Skip Navigation Links weather.gov 
NOAA logo-Select to go to the NOAA homepage NOAA's National Weather Service   Select to go to the NWS homepage
Storm Prediction Center
navigation bar left  
  navigation bar end cap


 
USA.gov is the U.S. Government's official Web portal to all Federal, state and local government Web resources and services.

Mesoscale Discussion 654
< Previous MD         Next MD >
MD 654 graphic

   MESOSCALE DISCUSSION 0654
   NWS STORM PREDICTION CENTER NORMAN OK
   1219 PM CDT THU MAY 22 2014

   AREAS AFFECTED...PARTS OF THE MID-ATLANTIC REGION

   CONCERNING...SEVERE THUNDERSTORM WATCH 172...

   VALID 221719Z - 221915Z

   THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 172
   CONTINUES.

   SUMMARY...SEVERE STORMS ARE COMMENCING WITHIN PORTIONS OF WW 172.
   SEVERE TSTM WATCH ISSUANCE FARTHER S ACROSS PARTS OF MD/DE/DC/VA IS
   LIKELY BY 19Z.

   DISCUSSION...INITIAL STORM DEVELOPMENT HAS OCCURRED FROM ERN/SRN NY
   INTO CNTRL PA...WITHIN AN INCREASINGLY FAVORABLE ENVIRONMENT FOR
   ISOLATED SEVERE HAIL AND DAMAGING WINDS. EVEN STRONGER HEATING HAS
   OCCURRED S OF THE PA BORDER WHERE 17Z SURFACE TEMPERATURES HAVE
   RISEN INTO THE LOWER TO MIDDLE 80S. MODIFIED 12Z IAD RAOB SUGGESTS
   INHIBITION IS NOW NEGLIGIBLE. AREAS OF CLUMPING CU EVIDENT IN 1-MIN
   RESOLUTION VISIBLE IMAGERY FROM S-CNTRL PA TO CNTRL VA SHOULD EVOLVE
   INTO ISOLATED TO SCATTERED STORMS BY 19-20Z...LARGELY SUPPORTED BY
   CONVECTION-ALLOWING GUIDANCE. WITH A MID-LEVEL SPEED MAX
   CHARACTERIZED BY 500 MB WINDS AOA 50 KT OVERSPREADING FROM THE
   MIDWEST/OH VALLEY...DEEP-LAYER SPEED SHEAR WILL BE FAVORABLE FOR
   ORGANIZED UPDRAFTS DESPITE A PREDOMINATELY WEAK AND WLY COMPONENT TO
   LOW-LEVEL FLOW. ISOLATED OCCURRENCES OF SEVERE HAIL AND DAMAGING
   WINDS APPEAR LIKELY AS FAR S AS THE VA TIDEWATER.

   ..GRAMS/HART.. 05/22/2014


   ATTN...WFO...OKX...ALY...PHI...BGM...AKQ...BUF...CTP...LWX...
   RNK...

   LAT...LON   39877743 41717705 42367696 42697662 43547546 43487445
               42987365 41777401 38767516 37617563 37127605 37087673
               37267792 37447845 37717855 38937784 39877743 

Top/All Mesoscale Discussions/Forecast Products/Home
Weather Topics:
Watches, Mesoscale Discussions, Outlooks, Fire Weather, All Products, Contact Us

NOAA / National Weather Service
National Centers for Environmental Prediction
Storm Prediction Center
120 David L. Boren Blvd.
Norman, OK 73072 U.S.A.
spc.feedback@noaa.gov
Page last modified: May 22, 2014
Disclaimer
Information Quality
Help
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities