Severe Storms

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1057 PM CDT Wed Jul 09 2025 Valid 101200Z - 111200Z ...Synopsis... A midlevel trough will advance eastward from the Great Basin into the central Rockies during the day. In the base of the trough, enhanced deep-layer westerly flow will overspread a diurnally deepening boundary layer across the Greater Four Corners region during the afternoon. As a result, an expansive overlap of 10-15 percent RH and 15-20 mph sustained westerly surface winds will yield elevated to locally critical fire-weather conditions across the region. ..Weinman.. 07/10/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1057 PM CDT Wed Jul 09 2025 Valid 101200Z - 111200Z ...Synopsis... A midlevel trough will advance eastward from the Great Basin into the central Rockies during the day. In the base of the trough, enhanced deep-layer westerly flow will overspread a diurnally deepening boundary layer across the Greater Four Corners region during the afternoon. As a result, an expansive overlap of 10-15 percent RH and 15-20 mph sustained westerly surface winds will yield elevated to locally critical fire-weather conditions across the region. ..Weinman.. 07/10/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1057 PM CDT Wed Jul 09 2025 Valid 101200Z - 111200Z ...Synopsis... A midlevel trough will advance eastward from the Great Basin into the central Rockies during the day. In the base of the trough, enhanced deep-layer westerly flow will overspread a diurnally deepening boundary layer across the Greater Four Corners region during the afternoon. As a result, an expansive overlap of 10-15 percent RH and 15-20 mph sustained westerly surface winds will yield elevated to locally critical fire-weather conditions across the region. ..Weinman.. 07/10/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1057 PM CDT Wed Jul 09 2025 Valid 101200Z - 111200Z ...Synopsis... A midlevel trough will advance eastward from the Great Basin into the central Rockies during the day. In the base of the trough, enhanced deep-layer westerly flow will overspread a diurnally deepening boundary layer across the Greater Four Corners region during the afternoon. As a result, an expansive overlap of 10-15 percent RH and 15-20 mph sustained westerly surface winds will yield elevated to locally critical fire-weather conditions across the region. ..Weinman.. 07/10/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

WW 0499 Status Updates
STATUS REPORT ON WW 499 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 W WAL TO 25 S DOV TO 10 SSE ILG TO 5 SSE EWR AND 30 E WAL TO 20 SW ACY TO 5 W JFK. ..SPC..07/10/25 ATTN...WFO...PHI...AKQ... STATUS REPORT FOR WS 499 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NJC001-005-009-025-029-100340- NJ . NEW JERSEY COUNTIES INCLUDED ARE ATLANTIC BURLINGTON CAPE MAY MONMOUTH OCEAN ANZ431-450-451-452-453-454-455-100340- CW . ADJACENT COASTAL WATERS INCLUDED ARE DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE COASTAL WATERS FROM SANDY HOOK TO MANASQUAN INLET NJ OUT 20 NM COASTAL WATERS FROM MANASQUAN INLET TO LITTLE EGG INLET NJ OUT 20 NM COASTAL WATERS FROM LITTLE EGG INLET TO GREAT EGG INLET NJ OUT 20 NM Read more

WW 0499 Status Updates
STATUS REPORT ON WW 499 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 W WAL TO 25 S DOV TO 10 SSE ILG TO 5 SSE EWR AND 30 E WAL TO 20 SW ACY TO 5 W JFK. ..SPC..07/10/25 ATTN...WFO...PHI...AKQ... STATUS REPORT FOR WS 499 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NJC001-005-009-025-029-100340- NJ . NEW JERSEY COUNTIES INCLUDED ARE ATLANTIC BURLINGTON CAPE MAY MONMOUTH OCEAN ANZ431-450-451-452-453-454-455-100340- CW . ADJACENT COASTAL WATERS INCLUDED ARE DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE COASTAL WATERS FROM SANDY HOOK TO MANASQUAN INLET NJ OUT 20 NM COASTAL WATERS FROM MANASQUAN INLET TO LITTLE EGG INLET NJ OUT 20 NM COASTAL WATERS FROM LITTLE EGG INLET TO GREAT EGG INLET NJ OUT 20 NM Read more

