Severe Storms

WW 0530 Status Updates
STATUS REPORT ON WW 530 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NE POU TO 15 SE ORH TO 25 SW PSM TO 20 SSE PWM. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1741 ..DEAN..07/20/25 ATTN...WFO...OKX...BOX...ALY...GYX... STATUS REPORT FOR WS 530 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS CTC001-003-005-007-009-011-013-015-210040- CT . CONNECTICUT COUNTIES INCLUDED ARE FAIRFIELD HARTFORD LITCHFIELD MIDDLESEX NEW HAVEN NEW LONDON TOLLAND WINDHAM MAC005-009-017-021-023-025-210040- MA . MASSACHUSETTS COUNTIES INCLUDED ARE BRISTOL ESSEX MIDDLESEX NORFOLK PLYMOUTH SUFFOLK RIC001-003-005-007-009-210040- RI . RHODE ISLAND COUNTIES INCLUDED ARE Read more

WW 0530 Status Updates
STATUS REPORT ON WW 530 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NE POU TO 15 SE ORH TO 25 SW PSM TO 20 SSE PWM. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1741 ..DEAN..07/20/25 ATTN...WFO...OKX...BOX...ALY...GYX... STATUS REPORT FOR WS 530 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS CTC001-003-005-007-009-011-013-015-210040- CT . CONNECTICUT COUNTIES INCLUDED ARE FAIRFIELD HARTFORD LITCHFIELD MIDDLESEX NEW HAVEN NEW LONDON TOLLAND WINDHAM MAC005-009-017-021-023-025-210040- MA . MASSACHUSETTS COUNTIES INCLUDED ARE BRISTOL ESSEX MIDDLESEX NORFOLK PLYMOUTH SUFFOLK RIC001-003-005-007-009-210040- RI . RHODE ISLAND COUNTIES INCLUDED ARE Read more

WW 0530 Status Updates
STATUS REPORT ON WW 530 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NE POU TO 15 SE ORH TO 25 SW PSM TO 20 SSE PWM. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1741 ..DEAN..07/20/25 ATTN...WFO...OKX...BOX...ALY...GYX... STATUS REPORT FOR WS 530 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS CTC001-003-005-007-009-011-013-015-210040- CT . CONNECTICUT COUNTIES INCLUDED ARE FAIRFIELD HARTFORD LITCHFIELD MIDDLESEX NEW HAVEN NEW LONDON TOLLAND WINDHAM MAC005-009-017-021-023-025-210040- MA . MASSACHUSETTS COUNTIES INCLUDED ARE BRISTOL ESSEX MIDDLESEX NORFOLK PLYMOUTH SUFFOLK RIC001-003-005-007-009-210040- RI . RHODE ISLAND COUNTIES INCLUDED ARE Read more

WW 0530 Status Updates
STATUS REPORT ON WW 530 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NE POU TO 15 SE ORH TO 25 SW PSM TO 20 SSE PWM. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1741 ..DEAN..07/20/25 ATTN...WFO...OKX...BOX...ALY...GYX... STATUS REPORT FOR WS 530 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS CTC001-003-005-007-009-011-013-015-210040- CT . CONNECTICUT COUNTIES INCLUDED ARE FAIRFIELD HARTFORD LITCHFIELD MIDDLESEX NEW HAVEN NEW LONDON TOLLAND WINDHAM MAC005-009-017-021-023-025-210040- MA . MASSACHUSETTS COUNTIES INCLUDED ARE BRISTOL ESSEX MIDDLESEX NORFOLK PLYMOUTH SUFFOLK RIC001-003-005-007-009-210040- RI . RHODE ISLAND COUNTIES INCLUDED ARE Read more

WW 0530 Status Updates
STATUS REPORT ON WW 530 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NE POU TO 15 SE ORH TO 25 SW PSM TO 20 SSE PWM. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1741 ..DEAN..07/20/25 ATTN...WFO...OKX...BOX...ALY...GYX... STATUS REPORT FOR WS 530 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS CTC001-003-005-007-009-011-013-015-210040- CT . CONNECTICUT COUNTIES INCLUDED ARE FAIRFIELD HARTFORD LITCHFIELD MIDDLESEX NEW HAVEN NEW LONDON TOLLAND WINDHAM MAC005-009-017-021-023-025-210040- MA . MASSACHUSETTS COUNTIES INCLUDED ARE BRISTOL ESSEX MIDDLESEX NORFOLK PLYMOUTH SUFFOLK RIC001-003-005-007-009-210040- RI . RHODE ISLAND COUNTIES INCLUDED ARE Read more

