FNUS75 KSLC 121026
FWSSLC

SPOT FORECAST FOR SPRING FIRE
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
426 AM MDT FRI AUG 12 2011

.DISCUSSION...THE RIDGE WILL BUILD DIRECTLY OVERHEAD TODAY RESULTING IN
LIGHTER WINDS THAN PREVIOUS AFTERNOON. WINDS SHOULD BE WESTERLY
INTO THE EARLY AFTERNOON BEFORE BECOMING NORTHWEST. GUSTS AROUND
20 MPH ARE STILL POSSIBLE. THIS RIDGE WILL SLIDE EASTWARD ON
SATURDAY...ALLOWING MOISTURE THAT IS POISED OVER ARIZONA TO SURGE
NORTHWARD AND POSSIBLY SPREAD TO YOUR FIRE BY VERY LATE AFTERNOON OR
EVENING. SINCE THE MOISTURE WILL BE AT HIGH LEVELS INITIALLY...THE
MAIN THREAT WILL BE DRY THUNDERSTORMS PRODUCING GUSTY AND ERRATIC
WINDS LATE SATURDAY AFTERNOON OR EVENING. DRY THUNDERSTORMS ARE
STILL POSSIBLE EARLY SUNDAY BUT MOISTURE WILL INCREASE AND LOWER
BY MIDDAY SUNDAY FOR SCATTERED SHOWERS AND THUNDERSTORMS.

THIS MOISTURE INFLUX OVER THE EASTERN GREAT BASIN WILL BE SHORT
LIVED WITH YOUR FIRE SITE DRYING OUT ALREADY BY MONDAY EVENING. GUSTY
SURFACE WINDS IN COMBINATION WITH LOW RELATIVE HUMIDITY IS
POSSIBLE BY TUESDAY.

.TODAY...
  LAL.................1.
  HAINES INDEX........5 ..MODERATE.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........SUNNY (0-10 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....73-75.
  MIN HUMIDITY........15-17 PERCENT.
  WINDS - 20-FOOT.....WEST SOUTHWEST 5-10 MPH THIS MORNING BECOMING
                      WEST AND THEN NORTHWEST AFTER 1400 AT AROUND 10
                      MPH WITH GUSTS TO 20 MPH.

.TONIGHT...
  LAL.................1.
  HAINES INDEX........5 ..MODERATE.
  SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....55-57.
  MAX HUMIDITY........30-35 PERCENT.
  WINDS - 20-FOOT.....NORTHWEST WINDS 10 MPH DECREASING TO 5 MPH
                      LATE IN THE EVENING...THEN BECOMING LIGHT AND
                      VARIABLE AFTER MIDNIGHT.

.OUTLOOK FOR SATURDAY...
  LAL.................1 UNTIL NOON...THEN 2.
  HAINES INDEX........5 ..MODERATE.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT CLOUD COVER) THEN
                      BECOMING PARTLY CLOUDY (35-45 PERCENT CLOUD
                      COVER). A SLIGHT CHANCE OF DRY THUNDERSTORMS
                      AFTER 1600 MDT.
  MAX TEMPERATURE.....75-77.
  MIN HUMIDITY........15-17 PERCENT.
  WINDS - 20-FOOT.....SOUTH WINDS 5 TO 10 MPH WITH GUSTS TO 20 MPH
                      POSSIBLE BY LATE AFTERNOON.



FORECASTER...STRUTHWOLF
REQUESTED BY...MARTELL GIBBONS
REASON FOR REQUEST...WILDFIRE
.TAG 20110811.SPRIN.01/SLC

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