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 190
< Previous MD         Next MD >
MD 190 graphic

   MESOSCALE DISCUSSION 0190
   NWS STORM PREDICTION CENTER NORMAN OK
   0631 AM CDT SUN MAR 16 2014

   AREAS AFFECTED...FAR SRN MS / SWRN AL

   CONCERNING...TORNADO WATCH 30...

   VALID 161131Z - 161300Z

   THE SEVERE WEATHER THREAT FOR TORNADO WATCH 30 CONTINUES.

   SUMMARY...ISOLD DMGG WINDS AND A TORNADO REMAIN POSSIBLE OVER FAR
   SRN MS EWD INTO SWRN AL THROUGH THE MID MORNING HOURS AS A FEW BANDS
   OF STORMS MOVE ACROSS THE AREA.

   DISCUSSION...1125Z RADAR MOSAIC SHOWS A FEW EWD-MOVING BANDS OF
   STORMS GENERALLY ORIENTED SW TO NE ACROSS SRN MS AND SWRN AL.  A
   MARITIME WARM FRONT IS DRAPED FROM NW TO SE ACROSS THIS REGION WITH
   ONLY SLOW NWD ADVANCEMENT OF THE MOIST SURFACE-BASED WARM SECTOR
   INTO THE SRN FEW TIERS OF COUNTIES IN MS AND NEAR THE N SIDE OF
   MOBILE BAY.  THE AIRMASS S OF THIS BOUNDARY IS CHARACTERIZED AS
   ADEQUATELY MOIST FEATURING MID 60S DEWPOINTS AND IS MARGINALLY
   BUOYANT /250-500 J/KG MLCAPE/ DESPITE WEAK SURFACE-0.5 KM LAPSE
   RATES.  SEVERAL DISCRETE SUPERCELLS HAVE FORMED DURING THE PAST HOUR
   OR TWO NEAR THE MS/AL BORDER AND INTO SWRN AL AHEAD OF THE MAIN
   CONVECTIVE BAND OVER SRN MS.  THESE SUPERCELLS HAVE MOVED INTO AN
   INCREASINGLY MARGINAL THERMODYNAMIC ENVIRONMENT BUT HAVE MAINTAINED
   WEAK LOW-LEVEL ROTATION.  FARTHER W OVER SRN MS...A COMPLEX MIX OF
   QLCS AND SUPERCELL STRUCTURE HAVE INTERMITTENTLY YIELDED TRANSITORY
   STRENGTHENING OF LOW-LEVEL CIRCULATIONS WITHIN A SLIGHTLY MORE
   MOISTURE RICH/UNSTABLE ENVIRONMENT.  GIVEN ONLY GRADUAL AIRMASS
   MODIFICATION OVER SRN AL AND LATER IN THE FAR WRN FL
   PENINSULA...EXPECTING THE GENERATION ZONE OF STRONGER UPDRAFTS TO
   CONTINUE OVER SRN MS AND NEAR MOBILE AND STORM ACTIVITY TRACKING
   ENEWD AWAY FROM HIGHER THETA-E NEAR THE IMMEDIATE MS/AL COAST.  AN
   ATTENDANT CONDITIONAL RISK FOR ISOLD DMGG WINDS AND A TORNADO MAY
   ACCOMPANY ANY STRONGER AND/OR LONG-LIVED CIRCULATION.

   ..SMITH.. 03/16/2014


   ATTN...WFO...MOB...JAN...LIX...

   LAT...LON   32058722 31068696 30468789 30368900 30858993 32058722 

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: March 16, 2014
Disclaimer
Information Quality
Help
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities