Wednesday, January 2, 2013

DAY1SVR: Day 1 Convective Outlook

ACUS01 KWNS 021940
SWODY1
SPC AC 021938

DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0138 PM CST WED JAN 02 2013

VALID 022000Z - 031200Z

...NO TSTM AREAS FORECAST...

NO CHANGES TO THE PREVIOUS OUTLOOK. NO THUNDERSTORMS EXPECTED.

..JEWELL.. 01/02/2013

.PREV DISCUSSION... /ISSUED 1012 AM CST WED JAN 02 2013/

...SYNOPSIS...
POSITIVELY-TILTED UPPER TROUGH EXTENDS FROM CNTRL ONTARIO SWWD
ACROSS THE UPPER MS VALLEY AND INTO THE CNTRL/NRN PLAINS. A CLOSED
LOW...CURRENTLY PHASED WITH THE MAIN UPPER TROUGH...EXISTS JUST OFF
THE NRN BAJA PENINSULA. THE UPPER TROUGH WILL SHIFT EWD AS A STRONG
UPPER RIDGE PROGRESSES EWD OVER THE INTERMOUNTAIN WEST...RESULTING
IN AN AMPLIFIED PATTERN OVER THE WRN CONUS BY THE END OF PERIOD.
DEEP SWLY FLOW WILL BE MAINTAINED FROM THE SWRN STATES TO THE
ATLANTIC COAST.

AT THE SURFACE...COOL TEMPERATURES AND MEAGER MOISTURE BENEATH AN
EXPANSIVE AREA OF HIGH PRESSURE COVER MOST OF THE COUNTRY. A FEW
SHOWERS ARE POSSIBLE ACROSS THE TX COASTAL BEND AND SRN LA AS A WEAK
SHORTWAVE TROUGH MOVES NEWD IN THE SWLY FLOW ALOFT. A FEW SHOWERS
ARE ALSO POSSIBLE ALONG A WEAK FRONTAL BOUNDARY ACROSS SE GA AND NRN
FL. HOWEVER...INSTABILITY OVER BOTH AREAS WILL BE LIMITED BY
RELATIVELY WARM TEMPERATURES ALOFT AND NO TSTMS ARE EXPECTED.

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