SWODY1
SPC AC 280551
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1151 PM CST MON DEC 27 2010
VALID 281200Z - 291200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
AS AN UPPER TROUGH AND ASSOCIATED SURFACE CYCLONE CONTINUE TO SLOWLY
SHIFT AWAY FROM THE NORTHEAST CONUS THIS PERIOD...A WEAKER UPPER
TROUGH WILL CROSS THE SWRN CONUS AND BEGIN MOVING INTO THE SRN
PLAINS LATE. ALSO LATE IN THE PERIOD...A FAST-MOVING TROUGH IS
FORECAST TO MOVE SEWD TOWARD -- AND EVENTUALLY INTO -- THE NWRN
CONUS.
WHILE MUCH OF THE U.S. WILL REMAIN COOL/STABLE THUS HINDERING
CONVECTIVE POTENTIAL...SHOWERS AND PERHAPS A FEW THUNDERSTORMS WILL
BE POSSIBLE OVER THE SRN PLAINS REGION AND ACROSS THE COASTAL PAC NW
IN ADVANCE OF THE UPPER SYSTEMS APPROACHING THOSE AREAS.
...E TX AND VICINITY...
LOW-LEVEL WARM/MOIST ADVECTION -- INCREASING DURING THE SECOND HALF
OF THE PERIOD IN CONJUNCTION WITH AN INTENSIFYING LOW-LEVEL JET
AHEAD OF THE APPROACHING UPPER SYSTEM -- SHOULD RESULT IN VERY
MODEST DESTABILIZATION ATOP A MORE STABLE LOW-LEVEL AIRMASS. WHILE
THE DEGREE OF DESTABILIZATION SHOULD PROVE INSUFFICIENT FOR ANY
APPRECIABLE SEVERE THREAT...SHOWERS AND SCATTERED/ELEVATED
THUNDERSTORMS ARE EXPECTED TO DEVELOP DURING THE SECOND HALF OF THE
PERIOD ACROSS E TX AND VICINITY.
...PAC NW COAST...
THE APPROACH OF THE FAST-MOVING UPPER TROUGH LATE IN THE PERIOD --
AND ASSOCIATED COOLING ALOFT -- WILL YIELD MINIMAL DESTABILIZATION
ACROSS THIS REGION. PASSAGE OF AN ASSOCIATED SURFACE COLD FRONT --
AND WLY/NWLY LOW-LEVEL UPSLOPE BEHIND THE FRONT -- SHOULD SUPPORT
SHOWERS AND PERHAPS SOME EMBEDDED LIGHTNING.
..GOSS/GARNER.. 12/28/2010
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
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