DAY2SVR: Nws Storm Prediction Center Norman Ok

ACUS02 KWNS 250659
SWODY2
SPC AC 250657

DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1257 AM CST TUE FEB 25 2014

VALID 261200Z - 271200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
THE LARGE-SCALE UPPER PATTERN IS PROGGED TO REMAIN GENERALLY
UNCHANGED DAY 2...WITH A RIDGE REMAINING OVER WRN PORTIONS OF NOAM
WHILE A PERSISTENT DOWNSTREAM TROUGH PREVAILS E OF THE ROCKIES. AT
SMALLER SCALES...A SHORT-WAVE TROUGH CROSSING THE ERN PACIFIC IS
FORECAST TO MOVE INLAND ACROSS THE OREGON/NRN CA VICINITY DURING THE
SECOND HALF OF THE PERIOD...WEAKENING WITH TIME AS IT IMPINGES ON
THE BACKGROUND LARGER-SCALE RIDGING.

AT THE SURFACE...A COLD FRONT -- INITIALLY EXTENDING FROM FAR SRN
SC/SRN GA WSWWD ACROSS THE NRN GULF OF MEXICO AND INTO DEEP S TX --
WILL BE DRIVEN STEADILY SWD BY A SURGE OF POLAR AIR SPREADING SEWD
OUT OF CENTRAL CANADA. BY THE END OF THE PERIOD...COLD AIR IS
EXPECTED TO RESIDE ACROSS MUCH OF THE GULF...WITH THE FRONT
LINGERING ONLY ACROSS S FL BY 27/12Z.

A ZONE OF ELEVATED SHOWERS ACROSS PORTIONS OF THE S CENTRAL AND SERN
U.S. WITHIN THE ONGOING/ANAFRONTAL REGIME WILL SHIFT SWD WITH TIME
IN CONJUNCTION WITH FRONTAL ADVANCE. SOME EMBEDDED LIGHTNING WILL
BE POSSIBLE ACROSS S TX EARLY IN THE PERIOD...AND A STRIKE OR TWO
MAY ALSO OCCUR WITHIN ISOLATED PRE-FRONTAL CONVECTION ACROSS FL.
OTHERWISE...LIGHTNING IS NOT EXPECTED E OF THE ROCKIES.

IN THE WEST...CONVECTION WILL MOVE ONSHORE ACROSS THE CA
VICINITY...IN ASSOCIATION WITH THE WEAKENING UPPER SYSTEM MOVING
INLAND ACROSS THIS AREA. OCCASIONAL/EMBEDDED LIGHTNING STRIKES MAY
OCCUR -- PARTICULARLY OVER THE HIGHER TERRAIN OF THE COAST RANGES
AND INLAND OVER THE SIERRA THROUGH MUCH OF THE PERIOD.

..GOSS.. 02/25/2014

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