SWODY1
SPC AC 030053
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0753 PM CDT SAT APR 02 2011
VALID 030100Z - 031200Z
...NO SVR TSTM AREAS FORECAST...
AN UPPER-LEVEL TROUGH CURRENTLY OVER THE PACIFIC NORTHWEST WILL MOVE
ESEWD INTO THE INTERMOUNTAIN WEST TONIGHT. ISOLATED THUNDERSTORM
DEVELOPMENT WILL BE POSSIBLE BENEATH A POCKET OF COLD AIR ALOFT IN
ERN WA...NRN ID AND NW MT EARLY THIS EVENING. ISOLATED THUNDERSTORM
DEVELOPMENT MAY ALSO OCCUR THIS EVENING THROUGH TONIGHT IN NRN UT
JUST AHEAD OF THE TROUGH AXIS WHERE LARGE-SCALE ASCENT WILL BE QUITE
STRONG. ISOLATED THUNDERSTORMS MAY ALSO OCCUR IN SE MT AND SW ND
WHERE SOME INSTABILITY EXISTS ON THE NRN EDGE OF A PLUME OF STEEP
MID-LEVEL LAPSE RATES.
FURTHER TO THE EAST...ISOLATED THUNDERSTORMS SHOULD INITIATE LATE
TONIGHT ACROSS THE UPPER MS VALLEY ALONG THE AXIS OF A 60 TO 75 KT
LOW-LEVEL JET. A FEW THUNDERSTORMS MAY ALSO BE PRESENT IN THE CNTRL
APPALACHIAN MTNS THIS EVENING BUT THE CONVECTION SHOULD DIMINISH
QUICKLY OVER THE NEXT FEW HOURS WITH THE LOSS OF SFC HEATING. NONE
OF THE THUNDERSTORM ACTIVITY ACROSS THE CONUS IS EXPECTED TO BE
SEVERE THROUGH TONIGHT.
..BROYLES.. 04/03/2011
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