FNUS75 KSLC 212200
FWSSLC

SPOT FORECAST FOR PRETTY TREE RX
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
400 PM MDT SUN APR 21 2013

.DISCUSSION...THE BURN SITE WILL REMAIN UNDER A SOMEWHAT UNSTABLE
WEST TO NORTHWEST FLOW DURING THE WEEK AS A SERIES OF WEAK STORM
SYSTEMS CROSS THE STATE. THE FIRST SYSTEM WILL MOVE THROUGH
BEGINNING TONIGHT...PUSHING A STRONG BUT DRY COLD FRONT THROUGH
THE BURN SITE TOMORROW AFTERNOON. LITTLE PRECIPITATION IS
EXPECTED...BUT WEST WINDS WILL BE GUSTY AT TIMES BEFORE WEAKER
NORTHERLY WINDS MOVE IN BEHIND THE FRONT LATE IN THE AFTERNOON. A
SECOND WEAKER SYSTEM WILL BRING A RE-ENFORCING SHOT OF COOLER AIR
TUESDAY NIGHT/WEDNESDAY MORNING. A MORE WEST TO SOUTHWEST FLOW
WILL DEVELOP FOR THURSDAY AS A STORM SYSTEM CROSSES ARIZONA. THE
BURN SITE WILL AGAIN SEE LITTLE IF ANY PRECIPITATION FROM THIS
SYSTEM...BUT IT WILL KEEP THE AIRMASS UNSTABLE ENOUGH FOR GOOD TO
EXCELLENT MIXING. HIGH PRESSURE IS EXPECTED TO MOVE IN NEXT
WEEKEND...BRINGING WARMER AND MORE STABLE CONDITIONS.

.REST OF TODAY...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....61-62.
  MIN HUMIDITY........17-18 PERCENT.
  WINDS - 20-FOOT.....UPSLOPE/UPVALLEY WINDS UP TO 5 MPH.

.TONIGHT...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....29-33.
  MAX HUMIDITY........44-48 PERCENT.
  WINDS - 20-FOOT.....DOWNSLOPE/DOWNVALLEY WINDS UP TO 5 MPH.

.OUTLOOK FOR MONDAY...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....56-60.
  MIN HUMIDITY........18-22 PERCENT.
  WINDS - 20-FOOT.....UPSLOPE/UPVALLEY WINDS 3-7 MPH INCREASING TO WEST
                      8-12 MPH IN THE AFTERNOON.



FORECASTER...TRAPHAGAN
REQUESTED BY...CHANCE STEWART
REASON FOR REQUEST...PRESCRIBED
.TAG 20130422.PRETT.01/SLC

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