FNUS75 KSLC 210004
FWSSLC

SPOT FORECAST FOR TWITCHELL CANYON
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
604 PM MDT FRI AUG 20 2010

.DISCUSSION...SOUTHERLY WINDS WILL BE INCREASING NEAR THE WILDFIRE
AHEAD OF A COLD FRONT THROUGH THE WEEKEND. ISOLATED SHOWER AND
THUNDERSTORM ACTIVITY IS POSSIBLE IN THE HIGHER TERRAIN SATURDAY
AFTERNOON AND MORE SO ON SUNDAY AS MOISTURE IS PULLED NORTHWARD
AHEAD OF AN APPROACHING TROUGH. THE ASSOCIATED COLD FRONT WILL
SLIDE ACROSS THE FIRE SITE BETWEEN 2000 AND 2400 MDT SUNDAY
EVENING. A DRY NORTHERLY FLOW WILL PREVAIL MONDAY THROUGH TUESDAY.
MOISTURE THOUGH WILL COME BACK NORTHWARD ACROSS YOUR AREA TUESDAY
NIGHT AND WEDNESDAY.

.TONIGHT...
  LAL.................1.
  CWR.................0.
  HAINES INDEX........4 ..LOW.
  SKY/WEATHER.........CLEAR (0-10 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....54-58 AT 8000 FT AND 55-59 AT 10000 FT.
  MAX HUMIDITY........44-50% AT 8000 FT AND 38-42% AT 10000 FT.
  WINDS - 20-FOOT.....SOUTH WINDS 5 TO 10 MPH.
  WINDS RIDGETOP......SOUTHWEST AT 10 INCREASING TO 15 MPH BY
                      DAYBREAK.

.SATURDAY...
  LAL.................1.
  CWR.................0.
  HAINES INDEX........5 ..MODERATE.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT CLOUD COVER)
                      UNTIL NOON...THEN PARTLY CLOUDY (40-50
                      PERCENT CLOUD COVER).
  MAX TEMPERATURE.....82-84 AT 8000 FT AND 76-80 AT 10000 FT.
  MIN HUMIDITY........19-21% AT 8000 FT AND 26-29% AT 10000 FT.
  WINDS - 20-FOOT.....SOUTH WINDS 10 TO 15 MPH WITH GUSTS TO 25 MPH
                      IN THE AFTERNOON.
  WINDS AT RIDGETOP...SOUTHWEST AT 15-20 MPH WITH GUSTS OF 30 MPH
                      IN THE AFTERNOON.

.OUTLOOK FOR SUNDAY...
  LAL.................2 UNTIL NOON...THEN 4.
  CWR.................20 PERCENT.
  HAINES INDEX........3 ..VERY LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT CLOUD COVER). A
                      SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN
                      THE MORNING...THEN A CHANCE OF SHOWERS AND
                      THUNDERSTORMS IN THE AFTERNOON.
  MAX TEMPERATURE.....74-78 AT 8000 FT AND 66-72 AT 10000 FT.
  MIN HUMIDITY........40-48% AT 8000 FT AND 48-56% AT 10000 FT.
  WINDS - 20-FOOT.....SOUTHWEST WINDS 15 TO 20 MPH WITH GUSTS TO 25
                      MPH IN THE AFTERNOON.
  WINDS AT RIDGETOP...SOUTHWEST AT AROUND 20 MPH WITH GUSTS TO 35 MPH
                      IN THE AFTERNOON.

.OUTLOOK FOR MONDAY...
  LAL.................1.
  CWR.................0 PERCENT.
  HAINES INDEX........3 ..VERY LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (15-30 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....77-81 AT 8000 FT AND 68-72 AT 10000 FT.
  MIN HUMIDITY........21-25% AT 8000 FT AND 24-28% AT 10000 FT.
  WINDS - 20-FOOT.....NORTH WINDS 5 TO 10 MPH WITH GUSTS TO 15 MPH.
  WINDS AT RIDGETOP...NORTH AT 10-15 MPH WITH GUSTS TO 20 MPH
                      IN THE AFTERNOON.

.OUTLOOK FOR TUESDAY...
  LAL.................1.
  CWR.................0 PERCENT.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........PARTLY CLOUDY (25-40 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....78-83 AT 8000 FT AND 70-74 AT 10000 FT.
  MIN HUMIDITY........17-21% AT 8000 FT AND 19-24% AT 10000 FT.
  WINDS - 20-FOOT.....NORTH WINDS 5 TO 10 MPH WITH GUSTS TO 15 MPH.
  WINDS AT RIDGETOP...NORTH AT 10-15 MPH WITH GUSTS TO 20 MPH
                      IN THE AFTERNOON.


FORECASTER...STRUTHWOLF
REQUESTED BY...GSORENSON
REASON FOR REQUEST...WILDFIRE
.TAG 20100820.TWITC.01/SLC

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