SWODY2
SPC AC 201723
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1123 AM CST SUN DEC 20 2009
VALID 211200Z - 221200Z
...NO TSTM AREAS FORECAST...
...SYNOPSIS...
AS THE UPPER TROUGH OVER THE ERN U.S. CONTINUES MOVING INTO THE
ATLANTIC RESULTING IN A MORE ZONAL FLOW FIELD E OF THE ROCKIES...AN
UPPER TROUGH WILL DIG/AMPLIFY SEWD INTO THE WRN STATES THIS PERIOD.
AS THIS OCCURS...A COLD FRONT WILL ALSO SHIFT SEWD ACROSS THE
NORTHWEST AND INTO THE GREAT BASIN REGION.
IN THE WAKE OF THE ERN UPPER TROUGH...A COOL/CONTINENTAL AIRMASS
WILL PREVAIL ACROSS THE ERN CONUS...WITH STABLE CONDITIONS
PRECLUDING THUNDER POTENTIAL.
IN THE WEST...SHOWERS AND PERHAPS AN EMBEDDED LIGHTNING STRIKE OR
TWO WILL BE POSSIBLE ACROSS PORTIONS OF THE NORTHWEST/GREAT
BASIN...BUT THUNDER POTENTIAL DOES NOT APPEAR TO WARRANT A 10%
THUNDER LINE.
..GOSS.. 12/20/2009
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