Saturday, April 14, 2007

Possible watch coming for North Alabama


MESOSCALE DISCUSSION 0490
NWS STORM PREDICTION CENTER NORMAN OK
1224 PM CDT SAT APR 14 2007

AREAS AFFECTED...NRN AL...NWRN GA...SERN TN

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 141724Z - 141830Z

LOW LEVEL WARM ADVECTION APPEARS TO BE THE
DOMINANT CONTRIBUTOR IN NEWD EXPANSION OF
ELEVATED CONVECTION NORTH OF RETREATING WARM
FRONT. LATEST SFC DIAGNOSTIC DATA SUGGESTS
WARM FRONT IS NOW NEAR THE NRN EDGE OF WW141
AS SFC DEW POINTS ARE RISING ABOVE 60F THROUGH
CNTRL AL. STRONG VERTICAL SHEAR AND INCREASING
INSTABILITY JUST ABOVE THE BOUNDARY LAYER MAY
ULTIMATELY PROVE SUFFICIENT IN SUSTAINING
ORGANIZED SEVERE THUNDERSTORMS ACROSS NRN
AL...POSSIBLY SPREADING INTO SERN TN/NWRN GA.
NEAR-SFC BASED SUPERCELLS ALONGRETREATING
WARM FRONT CERTAINLY BEAR WATCHING AS TORNADO
POTENTIALIS INCREASING ALONG THIS CORRIDOR.

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