SWODY3
SPC AC 170739
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0139 AM CST TUE FEB 17 2009
VALID 191200Z - 201200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
BROAD UPPER TROUGH WILL HAVE BECOME ESTABLISHED OVER THE ERN HALF OF
THE U.S. THURSDAY. SURFACE LOW WILL OCCLUDE OVER THE NERN STATES
WITH COLD FRONT TRAILING SWD ALONG THE ATLANTIC SEABOARD INTO NRN FL
BY THE START OF THIS PERIOD. THE FRONT WILL MOVE SWD THROUGH THE
REMAINDER OF THE PENINSULA DURING THE DAY. AN UPPER RIDGE WILL
PREVAIL OVER THE WRN STATES.
...NRN AND CNTRL FL...
STRONG UNIDIRECTIONAL VERTICAL SHEAR WILL REMAIN IN VICINITY OF THE
FRONT AS IT MOVES THROUGH NRN AND CNTRL FL. BOUNDARY LAYER WINDS AND
DEEP CONVERGENCE WILL WEAKEN WITH TIME AS THE LOW LEVEL JET SHIFTS
NEWD THROUGH THE WRN ATLANTIC. SCATTERED CONVECTION WILL CONTINUE
DEVELOPING ALONG AND JUST AHEAD OF THE FRONT INTO CNTRL FL. A
MARGINAL THREAT OF ISOLATED DAMAGING WIND MAY PERSIST WITH THIS
ACTIVITY. HOWEVER...PRE-FRONTAL CLOUDS AND WEAK MID LEVEL LAPSE
RATES WILL RESULT IN MARGINAL THERMODYNAMIC PROFILES WHICH SHOULD
LIMIT OVERALL SEVERE POTENTIAL.
...ELSEWHERE...
OFFSHORE GULF FLOW AND STABLE CONDITIONS INLAND WILL PRECLUDE
THUNDERSTORM DEVELOPMENT.
..DIAL.. 02/17/2009
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