SWODY1
SPC AC 111256
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0656 AM CST SUN NOV 11 2007
VALID 111300Z - 121200Z
..NO SVR TSTM AREAS FORECAST...
..SYNOPSIS...
A COMPLEX FLOW REGIME WITH MULTIPLE STREAMS WILL PERSIST THROUGH THE
PERIOD OVER THE CONUS. AN INITIAL NRN STREAM TROUGH OVER SRN
SASKATCHEWAN WILL PROGRESS ENEWD TO WRN ONTARIO...WHILE A SURFACE
RIDGE DEVELOPING IN THE WAKE OF THIS SYSTEM OVER THE NRN
ROCKIES/PLAINS WILL DRIVE A SURFACE COLD FRONT SEWD ACROSS THE UPPER
MS VALLEY AND CENTRAL PLAINS. IN ADVANCE OF THIS FRONT...A FETCH OF
56-64F BOUNDARY LAYER DEWPOINTS WILL CONTINUE FROM THE NWRN GULF OF
MEXICO TO IA. THE MOISTURE FEED EXTENDS ENEWD OVER IL/INDIANA ABOVE
THE GROUND...WHERE LOW-LEVEL WAA ON THE NOSE OF A 40 KT LLJ IS
SUPPORTING CLUSTERS OF ELEVATED THUNDERSTORMS. ELEVATED CONVECTION
WILL SPREAD EWD ACROSS OH...AND MAY PERSIST THROUGH THE DAY NEAR AND
N OF THE MS/OH RIVER CONFLUENCE.
FARTHER SW...A SEPARATE SRN STREAM EXISTS FROM CA INTO NW MEXICO. A
LEAD SHORTWAVE TROUGH OVER EXTREME NW MEXICO THIS MORNING WILL EJECT
EWD TODAY THEN ENEWD TONIGHT TO W TX...AS AN UPSTREAM WAVE DIGS SEWD
OVER CA AND THE ADJACENT COASTAL WATERS. MOISTENING PROFILES AND
WEAK ASCENT DOWNSTREAM FROM THE LEAD SHORTWAVE TROUGH COULD SUPPORT
ISOLATED THUNDERSTORM DEVELOPMENT LATE TONIGHT INVOF NW TX.
CONVECTION MAY ALSO DEVELOP NEWD ACROSS OK/MO LATE IN THE PERIOD
ALONG THE COLD FRONT MOVING SEWD FROM CENTRAL PLAINS.
.THOMPSON/LEVIT.. 11/11/2007
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