SWODY1
SPC AC 241239
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0639 AM CST TUE FEB 24 2009
VALID 241300Z - 251200Z
...NO TSTM AREAS FORECAST...
...NRN ROCKIES AND ADJACENT HIGH PLAINS...
SEASONABLY STRONG UPPER LEVEL LOW WILL CONTINUE TO EJECT ENEWD
ACROSS THE PAC NW TODAY AND THE NRN ROCKIES TONIGHT. AHEAD OF THIS
IMPULSE...INCREASING MID LEVEL MOISTURE AND LARGE SCALE ASCENT WILL
MAINTAIN PLUME OF MOIST CONVECTION/PRECIPITATION EXTENDING ACROSS
THE NRN ROCKIES AND INTO PORTIONS OF ERN MT/NRN WY TODAY...AND
SPREADING OVER THE NRN PLAINS TONIGHT. LATEST FORECAST SOUNDINGS
SHOW LAPSE RATES WILL STEEPEN...BUT OVERALL INSTABILITY APPEARS TOO
WEAK FOR MORE THAN A SPORADIC LIGHTNING STRIKE WITHIN BROADER PLUME
OF MOIST CONVECTION. REF SPC MESOSCALE DISCUSSION 144 FOR RELATED
FREEZING RAIN POTENTIAL.
..EVANS.. 02/24/2009
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