SWODY1
SPC AC 041156
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0556 AM CST FRI JAN 04 2008
VALID 041300Z - 051200Z
..NO SVR TSTM AREAS FORECAST...
ZONAL FLOW PATTERN IS PRESENT THIS MORNING ACROSS MOST OF THE UNITED
STATES...WITH SERIES OF UPPER TROUGHS APPROACHING THE WEST COAST.
ONE STRONG FEATURE WILL MOVE INTO ORE AND NORTHERN CA LATER THIS
MORNING RESULTING IN WIDESPREAD HEAVY PRECIPITATION AND STRONG
WINDS. OFFSHORE LIGHTNING NETWORK HAS CONTINUED TO SHOW A CLUSTER
OF THUNDERSTORMS AROUND 40N/129W. THIS ACTIVITY IS ASSOCIATED WITH
STRONG LARGE SCALE ASCENT ALONG PRIMARY FRONTAL BAND. POTENTIAL
WILL EXIST FOR THUNDERSTORMS TO ACCOMPANY FRONTAL BAND INTO PARTS OF
WESTERN ORE AND NORTHERN CA THROUGH THE DAY...AND POSSIBLY AS FAR
SOUTH AS SFO BAY AND THE SACRAMENTO VALLEY BY EVENING. FORECAST
SOUNDINGS SHOW COOLING TEMPERATURES ALOFT...YIELDING SUFFICIENT
INSTABILITY FOR A RISK OF HAIL IN STRONGER CELLS. ALSO...CONVECTIVE
ENHANCEMENT TO ALREADY VERY STRONG GRADIENT WINDS SUGGEST THE
POSSIBILITY OF DAMAGING THUNDERSTORM WINDS THROUGH AT LEAST 00Z.
ELSEWHERE...DRY AND STABLE CONDITIONS ARE EXPECTED TO PRECLUDE
ORGANIZED THUNDERSTORM ACTIVITY TODAY.
.HART.. 01/04/2008
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