SWODY1
SPC AC 271244
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0744 AM CDT FRI AUG 27 2010
VALID 271300Z - 281200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
WRN NORTH AMERICAN TROUGH EXPECTED TO AMPLIFY THROUGH SAT AS AN E
PACIFIC JET STREAK MOVES SSE INTO NRN CA...AND UPR LOW PERSISTS OVER
NRN AB/SK IN RESPONSE TO STRONG SHORTWAVE TROUGH MOVING NEWD FROM
SRN AB/NW MT. FARTHER S...AZ UPR LOW IS EMBEDDED WITHIN MUCH WEAKER
FLOW AND SHOULD DRIFT ONLY SLOWLY E.
AT LWR LVLS...COLD FRONT ASSOCIATED WITH AB UPR IMPULSE WILL MOVE E
ACROSS THE NRN PLNS...WHILE TRAILING SWRN PORTION MOVES MORE SLOWLY
SE ACROSS THE CNTRL RCKYS...THE GRT BASIN...AND NRN CA.
IN THE EAST...UPR TROUGH SHOULD EXIT THE MID ATLANTIC STATES LATER
TODAY...WHILE WEAK SFC FRONT REMAINS STALLED FROM SRN PARTS OF THE
GULF CSTL STATES NE INTO CSTL SC.
...SWRN STATES/GRT BASIN...
SUBTROPICAL MOISTURE PLUME NOW EXTENDING FROM THE LWR CO VLY INTO
ERN NV/UT EXPECTED TO SHIFT SLIGHTLY E THROUGH THE PERIOD AS TROUGH
AMPLIFIES ALOFT AND AZ CIRCULATION DRIFTS EWD. WEAK TO MODERATE
INSTABILITY SHOULD DEVELOP IN THE MOIST PLUME FROM SRN CA THROUGH AZ
INTO THE CNTRL GRT BASIN TODAY IN RESPONSE TO SFC HEATING. THE
GREATEST DESTABILIZATION SHOULD OCCUR OVER SRN CA AND SRN AZ...WHERE
THE RICHEST LOW LVL MOISTURE EXISTS IN A BAND EXTENDING NWD FROM THE
GULF OF CA.
STORMS SHOULD ONCE AGAIN FORM ALONG TERRAIN FEATURES AND RESIDUAL
OUTFLOW BOUNDARIES...WITH DEVELOPMENT ALSO MODULATED BY AREAS OF
ASCENT ASSOCIATED WITH AZ UPR CIRCULATION. WEAK VERTICAL SHEAR
SHOULD KEEP ACTIVITY RESTRICTED TO PULSE STORMS AND CLUSTERS OF WEAK
MULTICELLS. HOWEVER...INVERTED-VEE THERMODYNAMIC ENVIRONMENT AND PW
RANGING FROM NEARLY AN INCH IN ERN NV/UT TO 1.75 INCHES IN SRN AZ/SE
CA MAY FOSTER ISOLD DMGG WIND GUSTS...ESPECIALLY EARLY THIS EVE.
..CORFIDI/ROGERS.. 08/27/2010
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