FNUS75 KSLC 151018
FWSSLC

SPOT FORECAST FOR RHYOLITE
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
418 AM MDT SUN JUL 15 2012

.DISCUSSION....SOME DRYING HAS BEEN NOTED OVER EXTREME NORTHWESTERN
UTAH OVERNIGHT WITH THE RYOLITE FIRE SITE BEING RIGHT ON THE EDGE
OF DEEPER MOISTURE TO THE SOUTH. THIS SAID...EXPECTING DRYER AIR
TO CONTINUE TO NOSE IN OUT OF NEVADA TODAY DIMINISHING WETTING
RAIN POTENTIAL VERSUS YESTERDAY. HOWEVER THE BORDERLINE BETWEEN
THE DRY AND MOIST AIR CAN BE A FOCUS FOR THUNDERSTORM DEVELOPMENT
DURING THE PEAK HEATING HOURS AND GUIDANCE DOES SHOW DEVELOPMENT
BEGINNING AFTER 1200 IN THE VICINITY. RATHER THAN A PROLONGED AND
MORE STRATIFORM RAIN EVENT LIKE YESTERDAY SUSPECT MORE CELLULAR
DEVELOPMENT NEAR AND SOUTHWEST OF THE SITE. THE MOST LIKELY OUTCOME
FROM THIS WILL BE GUSTY OUTFLOW WINDS BUT CAN NOT RULE OUT
ANOTHER ROUND OF BRIEF WETTING RAINS AND A FEW LIGHTNING STRIKES
BETWEEN 1300-1900.

THUNDERSTORM POTENTIAL WILL WANE OVERNIGHT BUT MOISTURE WILL
SURGE BACK INTO THE AREA FOR MONDAY BRINGING ANOTHER FAIRLY
ACTIVE AFTERNOON OF SHOWERS AND THUNDERSTORMS. HUMIDITY WILL
TREND TO DECREASE SLIGHTLY DURING THAT TIME BUT NOT BY TOO MUCH.
THE MORE PRONOUNCED DRYING TREND LOOKS TO FALL IN THE TUESDAY
THROUGH THURSDAY TIMEFRAME...THIS ALLOWING TEMPS TO WARM ONCE
AGAIN.

.TODAY...
  LAL.................2 UNTIL NOON...THEN 4.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........PARTLY CLOUDY (60-70 PERCENT CLOUD COVER). A
                      SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
                      BETWEEN 1000-1200...THEN A CHANCE OF SHOWERS AND
                      THUNDERSTORMS.
  MAX TEMPERATURE.....83-85.
  MIN HUMIDITY........32-38 PERCENT.
  WINDS - 20-FOOT.....NORTH WINDS 5 MPH SHIFTING TO THE EAST IN THE
                      LATE MORNING AND EARLY AFTERNOON...THEN
                      INCREASING TO SOUTHEAST 15 MPH LATE IN THE
                      AFTERNOON. GUSTY OUTFLOW WINDS UP TO 40 MPH
                      POSSIBLE WITH PASSING STORMS IN THE AFTERNOON.

.TONIGHT...
  LAL.................3 UNTIL 2200...THEN 1.
  HAINES INDEX........3 ..VERY LOW.
  SKY/WEATHER.........PARTLY CLOUDY (60-70 PERCENT CLOUD COVER)
                      UNTIL MIDNIGHT...THEN MOSTLY CLOUDY (75-85
                      PERCENT CLOUD COVER). A CHANCE OF SHOWERS AND
                      THUNDERSTORMS UNTIL 2200.
  MIN TEMPERATURE.....64-66.
  MAX HUMIDITY........65-71 PERCENT.
  WINDS - 20-FOOT.....WEST WINDS 10 TO 15 MPH UNTIL EARLY MORNING
                      BECOMING LIGHT AND VARIABLE.

.OUTLOOK FOR MONDAY...
  LAL.................1 UNTIL NOON...THEN 3.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT CLOUD COVER). A
                      CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
                      AFTERNOON.
  MAX TEMPERATURE.....81-83.
  MIN HUMIDITY........30-38 PERCENT.
  WINDS - 20-FOOT.....EAST WINDS 5 MPH SHIFTING TO THE NORTH LATE
                      IN THE MORNING...THEN SHIFTING TO THE SOUTH
                      IN THE AFTERNOON. GUSTY AND ERRATIC OUTFLOW
                      WINDS POSSIBLE WITH PASSING STORMS.



FORECASTER...MERRILL
REQUESTED BY...BRAD WASHA
REASON FOR REQUEST...WILDFIRE
.TAG 20120714.RHYOL.01/SLC

$$