WW 530 SEVERE TSTM CT MA ME NH RI VT CW 202010Z - 210100Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 530 NWS Storm Prediction Center Norman OK 410 PM EDT Sun Jul 20 2025 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Connecticut Massachusetts Far Southern Maine Southern New Hampshire Rhode Island Southern Vermont Coastal Waters * Effective this Sunday afternoon and evening from 410 PM until 900 PM EDT. * Primary threats include... Scattered damaging wind gusts to 65 mph possible Isolated large hail events to 1 inch in diameter possible SUMMARY...Scattered thunderstorms are forecast to continue to develop and intensify and pose primarily a threat for strong to severe gusts (55-65 mph). Isolated large hail may accompany the stronger cells. This activity will likely reach the coast by the mid evening. The severe thunderstorm watch area is approximately along and 80 statute miles north and south of a line from 30 miles east northeast of Boston MA to 25 miles south southwest of Pittsfield MA. 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. && AVIATION...A few severe thunderstorms with hail surface and aloft to 1 inch. Extreme turbulence and surface wind gusts to 55 knots. A few cumulonimbi with maximum tops to 400. Mean storm motion vector 28025. ...Smith Read more

MD 1741 CONCERNING SEVERE THUNDERSTORM WATCH 530... FOR PARTS OF SOUTHEAST NEW ENGLAND
Mesoscale Discussion 1741 NWS Storm Prediction Center Norman OK 0607 PM CDT Sun Jul 20 2025 Areas affected...Parts of southeast New England Concerning...Severe Thunderstorm Watch 530... Valid 202307Z - 210030Z The severe weather threat for Severe Thunderstorm Watch 530 continues. SUMMARY...Damaging wind remains possible this evening before storms move offshore. DISCUSSION...A small cluster of storms has recently intensified and produced some reports of wind damage, and will likely continue to pose some severe threat to the coast, within a modestly unstable and favorably sheared environment. An embedded supercell within this cluster could also pose a short-term threat for a brief tornado. Storms farther north into eastern MA have been somewhat less organized, but the KBOX VWP currently shows moderate (25-35 kt) westerly flow in the 1-3 km AGL layer, and there is some potential for these storms to locally intensify and pose at least a localized wind-damage threat before moving offshore later this evening. ..Dean.. 07/20/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...GYX...BOX...OKX...ALY... LAT...LON 40837250 40847307 41257316 41577314 41697284 41977175 42477147 43307097 43237063 42447034 41617052 41197116 40907236 40837250 MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 95 MPH MOST PROBABLE PEAK WIND GUST...55-70 MPH Read more

MD 1741 CONCERNING SEVERE THUNDERSTORM WATCH 530... FOR PARTS OF SOUTHEAST NEW ENGLAND
Mesoscale Discussion 1741 NWS Storm Prediction Center Norman OK 0607 PM CDT Sun Jul 20 2025 Areas affected...Parts of southeast New England Concerning...Severe Thunderstorm Watch 530... Valid 202307Z - 210030Z The severe weather threat for Severe Thunderstorm Watch 530 continues. SUMMARY...Damaging wind remains possible this evening before storms move offshore. DISCUSSION...A small cluster of storms has recently intensified and produced some reports of wind damage, and will likely continue to pose some severe threat to the coast, within a modestly unstable and favorably sheared environment. An embedded supercell within this cluster could also pose a short-term threat for a brief tornado. Storms farther north into eastern MA have been somewhat less organized, but the KBOX VWP currently shows moderate (25-35 kt) westerly flow in the 1-3 km AGL layer, and there is some potential for these storms to locally intensify and pose at least a localized wind-damage threat before moving offshore later this evening. ..Dean.. 07/20/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...GYX...BOX...OKX...ALY... LAT...LON 40837250 40847307 41257316 41577314 41697284 41977175 42477147 43307097 43237063 42447034 41617052 41197116 40907236 40837250 MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 95 MPH MOST PROBABLE PEAK WIND GUST...55-70 MPH Read more

