Tuesday, October 7, 2008

DAY3SVR: Nws Storm Prediction Center Norman Ok

ACUS03 KWNS 070710
SWODY3
SPC AC 070708

DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0208 AM CDT TUE OCT 07 2008

VALID 091200Z - 101200Z

...NO SVR TSTM AREAS FORECAST...

...PORTIONS OF SERN STATES AND FL...

DIFFERENCES PERSIST BETWEEN THE GFS/ECMWF AND THE NAM IN HANDLING
UPPER LOW MOVING THROUGH THE SERN STATES ON THURSDAY. THE NAM IS
CONSIDERABLY SLOWER AND CUTS THE LOW OFF OVER THE NRN GULF WHILE THE
GFS AND ECMWF ARE SOMEWHAT FASTER AND FARTHER NORTH WITH THE SYSTEM
BECOMING CUTOFF OVER GA. WILL LEAN MORE TOWARD THE GFS/ECMWF THIS
PERIOD.

IN EITHER CASE THE UPPER LOW SHOULD CONTINUE TO WEAKEN AND BECOME
MORE EQUIVALENT BAROTROPIC IN NATURE WITH A CORRESPONDING DECREASE
IN LOW-MID LEVEL FLOW AND VERTICAL SHEAR. A FEW STRONG MULTICELL
STORMS WILL BE POSSIBLE ESPECIALLY NEAR THE UPPER LOW CENTER WHERE
TEMPERATURES NEAR -12C AT 500 MB WOULD SUPPORT A THREAT FOR HAIL IF
SUFFICIENT DIABATIC HEATING OCCURS. OTHERWISE ISOLATED STRONG WIND
GUSTS WILL BE POSSIBLE WITH STORMS DEVELOPING OVER FL IN ASSOCIATION
WITH SEA BREEZE BOUNDARIES.

..DIAL.. 10/07/2008

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