FNUS75 KSLC 251256
FWSSLC

SPOT FORECAST FOR HENRIE KNOLLS
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
656 AM MDT TUE OCT 25 2011

.DISCUSSION...A COLD FRONT STALLED ACROSS CENTRAL UTAH THIS
MORNING WILL MOVE SOUTH THROUGH THE AREA THIS EVENING...MOST
LIKELY BETWEEN 2000 AND 2200. AHEAD OF THIS FRONT A RELATIVELY
MILD SOUTHWESTERLY FLOW WILL KEEP CLEARING INDICES WELL ABOVE
500 THROUGH THIS AFTERNOON WITH WINDS BECOMING BREEZY. A FEW
SHOWERS AND THUNDERSTORMS WILL ALSO BE POSSIBLE AHEAD OF THIS
FRONT THIS AFTERNOON.

MUCH COLDER AIR WILL SPREAD INTO THE AREA BEHIND THE FRONT LATE
THIS EVENING THROUGH TONIGHT. RAIN IS EXPECTED TO CHANGE OVER TO
SNOW BY MIDNIGHT...HOWEVER ANY ACCUMULATION SHOULD REMAIN CONFINED
TO AN INCH OR TWO.

NORTHERLY WINDS WEDNESDAY SHOULD BE SUFFICIENT TO PUSH CLEARING
INDICES ABOVE 500 DESPITE LIMITED MIXING. HIGH PRESSURE WILL
FOLLOW FOR THE REMAINDER OF THE WEEK...RESULTING IN STABLE CONDITIONS
WITH VERY POOR VENTILATION...AND CLEARING INDICES LIKELY IN THE
100-200 RANGE THURSDAY AND FRIDAY.

.TODAY...
  LAL.................1 UNTIL NOON...THEN 3.
  HAINES INDEX........3 ..VERY LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT CLOUD COVER)
                      UNTIL NOON...THEN MOSTLY CLOUDY (70-80
                      PERCENT CLOUD COVER). SCATTERED SHOWERS.
                      WIDELY SCATTERED THUNDERSTORMS AFTER NOON.
  MAX TEMPERATURE.....52-55.
  MIN HUMIDITY........44-46 PERCENT.
  WINDS - 20-FOOT.....SOUTHWEST WINDS 10 TO 15 MPH INCREASING TO 20
                      MPH LATE IN THE AFTERNOON.

.TONIGHT...
  LAL.................1.
  HAINES INDEX........2 ..VERY LOW.
  SKY/WEATHER.........MOSTLY CLOUDY (85-95 PERCENT CLOUD COVER). A
                      CHANCE OF RAIN UNTIL MIDNIGHT...THEN A CHANCE
                      OF SNOW.
  MIN TEMPERATURE.....25-27.
  MAX HUMIDITY........78-80 PERCENT.
  WINDS - 20-FOOT.....WEST WINDS 15 MPH SHIFTING TO THE NORTHWEST 5
                      TO 10 MPH IN THE LATE EVENING AND OVERNIGHT.

.OUTLOOK FOR WEDNESDAY...
  LAL.................1.
  HAINES INDEX........2 ..VERY LOW.
  CLEARING INDEX......550.
  SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT CLOUD COVER)
                      THEN BECOMING PARTLY CLOUDY (40-50 PERCENT
                      CLOUD COVER). A CHANCE OF SNOW SHOWERS IN THE
                      MORNING...THEN A SLIGHT CHANCE OF SNOW
                      SHOWERS IN THE AFTERNOON.
  MAX TEMPERATURE.....40.
  MIN HUMIDITY........36-38 PERCENT.
  WINDS - 20-FOOT.....NORTH WINDS 10 TO 15 MPH.



FORECASTER...SEAMAN
REQUESTED BY...ERIC EASTEP
REASON FOR REQUEST...PRESCRIBED
.TAG 20111025.HENRI.01/SLC

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