ZCZC SPCSWODY1 ALL
ACUS01 KWNS 170055
SPC AC 170054

STORM PREDICTION CENTER...NWS/NCEP...NORMAN OK 
DAY 1 CONVECTIVE OUTLOOK...REF AWIPS GRAPHIC PGWE46 KWNS.

VALID 170100Z - 171200Z

NO SVR TSTM AREAS FCST.

GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 10 ESE GPT
20 ESE TOI 30 NE SSI.

GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 15 S ONP 30 SSE BNO
25 SSE ENV 15 S LND 30 W DIK 65 N ATY 10 NE RHI 15 NNW MTW
10 NNW P35 50 ENE TUL 35 WNW TYR 40 ENE AUS 25 E JCT 25 NNW FST
20 WSW PVW 55 NNE ROW 45 N DUG 40 S RAL.

...CNTRL/SRN FL...
SEABREEZE TSTMS HAVE DIMINISHED THIS EVENING.  BUT...LOOKING
UPSTREAM...TSTM LINE SEGMENTS CONTINUE TO MOVE EWD ACROSS THE ERN
GULF OF MX PER NLDN AND IR IMAGERY...AIDED BY MIDLEVEL SHORTWAVE
TROUGH.  IT IS CONCEIVABLE THAT AS THESE TSTMS APPROACH THE FL
PENINSULA...ISOLD DAMAGING WINDS OR HAIL MAY OCCUR.  THIS WILL
PRIMARILY BE THE CASE ACROSS CNTRL/SRN FL ALONG AND SOUTH OF WARM
FRONT.  THREAT APPEARS TO BE ISOLD ENOUGH TO PRECLUDE SLGT RISK...
BUT DOES JUSTIFY LOW SEVERE PROBABILITIES.  

...CNTRL/SRN PLAINS...
TSTM INITIATION DID NOT OCCUR ALONG THE DRYLINE THIS AFTERNOON
GIVEN WEAK SURFACE CONVERGENCE AND FORMIDABLE CINH IN PLACE. 
UPSTREAM SHORTWAVE TROUGH...EVIDENT OVER FAR W TX...AND DEVELOPMENT
OF 35-40 KT SSWLY LLJ MAY AID IN ELEVATED TSTM THREAT LATE TONIGHT
ACROSS PORTIONS OF W TX INTO OK.  STEEP LAPSE RATES MAY ENCOURAGE
MARGINALLY SEVERE HAIL IN THE STRONGER STORMS...BUT COVERAGE WILL
BE ISOLD...AND APPEARS NOT TO JUSTIFY A SLGT RISK.

...NRN HIGH PLAINS...
MIDLEVEL SHORTWAVE TROUGH APPEARS TO BE MOVING NNEWD THROUGH THE
CNTRL ROCKIES ATTM AND WILL MOVE TOWARD THE NRN HIGH PLAINS BY LATE
TONIGHT.  LARGE SCALE ASCENT WILL SPREAD OVER PARTS OF WRN NEB AND
WRN SD VERY LATE TONIGHT...WITH LLJ RESPONDING AND INCREASING TO
40-45 KTS.  MODIFIED 00 UTC RAP SOUNDING SUGGESTS MUCAPES WILL
APPROACH 1000 J/KG AND GIVEN STEEP LAPSE RATES...A FEW TSTMS ARE
POSSIBLE.  A FEW TSTMS MAY PRODUCE ISOLD...MARGINALLY SEVERE HAIL.

..RACY.. 03/17/03
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