DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 291725
SWODY2
SPC AC 291723

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1123 AM CST SUN DEC 29 2013

VALID 301200Z - 311200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
A LONG-WAVE UPPER TROUGH IS FORECAST TO REMAIN ESTABLISHED OVER THE
U.S. THIS PERIOD...WITH CYCLONIC FLOW AFFECTING NEARLY THE ENTIRE
COUNTRY. WHILE FROM A SMALLER-SCALE PERSPECTIVE AN EWD SHIFT IN THE
MAIN TROUGH AXIS WILL OCCUR...AS SHORT-WAVE ENERGY RACES EWD FROM
THE HIGH PLAINS TO THE LOWER LAKES/NORTHEAST/MID-ATLANTIC
REGION...THE LARGER-SCALE LONGWAVE TROUGHING WILL BE REINFORCED ON
THE WRN FRINGE AS SHORT-WAVE ENERGY BEGINS TO SPREAD SEWD INTO THE
PAC NW/NRN INTERMOUNTAIN REGION LATE.

AT THE SURFACE...CONTINENTAL POLAR AIR WILL PREVAIL ACROSS MOST OF
THE COUNTRY IN THE WAKE OF A COLD FRONT MOVING EWD ACROSS THE WRN
ATLANTIC AND SWD THROUGH THE GULF OF MEXICO. WHERE THIS FRONT
LINGERS INLAND -- I.E. ACROSS S FL THROUGH THE FIRST HALF OF THE
PERIOD -- ISOLATED DEEP MOIST CONVECTION /INCLUDING PERHAPS A
THUNDERSTORM OR TWO/ WILL BE POSSIBLE. OTHERWISE...THUNDER RISK
ACROSS THE U.S. WILL REMAIN NEGLIGIBLE THROUGH THE PERIOD.

..GOSS.. 12/29/2013

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