Sunday, June 2, 2013

SPC Could Issue Severe Thunderstorm Watch

Mesoscale Discussion 937
< Previous MD
MD 937 graphic
   MESOSCALE DISCUSSION 0937
   NWS STORM PREDICTION CENTER NORMAN OK
   0218 PM CDT SUN JUN 02 2013

   AREAS AFFECTED...PARTS OF THE MID-ATLANTIC

   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE 

   VALID 021918Z - 022145Z

   PROBABILITY OF WATCH ISSUANCE...40 PERCENT

   SUMMARY...ISOLATED/MARGINALLY SEVERE TSTMS IN THE LEE OF THE CNTRL
   APPALACHIANS MAY DEVELOP EWD TOWARDS THE I-95 CORRIDOR THIS EVENING.

   DISCUSSION...A FEW TSTMS HAVE DEVELOPED ACROSS FAR NRN VA/ERN WV
   PANHANDLE...WITH ADDITIONAL AGITATED CU NOTED ON VISIBLE SATELLITE
   IMAGERY NEWD INTO ERN PA. WITH THE SHORTWAVE TROUGH AXIS EVIDENT IN
   WATER VAPOR IMAGERY RUNNING FROM THE LEE OF LK ONTARIO INTO NERN
   PA...THERE IS SOME UNCERTAINTY AS TO THE DEGREE OF TSTM COVERAGE IN
   THE NEXT FEW HOURS GIVEN THE DAMPENING/NEWD MOVEMENT OF THE TROUGH
   AWAY FROM THE REGION. STILL...A MODESTLY UNSTABLE AIR MASS WITH
   MLCAPE NEAR 1000 J/KG AMIDST PREVALENT MIDDLE 80S SURFACE
   TEMPERATURES COULD FOSTER FURTHER DEVELOPMENT. WITH THE REGION LYING
   ON THE PERIPHERY OF THE STRONGER MID-LEVEL SWLYS...A FEW MARGINALLY
   ORGANIZED TSTMS SHOULD POSE A RISK OF ISOLATED SEVERE HAIL AND
   DAMAGING WINDS.

   ..GRAMS/WEISS.. 06/02/2013


   ATTN...WFO...OKX...PHI...BGM...AKQ...CTP...LWX...

   LAT...LON   41387505 41067436 40627442 39257542 38187672 38107744
               38357840 38757855 39447782 40777644 41287583 41387505 

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