FNUS75 KSLC 212245
FWSSLC

SPOT FORECAST FOR SWASEY PILES
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
345 PM MST MON FEB 21 2011

.DISCUSSION...BOTTOM LINE...MIXING TRENDS WILL INCREASE FROM CURRENT
LEVELS OVER THE NEXT 24 TO 48 HOURS. CLEARING INDICES WILL REMAIN
WELL ABOVE 500 DURING THE DAYTIME PERIODS.

FLOW ALOFT TO BECOME MORE SOUTHWESTERLY IN NATURE AS A BROAD
TROUGH SETTLES INTO FAR NORTHERN UTAH OVER THE NEXT 24 HOURS. THE
INCREASED FLOW ALOFT WILL AID IN MIXING TOMORROW...ESPECIALLY DUE
TO WEAK HIGH PRESSURE RETREATING EAST OVERNIGHT TONIGHT. NEAR
SURFACE WINDS WILL PRIMARILY REMAIN DIURNALLY SLOPE DRIVEN...WITH
SLIGHT ENHANCEMENT FROM THE WEST NORTHWEST TONIGHT. SOUTHWESTERLY
FLOW ALOFT WILL REMAIN IN PLACE THROUGH THE WEEK WITHIN A
PROGRESSIVE AND INCREASINGLY MOIST PATTERN. A TROUGH WILL SETTLE
OVER THE STATE NEXT WEEKEND BRINGING AN INCREASED CHANCE OF
SNOW TO THE REGION.

.REST OF TODAY...
  LAL.................1.
  HAINES INDEX........2 ..VERY LOW.
  CLEARING INDEX......630.
  SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....30-32.
  MIN HUMIDITY........36-40 PERCENT.
  WINDS - 20-FOOT.....SOUTHEAST WINDS 5 TO 8 MPH WITH GUSTS
                      TO 13 MPH.

.TONIGHT...
  LAL.................1.
  HAINES INDEX........2 ..VERY LOW.
  SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....15-17.
  MAX HUMIDITY........69-74 PERCENT.
  WINDS - 20-FOOT.....SOUTHEAST WINDS 5 MPH SHIFTING TO THE WEST
                      NORTHWEST EARLY IN THE EVENING...WNW WINDS
                      5 TO 10 MPH WITH INTERMITTENT GUSTS TO 15 MPH
                      THROUGH THE SECOND HALF OF THE NIGHT.

.OUTLOOK FOR TUESDAY...
  LAL.................1.
  HAINES INDEX........2 ..VERY LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........PARTLY CLOUDY (60-70 PERCENT CLOUD COVER)
                      THEN BECOMING MOSTLY CLOUDY (70-80 PERCENT
                      CLOUD COVER).
  MAX TEMPERATURE.....33-37.
  MIN HUMIDITY........40-45 PERCENT.
  WINDS - 20-FOOT.....WEST NORTHWEST WINDS 5 TO 10 MPH BECOMING
                      SOUTHWEST 5 TO 9 MPH IN THE LATE MORNING
                      AND AFTERNOON.



FORECASTER...MERRILL
REQUESTED BY...DIRK ROGERS
REASON FOR REQUEST...PRESCRIBED
.TAG 20110222.SWASE.01/SLC

$$