FNUS75 KSLC 111800
FWSSLC

SPOT FORECAST FOR CLEAR TRAP
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1200 PM MDT FRI MAY 11 2012

.DISCUSSION...A COLD FRONT PASSED THROUGH THE BURN SITE YESTERDAY.
WE ARE EXPECTING THE CANYONS FROM INTERSTATE-15 WESTWARD TO SHOW
GUSTY NORTHEAST WINDS EACH OF THE NEXT FEW MORNINGS...BUT THE
BURN SITE LOOKS TO BE MORE PROTECTED AND SHOULD SEE MORE TYPICAL
LIGHTER DIURNAL WIND CYCLES. THE AIRMASS WILL BEGIN TO MODERATE
AGAIN...LEADING TO A DRYING AND WARMING TREND THIS WEEKEND INTO
EARLY NEXT WEEK. GIVEN THIS TREND...EXPECT TO SEE LOW RH VALUES
DEVELOP QUICKLY DURING THE EARLY TO MID MORNING HOURS TOMORROW
AND PERSIST THROUGHOUT THE REMAINDER OF THE DAY.

SOUTHWEST WINDS MAY PICK UP TUESDAY AHEAD OF THE NEXT
DISTURBANCE. AS WE SEE IT NOW...A COOL FRONT WILL SAG INTO UTAH
AND SETTLE THE WINDS DOWN WEDNESDAY BEFORE THEY INCREASE AGAIN
WELL AHEAD OF THE NEXT PACIFIC DISTURBANCE FOR THE SECOND HALF OF
THE WORK WEEK. THIS DISTURBANCE IS EXPECTED TO CROSS UTAH SOMETIME
NEXT WEEKEND ELEVATING THE CHANCE OF A SCATTERED THUNDERSTORM.
CURRENTLY THE END OF OUR MODEL GUIDANCE IS SUNDAY.

.TODAY...
  LAL.................1 UNTIL NOON...THEN 2.
  HAINES INDEX........5 ..MODERATE.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT CLOUD COVER)
                      UNTIL NOON...THEN PARTLY CLOUDY (40-50
                      PERCENT CLOUD COVER). A SLIGHT CHANCE OF
                      SHOWERS AND THUNDERSTORMS AFTER NOON.
  MAX TEMPERATURE.....77-79.
  MIN HUMIDITY........12-14 PERCENT.
  WINDS - 20-FOOT.....WEST SOUTHWEST WINDS 5 TO 10 MPH.

.TONIGHT...
  LAL.................1.
  HAINES INDEX........5 ..MODERATE.
  SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....40.
  MAX HUMIDITY........54-56 PERCENT.
  WINDS - 20-FOOT.....WEST SOUTHWEST WINDS 10 MPH...BECOMING
                      NORTH NORTHEAST AROUND 2100 AND DIMINISHING
                      LATE.

.OUTLOOK FOR SATURDAY...
  LAL.................1.
  HAINES INDEX........6 ..HIGH.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........SUNNY (0-10 PERCENT CLOUD COVER) THEN
                      BECOMING PARTLY CLOUDY (30-40 PERCENT CLOUD
                      COVER).
  MAX TEMPERATURE.....74-76.
  MIN HUMIDITY........10-12 PERCENT.
  WINDS - 20-FOOT.....NORTHEAST WINDS 5 MPH...BECOMING WEST
                      SOUTHWEST 10 TO 20 MPH AROUND 1000.



FORECASTER...ROGOWSKI
REQUESTED BY...TAIGA ROHRER
REASON FOR REQUEST...PRESCRIBED
.TAG 20120511.CLEAR.01/SLC

$$