SWODY2
SPC AC 030537
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1237 AM CDT MON SEP 03 2007
VALID 041200Z - 051200Z
..NO SVR TSTM AREAS FORECAST...
..NRN GRT BASIN/INTERMOUNTAIN W...
A SEASONAL PATTERN CHANGE WILL BEGIN TO EVOLVE ON TUESDAY AS THE
STRONG UPR LOW...CURRENTLY SEVERAL HUNDRED MILES W OF THE PAC NW
COAST...TRANSLATES INTO THE INTERMOUNTAIN W BY LATE TUESDAY NIGHT.
SUB-TROPICAL MOISTURE RESIDING OVER THE SWRN STATES WILL BE ADVECTED
NWD AHEAD OF THIS SYSTEM...CONTRIBUTING TO A DESTABILIZING
ENVIRONMENT BY TUESDAY EVENING. WHILE THE EARLY PART OF THE DAY MAY
SEE WARM CONVEYER BELT DERIVED CONVECTION MOVING NWD THROUGH THE GRT
BASIN...AREAS JUST S/W OF THIS ZONE WILL LIKELY EXPERIENCE STRONG
HEATING PRIOR TO THE ARRIVAL OF THE STRONGER LARGE SCALE SUPPORT.
AS FRONTOGENESIS STRENGTHENS LATE TUESDAY AFTN/EVE...TSTMS WILL
LIKELY DEVELOP FROM SRN ID SWD INTO CNTRL NV AND RAPIDLY TRANSLATE
ENEWD IN 45-50 KT H5 FLOW. BACKING TROPOSPHERIC WINDS AHEAD OF THE
IMPULSE WILL BE FAVORABLE FOR ISOLD BOWING TYPE STRUCTURES WITH
SVR/DMGG WIND GUSTS. THOUGH THE TSTM THREAT WILL SPREAD ENEWD DURING
TUESDAY NIGHT INTO THE NRN/CNTRL ROCKIES...THE SVR THREAT SHOULD
DIMINISH.
..GRTLKS REGION...
ELEVATED TSTMS SHOULD BE ONGOING AT THE START OF THE PERIOD ACROSS
THE UPR GRTLKS REGION ALONG THE AXIS OF ENHANCED WSWLY LOW-LEVEL
FLOW IMPINGING ON A UPR MIDWEST BAROCLINIC ZONE. THIS ACTIVITY WILL
TRANSLATE ESEWD ACROSS MI DURING THE DAY...ALONG ERN EDGE OF A
BUILDING ELEVATED MIXED LAYER. THE LOW-LEVEL FLOW IS EXPECTED TO
WEAKEN DURING THE MID-DAY HOURS AS ASSOCD MID-LEVEL WAVE ROTATES
INTO THE CANADIAN MARITIMES. CONVECTION SHOULD SUBSEQUENTLY WEAKEN
AND PROSPECTS FOR SFC-BASED STORMS ALONG THE FRONT MINIMAL OWING TO
WEAK MASS CONVERGENCE.
.RACY.. 09/03/2007
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