Mesoscale Discussion 1376
NWS Storm Prediction Center Norman OK
0553 AM CDT Sun Aug 02 2020
Areas affected...eastern Pennsylvania...northern New
Jersey...southern New York
Concerning...Severe potential...Watch unlikely
Valid 021053Z - 021330Z
Probability of Watch Issuance...20 percent
SUMMARY...Locally severe wind gusts are possible over northeast
Pennsylvania into northern New Jersey this morning. A brief tornado
is possible if the storm cluster continues to intensify.
DISCUSSION...Storms over eastern PA have gradually intensified over
the past hour, acquiring broad rotation as they translate
east/northeast along the lifting warm front. Surface analysis shows
72 to 74 F dewpoints which is contributing to around 1000 J/kg
SBCAPE.
Area VWPs and objective analysis show 0-1 SRH between 100-150 m2/s2,
which is typically sufficient for a low-end tornado risk.
Damaging wind gusts appear possible with this isolated storm
cluster. Should the system continue to get better organized, further
tightening of the circulation may occur, with a brief tornado
possible. However, this would appear most likely later today when
heating occurs and boundary layer lapse rates become more favorable.
..Jewell/Grams.. 08/02/2020
...Please see www.spc.noaa.gov for graphic product...
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ATTN...WFO...OKX...PHI...BGM...
LAT...LON 40617573 41017534 41317486 41357446 41157422 40817410
40527428 40427483 40367522 40407556 40477571 40617573
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