SWODY3
SPC AC 220602
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0102 AM CDT THU SEP 22 2011
VALID 241200Z - 251200Z
...SYNOPSIS...
CUT-OFF UPPER LOW CENTERED ACROSS THE GREAT LAKES/MIDWEST IS
FORECAST TO RETROGRADE TOWARD THE MIDDLE MS VALLEY ON SATURDAY. THIS
WILL MAINTAIN A SWATH OF MODEST SSWLY DEEP-LAYER FLOW FROM THE GULF
AND SUB-TROPICS NEWD ALONG THE ERN SEABOARD. MEANWHILE...UPPER RIDGE
WILL WEAKEN ACROSS THE ROCKIES AND ADJACENT HIGH PLAINS AS ANOTHER
DEEP TROUGH EDGES TOWARD THE WEST COAST.
IN ADDITION TO SOME CHANCE FOR SCATTERED LOW-TOPPED SHOWERS AND
PERHAPS A FEW EMBEDDED TSTMS BENEATH/AROUND THE CLOSED LOW...FROM
THE GREAT LAKES TO OH VALLEY...SHOWERS AND STORMS WILL ALSO REMAIN
POSSIBLE WITHIN WEAK TROUGHING AND VERY MOIST AIR MASS ALONG THE ERN
SEABOARD. GIVEN OVERALL LACK OF STRONGER FORCING WITH THE UPPER
SYSTEM BECOMING ESSENTIALLY BAROTROPIC...CHANCES FOR SEVERE STORM
DEVELOPMENT APPEAR LOW.
..CARBIN.. 09/22/2011
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