[SWODY1] SWODY1

[Severe Weather Outlook Day 1]

ACUS01 KWNS 211619
SWODY1
SPC AC 211617

DAY 1 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK
1017 AM CST TUE FEB 21 2006

VALID 211630Z - 221200Z

...NO TSTM AREAS FORECAST...

...SYNOPSIS...
BROAD NRN STREAM TROUGH WILL DEVELOP OVER THE NRN PLAINS AND GREAT
LAKES TODAY AS A SERIES OF FAST MOVING SHORTWAVE TROUGHS DIG SEWD
OUT OF THE CANADIAN PRAIRIES.  AS THIS OCCURS...SLOW MOVING UPPER
LOW WILL WEAKEN AS IT MOVES ACROSS THE LOWER CO RIVER VALLEY. 
DOWNSTREAM...SRN EDGE OF ARCTIC AIR MASS WILL BEGIN MIXING/ERODING
ALLOWING SLY WINDS TO INCREASE OVER THE WRN/CENTRAL GULF COAST
REGION.  LATER TONIGHT...WSWLY LLJ WILL INTENSIFY OVER THE SRN
PLAINS AND SHIFT EWD ACROSS THE MID SOUTH ASSOCIATED WITH RIGHT
ENTRANCE REGION OF VERY STRONG UPPER JET MAX OVER THE OH RIVER
VALLEY.  LOW LEVEL WAA REGIME ATOP MODIFYING ARCTIC AIR MASS WILL
THEREFORE SUPPORT INCREASED MOIST CONVECTION INTO THE ARKLATEX
REGION...POSSIBLY BY LATER THIS EVENING...WITH ACTIVITY INCREASING
IN COVERAGE ACROSS THE MID SOUTH/TN RIVER VALLEY OVERNIGHT. 
HOWEVER...FORECAST SOUNDINGS ONLY GENERATE A SMALL SLIVER OF
ELEVATED CAPE LATER TONIGHT WITH MUCAPE AOB 100 J/KG. 
THEREFORE...EXPECT NEGLIGIBLE THUNDERSTORM COVERAGE WITH THIS
ACTIVITY THROUGH 12Z.

..EVANS.. 02/21/2006

...NOTICE...
THE STATION RELATIVE POINTS IN THIS PRODUCT WERE
DISCONTINUED ON 14 FEBRUARY 2006 AND ARE NOW AVAILABLE
IN THE FOLLOWING PRODUCTS:

   WMO HEADER:       AWIPS ID:
   WUUS01            PTSDY1
   WUUS02            PTSDY2
   WUUS03            PTSDY3

A SERVICE CHANGE NOTICE ...SCN05-39... PROVIDES DETAILS
ON THIS TRANSITION. FOR ADDITIONAL DETAILS SEE THE FOLLOWING
WEB ADDRESS USING LOWER CASE LETTERS:
WWW.NWS.NOAA.GOV/OM/NOTIF.HTM