FNUS75 KSLC 091343
FWSSLC

SPOT FORECAST FOR PRETTY TREE RX
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
743 AM MDT WED MAY 9 2012

.DISCUSSION...A RIDGE OF HIGH PRESSURE ALOFT WILL MOVE OVERHEAD
TODAY RESULTING IN LIGHT WINDS AND LIMITED VENTILATION. HOWEVER IT
APPEARS MIXING THIS AFTERNOON WILL PUSH CLEARING INDICES JUST ABOVE
500. WEST-SOUTHWESTERLY FLOW WILL INCREASE A BIT THURSDAY AHEAD OF
A COLD FRONT WHICH IS EXPECTED TO MOVE INTO NORTHERN UTAH. THIS
INCREASED FLOW SHOULD ALLOW FOR EXCELLENT VENTILATION THURSDAY.
THE COLD FRONT WILL SLOW DOWN AS IT SAGS SOUTH...AND IS EXPECTED
TO STALL IN THE VICINITY OF THE BURN AREA THURSDAY NIGHT INTO
FRIDAY.

.TODAY...
  LAL.................1.
  HAINES INDEX........5 ..MODERATE.
  CLEARING INDEX......530.
  SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT CLOUD COVER) UNTIL
                      NOON...THEN PARTLY CLOUDY (35-45 PERCENT
                      CLOUD COVER).
  MAX TEMPERATURE.....64-67.
  MIN HUMIDITY........9-12 PERCENT.
  WINDS - 20-FOOT.....NORTHEAST/DOWNSLOPE 2-5 MPH BECOMING
                      SOUTH/UPSLOPE 5-10 MPH AFTER 1000.

.TONIGHT...
  LAL.................1.
  HAINES INDEX........5 ..MODERATE.
  SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....45-48.
  MAX HUMIDITY........30-33 PERCENT.
  WINDS - 20-FOOT.....NORTHEAST/DOWNSLOPE 4-9 MPH.

.OUTLOOK FOR THURSDAY...
  LAL.................1.
  HAINES INDEX........6 ..HIGH.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (0-10 PERCENT CLOUD COVER) THEN
                      BECOMING PARTLY CLOUDY (30-40 PERCENT CLOUD
                      COVER).
  MAX TEMPERATURE.....69-72.
  MIN HUMIDITY........9-12 PERCENT.
  WINDS - 20-FOOT.....NORTHEAST/DOWNSLOPE 2-5 MPH BECOMING
                      SOUTH-SOUTHWEST 6-12 MPH WITH GUSTS TO 20 MPH
                      AFTER 1000.



FORECASTER...SEAMAN
REQUESTED BY...GREGG CHRISTENSEN
REASON FOR REQUEST...PRESCRIBED
.TAG 20120509.PRETT.01/SLC

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