WW 0499 Status Updates
STATUS REPORT ON WW 499 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 W WAL TO 25 S DOV TO 10 SSE ILG TO 5 SSE EWR AND 30 E WAL TO 20 SW ACY TO 5 W JFK. ..SPC..07/10/25 ATTN...WFO...PHI...AKQ... STATUS REPORT FOR WS 499 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NJC001-005-009-025-029-100340- NJ . NEW JERSEY COUNTIES INCLUDED ARE ATLANTIC BURLINGTON CAPE MAY MONMOUTH OCEAN ANZ431-450-451-452-453-454-455-100340- CW . ADJACENT COASTAL WATERS INCLUDED ARE DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE COASTAL WATERS FROM SANDY HOOK TO MANASQUAN INLET NJ OUT 20 NM COASTAL WATERS FROM MANASQUAN INLET TO LITTLE EGG INLET NJ OUT 20 NM COASTAL WATERS FROM LITTLE EGG INLET TO GREAT EGG INLET NJ OUT 20 NM Read more

WW 0499 Status Updates
STATUS REPORT ON WW 499 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 W WAL TO 25 S DOV TO 10 SSE ILG TO 5 SSE EWR AND 30 E WAL TO 20 SW ACY TO 5 W JFK. ..SPC..07/10/25 ATTN...WFO...PHI...AKQ... STATUS REPORT FOR WS 499 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NJC001-005-009-025-029-100340- NJ . NEW JERSEY COUNTIES INCLUDED ARE ATLANTIC BURLINGTON CAPE MAY MONMOUTH OCEAN ANZ431-450-451-452-453-454-455-100340- CW . ADJACENT COASTAL WATERS INCLUDED ARE DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE COASTAL WATERS FROM SANDY HOOK TO MANASQUAN INLET NJ OUT 20 NM COASTAL WATERS FROM MANASQUAN INLET TO LITTLE EGG INLET NJ OUT 20 NM COASTAL WATERS FROM LITTLE EGG INLET TO GREAT EGG INLET NJ OUT 20 NM Read more

MD 1623 CONCERNING SEVERE THUNDERSTORM WATCH 498...500... FOR SOUTH-CENTRAL ND...CENTRAL SD...AND NORTH-CENTRAL NE
Mesoscale Discussion 1623 NWS Storm Prediction Center Norman OK 0826 PM CDT Wed Jul 09 2025 Areas affected...South-central ND...central SD...and north-central NE Concerning...Severe Thunderstorm Watch 498...500... Valid 100126Z - 100300Z The severe weather threat for Severe Thunderstorm Watch 498, 500 continues. SUMMARY...Swaths of severe wind remain possible with multiple MCSs traversing the region tonight. Isolated large hail is also possible with the more discrete storms. DISCUSSION...Regional radar data shows two primary MCSs tracking eastward/southeastward across central SD/south-central ND and north-central NE tonight. The northern MCS has already produced a swath of measured severe wind gusts, with more isolated wind reports with the southern MCS over NE. As these systems continue east-southeastward, extremely unstable inflow (sampled by the modified ABR 00Z sounding), 30-40 kt of line-orthogonal effective shear, and a 30-kt low-level jet (per VWP data) should support the maintenance of these systems for at least the next couple hours. It is possible that both MCSs will peak in intensity during this time frame, before the boundary layer nocturnally cools. The primary concern will be swaths of severe wind gusts (some 75+ mph possible), though isolated large hail also remains possible with the more discrete storms evolving along trailing outflow boundaries. ..Weinman.. 07/10/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...FGF...FSD...ABR...BIS...LBF...UNR... LAT...LON 45789993 46569991 46979960 46919872 46529809 45549789 43899803 42949831 42169876 41449955 41340017 41500089 41940110 42440074 43080005 44489998 45789993 MOST PROBABLE PEAK WIND GUST...65-80 MPH MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN Read more

WW 499 SEVERE TSTM DE MD NJ PA CW 092130Z - 100400Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 499 NWS Storm Prediction Center Norman OK 530 PM EDT Wed Jul 9 2025 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Delaware Eastern Maryland Central and Southern New Jersey Southeast Pennsylvania Coastal Waters * Effective this Wednesday afternoon from 530 PM until Midnight EDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Isolated large hail events to 1 inch in diameter possible SUMMARY...Thunderstorms will spread eastward across the watch area through the evening. A warm/humid and moderately unstable air mass will promote a risk of locally damaging wind gusts with the stronger cells. The severe thunderstorm watch area is approximately along and 60 statute miles east and west of a line from 35 miles northeast of Trenton NJ to 30 miles southeast of Patuxent River MD. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU9). 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 497...WW 498... AVIATION...A few severe thunderstorms with hail surface and aloft to 1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 26025. ...Hart Read more

