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Mesoscale Discussion 1587
NWS Storm Prediction Center Norman OK
0254 AM CDT Mon Jul 25 2022

Areas affected...Portions of western/central PA

Concerning...Tornado Watch 501...

Valid 250754Z - 250930Z

The severe weather threat for Tornado Watch 501 continues.

SUMMARY...An isolated severe threat should continue to diminish this
morning.

DISCUSSION...A line of thunderstorms present over parts of
western/central PA will continue to move eastward over the next
couple of hours. Adequate instability for robust convection is
present across this region, with MLCAPE up to 1000 J/kg. 35-40 kt of
deep-layer shear is also supporting convective organization. But,
recent observations suggest that strong/gusty winds are struggling
to reach the surface owing to the presence of some convective
inhibition. This MLCIN increases with eastward extent into central
PA. Current expectations are for the isolated severe threat ongoing
with the line to gradually diminish over the next 1-2 hours as it
encounters a less favorable thermodynamic environment. Still,
occasional damaging winds and perhaps a brief tornado remain
possible until this weakening occurs.

..Gleason.. 07/25/2022

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

ATTN...WFO...CTP...PBZ...

LAT...LON   40838009 41287915 41937734 41947694 41477734 41127812
            40597941 40838009