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Apr-14-2003 1300 UTC Day 1 Convective Outlook
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1300 UTC Day 1 Outlook Graphic
      
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   STORM PREDICTION CENTER...NWS/NCEP...NORMAN OK 
   DAY 1 CONVECTIVE OUTLOOK...REF AWIPS GRAPHIC PGWE46 KWNS.
   
   VALID 141300Z - 151200Z
   
   THERE IS A SLGT RISK OF SVR TSTMS TO THE RIGHT OF A LINE FROM
   15 NNW MQT 40 NNW IMT 50 SW IWD 30 E STC 10 WSW STC 30 WNW STC
   15 SW BRD 30 S HIB 50 SE ELO.
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM OTH 40 ESE SLE
   15 WSW GEG 55 NNW FCA ...CONT... 85 NW GGW 20 NW GDV 35 SSE 4BQ
   25 NE RWL 10 SE CNY 65 WNW GUP 30 WSW SOW 30 NW TUS 85 SSE GBN.
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 30 NNW APN 40 N TVC
   10 ENE RHI 30 NE RWF 10 N AXN 40 W HIB 20 NNE ELO.
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 50 SSW P07 70 SW P07
   15 W FST 50 N BGS 30 WNW ABI 40 NE JCT 25 SE DRT.
   
   ...EAST CENTRAL MN/FAR NWRN WI/WRN U.P. OF MI...
   EARLY MORNING SURFACE ANALYSIS SHOWS AN AREA OF LOW PRESSURE OVER
   ONTARIO WITH A COLD FRONT EXTENDING SWWD THROUGH NRN MN TO NRN SD. 
   AS AN UPPER LEVEL SHORT WAVE...CURRENTLY OVER NRN ONTARIO...MOVES
   EWD TODAY...A COLD FRONT SOUTH OF THE U.S./CANADIAN BORDER WILL
   MOVE SLOWLY SSEWD...REACHING THE WRN U.P. OF MI TO CENTRAL
   MN/CENTRAL SD BY 00Z.  12Z SOUNDINGS FROM ERN NEB INTO SRN MN SHOWS
   BOUNDARY LAYER MOISTURE HAS INCREASED DURING THE LAST 12
   HOURS...WITH 50 F SURFACE DEWPOINTS AS FAR NORTH AS SERN SD/NWRN
   IA.  SSWLY LOW-LEVEL FLOW WILL CONTINUE THROUGH THE DAY WITH LOWER
   TO MID 50F SURFACE DEWPOINTS EXPECTED INTO CENTRAL MN/NRN WI ALONG/
   JUST SOUTH OF THE COLD FRONT.  COMBINED WITH AFTERNOON TEMPERATURES
   IN THE UPPER 70S TO MID 80S...EXPECT MUCAPE VALUES FROM 1000-1500
   J/KG. FORECAST SOUNDINGS CONTINUE TO SHOW A STRONG CAP WILL PREVENT
   CONVECTION FROM DEVELOPING UNTIL LATE IN THE AFTERNOON...OR MORE
   LIKELY AFTER 00Z...WHEN LOW-LEVEL CONVERGENCE INCREASES ALONG THE
   COLD FRONT AND ANOTHER WEAK UPPER SHORT WAVE TROUGH MOVES INTO THIS
   AREA FROM THE WEST.  DEEP LAYER SHEAR WILL SUPPORT ROTATING
   UPDRAFTS WITH ANY STORMS THAT DEVELOP...WITH STEEP LAPSE RATES/LOW
   WET-BULB ZERO HEIGHTS FAVORING LARGE HAIL AS THE PRIMARY THREAT.  
   
   ...SRN CA COAST...
   UPPER TROUGH ALONG/JUST OFF THE NRN/CENTRAL CA COAST AND ASSOCIATED
   SHORT WAVE TROUGH/BAROCLINIC ZONE WILL MOVE INLAND OVER SRN CA BY
   00Z AND THEN INTO THE LOWER CO RIVER VALLEY TO WRN AZ OVERNIGHT. 
   ETA/ETAKF FORECAST SOUNDINGS INDICATE CAPE VALUES AROUND 500 J/KG
   ...SUPPORTING LOW-TOPPED CONVECTION AS THE FRONT MOVES ONSHORE SRN
   CA WITH INCREASING LAPSE RATES/LOW WET-BULB ZERO HEIGHTS FAVORING
   HAIL WITH THE STRONGEST STORMS.
   
   ...SWRN TX...
   ALTHOUGH MODELS SHOW WARM MID-LEVEL TEMPERATURES OVER WRN TX
   TODAY...LOW-LEVEL CONVERGENCE IS EXPECTED TO BE MAXIMIZED OVER SWRN
   TX THROUGH THE DAY ALONG A DRY LINE...WHERE LOW-MID 50F SURFACE
   DEWPOINTS WILL BE MAINTAINED.  AS CAPPING INVERSION BREAKS LATER
   THIS AFTERNOON... GIVEN STRONG SURFACE HEATING...THUNDERSTORMS ARE
   EXPECTED TO REDEVELOP DURING THE MID-LATE AFTERNOON.  ACTIVITY
   SHOULD WEAKEN WITH THE LOSS OF DAY TIME HEATING.
    
   ..PETERS.. 04/14/03
   
   NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED FOR 1630Z
        
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