SWODY3
SPC AC 090818
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0218 AM CST FRI JAN 09 2009
VALID 111200Z - 121200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
A SERIES OF PACIFIC ORIGIN SHORT WAVE TROUGHS WILL AID IN DEVELOPING
A FULL LATITUDE UPPER TROUGH FROM THE ROCKIES EWD ON SUNDAY...WITH
THIS TROUGH ANCHORED TO A VORTEX BECOMING ESTABLISHED OVER HUDSON
BAY. IN THE LOW LEVELS...A SURFACE FRONT...ASSOCIATED WITH A LEAD
SHORT WAVE TROUGH MOVING OFF THE NRN ATLANTIC COAST EARLY SUNDAY...
SHOULD EXTEND FROM ALONG OR JUST OFF THE MID ATLANTIC COAST SWWD
THROUGH NRN FL AT 12Z SUNDAY.
...FL...
A WARM LAYER AT MID LEVELS IS EXPECTED AHEAD OF THE COLD FRONT
MOVING SWD ACROSS THE FL PENINSULA ON SUNDAY. THIS COMBINED WITH A
LACK OF FORCING ALOFT AND WEAK FRONTAL CONVERGENCE DUE TO VEERED LOW
LEVEL PRE-FRONTAL WINDS SUGGEST TSTM DEVELOPMENT SHOULD BE LIMITED
ALONG THE FRONT. WEAK INSTABILITY WILL PRECLUDE A SEVERE WEATHER
THREAT WITH ANY TSTMS THAT CAN DEVELOP.
..PETERS.. 01/09/2009
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