270
ACUS11 KWNS 040019
SWOMCD
SPC MCD 040019
MDZ000-PAZ000-WVZ000-040115-
MESOSCALE DISCUSSION 2224
NWS STORM PREDICTION CENTER NORMAN OK
0719 PM CDT THU SEP 03 2026
AREAS AFFECTED...PORTIONS OF SOUTHERN PENNSYLVANIA INTO WESTERN
MARYLAND AND THE FAR EASTERN WEST VIRGINIA PANHANDLE
CONCERNING...SEVERE THUNDERSTORM WATCH 650...
VALID 040019Z - 040115Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 650
CONTINUES.
SUMMARY...A SMALL BOWING CLUSTER CONTINUES TO BRING A RISK FOR
PRIMARILY DAMAGING/SEVERE WIND GUSTS.
DISCUSSION...A PERSISTENT BOWING CLUSTER REMAINS ONGOING ACROSS
SOUTH-CENTRAL PENNSYLVANIA HAVING PRODUCED A SWATH OF WIND DAMAGE
REPORTS ACROSS PORTIONS OF WESTERN/SOUTHWESTERN PA OVER THE PAST
SEVERAL HOURS. WHILE LATEST OBJECTIVE ANALYSIS SUGGESTS THAT THE
LOW-LEVELS ARE BEGINNING TO STABILIZE OWING TO THE ONSET OF
NOCTURNAL COOLING, MODERATE TO STRONG INSTABILITY (2500-3000+ J/KG
MLCAPE) AND EFFECTIVE SHEAR UPWARDS OF 30-35 KTS SAMPLED BY THE
DOWNSTREAM 00Z IAD OBSERVED SOUNDING SHOULD CONTINUE TO PROMOTE
ORGANIZED, ROBUST UPDRAFTS AND THE POTENTIAL FOR DAMAGING/SEVERE
WIND GUSTS FOR AT LEAST ANOTHER 1-2 HOURS (AS SUPPORTED BY A RECENT
59 MPH MEASURED WIND GUST AT THE KJST ASOS SITE IN SOUTHERN PA).
..CHALMERS.. 09/04/2026
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT
ATTN...WFO...CTP...LWX...
LAT...LON 39627861 39787882 39887884 40017878 40247859 40307844
40297828 40177795 39927739 39767720 39537717 39337744
39387790 39627861
MOST PROBABLE PEAK WIND GUST...55-70 MPH
MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN
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