FNUS75 KSLC 021805
FWSSLC

SPOT FORECAST FOR TWITCHELL CANYON
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1205 PM MDT THU SEP 2 2010

.DISCUSSION...HIGH PRESSURE WILL BUILD OVER THE AREA TODAY AND
TOMORROW...RESULTING IN DRY AND STABLE CONDITIONS WITH LIGHT
WINDS. AS THE RIDGE SHIFTS EAST SATURDAY...SOUTHWESTERLY FLOW WILL
INCREASE...RESULTING IN INCREASING WINDS AND BETTER MIXING. WINDS
COULD BE STRONG SUNDAY AFTERNOON AHEAD OF AN APPROACHING STORM
SYSTEM AND COLD FRONT. THIS FRONT IS EXPECTED TO MOVE INTO
NORTHERN UTAH SUNDAY NIGHT AND MOVE THROUGH THE FIRE SITE EARLY
MONDAY MORNING. THIS WILL RESULT IN SIGNIFICANTLY COOLER AND MORE
STABLE CONDITIONS. A DRY WESTERLY FLOW IS EXPECTED TO DEVELOP FOR
THE EARLY PART OF NEXT WEEK BEFORE TURNING SOUTHWESTERLY AND
INCREASING AHEAD OF ANOTHER APPROACHING TROUGH BY THE MIDDLE OF
NEXT WEEK.

.TODAY...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......590.
  SKY/WEATHER.........SUNNY (0-5 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....8000 FEET....74-78.
                      10000 FEET...68-72
  MIN HUMIDITY........8000 FEET....15-19 PERCENT.
                      10000 FEET...18-22 PERCENT.
  WINDS - 20-FOOT.....UPSLOPE/UPVALLEY WINDS 3-7 MPH.
  WINDS - RIDGETOP....NORTHWEST WINDS 5-10 MPH.

.TONIGHT...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  SKY/WEATHER.........CLEAR (0-5 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....8000 FEET....45-49.
                      10000 FEET...43-46
  MAX HUMIDITY........8000 FEET....30-34 PERCENT.
                      10000 FEET...33-37 PERCENT.
  WINDS - 20-FOOT.....DOWNSLOPE/DOWNVALLEY WINDS 3-7 MPH.
  WINDS - RIDGETOP....NORTHWEST WINDS 5-10 MPH SHIFTING TO THE SOUTHWEST
                      OVERNIGHT.

.OUTLOOK FOR FRIDAY...
  LAL.................1.
  HAINES INDEX........6 ..HIGH.
  CLEARING INDEX......830.
  SKY/WEATHER.........SUNNY (0-5 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....8000 FEET....78-82.
                      10000 FEET...74-78
  MIN HUMIDITY........8000 FEET....11-15 PERCENT.
                      10000 FEET...14-18 PERCENT.
  WINDS - 20-FOOT.....UPSLOPE/UPVALLEY WINDS 3-7 MPH.
  WINDS - RIDGETOP....SOUTHWEST WINDS 5-10 MPH



FORECASTER...TRAPHAGAN
REQUESTED BY...RICHFIELD DISPATCH
REASON FOR REQUEST...WILDFIRE
.TAG 20100902.TWITC.01/SLC

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