SWODY1
SPC AC 180434
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1134 PM CDT SAT OCT 17 2009
VALID 181200Z - 191200Z
...NO SVR TSTM AREAS FORECAST...
...PORTIONS OF THE NRN/CNTRL INTERMOUNTAIN WEST...
COMPACT SHORT WAVE TROUGH CURRENTLY OVER WA/SRN BRITISH COLUMBIA
WILL TRANSLATE EWD...WHILE A BROADER UPSTREAM TROUGH AMPLIFIES
TOWARD THE PACIFIC NW/NRN CA COAST THROUGH EARLY MON. COLD FRONT
ASSOCIATED WITH THE INITIAL SHORT WAVE TROUGH WILL SETTLE FROM THE
NRN ROCKIES SWWD TO THE SIERRAS BY SUN AFTERNOON. LIMITED BUOYANCY
SHOULD LARGELY PRECLUDE TSTM DEVELOPMENT THROUGH MUCH OF THE DAY.
HOWEVER...INCREASING MID-LEVEL HEIGHT FALLS DOWNSTREAM OF THE
AMPLIFYING PACIFIC TROUGH INVOF QUASI-STATIONARY FRONTAL
ZONE...SHOULD AID IN THE DEVELOPMENT OF SUFFICIENT ELEVATED
INSTABILITY FOR ISOLATED TSTMS SUN EVENING/NIGHT.
...SERN AZ/SWRN NM...
WEAK SLY LOW-LEVEL FLOW WILL GRADUALLY ADVECT RICHER MOISTURE FROM
SONORA NWD. DESPITE RELATIVELY WARM MID/UPPER-LEVEL TEMPERATURES
LIMITING POTENTIAL FOR CHARGE SEPARATION...A FEW TSTMS SHOULD
DEVELOP OVER HIGHER TERRAIN AT PEAK HEATING.
..GRAMS/DARROW.. 10/18/2009
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