ZCZC SPCSWOMCD ALL
ACUS11 KWNS 282354 
SPC MCD 282354 
NJZ000-PAZ000-MDZ000-DEZ000-290130-

Mesoscale Discussion 1760
NWS Storm Prediction Center Norman OK
0654 PM CDT Fri Jul 28 2023

Areas affected...Portions of the Delmarva into southern New Jersey

Concerning...Severe Thunderstorm Watch 558...

Valid 282354Z - 290130Z

The severe weather threat for Severe Thunderstorm Watch 558
continues.

SUMMARY...Some damaging wind threat may persist east of watch 558.
No downstream watch is expected.

DISCUSSION...Thunderstorm activity across central Maryland has
organized somewhat over the last hour and therefore led to a greater
damaging wind threat than previously expected. However, storms have
likely reached their peak intensity and should wane through the
evening. Around 25 knots of effective shear (per LWX VWP) and 2500
to 3000 J/kg of MLCAPE may be sufficient to support some damaging
wind threat, potentially to the Atlantic coast. Given the very moist
low-level airmass (dewpoints in the upper 70s), the threat may
persist past sunset for a couple hours. After coordination with the
NWS office in Mount Holly, consensus was for no downstream watch due
to the limited spatial and temporal nature of the threat.

..Bentley/Grams.. 07/28/2023

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...PHI...AKQ...LWX...

LAT...LON   39557607 39887550 39967494 39677442 39237446 38777481
            38357526 38427593 38497631 38947636 39557607 

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