MD 1740 CONCERNING SEVERE POTENTIAL...WATCH POSSIBLE FOR CENTRAL ILLINOIS INTO SOUTHERN INDIANA
Mesoscale Discussion 1740 NWS Storm Prediction Center Norman OK 0452 PM CDT Sun Jul 20 2025 Areas affected...Central Illinois into southern Indiana Concerning...Severe potential...Watch possible Valid 202152Z - 202345Z Probability of Watch Issuance...40 percent SUMMARY...A cluster of storms that has recently developed and intensified in central Illinois may pose some risk for damaging winds. It is not clear how far this cluster will move southeast or how intense it will be. A watch is possible, but it will depend on convective trends in the next couple of hours. DISCUSSION...Despite lingering cloud cover strong heating south of a stationary font along with perhaps subtle aid from a passing MCV has promote storm development in central Illinois. The stronger effective shear is north of the boundary, but 25-30 kts south of the boundary may be sufficient for modest storm organization. The question remains how far southeast this storm cluster can persist. Temperatures in the upper 80s to low 90s F along with mid/upper 70s F dewpoints will provide buoyant inflow and the boundary will provide some focus for propagation. Even with these positive factors, large scale ascent is weak as are mid-level lapse rates. The need for a watch is not immediately clear, but convective trends will be monitored over the next couple of hours. ..Wendt/Hart.. 07/20/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...LMK...IND...PAH...ILX...LSX... LAT...LON 39248935 39558929 39738915 39808844 39648755 39228558 38628571 38328643 38408756 38948900 39248935 MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 95 MPH MOST PROBABLE PEAK WIND GUST...55-70 MPH Read more

WW 0530 Status Updates
STATUS REPORT ON WW 530 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 NE POU TO 15 SE ORH TO 25 SW PSM TO 20 SSE PWM. FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1741 ..DEAN..07/20/25 ATTN...WFO...OKX...BOX...ALY...GYX... STATUS REPORT FOR WS 530 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS CTC001-003-005-007-009-011-013-015-210040- CT . CONNECTICUT COUNTIES INCLUDED ARE FAIRFIELD HARTFORD LITCHFIELD MIDDLESEX NEW HAVEN NEW LONDON TOLLAND WINDHAM MAC005-009-017-021-023-025-210040- MA . MASSACHUSETTS COUNTIES INCLUDED ARE BRISTOL ESSEX MIDDLESEX NORFOLK PLYMOUTH SUFFOLK RIC001-003-005-007-009-210040- RI . RHODE ISLAND COUNTIES INCLUDED ARE Read more

WW 530 SEVERE TSTM CT MA ME NH RI VT CW 202010Z - 210100Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 530 NWS Storm Prediction Center Norman OK 410 PM EDT Sun Jul 20 2025 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Connecticut Massachusetts Far Southern Maine Southern New Hampshire Rhode Island Southern Vermont Coastal Waters * Effective this Sunday afternoon and evening from 410 PM until 900 PM EDT. * Primary threats include... Scattered damaging wind gusts to 65 mph possible Isolated large hail events to 1 inch in diameter possible SUMMARY...Scattered thunderstorms are forecast to continue to develop and intensify and pose primarily a threat for strong to severe gusts (55-65 mph). Isolated large hail may accompany the stronger cells. This activity will likely reach the coast by the mid evening. The severe thunderstorm watch area is approximately along and 80 statute miles north and south of a line from 30 miles east northeast of Boston MA to 25 miles south southwest of Pittsfield MA. 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. && AVIATION...A few severe thunderstorms with hail surface and aloft to 1 inch. Extreme turbulence and surface wind gusts to 55 knots. A few cumulonimbi with maximum tops to 400. Mean storm motion vector 28025. ...Smith Read more

WW 0532 Status Updates
STATUS REPORT ON WW 532 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..GUYER..07/20/25 ATTN...WFO...LBF...UNR...ABR... STATUS REPORT FOR WT 532 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NEC017-031-103-149-210040- NE . NEBRASKA COUNTIES INCLUDED ARE BROWN CHERRY KEYA PAHA ROCK SDC007-071-075-085-095-121-123-210040- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE BENNETT JACKSON JONES LYMAN MELLETTE TODD TRIPP 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 532 TORNADO NE SD 202220Z - 210400Z
URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 532 NWS Storm Prediction Center Norman OK 420 PM MDT Sun Jul 20 2025 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of North Central Nebraska South Central South Dakota * Effective this Sunday afternoon and evening from 420 PM until 1000 PM MDT. * Primary threats include... A couple tornadoes possible Scattered large hail and isolated very large hail events to 2.5 inches in diameter likely Scattered damaging wind gusts to 70 mph possible SUMMARY...Isolated supercell thunderstorms are forming in a very unstable airmass. Very large hail, damaging winds, and a few tornadoes are possible with these storms through the evening. The tornado watch area is approximately along and 50 statute miles east and west of a line from 85 miles north of Valentine NE to 55 miles south southwest of Valentine NE. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU2). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Watch means conditions are favorable for tornadoes and 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. && OTHER WATCH INFORMATION...CONTINUE...WW 530...WW 531... AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 27025. ...Hart Read more

WW 0531 Status Updates
STATUS REPORT ON WW 531 THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA. ..GUYER..07/20/25 ATTN...WFO...BYZ...GGW...BIS... STATUS REPORT FOR WS 531 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS MTC011-017-021-025-033-055-075-079-083-087-103-109-210040- MT . MONTANA COUNTIES INCLUDED ARE CARTER CUSTER DAWSON FALLON GARFIELD MCCONE POWDER RIVER PRAIRIE RICHLAND ROSEBUD TREASURE WIBAUX NDC001-007-011-025-033-041-053-087-089-210040- ND . NORTH DAKOTA COUNTIES INCLUDED ARE ADAMS BILLINGS BOWMAN DUNN GOLDEN VALLEY HETTINGER MCKENZIE SLOPE STARK 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 531 SEVERE TSTM MT ND 202210Z - 210600Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 531 NWS Storm Prediction Center Norman OK 410 PM MDT Sun Jul 20 2025 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Southeast Montana Southwest North Dakota * Effective this Sunday afternoon from 410 PM until Midnight MDT. * Primary threats include... Scattered large hail and isolated very large hail events to 2 inches in diameter possible Scattered damaging wind gusts to 70 mph possible SUMMARY...Multiple clusters of thunderstorms will affect the watch area through the evening, including a few supercells. Damaging winds and large hail are the main concerns. The severe thunderstorm watch area is approximately along and 75 statute miles north and south of a line from 65 miles west of Miles City MT to 20 miles east of Dickinson ND. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU1). 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 530... 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. ...Hart Read more

MD 1739 CONCERNING SEVERE POTENTIAL...WATCH POSSIBLE FOR EASTERN MT/FAR NORTHEAST WY/WESTERN ND/WESTERN SD
Mesoscale Discussion 1739 NWS Storm Prediction Center Norman OK 0445 PM CDT Sun Jul 20 2025 Areas affected...Eastern MT/far northeast WY/western ND/western SD Concerning...Severe potential...Watch possible Valid 202145Z - 202315Z Probability of Watch Issuance...60 percent SUMMARY...Severe thunderstorm potential will increase initially across east/southeast Montana and possibly far northeast Wyoming into the far western Dakotas through early evening. DISCUSSION...Storms have shown recent signs of intensification within a semi-moist/moderately unstable corridor from east-central Montana into southwest North Dakota, with additional towering cu noted in visible satellite imagery across southeast Montana. The region is being influenced by a shortwave trough over Alberta/Saskatchewan and a related belt of low-amplitude westerlies, contributing to 40+ kt effective shear. Scenario will support at least isolated severe storm development including some initial supercells with the potential for large hail and severe-caliber wind gusts. Convective trends are being monitored for a possible Watch. ..Guyer/Hart.. 07/20/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...ABR...BIS...UNR...BYZ...GGW... LAT...LON 47570601 47840329 47310175 45600136 44770222 44560357 44620665 46370753 47570601 MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 95 MPH MOST PROBABLE PEAK WIND GUST...65-80 MPH MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN Read more

WW 0533 Status Updates
STATUS FOR WATCH 0533 HAS NOT BEEN ISSUED YET Read more

WW 533 SEVERE TSTM IL IN 202310Z - 210500Z
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 533 NWS Storm Prediction Center Norman OK 610 PM CDT Sun Jul 20 2025 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Southeast Illinois Southern Indiana * Effective this Sunday night from 610 PM until Midnight CDT. * Primary threats include... Scattered damaging winds and isolated significant gusts to 75 mph possible Isolated large hail events to 1.5 inches in diameter possible SUMMARY...A cluster of intense thunderstorms has formed in southeast Illinois. These storms are expected to track southeastward this evening across the watch area. Damaging winds are the main concern. The severe thunderstorm watch area is approximately along and 40 statute miles north and south of a line from 30 miles south southwest of Mattoon IL to 30 miles north northeast of Louisville KY. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU3). 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 530...WW 531...WW 532... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 29030. ...Hart Read more

WW 0532 Status Updates
STATUS FOR WATCH 0532 HAS NOT BEEN ISSUED YET Read more

WW 0531 Status Updates
STATUS FOR WATCH 0531 HAS NOT BEEN ISSUED YET Read more