SPC AC 210033
   
   DAY 1 CONVECTIVE OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   0633 PM CST TUE DEC 20 2005
   
   VALID 210100Z - 211200Z
   
   GEN TSTMS ARE FCST TO THE RIGHT OF A LINE FROM 55 NW 4BK 15 W MFR 35
   ENE MHS 45 W RNO 25 NE MER 40 WSW FAT 90 W VBG.
   
   ...NO SVR TSTM AREAS FORECAST...
   
   ...SW ORE TO CNTRL CA...
   
   CURRENT WATER VAPOR IMAGERY AND VWP DATA INDICATE SHORTWAVE TROUGH
   AND ASSOCIATED 70 KT MID-LEVEL JET STREAK MOVING ONTO THE NRN CA/SRN
   ORE COASTS.  TSTMS HAVE RECENTLY BECOME MORE NUMEROUS OVER THE
   SACRAMENTO VALLEY INVOF SAC...LIKELY IN RESPONSE TO THE INCREASED
   LARGE-SCALE FORCING FOR ASCENT DOWNSTREAM FROM THIS SHORTWAVE
   TROUGH.  INSPECTION OF 00Z OAK SOUNDING INDICATED THE PRESENCE OF
   MODESTLY STEEP MID-LEVEL LAPSE RATES /AROUND 7 C/KM/ WHICH WERE
   LARGELY CONTRIBUTING TO WEAK ELEVATED INSTABILITY FOR PARCELS LIFTED
   FROM AROUND 1.5 KM AGL.
   
   WHILE SOME SMALL HAIL MAY ACCOMPANY THE STRONGEST STORMS FOR THE
   NEXT COUPLE OF HOURS...IT APPEARS THAT THE MARGINAL INSTABILITY WILL
   LIMIT A MORE ORGANIZED SEVERE THREAT THIS EVENING.
   
   SHORTWAVE TROUGH AND ASSOCIATED REGION OF FORCING ARE FORECAST TO
   MOVE RAPIDLY INTO THE NRN ROCKIES OVERNIGHT...WITH TSTM POTENTIAL
   DECREASING ACROSS DISCUSSION AREA AFTER 03Z OR 04Z.
   
   ..MEAD.. 12/21/2005
   
   ...NOTICE...
   THE STATION RELATIVE POINTS IN THIS PRODUCT WILL BE
   DISCONTINUED ON 14 FEBRUARY 2006 BUT WILL REMAIN AVAILABLE
   IN THE FOLLOWING PRODUCTS:
   
      WMO HEADER:       AWIPS ID:
      WUUS01            PTSDY1
      WUUS02            PTSDY2
      WUUS03            PTSDY3
   
   A SERVICE CHANGE NOTICE ...SCN05-39... PROVIDES DETAILS
   ON THE TRANSITION. FOR ADDITIONAL DETAILS SEE THE FOLLOWING
   WEB ADDRESS USING LOWER CASE LETTERS:
   WWW.NWS.NOAA.GOV/OM/NOTIF.HTM
   
   CLICK TO GET WUUS01 PTSDY1 PRODUCT

   NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 0600Z