WW 0500 Status Updates
STATUS REPORT ON WW 500 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1623 ..WEINMAN..07/10/25 ATTN...WFO...FGF...BIS...OAX...LBF...GID...FSD...ABR... STATUS REPORT FOR WS 500 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NEC003-009-011-015-017-019-027-041-047-063-071-073-077-079-081- 089-093-099-103-107-111-115-119-121-125-137-139-141-143-149-163- 167-175-179-183-100340- NE . NEBRASKA COUNTIES INCLUDED ARE ANTELOPE BLAINE BOONE BOYD BROWN BUFFALO CEDAR CUSTER DAWSON FRONTIER GARFIELD GOSPER GREELEY HALL HAMILTON HOLT HOWARD KEARNEY KEYA PAHA KNOX LINCOLN LOUP MADISON MERRICK NANCE PHELPS PIERCE PLATTE POLK ROCK SHERMAN STANTON VALLEY WAYNE WHEELER NDC003-005-021-027-031-039-043-045-047-051-063-069-071-073-081- 093-103-100340- Read more

WW 0500 Status Updates
STATUS REPORT ON WW 500 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1623 ..WEINMAN..07/10/25 ATTN...WFO...FGF...BIS...OAX...LBF...GID...FSD...ABR... STATUS REPORT FOR WS 500 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NEC003-009-011-015-017-019-027-041-047-063-071-073-077-079-081- 089-093-099-103-107-111-115-119-121-125-137-139-141-143-149-163- 167-175-179-183-100340- NE . NEBRASKA COUNTIES INCLUDED ARE ANTELOPE BLAINE BOONE BOYD BROWN BUFFALO CEDAR CUSTER DAWSON FRONTIER GARFIELD GOSPER GREELEY HALL HAMILTON HOLT HOWARD KEARNEY KEYA PAHA KNOX LINCOLN LOUP MADISON MERRICK NANCE PHELPS PIERCE PLATTE POLK ROCK SHERMAN STANTON VALLEY WAYNE WHEELER NDC003-005-021-027-031-039-043-045-047-051-063-069-071-073-081- 093-103-100340- Read more

MD 1622 CONCERNING SEVERE THUNDERSTORM WATCH 499... FOR MIDDLE ATLANTIC
Mesoscale Discussion 1622 NWS Storm Prediction Center Norman OK 0735 PM CDT Wed Jul 09 2025 Areas affected...Middle Atlantic Concerning...Severe Thunderstorm Watch 499... Valid 100035Z - 100230Z The severe weather threat for Severe Thunderstorm Watch 499 continues. SUMMARY...Strong-severe convection will spread across central and eastern portions of ww499 over the next several hours. Damaging winds remain possible. DISCUSSION...An elongated corridor of organized convection is progressing across the Middle Atlantic early this evening. This activity is shifting east at roughly 20kt, which would allow the leading edge of the squall line to move off the NJ Coast shortly after 02z. Strongest convection should remain focused across the southern half of the watch where considerably more instability persists. 00z sounding from WAL supports this with roughly 2400 J/kg MLCAPE, but lapse rates are quite weak due to very moist profiles. Even so, strong downdrafts, due to water loading, remain possible as PW values are on the order of 2.25 inches. ..Darrow.. 07/10/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...OKX...PHI...AKQ...LWX... LAT...LON 37977711 40627546 40637318 37977491 37977711 MOST PROBABLE PEAK WIND GUST...55-70 MPH Read more

WW 0499 Status Updates
STATUS REPORT ON WW 499 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 W WAL TO 25 S DOV TO 10 SSE ILG TO 5 SSE EWR. ..SPC..07/10/25 ATTN...WFO...PHI...AKQ... STATUS REPORT FOR WS 499 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS DEC001-005-100240- DE . DELAWARE COUNTIES INCLUDED ARE KENT SUSSEX MDC039-045-047-100240- MD . MARYLAND COUNTIES INCLUDED ARE SOMERSET WICOMICO WORCESTER NJC001-005-007-009-011-015-025-029-033-100240- NJ . NEW JERSEY COUNTIES INCLUDED ARE ATLANTIC BURLINGTON CAMDEN CAPE MAY CUMBERLAND GLOUCESTER MONMOUTH OCEAN SALEM Read more

WW 0500 Status Updates
STATUS REPORT ON WW 500 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1623 ..WEINMAN..07/10/25 ATTN...WFO...FGF...BIS...OAX...LBF...GID...FSD...ABR... STATUS REPORT FOR WS 500 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NEC003-009-011-015-017-019-027-041-047-063-071-073-077-079-081- 089-093-099-103-107-111-115-119-121-125-137-139-141-143-149-163- 167-175-179-183-100240- NE . NEBRASKA COUNTIES INCLUDED ARE ANTELOPE BLAINE BOONE BOYD BROWN BUFFALO CEDAR CUSTER DAWSON FRONTIER GARFIELD GOSPER GREELEY HALL HAMILTON HOLT HOWARD KEARNEY KEYA PAHA KNOX LINCOLN LOUP MADISON MERRICK NANCE PHELPS PIERCE PLATTE POLK ROCK SHERMAN STANTON VALLEY WAYNE WHEELER NDC003-005-021-027-031-039-043-045-047-051-063-069-071-073-081- 093-103-100240- Read more

