SWODY1
SPC AC 211553
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0953 AM CST MON FEB 21 2011
VALID 211630Z - 221200Z
...NO SVR TSTM AREAS FORECAST...
THE FEW LIGHTNING STRIKES OBSERVED THIS MORNING LOWER OH VALLEY
REFLECT THE AREA OF BEST LIFT VICINITY SURFACE WAVE AND WIND MAX
MOVING EWD ACROSS THIS AREA. A PLUME OF STEEPER MID LEVEL LAPSE
RATES NOTED ON MORNING SOUNDINGS OF KSGF AND KLZK ARE AIDING THE
ELEVATED INSTABILITY WITH MUCAPES UP TO 500 J/KG.
AMOUNT OF INSTABILITY IN SUPPORT OF ADDITIONAL THUNDERSTORM ACTIVITY
EXPECTED TO STEADILY DIMINISH AS THE OH VALLEY WAVE MOVES E AND MID
LEVEL LAPSE RATES WEAKEN FURTHER. BY THIS EVENING EXPECT ANY
THUNDERSTORM CONCERN TO DROP BELOW THE 10 PERCENT COVERAGE
THRESHOLD.
..HALES/STOPPKOTTE.. 02/21/2011
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