mardi 29 avril 2014

Apr 29, 2014 0600 UTC Day 1 Convective Outlook,,,,,,,,,,,,,,,,,,,,,,,,,,,,,http://www.spc.noaa.gov/products/outlook/day1otlk.html

VALID 291200Z - 301200Z
   ...THERE IS A MDT RISK OF SVR TSTMS ACROSS PORTIONS OF AL AND ERN
   MS...

   ...THERE IS A SLGT RISK OF SVR TSTMS ACROSS A LARGE PORTION OF THE
   ERN U.S. E OF THE MS VALLEY...

   ...SUMMARY...
   WIDESPREAD THUNDERSTORMS ARE FORECAST ACROSS THE CENTRAL GULF COAST
   REGION...WITH SEVERAL SEVERE/SUPERCELL STORMS POSSIBLE -- ALONG WITH
   ATTENDANT RISK FOR HAIL...DAMAGING WINDS...AND TORNADOES. 
   STRONG/SEVERE STORMS ARE ALSO EXPECTED ACROSS SOUTHERN VIRGINIA AND
   THE CAROLINAS...WHERE HAIL AND DAMAGING WINDS ARE EXPECTED ALONG
   WITH THE POTENTIAL FOR A TORNADO OR TWO.  SHOWERS AND ISOLATED
   THUNDERSTORMS -- ALONG WITH RISK FOR HAIL AND LOCALLY DAMAGING WINDS
   -- WILL ALSO DEVELOP ACROSS PARTS OF THE MID OHIO VALLEY AND NORTH
   INTO SOUTHERN LOWER MICHIGAN DURING THE AFTERNOON.

   ...SYNOPSIS...
   A LARGE MID- AND UPPER-LEVEL LOW OVER THE LOWER MO VALLEY VICINITY
   WILL DRIFT SLOWLY NWD WITH TIME...WITH A BROAD ZONE OF STRONG
   CYCLONIC FLOW SURROUNDING THIS SYSTEM.  AT THE SURFACE...AN OCCLUDED
   LOW IS PROGGED TO LINGER INVOF THE ERN IA/NRN IL VICINITY MUCH OF
   THE PERIOD...WITH A TRAILING COLD FRONT TO MAKE SLOW EWD PROGRESS
   ACROSS THE MID OH AND TN VALLEYS/CENTRAL GULF COAST REGION.  AREAS
   AHEAD OF THIS BOUNDARY WILL AGAIN FALL UNDER A RISK FOR FAIRLY
   WIDESPREAD SEVERE STORMS.

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