FNUS75 KSLC 131627
FWSSLC

SPOT FORECAST FOR AHLSTROM HOLLOW
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1027 AM MDT WED JUL 13 2011

.DISCUSSION...
PRESSURE GRADIENT WILL BE TIGHTENING OVER SOUTHWESTERN UTAH OVER THE
NEXT 24 HOURS AS TROUGH OF LOW PRESSURE DEEPENS ALONG THE WEST COAST.
THIS WILL INCREASE THE SOUTHWESTERLY FLOW WITH WINDS INCREASING EACH
AFTERNOON DUE TO INCREASING MIXING HEIGHTS IN THIS DRIER AIR MASS.
DEEPER MIXING WILL ALSO BRING A BETTER CHANCE FOR WIND GUSTS OVER
25 MPH ON THURSDAY AFTERNOON AS RELATIVE HUMIDITY LEVELS DROP TO
NEAR THE 15 PERCENT MARK. THE DRIER CONDITIONS WITH AFTERNOON
GUSTINESS SHOULD CONTINUE THROUGH LATE WEEK WITH SOME INCREASE
IN MOISTURE INDICATED BY MID WEEKEND AS THE UPPER RIDGE BUILDS
WESTWARD OUT OF THE PLAINS INTO THE GREAT BASIN.

.TODAY...
  LAL.................1.
  HAINES INDEX........4..LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....NEAR 75 F BY 3 PM MDT.
  MIN HUMIDITY........20 TO 25 PERCENT BY 3 PM MDT.
  WINDS - 20-FOOT.....SOUTH WINDS 5 TO 10 MPH THIS MORNING
                      INCREASING TO 15 TO 20 MPH IN THE AFTERNOON
                      WITH A FEW GUSTS AROUND 25 MPH POSSIBLE.

.TONIGHT...
  LAL.................1.
  HAINES INDEX........3 ..VERY LOW.
  SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....46-48.
  MAX HUMIDITY........52-54 PERCENT.
  WINDS - 20-FOOT.....SOUTHWEST WINDS 10 TO 15 MPH THROUGH LATE
                      EVENING...DOWNSLOPE/DOWNVALLEY AFTER MIDNIGHT
                      AT 3 TO 8 MPH.

.OUTLOOK FOR THURSDAY...
  LAL.................1.
  HAINES INDEX........4..LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....AROUND 77 F BY 3 PM MDT.
  MIN HUMIDITY........AROUND 15 PERCENT BY 3 PM MDT.
  WINDS - 20-FOOT.....SOUTH WINDS 10 TO 15 MPH SHIFTING TO THE
                      SOUTHWEST AROUND 20 MPH LATE IN THE AFTERNOON
                      WITH GUSTS OVER 25 MPH POSSIBLE.



FORECASTER...GJT
REQUESTED BY...LYNDSAY FONGER
REASON FOR REQUEST...PRESCRIBED
.TAG 20110713.AHLST.01/SLC

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