[SWODY1] SWODY1

[Severe Weather Outlook Day 1]

ACUS01 KWNS 210035
SWODY1
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