Sunday, February 23, 2014

DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 230817
SWODY3
SPC AC 230816

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0216 AM CST SUN FEB 23 2014

VALID 251200Z - 261200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
LITTLE CHANGE IS FORECAST TO OCCUR WITH RESPECT TO THE UPPER PATTERN
FOR DAY 3 AS COMPARED TO DAY 2...WITH RIDGING TO PREVAIL ACROSS WRN
NOAM AND CYCLONIC FLOW OVER THE REMAINDER OF THE CONTINENT. AS THE
MAIN VORTEX OVER THE HUDSON BAY REGION DROPS A BIT SWD...AND HEIGHTS
FALL A BIT OVER THE CENTRAL U.S. IN RESPONSE...HIGH PRESSURE/POLAR
SURFACE AIR IS PROGGED TO LIKEWISE SPREAD SEWD ACROSS THE CENTRAL
PORTION OF THE COUNTRY. AS THIS OCCURS...A GRADUAL SUPPRESSION OF
THE MAIN WNW-ESE BAROCLINIC ZONE TOWARD THE RIO GRANDE/GULF OF
MEXICO WILL OCCUR. LATE IN THE PERIOD...THE FRONT SHOULD EXTEND
FROM DEEP S TX EWD ACROSS THE GULF COAST REGION/NRN GULF OF MEXICO.

AS THE FRONT SAGS SWD...AN ANAFRONTAL/ISENTROPIC UPGLIDE SCENARIO
WILL CONTINUE -- SUPPORTING SHOWERS AND THUNDERSTORMS TO THE COOL
SIDE OF THE BOUNDARY. THEREFORE...WILL INTRODUCE A LARGE ZONE OF
10% THUNDER RISK FROM THE SRN PLAINS EWD ACROSS THE GULF COAST
STATES/SOUTHEAST U.S. -- WITH THE NRN FRINGE OF THE RISK SHIFTING
SWD WITH TIME IN CONJUNCTION WITH SWD SURFACE FRONTAL ADVANCE.

..GOSS.. 02/23/2014

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