FNUS75 KSLC 091513
FWSSLC

SPOT FORECAST FOR ZION CANYON GRASS
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
813 AM MST THU FEB 9 2012

.DISCUSSION...A RIDGE OF HIGH PRESSURE WILL BE BUILDING OVER THE
AREA TODAY. NORTH WINDS ALOFT AND DRAINAGE FLOW OUT OF THE CANYON
WILL COMBINE FOR GOOD TRANSPORT WINDS THIS MORNING. HOWEVER...THERE
IS AN INVERSION THAT IS ABOUT 1000 FT ABOVE THE SURFACE THAT WILL
NOT BE BROKEN UNTIL ABOUT 1300-1400 MST THIS AFTERNOON. AT THAT TIME
THE WINDS WILL SHIFT TO SOUTH SOUTHWEST (UP CANYON) AT THE SURFACE
BUT REMAIN OUT OF THE NORTH NORTHEAST FROM ABOUT 500 FT AGL AND
ABOVE. ALTHOUGH THE CLEARING INDEX WILL BE ABOVE 600 THE SMOKE IS
LIKELY TO SPREAD OUT ABOVE SPRINGDALE. THE RIDGE IS OVERHEAD
FRIDAY RESULTING IN A POOR CLEARING INDEX.

.TODAY...
  LAL.................1.
  HAINES INDEX........2 ..VERY LOW.
  CLEARING INDEX......600.
  SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....65-67.
  MIN HUMIDITY........16-19 PERCENT.
  WINDS - 20-FOOT.....NORTH NORTHEAST WINDS 6-9 MPH WITH GUSTS TO
                      17 MPH THROUGH 1300 MST...SHIFTING TO THE
                      SOUTHWEST AT 4-7 MPH WITH GUSTS TO 13 MPH
                      IN THE AFTERNOON.

.TONIGHT...
  LAL.................1.
  HAINES INDEX........2 ..VERY LOW.
  SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....35-37.
  MAX HUMIDITY........70-72 PERCENT.
  WINDS - 20-FOOT.....NORTHWEST WINDS 10 MPH SHIFTING TO THE
                      NORTHEAST IN THE LATE EVENING AND OVERNIGHT.

.OUTLOOK FOR FRIDAY...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......200.
  SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....66-68.
  MIN HUMIDITY........18-20 PERCENT.
  WINDS - 20-FOOT.....NORTHEAST WINDS 5 MPH SHIFTING TO THE SOUTH
                      IN THE AFTERNOON.



FORECASTER...STRUTHWOLF
REQUESTED BY...JAMES COURTRIGHT
REASON FOR REQUEST...PRESCRIBED
.TAG 20120209.ZIONC.01/SLC

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