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 517
< Previous MD         Next MD >
MD 517 graphic

   MESOSCALE DISCUSSION 0517
   NWS STORM PREDICTION CENTER NORMAN OK
   0451 PM CDT SAT APR 30 2016

   AREAS AFFECTED...NERN AL / SRN MIDDLE AND SERN TN / NWRN GA

   CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY 

   VALID 302151Z - 302245Z

   PROBABILITY OF WATCH ISSUANCE...20 PERCENT

   SUMMARY...AN ISOLD SEVERE RISK MAY CONTINUE FOR THE NEXT COUPLE OF
   HOURS WITH STORMS EXHIBITING TRANSIENT SUPERCELL STRUCTURES.  THE
   MAIN THREATS WITH THIS ACTIVITY WILL BE THE POSSIBILITY FOR A FEW
   DAMAGING WIND GUSTS...SMALL HAIL...AND PERHAPS A BRIEF/WEAK TORNADO.

   DISCUSSION...RADAR IMAGERY OVER NRN AL NEWD INTO SERN TN SHOWS
   SEVERAL WEAK SUPERCELLS WITHIN A CORRIDOR OF WEAK TO MODERATE
   BUOYANCY /750-1250 J PER KG MLCAPE/.  ALTHOUGH LOW-LEVEL FLOW IS
   GENERALLY UNIDIRECTIONAL FROM THE SSW...SPEED SHEAR WITH HEIGHT IS A
   COMPENSATING FACTOR AND LEADING TO A WIND PROFILE SUPPORTIVE OF
   ORGANIZED STORMS...INCLUDING SHORTER-LIVED AND GENERALLY WEAK
   UPDRAFT ROTATION.  THIS ACTIVITY WILL CONTINUE TO SPREAD TO THE NE
   ACROSS THE TRI-STATE REGION AHEAD OF A DRYSLOT/MID-LEVEL VORTICITY
   LOBE FORECAST TO MOVE ACROSS THE TN VALLEY/MID SOUTH THIS EVENING. 
   A FEW DAMAGING WIND GUSTS...SMALL HAIL...AND PERHAPS A WEAK
   SUPERCELL TORNADO THREAT MAY ACCOMPANY THE STRONGER STORMS.

   ..SMITH/HART.. 04/30/2016


   ATTN...WFO...MRX...FFC...OHX...HUN...

   LAT...LON   34798721 35218678 35698472 35148441 34628485 34488677
               34798721 

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: April 30, 2016
Disclaimer
Information Quality
Help
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities