SWODY1
SPC AC 251227
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0727 AM CDT FRI SEP 25 2009
VALID 251300Z - 261200Z
...NO SVR TSTM AREAS FORECAST...
...CENTRAL PLAINS...
MORNING WATER VAPOR LOOPS SHOW A RELATIVELY STRONG SHORTWAVE TROUGH
ROTATING AROUND THE WEST SIDE OF AN UPPER LOW OVER NEB/KS/CO. THIS
FEATURE WILL TRACK SOUTHEASTWARD AND ACROSS SOUTHWEST KS THIS
AFTERNOON AND TONIGHT. STRONG DAYTIME HEATING OVER THIS
REGION...ALONG WITH COLD TEMPERATURES ALOFT...WILL YIELD STEEP LAPSE
RATES AND MLCAPE VALUES OF 250-500 J/KG. SCATTERED SHOWERS AND
THUNDERSTORMS WILL FORM ALONG/AHEAD OF THE ASSOCIATED COLD FRONT BY
LATE AFTERNOON. FORECAST SOUNDINGS SHOW AMPLE LOW LEVEL VERTICAL
SHEAR...BUT CAPE AND LOW LEVEL MOISTURE VALUES WILL BE LOW. THIS
SHOULD LIMIT OVERALL CONVECTIVE INTENSITY. NEVERTHELESS...A FEW OF
THE STRONGER STORMS THIS AFTERNOON AND EVENING COULD PRODUCE
HAIL/GUSTY WINDS AND/OR A BRIEF SPIN UP.
...MS/TN VALLEYS...
WIDESPREAD LOW LEVEL MOISTURE IS PRESENT THIS MORNING ACROSS MUCH OF
THE OH/TN AND LOWER MS VALLEYS WITH DEWPOINTS IN THE LOWER 70S.
SOUTHWESTERLY MID LEVEL WINDS ARE FORECAST TO SLOWLY STRENGTHEN
ACROSS THIS AREA DURING THE DAY...PROVIDING SUFFICIENT DEEP LAYER
VERTICAL SHEAR FOR A RISK OF A FEW ORGANIZED/STRONG STORMS. THE
MOST LIKELY THREAT WILL BE GUSTY THUNDERSTORM WINDS.
..HART/GRAMS.. 09/25/2009
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
To unsubscribe from WX-STORM send e-mail to LISTSERV@LISTSERV.ILLINOIS.EDU with
"unsub wx-storm" in the body of your message. For more information write cnovy@cox.net.
No comments:
Post a Comment