ACUS11 KWNS 222045
SWOMCD
SPC MCD 222045=20
NJZ000-PAZ000-DEZ000-MDZ000-222215-

Mesoscale Discussion 1260
NWS Storm Prediction Center Norman OK
0345 PM CDT Mon Jun 22 2026

Areas affected...southeast PA into NJ

Concerning...Severe Thunderstorm Watch 375...

Valid 222045Z - 222215Z

The severe weather threat for Severe Thunderstorm Watch 375
continues.

SUMMARY...Supercell thunderstorm risk increasing. Damaging winds,
hail, and possibly a tornado could accompany this activity across
far southeast Pennsylvania into southern New Jersey over the next
1-2 hours.

DISCUSSION...A supercell storm has developed across southeast PA
this afternoon within a favorably sheared and unstable environment.
Surface observations indicate potential outflow oriented west to
east across the area from earlier storms. While the downstream
airmass itself will support a severe risk, if this supercell can
maintain organization and interact with this outflow boundary (where
0-1 km SRH would be enhanced), an increasing risk for a tornado also
could occur in addition to damaging wind and isolated hail.=20

An additional storm approaching northern DE also will be moving into
a more favorable airmass supporting strong to damaging wind gusts
over the next hour.

..Leitman.. 06/22/2026

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!-0d7vUqW-Rrj3MteFaXJMmi2-TiRMIKt6YVjh_rlsYXzFgNy7FG3QN-FccOH3ZoG0ommYXtdq= djNnisx2X6t_22fjo8$ for graphic product...

ATTN...WFO...PHI...CTP...LWX...

LAT...LON 40387566 40357472 40097417 39627405 39407438 39387486
39437597 39687630 40257601 40387566=20

MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH
MOST PROBABLE PEAK WIND GUST...55-70 MPH
MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN


=3D =3D =3D
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