SWODY1
SPC AC 170530
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1130 PM CST TUE FEB 16 2010
VALID 171200Z - 181200Z
...NO TSTM AREAS FORECAST...
...SYNOPSIS...
IN THE WEST...STEEP LAPSE RATES/COLD MID LEVEL TEMPERATURES WILL
SPREAD SWD THROUGH THE NRN ROCKIES ACCOMPANYING A SHORTWAVE TROUGH
DIGGING SWD THROUGH THIS REGION. HOWEVER...INSTABILITY IS EXPECTED
TO REMAIN TOO LIMITED FOR AN APPRECIABLE TSTM THREAT.
FARTHER EAST...A CLOSED MID-UPPER LEVEL LOW WILL SHIFT NEWD TOWARD
THE CANADIAN MARITIMES TODAY WHILE AN ATTENDANT LONGWAVE TROUGH...
CURRENTLY EXTENDING SWWD TO THE SRN PLAINS/LOWER MS VALLEY PER
SATELLITE IMAGERY...MOVES EWD TO OFF THE EAST COAST BY 12Z THURSDAY.
OFFSHORE FLOW ALONG THE GULF COAST EMANATING FROM CP HIGH PRESSURE
WILL RESULT IN STABLE CONDITIONS OVER THE ERN TWO THIRDS OF THE
COUNTRY PREVENTING DEEP MOIST CONVECTION.
..PETERS.. 02/17/2010
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