FNUS75 KSLC 051534
FWSSLC

SPOT FORECAST FOR AMOS CANYON WFM
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
934 AM MDT WED AUG 5 2009

.DISCUSSION...DEEP SOUTHWESTERLY FLOW REMAINS IN PLACE ACROSS
THE REGION AS THE CLOSED CALIFORNIA LOW REMAINS TO THE WEST...AND
THE PERSISTENT 4-CORNERS HIGH REMAINS TO THE SOUTHEAST. PROGRESSION OF
THE LOW EASTWARD OF THE NEXT 36 HOURS WILL INCREASE WINDS
SIGNIFICANTLY ACROSS THE REGION...HAMPERING TYPICAL DIURNAL
WIND FLUCTUATIONS...OVERNIGHT LOWS...AND RH RECOVERIES AT AMOS.
ANTICIPATE WIND SPEEDS WILL TREND TO INCREASE TODAY...BECOMING GUSTY
DURING PEAK HEATING THIS AFTERNOON. MID LEVEL MOISTURE CONTINUES TO
INCREASE ACROSS THE AREA UPPING THE THREAT FOR FAST MOVING
THUNDERSTORMS WITH LITTLE RAINFALL THROUGH THIS EVENING...BUT
BULK OF THUNDERSTORM THREATS SHOULD BE SHUNTED EAST FOR THURSDAY AS SOUTHWEST
WINDS INCREASE FURTHER AHEAD OF THE STRONG COLD WHICH AT THAT TIME
WILL STILL BE POSITIONED OVER EASTERN NEVADA. GUIDANCE HAS SPED
COLD FRONTAL PASSAGE UP TO AROUND THE MIDDLE OF THE NIGHT THURSDAY
NIGHT AT AMOS...AND IT SHOULD BE A DRY PASSAGE WITH A RAPID SWITCH
TO STRONG DOWNSLOPE ON THE EASTERLY FACING EXPOSURES.

.TODAY...
  LAL.................1 UNTIL NOON...THEN 4.
  HAINES INDEX........5 ..MODERATE.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT CLOUD COVER)
                      UNTIL NOON...THEN MOSTLY CLOUDY (80-90
                      PERCENT CLOUD COVER). SCATTERED FAST MOVING
                      SHOWERS AND THUNDERSTORMS AFTER NOON.
  MAX TEMPERATURE.....80.
  MIN HUMIDITY........17-21 PERCENT.
  WINDS - 20-FOOT.....SOUTHEAST WINDS 5 TO 15 MPH LATE THIS MORNING
                      INCREASING TO 10 TO 18 MPH WITH GUSTS UP TO 25 MPH
                      THIS AFTERNOON.

.TONIGHT...
  LAL.................2 UNTIL MIDNIGHT...THEN 1.
  HAINES INDEX........5 ..MODERATE.
  SKY/WEATHER.........ISOLATED FAST MOVING SHOWERS AND THUNDERSTORMS
                      UNTIL MIDNIGHT.
  MIN TEMPERATURE.....65-69.
  MAX HUMIDITY........30-33 PERCENT.
  WINDS - 20-FOOT.....SOUTHWEST WINDS 10 TO 20 MPH ALONG THE RIDGELINES
                      WITH DOWNSLOPE 5 TO 10 MPH IN THE SHELTERED
                      DRAINAGES.

.OUTLOOK FOR THURSDAY...
  LAL.................1 UNTIL NOON...THEN 2.
  HAINES INDEX........5 ..MODERATE.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT CLOUD COVER). A
                      SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN
                      THE AFTERNOON.
  MAX TEMPERATURE.....76-78.
  MIN HUMIDITY........14-17 PERCENT.
  WINDS - 20-FOOT.....BREEZY. SOUTHWEST WINDS 20 TO 25 MPH. GUSTS
                      UP TO 40 MPH IN THE LATE MORNING AND
                      AFTERNOON. DIRECTIONS SHOULD TREND MORE
                      TO THE SOUTHEAST IN THE DRAINAGES DURING PEAK
                      HEATING...BUT REMAIN SOUTHWESTERLY ALONG THE
                      RIDGES.



FORECASTER...MERRILL
REQUESTED BY...NELS RASMUSSEN
REASON FOR REQUEST...WILDFIRE
.TAG 20090805.AMOSC.01/SLC

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