[SWODY1] SWODY1

[Severe Weather Outlook Day 1]

ACUS01 KWNS 212005
SWODY1
SPC AC 212003

DAY 1 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK
0303 PM CDT FRI APR 21 2006

VALID 212000Z - 221200Z

...THERE IS A SLGT RISK OF SVR TSTMS ACROSS PARTS OF THE CENTRAL
GULF COAST/TN VALLEY REGION...

...CENTRAL GULF COAST REGION INTO THE TN VALLEY...
MODERATE INSTABILITY IS INDICATED ACROSS THE CENTRAL GULF COAST
REGION AND INTO TN THIS AFTERNOON...AHEAD OF VIGOROUS MID-LEVEL VORT
MAX NOW MOVING NEWD ACROSS SERN LA/MS. WITH RELATIVELY STRONG SWLY
MID-LEVEL JET STREAK ON SERN PERIPHERY OF THIS FEATURE...SUFFICIENT
SHEAR EXISTS TO SUPPORT A CONTINUED THREAT ORGANIZED/SUPERCELL
STORMS.  STRONGEST STORMS ATTM EXIST FROM SRN MS NEWD INTO SERN
TN...AND THIS CORRIDOR SHOULD REMAIN THE MOST FAVORABLE ZONE FOR
LOCALLY-DAMAGING WINDS AND HAIL THROUGH THIS AFTERNOON.  THOUGH
SEVERE THREAT MAY EXTEND EWD ACROSS GA LATER THIS EVENING...OVERALL
THREAT SHOULD DIMINISH SLOWLY AFTER SUNSET.

...FL...
MODERATE INSTABILITY BUT WEAK SHEAR IS INDICATED ACROSS THE FL
PENINSULA...WHICH WILL CONTINUE TO SUPPORT THE DEVELOPMENT OF
ISOLATED VIGOROUS/PULSE-TYPE SEVERE STORMS THIS AFTERNOON. 
ACCOMPANYING THREAT FOR HAIL/LOCALLY DAMAGING WINDS SHOULD DIMINISH
THIS EVENING WITH THE LOSS OF DAYTIME HEATING.

...CENTRAL CA...
COOLING ALOFT ASSOCIATED WITH APPROACHING UPPER TROUGH WILL CONTINUE
TO STEEPEN LAPSE RATES ACROSS CENTRAL CA THROUGH THE PERIOD.  THIS
COMBINED WITH DAYTIME HEATING AND DEWPOINTS IN THE 50S IN THE
CENTRAL VALLEY MAY YIELD INSTABILITY SUFFICIENT FOR A FEW STRONGER
STORMS -- POSSIBLY CAPABLE OF PRODUCING ISOLATED/MARGINALLY-SEVERE
HAIL.

..GOSS.. 04/21/2006