DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 200818
SWODY3
SPC AC 200817

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0217 AM CST THU FEB 20 2014

VALID 221200Z - 231200Z

...NO SVR TSTM AREAS FORECAST...

...SYNOPSIS...
A LOW-AMPLITUDE CYCLONIC FLOW FIELD ALOFT WILL PREVAIL ACROSS THE
U.S. DAY 3...WITH COOL/DRY CONTINENTAL AIR PROGGED TO RESIDE AT THE
SURFACE IN THE WAKE OF PRIOR COLD FRONTAL PASSAGE.

THIS FRONT -- ALREADY WELL OFF THE NEW ENGLAND/MID-ATLANTIC COAST
EARLY IN THE PERIOD -- IS PROGGED TO TRAIL WWD ACROSS FL INTO THE
GULF OF MEXICO. WITH TIME...PERSISTENT WLY FLOW ALOFT ACROSS THE
ROCKIES WILL RESULT IN LEE CYCLOGENESIS INVOF THE SRN HIGH PLAINS --
AND THUS SOME NWD RETURN OF THE FRONT INTO THE WRN AND CENTRAL GULF
COASTAL AREAS. WITH LOW-LEVEL MOISTENING/ISENTROPIC LIFT ONGOING
ACROSS THIS AREA...EVENTUAL/ELEVATED CONVECTIVE DEVELOPMENT IS
EXPECTED -- FOCUSED OVER THE LOWER MS VALLEY VICINITY.
THUS...THUNDER RISK THIS PERIOD -- IN ADDITION TO THE FL VICINITY --
SHOULD INCREASE LATE OVER PARTS OF THE S CENTRAL STATES.
APPRECIABLE SEVERE RISK IS NOT EXPECTED IN THESE AREAS.

..GOSS.. 02/20/2014

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