SWODY1
SPC AC 080518
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1118 PM CST WED DEC 07 2011
VALID 081200Z - 091200Z
...NO TSTM AREAS FORECAST...
...DISCUSSION...
LARGE SCALE UPPER PATTERN WILL REMAIN DOMINATED BY A TROUGH OVER THE
ERN U.S. WHICH WILL AMPLIFY FURTHER AS ANOTHER IMPULSE DROPS SEWD
INTO THE UPPER MS VALLEY AND GREAT LAKES REGION. RECENT INTRUSIONS
OF CP AIR HAVE CONTRIBUTED TO A LOW THETA-E BOUNDARY LAYER OVER THE
GULF. PROSPECTS FOR THUNDERSTORMS SHOULD REMAIN CONFINED TO LAKE
SUPERIOR AND THE UPPER PENINSULA OF MI WHERE LOW LEVEL TRAJECTORIES
PARALLEL TO THE LONG AXIS OF THE LAKE AND POST FRONTAL COLD AIR
ALOFT WILL ACT TO MAINTAIN A MARGINALLY UNSTABLE SFC-700 MB LAYER.
THOUGH ISOLATED LIGHTNING STRIKES WILL BE POSSIBLE WITHIN SHALLOW
LAKE EFFECT CONVECTION...COVERAGE WILL LIKELY REMAIN BELOW 10%.
..DIAL.. 12/08/2011
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