts may also occur within the stronger downdrafts. The ongoing severe storms will track southeastward across the remainder of south Texas this evening...see MCD 749. ..Broyles.. 05/09/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0801 PM CDT Thu May 08 2025 Valid 090100Z - 091200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF SOUTH TEXAS...THE TENNESSEE VALLEY...SOUTHERN APPALACHIANS AND SOUTHEAST... ...SUMMARY... Scattered thunderstorms with severe wind gusts and large hail will continue this evening over parts of the Tennessee Valley, southern Appalachians and Southeast. Severe wind gusts and large hail are also expected across parts of south Texas, where hailstones of greater than 2 inches in diameter will be possible. ...Tennessee Valley/Southern Appalachians/Southeast... Latest water vapor imagery shows a positively-tilted mid-level trough over the Ohio Valley, with an east-to-west oriented plume of mid-level moisture from the mid Mississippi Valley into the south and central Appalachians. At the surface, a quasi-stationary front is analyzed in the Ohio Valley. To the south of the front over the Ohio and Tennessee Valleys, surface dewpoints are in the mid 50s to the mid 60s F. The RAP has moderate instability in place from the Tennessee Valley eastward into the southern Appalachians and southward into the Gulf Coast states. Scattered thunderstorms are ongoing, concentrated along the northern edge of moderate instability from Kentucky and Tennessee eastward into western North Carolina. RAP forecast soundings in this vicinity early this evening have 0-6 km shear ranging from 35 to 45 knots, mostly due to speed shear in the mid-levels. This, combined with 0-3 km lapse rates in the 7.5 to 8 C/km range, should be favorable for severe gusts with the stronger cells. The shear will also support supercell development with large hail possible. The severe threat should become more isolated later this evening as instability decreases across the region. ...South Texas... A shortwave trough, with multiple vorticity maximums, appears to be located in the lower Rio Grande Valley, according to water vapor imagery. Scattered strong to severe thunderstorms are ongoing ahead of the trough from near Laredo extending eastward onto the Texas Coastal Plain. From the storms southward, moderate instability is analyzed by the RAP, with MLCAPE estimated to be in the 1000 to 2000 J/kg range. The airmass is very moist with surface dewpoints in the lower to mid 70s F. Within this moist airmass, RAP forecast soundings early this evening have 0-6 km shear near 50 knots, with 700-500 mb lapse rates near 7.5 C/km. This environment will support supercells with large hail, and hailstones greater than 2 inches in diameter will be possible within the more intense cores. Isolated severe gusts may also occur within the stronger downdrafts. The ongoing severe storms will track southeastward across the remainder of south Texas this evening...see MCD 749. ..Broyles.. 05/09/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0801 PM CDT Thu May 08 2025 Valid 090100Z - 091200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF SOUTH TEXAS...THE TENNESSEE VALLEY...SOUTHERN APPALACHIANS AND SOUTHEAST... ...SUMMARY... Scattered thunderstorms with severe wind gusts and large hail will continue this evening over parts of the Tennessee Valley, southern Appalachians and Southeast. Severe wind gusts and large hail are also expected across parts of south Texas, where hailstones of greater than 2 inches in diameter will be possible. ...Tennessee Valley/Southern Appalachians/Southeast... Latest water vapor imagery shows a positively-tilted mid-level trough over the Ohio Valley, with an east-to-west oriented plume of mid-level moisture from the mid Mississippi Valley into the south and central Appalachians. At the surface, a quasi-stationary front is analyzed in the Ohio Valley. To the south of the front over the Ohio and Tennessee Valleys, surface dewpoints are in the mid 50s to the mid 60s F. The RAP has moderate instability in place from the Tennessee Valley eastward into the southern Appalachians and southward into the Gulf Coast states. Scattered thunderstorms are ongoing, concentrated along the northern edge of moderate instability from Kentucky and Tennessee eastward into western North Carolina. RAP forecast soundings in this vicinity early this evening have 0-6 km shear ranging from 35 to 45 knots, mostly due to speed shear in the mid-levels. This, combined with 0-3 km lapse rates in the 7.5 to 8 C/km range, should be favorable for severe gusts with the stronger cells. The shear will also support supercell development with large hail possible. The severe threat should become more isolated later this evening as instability decreases across the region. ...South Texas... A shortwave trough, with multiple vorticity maximums, appears to be located in the lower Rio Grande Valley, according to water vapor imagery. Scattered strong to severe thunderstorms are ongoing ahead of the trough from near Laredo extending eastward onto the Texas Coastal Plain. From the storms southward, moderate instability is analyzed by the RAP, with MLCAPE estimated to be in the 1000 to 2000 J/kg range. The airmass is very moist with surface dewpoints in the lower to mid 70s F. Within this moist airmass, RAP forecast soundings early this evening have 0-6 km shear near 50 knots, with 700-500 mb lapse rates near 7.5 C/km. This environment will support supercells with large hail, and hailstones greater than 2 inches in diameter will be possible within the more intense cores. Isolated severe gusts may also occur within the stronger downdrafts. The ongoing severe storms will track southeastward across the remainder of south Texas this evening...see MCD 749. ..Broyles.. 05/09/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0801 PM CDT Thu May 08 2025 Valid 090100Z - 091200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF SOUTH TEXAS...THE TENNESSEE VALLEY...SOUTHERN APPALACHIANS AND SOUTHEAST... ...SUMMARY... Scattered thunderstorms with severe wind gusts and large hail will continue this evening over parts of the Tennessee Valley, southern Appalachians and Southeast. Severe wind gusts and large hail are also expected across parts of south Texas, where hailstones of greater than 2 inches in diameter will be possible. ...Tennessee Valley/Southern Appalachians/Southeast... Latest water vapor imagery shows a positively-tilted mid-level trough over the Ohio Valley, with an east-to-west oriented plume of mid-level moisture from the mid Mississippi Valley into the south and central Appalachians. At the surface, a quasi-stationary front is analyzed in the Ohio Valley. To the south of the front over the Ohio and Tennessee Valleys, surface dewpoints are in the mid 50s to the mid 60s F. The RAP has moderate instability in place from the Tennessee Valley eastward into the southern Appalachians and southward into the Gulf Coast states. Scattered thunderstorms are ongoing, concentrated along the northern edge of moderate instability from Kentucky and Tennessee eastward into western North Carolina. RAP forecast soundings in this vicinity early this evening have 0-6 km shear ranging from 35 to 45 knots, mostly due to speed shear in the mid-levels. This, combined with 0-3 km lapse rates in the 7.5 to 8 C/km range, should be favorable for severe gusts with the stronger cells. The shear will also support supercell development with large hail possible. The severe threat should become more isolated later this evening as instability decreases across the region. ...South Texas... A shortwave trough, with multiple vorticity maximums, appears to be located in the lower Rio Grande Valley, according to water vapor imagery. Scattered strong to severe thunderstorms are ongoing ahead of the trough from near Laredo extending eastward onto the Texas Coastal Plain. From the storms southward, moderate instability is analyzed by the RAP, with MLCAPE estimated to be in the 1000 to 2000 J/kg range. The airmass is very moist with surface dewpoints in the lower to mid 70s F. Within this moist airmass, RAP forecast soundings early this evening have 0-6 km shear near 50 knots, with 700-500 mb lapse rates near 7.5 C/km. This environment will support supercells with large hail, and hailstones greater than 2 inches in diameter will be possible within the more intense cores. Isolated severe gusts may also occur within the stronger downdrafts. The ongoing severe storms will track southeastward across the remainder of south Texas this evening...see MCD 749. ..Broyles.. 05/09/2025 Read more

SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0801 PM CDT Thu May 08 2025 Valid 090100Z - 091200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF SOUTH TEXAS...THE TENNESSEE VALLEY...SOUTHERN APPALACHIANS AND SOUTHEAST... ...SUMMARY... Scattered thunderstorms with severe wind gusts and large hail will continue this evening over parts of the Tennessee Valley, southern Appalachians and Southeast. Severe wind gusts and large hail are also expected across parts of south Texas, where hailstones of greater than 2 inches in diameter will be possible. ...Tennessee Valley/Southern Appalachians/Southeast... Latest water vapor imagery shows a positively-tilted mid-level trough over the Ohio Valley, with an east-to-west oriented plume of mid-level moisture from the mid Mississippi Valley into the south and central Appalachians. At the surface, a quasi-stationary front is analyzed in the Ohio Valley. To the south of the front over the Ohio and Tennessee Valleys, surface dewpoints are in the mid 50s to the mid 60s F. The RAP has moderate instability in place from the Tennessee Valley eastward into the southern Appalachians and southward into the Gulf Coast states. Scattered thunderstorms are ongoing, concentrated along the northern edge of moderate instability from Kentucky and Tennessee eastward into western North Carolina. RAP forecast soundings in this vicinity early this evening have 0-6 km shear ranging from 35 to 45 knots, mostly due to speed shear in the mid-levels. This, combined with 0-3 km lapse rates in the 7.5 to 8 C/km range, should be favorable for severe gusts with the stronger cells. The shear will also support supercell development with large hail possible. The severe threat should become more isolated later this evening as instability decreases across the region. ...South Texas... A shortwave trough, with multiple vorticity maximums, appears to be located in the lower Rio Grande Valley, according to water vapor imagery. Scattered strong to severe thunderstorms are ongoing ahead of the trough from near Laredo extending eastward onto the Texas Coastal Plain. From the storms southward, moderate instability is analyzed by the RAP, with MLCAPE estimated to be in the 1000 to 2000 J/kg range. The airmass is very moist with surface dewpoints in the lower to mid 70s F. Within this moist airmass, RAP forecast soundings early this evening have 0-6 km shear near 50 knots, with 700-500 mb lapse rates near 7.5 C/km. This environment will support supercells with large hail, and hailstones greater than 2 inches in diameter will be possible within the more intense cores. Isolated severe gusts may also occur within the stronger downdrafts. The ongoing severe storms will track southeastward across the remainder of south Texas this evening...see MCD 749. ..Broyles.. 05/09/2025 Read more

