SWODY1
SPC AC 061233
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0633 AM CST FRI NOV 06 2009
VALID 061300Z - 071200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
COLD MID-UPPER LEVEL S/W TROUGH IS CURRENTLY MOVING EWD INTO THE PAC
NW...WITH PRONOUNCED DRY SLOT EVIDENT IN WV IMAGERY. SCATTERED
LIGHTNING STRIKES HAVE BEEN OBSERVED WITH THIS
DISTURBANCE...OCCURRING CLOSE TO THE WA/ORE COAST DURING THE EARLY
MORNING HOURS AS LOW TO MID LEVEL LAPSE RATES CONTINUE TO STEEPEN.
COMBINATION OF STEEP LAPSE RATES AND FAVORABLY MOIST BOUNDARY LAYER
AIRMASS WILL CONTRIBUTE TOWARD SEVERAL HUNDRED J/KG OF MUCAPE
EXTENDING INTO THE MIXED PHASE REGION /PER 12Z UIL RAOB/. THIS
INSTABILITY ENVIRONMENT IS FORECAST TO PERSIST INTO THE
AFTERNOON...SUGGESTING AN ISOLATED THREAT OF TSTMS WILL CONTINUE
THROUGH THE DAY. FARTHER E...MID LEVEL S/W TROUGH IS FORECAST TO
EVENTUALLY REACH THE NRN ROCKIES BY LATE MORNING/EARLY AFTERNOON.
HERE TOO COLD AIR ALOFT WILL RESULT IN STEEPENING LAPSE RATES WHICH
MAY AID IN THE DEVELOPMENT OF ISOLATED STORMS/LIGHTNING STRIKES.
..CORFIDI/GARNER.. 11/06/2009
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