Monday, December 5, 2011

DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 050529
SWODY1
SPC AC 050528

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1128 PM CST SUN DEC 04 2011

VALID 051200Z - 061200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS AND DISCUSSION...
A BROAD BELT OF SWLY FLOW WILL STRETCH FROM THE SRN PLAINS TO THE
ATLANTIC COAST AS A HIGH AMPLITUDE AND POSITIVELY TILTED UPPER
TROUGH BECOMES COMPRESSED AS AN UPPER RIDGE BUILDS INTO THE NW. AT
THE SURFACE...A COLD FRONT WILL SAG SEWD ACROSS LA...MS...AND AL
DURING THE DAY.

LIFT ALONG AND N OF THE COLD FRONT WILL PERSIST THROUGH THE
PERIOD...WITH WIDESPREAD RAIN AND EMBEDDED THUNDERSTORMS. MOST OF
THE ACTIVITY WILL BE ELEVATED ABOVE THE SURFACE FRONT. FORECAST
SOUNDINGS INDICATE POOR LOW TO MID LEVEL LAPSE RATES...AND WEAK
CAPE. THUS..DESPITE STRONG DEEP LAYER SHEAR...SEVERE WEATHER IS
UNLIKELY.

AHEAD OF THE COLD FRONT ACROSS THE WARM SECTOR...BOUNDARY LAYER
DEWPOINTS WILL RISE INTO THE LOW TO MID 60S F...BUT TEMPERATURES
ALOFT WILL BE RELATIVELY WARM...AND CAPPING WILL EXIST. SO WHILE
CONDITIONALLY...VEERING LOW LEVEL WIND PROFILES AND UPPER HODOGRAPH
LENGTH WOULD SUPPORT SUPERCELLS...CAPPING SHOULD SUPPRESS
DEVELOPMENT.

..JEWELL/GARNER.. 12/05/2011

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