FNUS75 KSLC 252312
FWSSLC

SPOT FORECAST FOR HENRIE KNOLLS
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
512 PM MDT SUN OCT 25 2009

.DISCUSSION...STRONG HIGH PRESSURE WILL BE OVER THE REGION TONIGHT
THROUGH MONDAY. THE SUBSIDENCE INVERSION FROM THIS HIGH PRESSURE
SYSTEM WILL BE STRONG THROUGH THE DAY MONDAY WITH IT GRADUALLY
LIFTING FROM NEAR 8600 FEET AT NOON MONDAY AND RISING TO 12000
FEET BY 1800 HRS. TRANSPORT WINDS BELOW THIS INVERSION WILL BE
LESS THAN 10 KTS. THE WINDS ALOFT INCREASE LATE MONDAY NIGHT
THROUGH EARLY TUESDAY AFTERNOON AHEAD OF THE COLD FRONT. WINDS IN
THE FREE ATMOSPHERE WILL REACH ABOUT 35 KTS FROM THE SOUTHWEST.
EXCELLENT MIXING EXPECTED TUESDAY. THE TIMING OF THE COLD FRONT
THROUGH THE BURN SITE IS BETWEEN 1300 AND 1500. PRECIPITATION WILL
START AS RAIN BUT QUICKLY CHANGE TO SNOW WITHIN AN HOUR OF THE
FRONTAL PASSAGE. ACCUMULATIONS OF UP TO 2 INCHES ARE POSSIBLE
TUESDAY AFTERNOON WITH AN ADDITIONAL 3 TO 7 INCHES POSSIBLE
TUESDAY NIGHT THROUGH WEDNESDAY.

.TONIGHT...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....27-29.
  MAX HUMIDITY........29-31 PERCENT.
  WINDS - 20-FOOT.....NORTH WINDS 15 MPH BECOMING NORTHWEST 5 MPH
                      IN THE LATE EVENING AND OVERNIGHT.

.MONDAY...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......590.
  SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT CLOUD COVER)
                      UNTIL NOON...THEN PARTLY CLOUDY (30-40
                      PERCENT CLOUD COVER).
  MAX TEMPERATURE.....55-57.
  MIN HUMIDITY........11-13 PERCENT.
  WINDS - 20-FOOT.....WEST WINDS 5 MPH SHIFTING TO THE NORTHEAST
                      EARLY IN THE AFTERNOON...THEN SHIFTING TO THE
                      SOUTHWEST LATE IN THE AFTERNOON.

.OUTLOOK FOR TUESDAY...
  LAL.................1.
  HAINES INDEX........3 ..VERY LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........BECOMING MOSTLY CLOUDY (85-95 PERCENT CLOUD COVER).
                      SNOW IN DEVELOPING BETWEEN 1300 AND 1500 HRS IN
                      THE AFTERNOON. ACCUMULATIONS UP TO 2 INCHES.
  MAX TEMPERATURE.....42-44.
  MIN HUMIDITY........18-22 PERCENT.
  WINDS - 20-FOOT.....WINDY. SOUTHWEST WINDS 15 TO 20 MPH
                      INCREASING TO WEST 30 MPH IN THE AFTERNOON JUST
                      PRIOR TO THE COLD FRONT. THEN WILL SHIFT TO NORTH
                      NORTHWEST BEHIND THE COLD FRONT AT 15-25 MPH.



FORECASTER...STRUTHWOLF
REQUESTED BY...GOETZINGER
REASON FOR REQUEST...PRESCRIBED
.TAG 20091025.HENRI.01/SLC

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