SWODY1
SPC AC 140539
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1139 PM CST FRI NOV 13 2009
VALID 141200Z - 151200Z
...NO SVR TSTM AREAS FORECAST...
...SYNOPSIS...
UPR-LVL SHORTWAVE TROUGH CURRENTLY DIGGING THROUGH THE INTERMOUNTAIN
W IS EXPECTED TO DIG THROUGH THE GRT BASIN SATURDAY AFTN AND INTO
THE FOUR CORNERS REGION SATURDAY NIGHT. THIS WILL FORCE THE NRN
STREAM WAVE OVER THE DKTS NEWD INTO ONTARIO ALONG NRN PERIPHERY OF A
BUILDING UPR RIDGE ALONG THE ERN SEABOARD.
IN THE LWR LVLS...CDFNT ASSOCD WITH THE NRN STREAM WAVE AND THE WRN
STATES TROUGH WILL TRANSLATE EWD THROUGH THE UPR GRTLKS AND SWD
THROUGH THE CNTRL/SRN PLNS. WRN EXTENT OF THIS FRONT WILL STALL
BRIEFLY SATURDAY AFTN/EVE AS CYCLOGENESIS EVOLVES OVER THE SRN
PLATEAU...BUT THEN RESUME SEWD TRANSLATION ACROSS THE DESERT SW
SATURDAY NIGHT AS THE LOW MOVES INTO THE LOWER PLNS.
...FOUR CORNERS REGION EWD TO THE SRN HIGH PLNS...
STRONG POSITIVE-VORTICITY TROUGH WILL BEGIN TO TURN EWD ACROSS UT/AZ
SATURDAY AFTN...THEN ACROSS THE FOUR CORNERS AREA DURING THE
EVENING. VIGOROUS LARGE SCALE ASCENT WILL CONTRIBUTE TO RAPIDLY
MOISTENING PROFILES AND GIVEN PRESENCE OF STEEP LAPSE RATES...A FEW
TSTMS WILL BE LIKELY FROM PARTS OF SRN UT/NRN AZ EWD INTO SWRN CO
AND NWRN NM. ACTIVITY WILL LIKELY DEVELOP ENE TOWARD THE SRN HIGH
PLNS SATURDAY NIGHT. NO SVR TSTMS ARE EXPECTED AS THERMAL BUOYANCY
WILL REMAIN RELATIVELY WEAK.
..RACY/JEWELL.. 11/14/2009
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