SPC MD 1390

MD 1390 CONCERNING SEVERE POTENTIAL...TORNADO WATCH LIKELY FOR MUCH OF EASTERN VIRGINIA...MARYLAND...DELAWARE

Mesoscale Discussion 1390
NWS Storm Prediction Center Norman OK
1241 AM CDT Tue Aug 04 2020

Areas affected...much of eastern Virginia...Maryland...Delaware

Concerning...Severe potential...Tornado Watch likely 

Valid 040541Z - 040815Z

Probability of Watch Issuance...95 percent

SUMMARY...The threat for tornadoes will develop north across eastern
Virginia and the Chesapeake region, and a new watch is likely.

DISCUSSION...Bands of supercells with tornado threat persist over
eastern NC northeast of the cyclone center. Objective analysis shows
effective SRH 300-500 m2/s2 in this area, where MLCAPE is around
1000 J/kg. A moist air mass is already in place downstream from VA
into the Chesapeake. Thus, the rapid increase in low-level shear is
likely to support a continued tornado threat tonight and into the
early morning hours.

..Jewell/Grams.. 08/04/2020

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

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

LAT...LON   37377731 38927713 39397685 39537645 39567593 39457570
            39077527 38797499 38487496 37927520 37317556 37097581
            36977630 36887685 37007721 37377731 

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from SPC Forecast Products http://www.spc.noaa.gov/products/md/md1390.html