SPC AC 091248
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0748 AM CDT FRI APR 09 2010
VALID 091300Z - 101200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
AN UPPER-LEVEL TROUGH FROM THE GREAT LAKES TO THE SOUTHEAST WILL
MOVE NEWD...STRETCHING FROM HUDSON BAY TO NEW ENGLAND BY EARLY SAT.
AN IMPULSE EMBEDDED WITHIN THE SRN PERIPHERY OF THE TROUGH AND
ASSOCIATED SPEED MAX WILL SHIFT QUICKLY NEWD...RESULTING IN
DEEPENING OF A SURFACE CYCLONE ALONG COASTAL NEW ENGLAND THIS
EVENING. TRAILING PORTION OF SURFACE COLD FRONT WILL SINK SWD ACROSS
THE FL PENINSULA TODAY AND OFFSHORE BY 10/00Z.
...SERN FLORIDA...
PRIOR TO FRONTAL PASSAGE THIS AFTERNOON...AT LEAST PARTIAL SUNSHINE
WILL CONTRIBUTE TO MODEST DESTABILIZATION...GIVEN 700-500 MB LAPSE
RATES AROUND 6.5 DEG C/KM PER 12Z TBW/MFL RAOBS. ALTHOUGH MID-LEVEL
FORCED ASCENT SHOULD BE NEAR-NEUTRAL GIVEN RAPID NEWD PROGRESSION OF
GA/SC IMPULSE...EAST COAST SEA BREEZE INTERACTION WITH THE COLD
FRONT SHOULD AID IN ISOLATED TO SCATTERED TSTM DEVELOPMENT DURING
THE EARLY AFTERNOON. DESPITE WEAKENING MID/UPPER-LEVEL FLOW AND WEAK
LOW-LEVEL WINDS...EFFECTIVE SHEAR AROUND 25 KT MAY BE SUFFICIENT FOR
A COUPLE OF MARGINALLY SEVERE HAIL/WIND EVENTS.
..GRAMS/CORFIDI.. 04/09/2010
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 1630Z
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