FNUS75 KSLC 291708
FWSSLC

SPOT FORECAST FOR WILLOW CREEK
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1108 AM MDT FRI MAY 29 2009

.DISCUSSION...THUNDERSTORM INITIATION WILL BE LITTLE EARLIER OVER THE
BURN SITE TODAY AS BUILDUPS ARE ALREADY FORMING ACROSS THE SPINE
OF THE WASATCH PLATEAU. HIGH PRESSURE CONTINUES TO BREAK
DOWN...AND MOISTURE IS STEADILY INCREASING...THUS ANTICIPATE
AREAL EXTENT OF SHOWERS AND THUNDERSTORMS WILL BECOME SCATTERED
FOR THE MIDDAY AND AFTERNOON HOURS AROUND THE WILDFIRE SITE.
OUTSIDE OF THIS...WINDS ARE STILL EXPECTED TO BE PRIMARILY DRIVEN
BY TERRAIN...WITH NORMAL UPSLOPE/DOWNSLOPE DIURNAL TRENDS OVER
THE NEXT 24 HOURS. THAT SAID...MOVEMENT OF THUNDERSTORM CELLS
THIS AFTERNOON FROM EAST TO WEST MAY BRING BRIEF GUSTY DOWNSLOPE
WINDS TO THE FIRE SITE AS THEY MOVE THROUGH.

THE THREAT FOR SHOWERS/AFTERNOON THUNDERSTORMS WILL CONTINUE THROUGH
THE WEEKEND. COULD SEE ISOLATED SHOWERS LINGERING DURING THE OVERNIGHT
HOURS WHICH WOULD KEEP RH VALUES HIGHER THIS WEEKEND. TEMPERATURES
WILL ALSO TREND SLIGHTLY DOWNWARD OWING TO THE CLOUD COVER AND
PRECIPITATION. WARMER/DRIER CONDITIONS WILL SPREAD ACROSS THE FIRE
SITE BEGINNING TUESDAY.

.TODAY...
  LAL.................2 UNTIL NOON...THEN 4.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......710.
  SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT CLOUD COVER) UNTIL
                      NOON...THEN PARTLY CLOUDY (60-70 PERCENT
                      CLOUD COVER). ISOLATED THUNDERSTORMS THROUGH
                      NOON...BECOMING SCATTERED SHOWERS AND
                      THUNDERSTORMS FOR THE AFTERNOON.
  MAX TEMPERATURE.....69-73.
  MIN HUMIDITY........24-28 PERCENT.
  WINDS - 20-FOOT.....SOUTHEAST DOWNSLOPE WINDS 4 TO 7 MPH...BECOMING
                      UPSLOPE 5-10 MPH  WITH GUSTS TO 16 MPH AFTER NOON.

.TONIGHT...
  LAL.................4 UNTIL 2200...THEN 1.
  HAINES INDEX........4 ..LOW.
  SKY/WEATHER.........PARTLY CLOUDY (60-70 PERCENT CLOUD COVER).
                      SCATTERED SHOWERS AND THUNDERSTORMS UNTIL
                      2200...THEN A SLIGHT CHANCE OF SHOWERS.
  MIN TEMPERATURE.....43-45.
  MAX HUMIDITY........77-79 PERCENT.
  WINDS - 20-FOOT.....UPSLOPE WINDS 5 TO 15 MPH...SHIFTING TO THE
                      SOUTHEAST AND DECREASING TO 3 TO 9 MPH AFTER
                      MIDNIGHT.

.OUTLOOK FOR SATURDAY...
  LAL.................1 UNTIL 1100 AM...THEN 4.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......770.
  SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT CLOUD COVER)
                      THEN BECOMING MOSTLY CLOUDY (65-75 PERCENT
                      CLOUD COVER). A SLIGHT CHANCE OF SHOWERS IN
                      THE MORNING...THEN SCATTERED SHOWERS AND
                      THUNDERSTORMS IN THE AFTERNOON.
  MAX TEMPERATURE.....66-68.
  MIN HUMIDITY........33-35 PERCENT.
  WINDS - 20-FOOT.....SOUTHERLY DOWNSLOPE WINDS 5 MPH BECOMING
                      A LIGHT UPSLOPE 4 TO 9 MPH AROUND NOON WITH
                      A FEW 20 MPH GUSTS FOR THE AFTERNOON HOURS.



FORECASTER...MERRILL
REQUESTED BY...RIFC
REASON FOR REQUEST...WILDFIRE
.TAG 20090529.WILLO.02/SLC

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