SWODY3
SPC AC 170722
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0122 AM CST WED FEB 17 2010
VALID 191200Z - 201200Z
...SYNOPSIS AND FORECAST...
THE LARGE-SCALE PATTERN WILL TRANSITION FROM THAT OF
HIGH-AMPLITUDE...BLOCKING OVER NRN PORTIONS OF N AMERICA TO
QUASI-ZONAL...PROGRESSIVE OVER SRN PARTS. A SERIES OF VORTICITY
MAXIMA ARE FORECAST WITHIN PROGRESSIVE AIRSTREAM...THE MOST NOTABLE
OF WHICH BEING SYSTEM DIGGING ESEWD FROM THE FAR ERN PACIFIC INTO
CA.
IN THE LOW LEVELS...COLD FRONTAL SEGMENTS WILL PUSH SWD THROUGH THE
SRN PLAINS WITH ANOTHER PROGRESSING MORE SLOWLY SWD THROUGH THE
GREAT BASIN AND CNTRL ROCKIES. IT IS ALONG THE LATTER WHERE STEEP
LAPSE RATES AND LOW TO MID-TROPOSPHERIC FRONTOGENETICAL FORCING MAY
CONTRIBUTE TO POCKETS OF WEAK CONVECTIVE INSTABILITY AND
ISOLATED...DIURNAL TSTMS. NO SEVERE WEATHER IS EXPECTED.
..MEAD.. 02/17/2010
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