FNUS75 KSLC 172024
FWSSLC

SPOT FORECAST FOR WILEY FIRE
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
224 PM MDT SUN JUN 17 2012

...RED FLAG WARNING FROM 10 AM THIS MORNING TO 10 PM MDT MONDAY...

.DISCUSSION...A BROAD UPPER TROUGH WILL CONTINUE TO SETTLE INTO THE
NORTHERN ROCKIES STATES TODAY THROUGH TOMORROW...WESTERLY FLOW
ALOFT WILL TREND TO INCREASE AS A RESULT. SURFACE GRADIENT IS
MORE SOUTHERLY OWING TO AT TIMES SOUTHERLY DIRECTIONAL TRENDS AT
AT THE WILEY FIRE. SUSPECT WITH ADDITIONAL HEATING OF THE DAY
COUPLED WITH WESTERLY FLOW ALOFT AND ADDED UPSLOPE COMPONENT
DIRECTIONS WILL BECOME MORE WESTERLY WITH INCREASING SPEEDS. DRY
AIRMASS IN PLACE AND ADDITIONAL HEATING OF DAY WILL CONTINUE TO
TREND HUMIDITY DOWN YIELDING CRITICAL FIRE WEATHER AT THE SITE
INTO THE LATE EVENING HOURS AT LEAST. EXPECTING SOME RH RECOVERY
EARLY MONDAY MORNING BUT IT WILL BE MINIMAL AND BRIEF. WINDS TO
DROP OFF IN THE VALLEY OVERNIGHT.

MONDAY MORNING THROUGH THE AFTERNOON LOOKS TO BE A REPEAT OF THIS
AFTERNOONS CONDITIONS WITH GUSTY SOUTHWEST TO WEST WINDS AND
CRITICAL HUMIDITY DEVELOPING BY 0900-1100. A STRONG AND DRY COLD
FRONT WILL PASS THROUGH THE FIRE SITE SWITCHING WINDS TO THE
NORTHWEST BETWEEN 1800-2000 WITH INCREASING SPEED TRENDS INTO THE
MIDDLE OF THE NIGHT. MUCH COOLER TEMPERATURES WILL SPREAD OVER
THE SITE TUESDAY WITH LIGHTER WINDS AND INCREASING HUMIDITY.


.REST OF TODAY...
  LAL.................1.
  HAINES INDEX........5 ..MODERATE.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....95-97.
  MIN HUMIDITY........8-13 PERCENT.
  WINDS - 20-FOOT.....SOUTHWEST TO WEST WINDS 15 TO 20 MPH WITH
                      GUSTS INTO THE LOW 30 MPH RANGE AT TIMES.

.TONIGHT...
  LAL.................1.
  HAINES INDEX........5 ..MODERATE.
  SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....52-54.
  MAX HUMIDITY........34-41 PERCENT.
  WINDS - 20-FOOT.....SOUTHWEST WINDS 15 TO 20 MPH SHIFTING TO
                      THE SOUTHEAST 8 TO 14 MPH AFTER MIDNIGHT
                      DECREASING TO 5 TO 10 MPH LATE.

.OUTLOOK FOR MONDAY...
  LAL.................1.
  HAINES INDEX........5 ..MODERATE.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....92-94.
  MIN HUMIDITY........9-14 PERCENT.
  WINDS - 20-FOOT.....SOUTHEAST WINDS 5 TO 10 MPH SHIFTING TO THE
                      SOUTHWEST EARLY IN THE AFTERNOON...THEN
                      INCREASING TO WEST 15 TO 20 MPH WITH GUSTS
                      IN THE LOW 30 MPH RANGE LATE IN THE
                      AFTERNOON...SWITCHING TO THE NORTHWEST
                      BETWEEN 1800-2000...SPEEDS DECREASE
                      OVERNIGHT

.OUTLOOK FOR TUESDAY..
  LAL.................1.
  HAINES INDEX........3 ..VERY LOW.
  CLEARING INDEX......690.
  SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....73-78.
  MIN HUMIDITY........18-22 PERCENT.
  WINDS - 20-FOOT.....NORTHWEST 6 TO 12 MPH



FORECASTER...MERRILL
REQUESTED BY...ALLISON FAIRBOURNE
REASON FOR REQUEST...WILDFIRE
.TAG 20120617.WILEY.01/SLC

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