Monday, February 22, 2016

SPC Day 2 Risk Upgraded

As promised, here is the updated Day 2 Convection Outlook from the SPC.




   DAY 2 CONVECTIVE OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   1115 AM CST MON FEB 22 2016

   VALID 231200Z - 241200Z

   ...THERE IS A MDT RISK OF SVR TSTMS FROM PORTIONS OF SERN LA INTO
   SRN PARTS OF MS/AL AND THE FL PANHANDLE...

   ...THERE IS AN ENH RISK OF SVR TSTMS FROM CNTRL LA EWD INTO CNTRL AL
   AND INTO SWRN GA AND THE FL PANHANDLE...

   ...THERE IS A SLGT RISK OF SVR TSTMS ACROSS SERN TX EWD INTO
   MS/AL/GA AND THE FL BIG BEND...

   ...THERE IS A MRGL RISK OF SVR TSTMS SURROUNDING THE SLIGHT RISK...

   ...THERE IS A MRGL RISK OF SVR TSTMS FOR PORTIONS OF COASTAL SC...

   ...SUMMARY...
   SEVERE THUNDERSTORMS CAPABLE OF DAMAGING WINDS AND TORNADOES WILL BE
   LIKELY OVER PORTIONS OF THE GULF COAST STATES TUESDAY.  A FEW OF THE
   TORNADOES MAY BE STRONG...ESPECIALLY TUESDAY AFTERNOON AND INTO
   TUESDAY NIGHT.

   ...SE TX EWD ACROSS THE CNTRL GULF COAST AND INTO GA/FL...
   A SPEED MAX OVER THE RIO GRANDE VALLEY WILL ROUND THE BASE OF AN
   INTENSIFYING MID-LEVEL TROUGH/EVOLVING CLOSED LOW AS IT MOVES INTO
   THE CNTRL GULF COAST AFTER DARK.  RAPID INTENSIFICATION OF A SURFACE
   LOW IS EXPECTED FROM SERN TX NEWD INTO NRN MS/WRN TN DURING THE
   PERIOD.  A FRONTAL ZONE LOCATED OVER THE REGION DURING THE DAY 1
   PERIOD IS FORECAST TO ADVANCE NWD FROM THE CNTRL GULF COASTAL REGION
   FARTHER N INTO THE LOWER MS VALLEY.  SHOWER/STORM ACTIVITY WILL
   LIKELY BE ONGOING TUESDAY MORNING ACROSS PORTIONS OF ERN/SERN TX
   WITHIN A STRENGTHENING WAA REGIME.  ALL HAZARDS MAY ACCOMPANY THE
   STRONGER STORMS ACROSS TX BEFORE A COLD FRONT SWEEPS SEWD THROUGH
   THE REGION BY THE EARLY AFTERNOON.  AS WEAK TO MODERATE BUOYANCY
   DEVELOPS INLAND...A MORE SUBSTANTIAL SEVERE RISK WILL DEVELOP DURING
   THE DAY COINCIDENT WITH SURFACE HEATING ACROSS THE LOWER MS VALLEY. 

   A MESSY MODE AND MIX OF SUPERCELLS AND LINE SEGMENTS WILL LIKELY
   EVOLVE BOTH NEAR THE EWD-SWEEPING COLD FRONT AND WITH MORE CELLULAR
   ACTIVITY IN CLUSTERS WITHIN ONE OR MORE PRE-FRONTAL CONFLUENCE
   BANDS.  WITH TIME...DMGG WINDS AND THE POTENTIAL FOR TORNADOES WILL
   INCREASE AS SHEAR PROFILES UNDERGO FURTHER STRENGTHENING /EFFECTIVE
   SRH 300-500+ M2 PER S2/.  DESPITE STRENGTHENING FORCING FOR ASCENT
   OWING IN PART TO THE ARRIVAL OF STRONGER MID-LEVEL HEIGHT
   FALLS...VERY STRONG CROSS-BOUNDARY FLOW AND 70+ KT OF MID-LEVEL FLOW
   OVERSPREADING THE WARM SECTOR WILL SUPPORT A CONTINUED RISK FOR
   TORNADIC SUPERCELLS --ALONG WITH THE RISK FOR A COUPLE OF STRONG
   TORNADOES-- AFTER DARK AS THE SEVERE THREAT SHIFTS EWD.

   ...COASTAL SC...
   A MARGINAL SEVERE RISK MAY DEVELOP LATE OVERNIGHT TUESDAY AS
   MOISTURE OVER THE GULF STREAM SPREADS INLAND AND ACTS TO DESTABILIZE
   THE AIR MASS ACROSS THIS REGION.  SHEAR PROFILES WILL SUPPORT STORM
   ORGANIZATION BUT MODEST BUOYANCY WILL TEND TO LIMIT THE OVERALL
   SEVERE THREAT.

   ..SMITH.. 02/22/2016

Take note of how they mention the threat continues after dark.  If you know anyone in the highlighted regions above, please let them know the severity of the situation.

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