WW 652 SEVERE TSTM DC DE MD NJ PA VA WV CW 040040Z - 040600Z
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 652
NWS Storm Prediction Center Norman OK
840 PM EDT Thu Sep 3 2026
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
District Of Columbia
Delaware
Maryland
Southern New Jersey
Far Southeast Pennsylvania
Northern Virginia
Far Eastern West Virginia
Coastal Waters
* Effective this Thursday night and Friday morning from 840 PM
until 200 AM EDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
SUMMARY...Several clusters of strong to severe thunderstorms capable
of scattered damaging wind gusts will be possible this evening and
overnight.
The severe thunderstorm watch area is approximately along and 60
statute miles either side of a line from 30 miles west of
Martinsburg WV to 40 miles east of Salisbury MD. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU2).
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 647...WW 649...WW
650...WW 651...
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 450. Mean storm motion vector
29030.
...Smith
WW 651 SEVERE TSTM MN 032045Z - 040300Z
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 651
NWS Storm Prediction Center Norman OK
345 PM CDT Thu Sep 3 2026
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Northern Minnesota
* Effective this Thursday afternoon and evening from 345 PM until
1000 PM CDT.
* Primary threats include...
Scattered damaging wind gusts to 65 mph possible
Scattered large hail events to 1.5 inches in diameter possible
SUMMARY...A cluster of potentially severe storms will continue to
move eastward and pose risks for damaging winds and isolated large
hail through early evening.
The severe thunderstorm watch area is approximately along and 60
statute miles east and west of a line from 75 miles north of Hibbing
MN to 30 miles east southeast of Brainerd MN. 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 647...WW 648...WW
649...WW 650...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 55 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
28025.
...Guyer
WW 0652 Status Updates
STATUS REPORT ON WW 652
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 W MRB TO
15 ESE HGR TO 40 WNW ILG.
..CHALMERS..09/04/26
ATTN...WFO...LWX...PHI...AKQ...
STATUS REPORT FOR WS 652
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
DEC001-003-005-040340-
DE
. DELAWARE COUNTIES INCLUDED ARE
KENT NEW CASTLE SUSSEX
DCC001-040340-
DC
. DISTRICT OF COLUMBIA COUNTIES INCLUDED ARE
DISTRICT OF COLUMBIA
MDC003-005-009-011-013-015-017-019-021-025-027-029-031-033-035-
037-039-041-043-045-047-510-040340-
MD
. MARYLAND COUNTIES INCLUDED ARE
ANNE ARUNDEL BALTIMORE CALVERT
CAROLINE CARROLL CECIL
CHARLES DORCHESTER FREDERICK
WW 0651 Status Updates
STATUS REPORT ON WW 651
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..CHALMERS..09/04/26
ATTN...WFO...DLH...
STATUS REPORT FOR WS 651
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MNC001-017-021-035-061-071-137-040240-
MN
. MINNESOTA COUNTIES INCLUDED ARE
AITKIN CARLTON CASS
CROW WING ITASCA KOOCHICHING
ST. LOUIS
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.
WW 0650 Status Updates
STATUS REPORT ON WW 650
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 NE LBE TO
20 NE AOO TO 40 E AOO TO 15 NE CXY.
..CHALMERS..09/04/26
ATTN...WFO...LWX...CTP...
STATUS REPORT FOR WS 650
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MDC001-023-040240-
MD
. MARYLAND COUNTIES INCLUDED ARE
ALLEGANY GARRETT
PAC001-009-013-041-055-057-061-071-111-133-040240-
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
ADAMS BEDFORD BLAIR
CUMBERLAND FRANKLIN FULTON
HUNTINGDON LANCASTER SOMERSET
YORK
WVC023-027-031-057-040240-
WV
. WEST VIRGINIA COUNTIES INCLUDED ARE
GRANT HAMPSHIRE HARDY
WW 0649 Status Updates
STATUS REPORT ON WW 649
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 NW CMH TO
20 SE CAK TO 20 E FKL TO 20 N DUJ.
..CHALMERS..09/03/26
ATTN...WFO...CLE...PBZ...ILN...RLX...
STATUS REPORT FOR WS 649
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
OHC013-019-029-031-041-059-067-075-081-083-089-111-115-119-121-
127-157-167-040040-
OH
. OHIO COUNTIES INCLUDED ARE
BELMONT CARROLL COLUMBIANA
COSHOCTON DELAWARE GUERNSEY
HARRISON HOLMES JEFFERSON
KNOX LICKING MONROE
MORGAN MUSKINGUM NOBLE
PERRY TUSCARAWAS WASHINGTON
PAC003-005-007-019-031-051-059-063-065-073-125-129-040040-
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
ALLEGHENY ARMSTRONG BEAVER
BUTLER CLARION FAYETTE
GREENE INDIANA JEFFERSON
LAWRENCE WASHINGTON WESTMORELAND
WW 0647 Status Updates
STATUS REPORT ON WW 647
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 E JMS TO
20 WNW FAR TO 15 SW TVF TO 25 ESE HCO.
..MARSH..09/03/26
ATTN...WFO...FGF...
STATUS REPORT FOR WS 647
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MNC005-007-027-029-057-087-089-107-113-119-125-032240-
MN
. MINNESOTA COUNTIES INCLUDED ARE
BECKER BELTRAMI CLAY
CLEARWATER HUBBARD MAHNOMEN
MARSHALL NORMAN PENNINGTON
POLK RED LAKE
NDC003-017-032240-
ND
. NORTH DAKOTA COUNTIES INCLUDED ARE
BARNES CASS
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.
MD 2227 CONCERNING SEVERE THUNDERSTORM WATCH 652... FOR NORTHERN VIRGINIA AND CENTRAL MARYLAND
Mesoscale Discussion 2227
NWS Storm Prediction Center Norman OK
1056 PM CDT Thu Sep 03 2026
Areas affected...northern Virginia and central Maryland
Concerning...Severe Thunderstorm Watch 652...
Valid 040356Z - 040500Z
The severe weather threat for Severe Thunderstorm Watch 652
continues.
SUMMARY...Damaging wind threat is increasing for the greater
Washington D.C. area.
DISCUSSION...Rapid thunderstorm development occurred late this
evening in the vicinity of Washington D.C. Here, warm-air advection
thunderstorms combined with increasing convergence from an outflow
boundary from an earlier storm. The result has been a rapid increase
in hydrometeors aloft, which will support heavy water loaded
downdrafts/downbursts capable of wind damage across the greater
Washington D.C. area. At 0348Z Washington National airport measured
a 64 mph wind gust. This threat will continue to move east over the
next hour.
..Marsh.. 09/04/2026
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...PHI...LWX...
LAT...LON 39067724 39157691 39117648 38947629 38777634 38617657
38647704 38767728 39067724
MOST PROBABLE PEAK WIND GUST...55-70 MPH
MD 2226 CONCERNING SEVERE THUNDERSTORM WATCH 649...652... FOR PORTIONS OF THE MID-ATLANTIC
Mesoscale Discussion 2226
NWS Storm Prediction Center Norman OK
1013 PM CDT Thu Sep 03 2026
Areas affected...Portions of the Mid-Atlantic
Concerning...Severe Thunderstorm Watch 649...652...
Valid 040313Z - 040445Z
The severe weather threat for Severe Thunderstorm Watch 649, 652
continues.
SUMMARY...Multiple areas of strong-to-severe thunderstorms capable
of damaging winds will continue this evening and into the overnight
hours.
DISCUSSION...Multiple clusters of strong-to-severe thunderstorms are
ongoing across portions of the Mid-Atlantic this evening and should
continue into the overnight.
One such cluster is the remnants of a small bowing segment that
moved southeast out of Pennsylvania and is currently approaching
Baltimore, MD. Another, larger cluster, is stretched along a line
from easter West Virginia, northern Virginia, and parts of Maryland
and moving south-southeast. A third area extends northwest to
southeast from northern Virginia toward southern Chesapeake Bay
area.
The environment across the region remains unstable with MUCAPE
ranging from 2000-3000 J/kg with deep-layer shear around 35 knots,
which will be more than sufficient to sustain thunderstorms into the
overnight hours. Additionally, despite low-level lapse rates being
weaker than during the afternoon/evening, DCAPE values around
1000-1200 J/kg will be more than sufficient for damaging outflow
winds and perhaps a couple damaging downbursts.
At present the most likely corridor of damaging wind potential looks
to be along and ahead of the linear MCS moving south-southeast
across northern Virginia. This region looks to remain west of the
developing warm-air advection showers, is largely undisturbed by
previous convection, and lies ahead of a sufficiently organized MCS
that has a history of producing wind damage. A southwestward
extension of Severe Thunderstorm Watch #652 may be necessary.
..Marsh.. 09/04/2026
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...PHI...AKQ...LWX...PBZ...RLX...
LAT...LON 39038024 39357981 39477860 39537696 39547622 39437532
39207461 39027436 38607438 38177464 37887538 37837660
38267846 38828000 39038024
MOST PROBABLE PEAK WIND GUST...55-70 MPH
SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0800 PM CDT Thu Sep 03 2026
Valid 040100Z - 041200Z
...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS EVENING
ACROSS PART OF THE MID ATLANTIC INTO MIDDLE OHIO VALLEY...AND ACROSS
PARTS OF THE UPPER MIDWEST...
...SUMMARY...
Scattered strong thunderstorm development, posing mainly a risk for
severe wind and hail, remains possible into the overnight hours
across parts of the Mid Atlantic and Upper Midwest into the Great
Lakes.
...01Z Update...
...Mid Atlantic...
A convectively generated or augmented mid-level perturbation
continues to migrate east-southeastward across the upper Ohio
Valley, toward the northern Mid Atlantic, along the southern fringe
of broadly cyclonic flow overspreading the Northeast. This
continues to provide support for a clustering of stronger convective
development currently in a corridor across east central Ohio into
south central Pennsylvania. Although this activity appears to have
waned some in intensity from earlier, updraft inflow emanating from
a more moist environment, along and south of a diffuse remnant
outflow boundary across the central Maryland through Delmarva
Peninsula vicinity, might reinvigorate activity later this evening
into the overnight hours.
...Upper Midwest into Great Lakes region...
Convective evolution into and through the overnight hours remains a
bit unclear. An initial cluster of convection, supported by a short
wave impulse now progressing toward the Minnesota/Ontario border
vicinity and Lake Superior, is undergoing substantial weakening as
inflow becomes more stable to the cool side of a quasi-stationary
frontal zone, which roughly extends from the Red River Valley
through southern Great Lakes region.
Upstream, near the crest of building mid/upper ridging,
lower/mid-tropospheric warm advection is supporting scattered
renewed thunderstorm development across northwestern and west
central Minnesota. Closer to the frontal zone, where the inflow
environment is characterized by moderate to strong instability,
there still appears potential for the evolution of a small
organizing cluster across the Brainerd MN vicinity through mid to
late evening. As this progresses eastward, it is not clear that
this will be maintained overnight. A strengthening southwesterly
low-level jet may focus additional upscale growing thunderstorm
development downstream, across parts of northeastern Wisconsin into
Lower Michigan, but, elevated to the cool side of the frontal zone,
it is not clear that the environment will support more than very
limited potential for severe hail and wind.
..Kerr.. 09/04/2026
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