FNUS75 KSLC 010151
FWSSLC

SPOT FORECAST FOR STUMP SPRINGS FIRE
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
751 PM MDT FRI MAY 31 2013

.DISCUSSION...COOL NORTHWEST FLOW TODAY WILL GIVE WAY TO A RAPID
WARMING TREND LATER THIS WEEKEND. RELATIVE HUMIDITY VALUES WILL
REMAIN LOW THROUGH THE WEEKEND WITH MINIMUM AFTERNOON VALUES
DROPPING BELOW 15 PERCENT FOLLOWED BY POOR OVERNIGHT RECOVERIES.

NORTHWEST WINDS ARE EXPECTED TO LINGER THROUGH THE EARLY SATURDAY
BEFORE SWITCHING TO THE SOUTHEAST ON SATURDAY AFTERNOON. AN UPPER
LEVEL RIDGE WILL BUILD OVER THE REGION ON SATURDAY PRODUCING A
SUBSIDENCE INVERSION OVER THE FIRE LOCATION. THIS WILL RESULT IN
POOR VENTILATION ON SATURDAY WITH LIMITED MIXING AND LIGHT
TRANSPORT WINDS. ON SUNDAY TEMPERATURES WILL WARM RAPIDLY AHEAD OF
A STORM SYSTEM MOVING THROUGH THE NORTHERN INTERMOUNTAIN REGION.
THIS WILL LEAD TO GREATER MIXING DEPTH AND INCREASED SOUTHERLY
TRANSPORT WINDS.

.TONIGHT...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  SKY/WEATHER.........MOSTLY CLEAR (0-10 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....43-47.
  MAX HUMIDITY........27-31 PERCENT.
  WINDS - 20-FOOT.....NORTH WINDS 5 TO 10 MPH WITH GUSTS TO 15 MPH.

.SATURDAY...
  LAL.................1.
  HAINES INDEX........5 ..MODERATE.
  CLEARING INDEX......250.
  SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....70-74.
  MIN HUMIDITY........7-11 PERCENT.
  WINDS - 20-FOOT.....NORTH WINDS 5 TO 10 MPH SHIFTING TO THE SOUTHEAST
                      IN THE LATE MORNING AND AFTERNOON.

.OUTLOOK FOR SUNDAY...
  LAL.................1.
  HAINES INDEX........6 ..HIGH.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....78-82.
  MIN HUMIDITY........8-12 PERCENT.
  WINDS - 20-FOOT.....LIGHT AND VARIABLE EARLY BECOMING SOUTH
                      5 TO 10 MPH WITH GUSTS TO 15 MPH POSSIBLE IN THE
                      AFTERNOON.



FORECASTER...GRAHAM
REQUESTED BY...CHRISTENSEN
REASON FOR REQUEST...WILDFIRE
.TAG 20130531.STUMP.02/SLC

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