FNUS75 KSLC 270336
FWSSLC

SPOT FORECAST FOR TWITCHELL CANYON
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
936 PM MDT THU AUG 26 2010

.DISCUSSION...MOISTURE SPREADING NORTHWARD WILL ALLOW FOR A
SMALL THREAT FOR SHOWERS AND THUNDERSTORMS OVERNIGHT. OTHERWISE
HIGH PRESSURE CENTERED OVER THE CENTRAL ROCKIES WILL GRADUALLY
SHIFT EAST TONIGHT THROUGH FRIDAY...ALLOWING FOR AN INCREASE IN
SOUTHWESTERLY FLOW FRIDAY THROUGH THE UPCOMING WEEKEND. THIS FLOW
WILL LIKELY MIX TO THE SURFACE FRIDAY AFTERNOON...WITH STRONGER
WINDS EXPECTED SATURDAY AND SUNDAY.

THIS SOUTHWEST FLOW WILL ALSO ALLOW MOISTURE TO QUICKLY INCREASE
ACROSS THE AREA FRIDAY...AND REMAIN IN PLACE THROUGH THE UPCOMING
WEEKEND. THIS WILL ALLOW FOR SHOWERS AND THUNDERSTORMS EACH
AFTERNOON AND EVENING THROUGH SUNDAY. LOCALLY HEAVY RAINFALL WILL
BE POSSIBLE WITH ANY STORMS WHICH DEVELOP.

A COLD FRONT WILL PASS THROUGH THE AREA SUNDAY NIGHT ALLOWING
FOR A COOLING AND DRYING TREND INTO EARLY NEXT WEEK...ALONG WITH
LIGHTER WINDS.

.TONIGHT...
  LAL.................2.
  HAINES INDEX........4 ..LOW.
  SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT CLOUD COVER). A
                      SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
  MIN TEMPERATURE.....8000 FEET....60-63.
                      10000 FEET...57-60.
  MAX HUMIDITY........8000 FEET....43-46 PERCENT.
                      10000 FEET...47-50 PERCENT.
  WINDS - 20-FOOT.....DOWNVALLEY/DOWNSLOPE 4-9 MPH.
  WINDS - RIDGETOP....SOUTH 10-15 MPH.

.FRIDAY...
  LAL.................2 UNTIL NOON...THEN 4.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT CLOUD COVER). A
                      SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
                      UNTIL NOON...THEN A CHANCE OF SHOWERS AND
                      THUNDERSTORMS.
  MAX TEMPERATURE.....8000 FEET....77-80.
                      10000 FEET...73-76.
  MIN HUMIDITY........8000 FEET....27-30 PERCENT.
                      10000 FEET...33-36 PERCENT.
  WINDS - 20-FOOT.....UPSLOPE 4-9 MPH BECOMING SOUTHWEST 10-15 MPH
                      WITH GUSTS TO 25 MPH AFTER 1200.
  WINDS - RIDGETOP....SOUTHWEST 15-20 MPH WITH GUSTS TO 30 MPH.

.OUTLOOK FOR SATURDAY...
  LAL.................3 UNTIL NOON...THEN 4.
  HAINES INDEX........3 ..VERY LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT CLOUD COVER). A
                      CHANCE OF SHOWERS AND THUNDERSTORMS.
  MAX TEMPERATURE.....8000 FEET....73-76.
                      10000 FEET...69-72.
  MIN HUMIDITY........8000 FEET....29-32 PERCENT.
                      10000 FEET...35-38 PERCENT.
  WINDS - 20-FOOT.....WINDY. SOUTH 10-15 MPH BECOMING SOUTHWEST
                      20-30 MPH WITH GUSTS TO AROUND 45 MPH AFTER
                      1200.
  WINDS - RIDGETOP....SOUTHWEST 15-25 MPH INCREASING TO 25-35 MPH
                      WITH GUSTS NEAR 55 MPH AFTER 1200.

.OUTLOOK FOR SUNDAY...
  LAL.................3 UNTIL NOON...THEN 4.
  HAINES INDEX........3 ..VERY LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT CLOUD COVER). A
                      CHANCE OF SHOWERS AND THUNDERSTORMS.
  MAX TEMPERATURE.....8000 FEET....70-73.
                      10000 FEET...64-67.
  MIN HUMIDITY........8000 FEET....25-28 PERCENT.
                      10000 FEET...30-33 PERCENT.
  WINDS - 20-FOOT.....BREEZY. SOUTHWEST 15-25 MPH WITH GUSTS TO
                      AROUND 40 MPH.
  WINDS - RIDGETOP....SOUTHWEST 25-35 MPH WITH GUSTS NEAR 50 MPH.

.OUTLOOK FOR MONDAY...
  LAL.................1.
  HAINES INDEX........3 ..VERY LOW.
  CLEARING INDEX......650.
  SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....8000 FEET....71-74.
                      10000 FEET...65-68.
  MIN HUMIDITY........8000 FEET....17-20 PERCENT.
                      10000 FEET...23-26 PERCENT.
  WINDS - 20-FOOT.....SOUTHWEST 8-15 MPH.
  WINDS - 20-FOOT.....SOUTHWEST 10-20 MPH.



FORECASTER...SEAMAN
REQUESTED BY...JTEEPLES
REASON FOR REQUEST...WILDFIRE
.TAG 20100826.TWITC.01/SLC

$$