WW 0242 Status Updates
STATUS REPORT ON WW 242 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 SSE TRI TO 20 SSE HKY TO 35 NE CLT TO 15 ENE GSO TO 20 NNW DAN TO 10 SSW ROA. ..HART..05/09/25 ATTN...WFO...FFC...GSP...RAH...RNK...CAE... STATUS REPORT FOR WS 242 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS GAC011-015-047-055-057-083-085-105-111-115-117-119-123-129-137- 139-147-187-213-227-241-257-281-291-295-311-313-090140- GA . GEORGIA COUNTIES INCLUDED ARE BANKS BARTOW CATOOSA CHATTOOGA CHEROKEE DADE DAWSON ELBERT FANNIN FLOYD FORSYTH FRANKLIN GILMER GORDON HABERSHAM HALL HART LUMPKIN MURRAY PICKENS RABUN STEPHENS TOWNS UNION WALKER WHITE WHITFIELD NCC001-007-021-025-033-037-045-051-071-075-085-087-089-093-099- 105-111-113-115-119-121-123-125-135-145-149-151-153-161-165-167- 173-175-179-199-090140- NC . NORTH CAROLINA COUNTIES INCLUDED ARE Read more

MD 0749 CONCERNING SEVERE POTENTIAL...WATCH LIKELY FOR PORTIONS OF SOUTH TEXAS
Mesoscale Discussion 0749 NWS Storm Prediction Center Norman OK 0655 PM CDT Thu May 08 2025 Areas affected...portions of south Texas Concerning...Severe potential...Watch likely Valid 082355Z - 090100Z Probability of Watch Issuance...95 percent SUMMARY...A new small WW will be issued shortly. A cluster of storms is expected to continue eastward toward the Texas coast with a risk for hail and damaging winds this evening. DISCUSSION...As of 2355 UTC, regional radar analysis showed a cluster of severe storms ongoing near a diffuse front/modified outflow boundary across portions of the Rio Grande Valley and South TX. Recent radar trends and CAM guidance continue to suggest upscale growth is likely with this cluster, and additional storms moving over the River in the next few hours. The environment downstream remains favorable for organized severe storms with moderate instability and deep-layer shear. While some prior convection and the coastal front have reduced temperatures near the immediate coast somewhat, robust moisture (surface dewpoints in the 70s F) and steep mid-level lapse rates will likely offset nocturnal stabilization this evening. This suggest the threat for damaging winds and hail may continue into the immediate coastal counties and offshore tonight. Given the increasing severe threat, a small WW will be issued shortly east of WW241. ..Lyons/Smith.. 05/08/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...CRP...EWX...BRO... LAT...LON 27409873 28389885 28729866 28549758 28199693 27149724 27039761 26819823 26919833 27409873 MOST PROBABLE PEAK WIND GUST...65-80 MPH MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN Read more

WW 0240 Status Updates
STATUS REPORT ON WW 240 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 NW CHA TO 40 NNE TYS TO 40 NW TRI TO 45 E JKL. ..HART..05/09/25 ATTN...WFO...JKL...MRX...RLX... STATUS REPORT FOR WS 240 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS KYC195-090140- KY . KENTUCKY COUNTIES INCLUDED ARE PIKE NCC039-043-090140- NC . NORTH CAROLINA COUNTIES INCLUDED ARE CHEROKEE CLAY TNC001-007-009-011-019-029-057-059-063-065-067-073-089-091-093- 105-107-115-121-123-139-143-145-153-155-163-171-173-179- 090140- TN . TENNESSEE COUNTIES INCLUDED ARE ANDERSON BLEDSOE BLOUNT BRADLEY CARTER COCKE Read more

WW 0239 Status Updates
STATUS REPORT ON WW 239 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 WSW MSL TO 45 NW CHA. ..HART..05/09/25 ATTN...WFO...BMX...HUN... STATUS REPORT FOR WS 239 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ALC009-019-043-049-055-057-059-071-073-075-079-083-089-093-095- 103-107-115-125-127-133-090140- AL . ALABAMA COUNTIES INCLUDED ARE BLOUNT CHEROKEE CULLMAN DEKALB ETOWAH FAYETTE FRANKLIN JACKSON JEFFERSON LAMAR LAWRENCE LIMESTONE MADISON MARION MARSHALL MORGAN PICKENS ST. CLAIR TUSCALOOSA WALKER WINSTON TNC051-103-127-090140- TN . TENNESSEE COUNTIES INCLUDED ARE FRANKLIN LINCOLN MOORE THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL Read more