Sunday, January 23, 2011

DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 231220
SWODY1
SPC AC 231219

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0619 AM CST SUN JAN 23 2011

VALID 231300Z - 241200Z

...NO TSTM AREAS FORECAST...

...S TX/TX COASTAL PLAIN...

ELONGATED MIDLEVEL VORTICITY MAXIMUM CURRENTLY EXTENDING FROM THE
CNTRL PLAINS INTO THE SWRN DESERTS WILL CONTINUE SWD...EVENTUALLY
WEAKENING WITH TIME DUE TO AMPLIFICATION OF UPSTREAM SYSTEM DIGGING
SEWD INTO THE N-CNTRL STATES. AT THE SURFACE...COLD FRONT
STRETCHING FROM LOW PRESSURE OVER SWRN MO SWWD INTO SWRN TX WILL
PROGRESS SEWD...REACHING THE COAST LATE TONIGHT INTO MONDAY
MORNING.

SATELLITE DERIVED PW IMAGERY AND BUOY OBSERVATIONS INDICATE THAT A
PARTIALLY MODIFIED AIR MASS IS RETURNING NWD THROUGH THE WRN GULF OF
MEXICO BENEATH A WELL-DEFINED CAP OBSERVED BY 12Z BRO/CRP SOUNDINGS.
THIS CAP WILL SERVE TO INHIBIT DEEP MOIST CONVECTION THROUGH THE
DIURNAL HEATING CYCLE DESPITE THE CONTINUED MOISTENING OF THE
BOUNDARY LAYER. TONIGHT...INTENSIFICATION OF WARM SECTOR LLJ IS
FORECAST OWING TO COUPLING OF THE INERTIAL OSCILLATION WITH THE
RISING BRANCH OF DIRECT THERMAL CIRCULATION ASSOCIATED WITH ENTRANCE
REGION OF UPPER JET STREAK SITUATED OVER THE LOWER MS VALLEY. AS
SUCH...EXPECT CONVECTION TO GRADUALLY INCREASE IN COVERAGE AND DEPTH
WITHIN ZONE OF LOW-LEVEL WAA/MOISTENING WITH ISOLATED TSTMS POSSIBLE
OVER THE SHELF WATERS LATE TONIGHT INTO MONDAY MORNING. ATTM...TSTM
POTENTIAL ALONG THE IMMEDIATE COAST APPEARS TOO MARGINAL TO WARRANT
INCLUSION OF A GENERAL TSTM AREA.

..MEAD.. 01/23/2011

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