WW 0498 Status Updates
STATUS REPORT ON WW 498 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 ENE SNY TO 30 W VTN TO 20 N PHP TO 35 NNE RAP TO 50 SE 2WX TO 25 WSW MBG TO 5 SE N60. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1623 ..WEINMAN..07/10/25 ATTN...WFO...BIS...LBF...CYS...UNR...ABR... STATUS REPORT FOR WS 498 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NEC005-031-075-091-113-117-171-100240- NE . NEBRASKA COUNTIES INCLUDED ARE ARTHUR CHERRY GRANT HOOKER LOGAN MCPHERSON THOMAS NDC015-029-085-100240- ND . NORTH DAKOTA COUNTIES INCLUDED ARE BURLEIGH EMMONS SIOUX SDC021-041-055-065-075-085-093-095-107-117-119-121-123-129-137- 100240- SD Read more

WW 0498 Status Updates
STATUS REPORT ON WW 498 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 ENE SNY TO 30 W VTN TO 20 N PHP TO 35 NNE RAP TO 50 SE 2WX TO 25 WSW MBG TO 5 SE N60. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1623 ..WEINMAN..07/10/25 ATTN...WFO...BIS...LBF...CYS...UNR...ABR... STATUS REPORT FOR WS 498 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NEC005-031-075-091-113-117-171-100240- NE . NEBRASKA COUNTIES INCLUDED ARE ARTHUR CHERRY GRANT HOOKER LOGAN MCPHERSON THOMAS NDC015-029-085-100240- ND . NORTH DAKOTA COUNTIES INCLUDED ARE BURLEIGH EMMONS SIOUX SDC021-041-055-065-075-085-093-095-107-117-119-121-123-129-137- 100240- SD Read more

WW 0498 Status Updates
STATUS REPORT ON WW 498 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 ENE SNY TO 30 W VTN TO 20 N PHP TO 35 NNE RAP TO 50 SE 2WX TO 25 WSW MBG TO 5 SE N60. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1623 ..WEINMAN..07/10/25 ATTN...WFO...BIS...LBF...CYS...UNR...ABR... STATUS REPORT FOR WS 498 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NEC005-031-075-091-113-117-171-100240- NE . NEBRASKA COUNTIES INCLUDED ARE ARTHUR CHERRY GRANT HOOKER LOGAN MCPHERSON THOMAS NDC015-029-085-100240- ND . NORTH DAKOTA COUNTIES INCLUDED ARE BURLEIGH EMMONS SIOUX SDC021-041-055-065-075-085-093-095-107-117-119-121-123-129-137- 100240- SD Read more

WW 0498 Status Updates
STATUS REPORT ON WW 498 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 ENE SNY TO 30 W VTN TO 20 N PHP TO 35 NNE RAP TO 50 SE 2WX TO 25 WSW MBG TO 5 SE N60. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1623 ..WEINMAN..07/10/25 ATTN...WFO...BIS...LBF...CYS...UNR...ABR... STATUS REPORT FOR WS 498 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NEC005-031-075-091-113-117-171-100240- NE . NEBRASKA COUNTIES INCLUDED ARE ARTHUR CHERRY GRANT HOOKER LOGAN MCPHERSON THOMAS NDC015-029-085-100240- ND . NORTH DAKOTA COUNTIES INCLUDED ARE BURLEIGH EMMONS SIOUX SDC021-041-055-065-075-085-093-095-107-117-119-121-123-129-137- 100240- SD Read more

WW 0498 Status Updates
STATUS REPORT ON WW 498 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 ENE SNY TO 30 W VTN TO 20 N PHP TO 35 NNE RAP TO 50 SE 2WX TO 25 WSW MBG TO 5 SE N60. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1623 ..WEINMAN..07/10/25 ATTN...WFO...BIS...LBF...CYS...UNR...ABR... STATUS REPORT FOR WS 498 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NEC005-031-075-091-113-117-171-100240- NE . NEBRASKA COUNTIES INCLUDED ARE ARTHUR CHERRY GRANT HOOKER LOGAN MCPHERSON THOMAS NDC015-029-085-100240- ND . NORTH DAKOTA COUNTIES INCLUDED ARE BURLEIGH EMMONS SIOUX SDC021-041-055-065-075-085-093-095-107-117-119-121-123-129-137- 100240- SD Read more