FNUS75 KSLC 241443
FWSSLC

SPOT FORECAST FOR TWITCHELL CANYON
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
843 AM MDT SAT JUL 24 2010

.DISCUSSION...A RIDGE OF HIGH PRESSURE WILL REMAIN CENTERED
JUST SOUTH OF THE AREA TODAY BEFORE MOVING OVERHEAD ON
SUNDAY. LIGHT NORTH WINDS ASSOCIATED WITH THIS RIDGE MAY BE
REALIZED ALONG THE UPPER RIDGELINES...OTHERWISE WINDS AT THE
SITE SHOULD REMAIN DOMINATED BY SLOPE FLOWS. THIS RIDGE AXIS
WILL ALSO KEEP MOISTURE ACROSS SOUTHERN UTAH AND ARIZONA
SUPPRESSED SOUTH OF THE AREA TODAY...AND ALTHOUGH THIS
MOISTURE MAY CREEP A BIT NORTHWARD ON SUNDAY ONLY A FEW
AFTERNOON BUILDUPS ARE EXPECTED.

THIS RIDGE IS EXPECTED TO MOVE EAST OF THE AREA MONDAY
ALLOWING MOISTURE TO SURGE NORTHWARD INTO THE AREA FOR MUCH
OF THE UPCOMING WEEK...RESULTING IN A GOOD CHANCE FOR
THUNDERSTORMS EACH DAY. INITIALLY THESE STORMS MAY REMAIN DRY
MONDAY...HOWEVER STORMS SHOULD QUICKLY TRANSITION TO WET BY
TUESDAY AS MOISTURE INCREASES.

.TODAY...
LAL...................1.
HAINES INDEX..........6 ..HIGH.
CLEARING INDEX........1000+.
SKY/WEATHER...........MOSTLY SUNNY (15-25 PERCENT CLOUD COVER).
MAX TEMPERATURE.......79-82.
MIN HUMIDITY..........16-19 PERCENT.
WIND (20 FT)..........SOUTHWEST/UPSLOPE 4-9 MPH. RIDGELINE
                      WINDS NORTH 5-10 MPH.

.TONIGHT...
LAL...................1.
HAINES INDEX..........6 ..HIGH.
SKY/WEATHER...........MOSTLY CLEAR (10-20 PERCENT CLOUD COVER).
MIN TEMPERATURE.......52-55.
MAX HUMIDITY..........54-57 PERCENT.
WIND (20 FT)..........NORTHEAST/DOWNSLOPE 4-9 MPH.

.OUTLOOK FOR SUNDAY...
LAL...................1 UNTIL NOON...THEN 2.
HAINES INDEX..........6 ..HIGH.
CLEARING INDEX........650.
SKY/WEATHER...........MOSTLY SUNNY (10-20 PERCENT CLOUD COVER)
                      UNTIL 1200...THEN PARTLY CLOUDY (40-50
                      PERCENT CLOUD COVER) WITH A FEW AFTERNOON
                      BUILDUPS.
MAX TEMPERATURE.......80-83.
MIN HUMIDITY..........19-22 PERCENT.
WIND (20 FT)..........SOUTHWEST/UPSLOPE 4-9 MPH. RIDGELINE
                      WINDS NORTH 5-10 MPH.



FORECASTER...SEAMAN
REQUESTED BY...GLEN CHAPPELL
REASON FOR REQUEST...WILDFIRE
.TAG 20100724.TWITC.01/SLC

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