SWODY2
SPC AC 110543
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1143 PM CST TUE NOV 10 2009
VALID 121200Z - 131200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
NRN STREAM UPPER TROUGH NOW MOVING SEWD THROUGH THE OH VALLEY WILL
PHASE WITH SHORTWAVE TROUGH OVER THE SERN STATES BEFORE MOVING
THROUGH THE CAROLINAS AND EVENTUALLY OFFSHORE THURSDAY AFTERNOON.
ELSEWHERE...A LARGE TROUGH WILL MOVE INTO THE WRN STATES WITH
SHORTWAVE RIDGING FROM THE SRN PLAINS THROUGH THE OH VALLEY.
...COASTAL NC...
A SURFACE LOW WILL DEVELOP ALONG BOUNDARY OVER THE GULF STREAM
WATERS OFF THE NC COAST IN ASSOCIATION WITH UPPER DIVERGENCE
ACCOMPANYING THE UPPER TROUGH. UNSTABLE WARM SECTOR WILL PROBABLY
REMAIN OFFSHORE GIVEN STRONG GRADIENT BETWEEN NERN U.S. SURFACE
RIDGE AND THE COASTAL LOW WHICH WILL PROMOTE STRONG NLY SURFACE
WINDS OVER ERN NC. HOWEVER...SUFFICIENT MOISTURE COULD ADVECT INTO
COASTAL NC ABOVE STABLE LAYER AND CONTRIBUTE TO MARGINAL ELEVATED
INSTABILITY. A FEW EMBEDDED THUNDERSTORMS WILL BE POSSIBLE WITHIN
ZONE OF STRONG ISENTROPIC LIFT...PRIMARILY ACROSS COASTAL NC THIS
PERIOD.
...ELSEWHERE...
ISOLATED LIGHTNING STRIKES COULD ACCOMPANY CONVECTION DEVELOPING
ALONG DEEP BAROCLINIC ZONE FROM THE NRN ROCKIES THROUGH THE
SIERRA-NEVADAS. HOWEVER..COVERAGE IS EXPECTED TO REMAIN LESS THAN
10% DUE TO WEAK INSTABILITY.
..DIAL.. 11/11/2009
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