FNUS75 KSLC 190646
FWSSLC

SPOT FORECAST FOR PATTERSON FIRE
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1246 AM MDT TUE JUL 19 2011

...RED FLAG WARNING IN EFFECT FROM 6 PM UNTIL MIDNIGHT TODAY FOR A STRONG
WIND SHIFT...

.DISCUSSION...MONSOONAL MOISTURE REMAINS OVER THE FIRE SITE
TONIGHT...AND WILL REMAIN IN PLACE THROUGH THE MORNING.
HOWEVER...A TROUGH GRAZING NORTHERN UTAH WILL ALLOW FOR A DRIER
WESTERLY FLOW TO MOVE IN BEGINNING TOMORROW EVENING...AND
PERSISTING THROUGH MUCH OF THE WEEK. AHEAD OF THE TROUGH...WINDS
WILL AGAIN BECOME GUSTY TOMORROW AFTERNOON AND EVENING
OUT OF THE SOUTHWEST. WINDS WILL SHIFT TO THE WEST OR NORTHWEST
DURING THE EARLY EVENING...LIKELY BETWEEN 8 PM AND 10 PM...AND
WILL BE QUITE GUSTY OUT OF THAT DIRECTION BEFORE WEAKENING
OVERNIGHT. THIS WIND SHIFT WILL RESULT IN HIGH FIRE DANGER AT THE
SITE DURING THE EVENING HOURS. DRY CONDITIONS WITH MORE MODERATE
TRANSPORT WINDS WILL DEVELOP FOR WEDNESDAY.


.REST OF TONIGHT...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....64-66.
  MAX HUMIDITY........44-46 PERCENT.
  WINDS - 20-FOOT.....DOWNSLOPE/DOWNVALLEY WINDS 3-7 MPH.

.TUESDAY...
  LAL.................2.
  HAINES INDEX........6 ..HIGH.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT CLOUD COVER).
                      ISOLATED SHOWERS AND THUNDERSTORMS.
  MAX TEMPERATURE.....90-94.
  MIN HUMIDITY........14-18 PERCENT.
  WINDS - 20-FOOT.....UPSLOPE/UPVALLEY WINDS 3-7 MPH BECOMING SOUTHWEST
                      15-25 MPH WITH GUSTS TO 50 MPH POSSIBLE IN THE LATE
                      AFTERNOON.

.OUTLOOK FOR WEDNESDAY...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......820.
  SKY/WEATHER.........SUNNY (0-10 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....88-92.
  MIN HUMIDITY........10-14 PERCENT.
  WINDS - 20-FOOT.....UPSLOPE/UPVALLEY WINDS 3-7 MPH BECOMING SOUTHWEST 8-12
                      MPH IN THE AFTERNOON.



FORECASTER...TRAPHAGAN
REQUESTED BY...HABERSTICK
REASON FOR REQUEST...WILDFIRE
.TAG 20110718.PATTE.01/SLC

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