FNUS75 KSLC 241412
FWSSLC

SPOT FORECAST FOR LIGHTHOUSE
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
812 AM MDT TUE JUL 24 2012

.DISCUSSION...DEEP MONSOONAL MOISTURE WILL REMAIN IN PLACE ACROSS
THE STATE FOR ANOTHER 18 HOURS BEFORE DRIER AIR MOVES IN FROM THE
WEST. THUNDERSTORM DEVELOPMENT IS ONCE AGAIN EXPECTED OVER THE
BOOK CLIFFS AFTER 1200...WITH STORM MOTIONS MOVING SLOWLY FROM
THE SOUTHWEST TO THE NORTHEAST. VERY WET...THESE STORMS WILL BRING
A CHANCE FOR WETTING RAINS WITH BRIEF BUT INTENSE RAINFALL
RATES AT TIMES. A 30 PERCENT CHANCE FOR WETTING RAINS EXISTS THIS
AFTERNOON/EVENING...WITH A 10 PERCENT CHANCE OF .25-50 INCHES OF
ACCUMULATION...BUT SHOULD SEE FOCUSED DEVELOPMENT JUST NORTH OF
THE FIRE SITE. WINDS WILL REMAIN PRIMARILY LIGHT AND TERRAIN
DRIVEN BUT BRIEF GUSTS UP TO 35 MPH ARE POSSIBLE WITH OUTFLOWS
FROM ADJACENT STORMS. THESE GUSTS WILL MOST LIKELY MOVE
DOWNCANYON FROM THE NORTHWEST. BULK OF STORM POTENTIAL WILL
DISSIPATE THIS EVENING BUT CAN NOT RULE OUT PASSING SHOWERS
DURING THE OVERNIGHT HOURS.

A DRIER WESTERLY FLOW ALOFT WILL MOVE INTO THE AREA TOMORROW
AS HIGH PRESSURE CENTERS OVER THE STATE. THE HIGH PRESSURE ALOFT
WILL AID TO SUPPRESS THUNDERSTORM DEVELOPMENT FOR WEDNESDAY
AFTERNOON BUT ISOLATED STORMS WITH LESS RAINFALL POTENTIAL WILL
REMAIN POSSIBLE AFTER 1200. WINDS WILL REMAIN MAINLY LIGHT
AND TERRAIN DRIVEN...WITH RH TRENDS DRYING SLIGHTLY.
MOISTURE WILL BEGIN TO INCREASE AGAIN ON THURSDAY AS HIGH
PRESSURE SHIFTS EAST OF THE AREA ALLOWING A MOIST SOUTHERLY
FLOW TO DEVELOP AGAIN.

.TODAY...
  LAL.................2 UNTIL NOON...THEN 3.
  HAINES INDEX........3 ..VERY LOW.
  CLEARING INDEX......770.
  SKY/WEATHER.........PARTLY CLOUDY (60-70 PERCENT CLOUD COVER). A
                      SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
                      UNTIL NOON...THEN A CHANCE OF SHOWERS AND
                      THUNDERSTORMS.
  MAX TEMPERATURE.....85-87.
  MIN HUMIDITY........32-34 PERCENT.
  WINDS - 20-FOOT.....EAST WINDS 5 TO 10 MPH BECOMING
                      UPSLOPE/UPVALLEY LATE MORNING AND EARLY
                      AFTERNOON...BRIEF GUSTS TO 35 MPH POSSIBLE
                      WITH PASSING STORMS IN THE AFTERNOON.
                      DIRECTION OF GUSTS MOST LIKELY FROM THE
                      NORTHWEST.

.TONIGHT...
  LAL.................3 UNTIL MIDNIGHT...THEN 2.
  HAINES INDEX........3 ..VERY LOW.
  SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT CLOUD COVER). A
                      CHANCE OF SHOWERS AND THUNDERSTORMS UNTIL
                      MIDNIGHT...THEN A SLIGHT CHANCE OF SHOWERS
                      AND THUNDERSTORMS.
  MIN TEMPERATURE.....60-62.
  MAX HUMIDITY........78-80 PERCENT.
  WINDS - 20-FOOT.....NORTHWEST WINDS 10 MPH SHIFTING TO THE
                      NORTHEAST AFTER MIDNIGHT.

.OUTLOOK FOR WEDNESDAY...
  LAL.................1 UNTIL NOON...THEN 2.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......880.
  SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT CLOUD COVER). A
                      SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN
                      THE AFTERNOON.
  MAX TEMPERATURE.....85-87.
  MIN HUMIDITY........24-26 PERCENT.
  WINDS - 20-FOOT.....EAST WINDS 5 MPH SHIFTING TO THE NORTH LATE
                      IN THE MORNING...THEN SHIFTING TO THE
                      SOUTHEAST EARLY IN THE AFTERNOON SHIFTING TO
                      THE WEST LATE IN THE AFTERNOON.



FORECASTER...MERRILL
REQUESTED BY...WILLIAMS
REASON FOR REQUEST...WILDFIRE
.TAG 20120724.LIGHT.01/SLC

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