STORM PREDICTION CENTER...NWS/NCEP...NORMAN OK 
   DAY 1 CONVECTIVE OUTLOOK...REF AWIPS GRAPHIC PGWE46 KWNS.
   
   VALID 181300Z - 191200Z
   
   THERE IS A SLGT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM
   35 SSW P07 20 ENE FST 45 NW BGS 25 W CDS 25 NW END 25 WSW EMP MHK
   15 E CNK 10 W HSI 10 NNE BUB 45 SSW MHE 10 S BKX 20 N MKT
   30 NNE RST 35 SSE LSE 35 E DBQ 25 NNW PIA 30 ESE UIN 40 ENE JEF
   25 W TBN 15 NNW FYV 20 ENE MLC 40 WSW DUA 15 SSE MWL 40 SSW BWD
   35 S JCT 55 SSE DRT.
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 45 W MRF 25 W INK
   60 SSE CVS 50 NE AMA 30 NE LBL 25 W GCK 10 W LAA 15 NNW TAD
   55 NE 4SL 30 SSW GNT 55 E PHX GBN 20 S BLH 20 NNW DAG 40 N NID
   20 NE BIH 35 NW U31 OWY 40 NNE SUN 30 NNW BZN 80 ENE HVR
   ...CONT... 60 NE ISN 10 ENE ISN 25 NW DIK 25 WSW Y22 10 W MBG
   30 SSE JMS 40 WSW BJI 30 NW HIB 70 N IWD 25 SSE MQT 25 W TVC
   20 NW AZO 40 N LAF 15 SE BLV 45 SSW UNO 25 E PGO 45 SW PRX
   15 NW ACT 30 N HDO 55 WSW COT.
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM PIE 40 SSE CTY
   25 N CTY 10 NE ABY 40 WNW MCN 65 S TYS 25 N TRI 10 ESE SSU
   20 SSE CHO 15 NNW ORF.
   
   
   
   ...LOWER MO VALLEY/MID MS VALLEY...
   
   LATEST SATELLITE IMAGERY AND RADAR DATA SUGGEST CENTER OF UPPER
   CIRCULATION IS LOCATED OVER NERN CO...LIFTING NEWD TOWARD CENTRAL
   NEB.  AHEAD OF THIS FEATURE...BROADENING ZONE OF ELEVATED
   THUNDERSTORMS CONTINUES TO EXPAND EWD ACROSS SERN NEB/ERN KS ON
   NOSE OF LLJ.  IT APPEARS WARM ADVECTION WILL DRIVE A SUBSTANTIAL
   PORTION OF DAYTIME CONVECTION ACROSS OUTLOOK AREA AS DEVELOPING
   WARM FRONT BECOMES ESTABLISHED ALONG THE NEB/KS BORDER...EWD INTO
   NRN MO.  BOUNDARY LAYER MOISTURE RETURN ACROSS THE WARM SECTOR HAS
   YET TO RECOVER SIGNIFICANTLY...WITH 60F DEW POINTS CONFINED TO
   TX...AND 50S ACROSS SRN HALF OF OK.  REASONABLE RETURN RATES
   SUGGEST THIS AIR MASS WILL NOT SURGE INTO SERN NEB AHEAD OF UPPER
   SHORTWAVE/VORT MAX THIS AFTERNOON.  RESULTANT MARGINAL INSTABILITY
   WILL LIKELY LIMIT COVERAGE/INTENSITY OF RENEWED THUNDERSTORM
   DEVELOPMENT...WARRANTING SLIGHT RISK COVERAGE.  EVEN SO...VERTICAL
   SHEAR PROFILES WILL UNDOUBTEDLY ENCOURAGE ROTATION FOR ANY UPDRAFTS
   THAN CAN DEVELOP.  LARGE HAIL APPEARS TO BE THE PRIMARY SEVERE
   THREAT AS ACTIVITY SPREADS NEWD AHEAD OF SHORTWAVE TROUGH.  AFTER
   BAND OF ELEVATED STORMS PASS IN RESPONSE TO WARM CONVEYOR BELT THIS
   MORNING...ADDITIONAL CONVECTION SHOULD DEVELOP LATER THIS AFTERNOON
   ACROSS SERN NEB...THEN SPREAD INTO IA THIS EVENING.
   
   
   ...SRN PLAINS...
   
   MID LEVEL CAA IN WAKE OF CENTRAL PLAINS SHORTWAVE TROUGH PASSAGE
   WILL SOON GIVE WAY TO INCREASING WARM ADVECTION REGIME ACROSS THE
   SRN PLAINS.  BOUNDARY LAYER MOISTURE IS BEGINNING TO LIFT NWD
   ACROSS TX WITH 60F DEW POINTS SURGING INTO THE EDWARDS
   PLATEAU...AND AS FAR NORTH AS THE DFW METROPLEX.  STRONG HEATING IS
   EXPECTED THIS AFTERNOON ALONG THE DRY LINE...ESPECIALLY NORTH OF
   CIRRUS SHIELD ASSOCIATED WITH SRN BRANCH OF STRONGER FLOW.  IT
   APPEARS DEEP THERMALS WILL DEVELOP ALONG THE DRY LINE LATER THIS
   AFTERNOON WHERE MODERATE SFC-BASED INSTABILITY SHOULD EXIST...1500-
   2500 J/KG.  GIVEN EXPECTED DEEP LAYER SHEAR...45-50KT BETWEEN SFC-
   6KM...SUPERCELLS SHOULD DEVELOP.  INITIATION MAY OCCUR SOMEWHAT
   EARLY ALONG THE DRYLINE WITH CONVECTION POSSIBLE BETWEEN 19-20Z
   FROM SJT TO ABI...THEN NEWD INTO CENTRAL OK BETWEEN 00-03Z. 
   FORECAST SOUNDINGS FAVOR LARGE HAIL WITH ANY STORMS THAT MAINTAIN
   STRUCTURE.  THIS ACTIVITY SHOULD SPREAD NEWD ACROSS OK INTO
   PORTIONS OF SWRN MO LATE TONIGHT AS LLJ INCREASES IN RESPONSE TO
   UPSTREAM TROUGH.
    
   ..DARROW.. 04/18/03
   
   NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED FOR 1630Z