FNUS75 KSLC 212358 CCA
FWSSLC

SPOT FORECAST FOR TWITCHELL CANYON...CORRECTED TO ADD OUTLOOK
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
240 PM MDT SAT AUG 21 2010

.DISCUSSION...FORECAST RESENT TO ADD OUTLOOK FOR 3 TO 5 DAY
PERIOD...ORIGINAL FORECAST FOR TODAY...TONIGHT AND SUNDAY WAS NOT
ALTERED.

WINDY CONDITIONS WILL PERSIST AT THE FIRE
SITE...ESPECIALLY OVER THE RIDGELINE AHEAD OF A SURFACE FRONT
SCHEDULED TO REACH NORTHWEST UTAH LATE SUNDAY. THIS FRONT WILL
SETTLE VERY NEAR THE FIRE SITE SUNDAY EVENING...PRODUCING LIGHTER
BUT ERRATIC WINDS LATE SUNDAY NIGHT THROUGH MONDAY. MOISTURE WILL
SURGE NORTH OF THE FRONT TONIGHT THROUGH SUNDAY. THE THREAT FOR
SHOWERS AND THUNDERSTORMS WILL INCREASE WITH THE MOISTURE...WITH
BEST THREAT FOR WETTING RAIN COMING SUNDAY AFTERNOON.

.REST OF TODAY...
  LAL.................1.
  CWR.................0 PERCENT.
  HAINES INDEX........5 ..MODERATE.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....AT 8000 FT 79-82.
                      AT 10000 FT 72-74.
  MIN HUMIDITY........AT 8000 FEET 19-22 PERCENT.
                      AT 10000 FEET 16-19 PERCENT.
  WINDS - 20-FOOT.....SOUTHWEST WINDS 12 TO 16 MPH...GUST TO 27 MPH.
  WINDS - RIDGETOP....SOUTH SOUTHWEST 17 TO 23 MPH...GUST TO 30 MPH.

.TONIGHT...
  LAL.................1.
  CWR.................0 PERCENT.
  HAINES INDEX........4 ..LOW.
  SKY/WEATHER.........BECOMING PARTLY CLOUDY (40-50 PERCENT CLOUD
                      COVER). A SLIGHT CHANCE OF SHOWERS AFTER 0200.
  MIN TEMPERATURE.....AT 8000 FEET 61-63.
                      AT 10000 FEET 48-51.
  MAX HUMIDITY........AT 8000 FEET 51-53 PERCENT.
                      AT 10000 FEET 47-49 PERCENT.
  WINDS - 20-FOOT.....SOUTH SOUTHWEST WINDS 10 TO 15 MPH.
                      GUSTS TO 22 MPH THROUGH 2200.
  WINDS - RIDGETOP....SOUTH SOUTHWEST 18 TO 25 MPH WITH GUSTS TO 35
                      MPH.

.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
                      UNTIL 0900...THEN A CHANCE OF SHOWERS AND
                      THUNDERSTORMS THROUGH AFTERNOON.
  MAX TEMPERATURE.....AT 8000 FEET 69-71.
                      AT 10000 FEET 62-64.
  MIN HUMIDITY........AT 8000 FEET 31-32 PERCENT.
                      AT 10000 FEET 38-41 PERCENT.
  WINDS - 20-FOOT.....WINDY. SOUTHWEST WINDS 18 TO 22 MPH WITH GUSTS
                      TO NEAR 32 MPH.
  WINDS - RIDGETOP....SOUTH SOUTHWEST WINDS 22 TO 26 MPH WITH GUSTS
                      NEAR 35 MPH.

.OUTLOOK FOR MONDAY...
  LAL.................2.
  CWR.................10 PERCENT.
  SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT CLOUD COVER).
                      A SLIGHT CHANCE OF SHOWERS AND
                      THUNDERSTORMS.
  MAX TEMPERATURE.....AT 8000 FEET 74-80.
                      AT 10000 FEET 65-70.
  MIN HUMIDITY........AT 8000 FEET  21-25 PERCENT.
                      AT 10000 FEET  28-32 PERCENT.
  WINDS - 20-FOOT.....NORTH WINDS 5 TO 10 MPH.
  WINDS - RIDGETOP....NORTH WINDS 5 TO 15 MPH.

.OUTLOOK FOR TUESDAY...
  LAL.................1.
  CWR.................0 PERCENT.
  SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....AT 8000 FEET 74-80.
                      AT 10000 FEET 65-70.
  MIN HUMIDITY........AT 8000 FEET  17-21 PERCENT.
                      AT 10000 FEET 21-28 PERCENT.
  WINDS - 20-FOOT.....NORTH WINDS 5 TO 10 MPH.
  WINDS - RIDGETOP....NORTH WINDS 5 TO 15 MPH.

.OUTLOOK FOR WEDNESDAY...
  LAL.................2.
  CWR.................5 PERCENT.
  SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT CLOUD COVER)
                      WITH A SLIGHT CHANCE OF SHOWERS AND
                      THUNDERSTORMS.
  MAX TEMPERATURE.....AT 8000 FEET 74-80.
                      AT 10000 FEET 65-70.
  MIN HUMIDITY........AT 8000 FEET 20-24 PERCENT.
                      AT 10000 FEET 24-30 PERCENT.
  WINDS - 20-FOOT.....DOWNSLOPE/DOWNVALLEY 2 TO 5 MPH BECOMING
                      UPSLOPE/UPVALLEY 3 TO 6 MPH AFTER 1000.
  WINDS - RIDGETOP....SOUTH TO SOUTHWEST 5 TO 15 MPH.



FORECASTER...CONGER/KRUSE
REQUESTED BY...GSORENSON
REASON FOR REQUEST...WILDFIRE
.TAG 20100821.TWITC.01/SLC

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