FNUS75 KSLC 121555
FWSSLC

SPOT FORECAST FOR LAKE FORK
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
955 AM MDT WED AUG 12 2009

.DISCUSSION...HIGH PRESSURE ALOFT HAS SHIFTED SLIGHTLY EAST THIS
MORNING AND WILL BECOME NEARLY STATIONARY IN THE VICINITY OF THE
FOUR CORNERS THROUGH THURSDAY. MOISTURE ROTATING AROUND THE HIGH
IS BEGINNING TO INCREASE OVER SOUTHERN UTAH AT THIS TIME...BUT
SHOULD REMAIN SOUTH OF LAKE FORK TODAY. THAT SAID...MID AND HIGH
LEVEL MOISTURE WILL GRADUALLY SPREAD NORTH TONIGHT AND THURSDAY
INCREASING THE THREAT FOR ISOLATED AFTERNOON SHOWERS AND
THUNDERSTORMS CAPABLE OF PRODUCING BRIEF ERRATIC WIND GUSTS AND
ISOLATED DRY LIGHTNING STRIKES TOMORROW AFTERNOON. DIURNAL SLOPE
FLOWS WILL CONTINUE TO DOMINATED THE WIND PATTERNS FOR THE NEXT
24 HOURS...BUT A GRADUAL INCREASE IN SOUTHWEST FLOW ALOFT WILL
BEGIN TO INCREASE RIDGETOP GUSTS AS EARLY AS THURSDAY AFTERNOON
AS THE NEXT DRY COLD FRONT APPROACHES FROM THE NORTHWEST. WARM
AND DRY CONDITIONS WITH INCREASING SOUTHWEST FLOW THROUGHOUT ALL
ELEVATIONS WILL OCCUR FRIDAY IN ADVANCE OF A FRIDAY NIGHT COLD
FRONTAL PASSAGE.

.TODAY...
  LAL.................1.
  HAINES INDEX........6 ..HIGH.
  CLEARING INDEX......670.
  SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT CLOUD COVER)
                      UNTIL NOON...THEN PARTLY CLOUDY (30-40
                      PERCENT CLOUD COVER).
  MAX TEMPERATURE.....88-91.
  MIN HUMIDITY........9-13 PERCENT.
  WINDS - 20-FOOT.....SOUTHWEST WINDS 7 TO 12 MPH.

.TONIGHT...
  LAL.................1.
  HAINES INDEX........6 ..HIGH.
  SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....51-54.
  MAX HUMIDITY........39-42 PERCENT.
  WINDS - 20-FOOT.....SOUTHWEST WINDS 10 MPH SHIFTING DOWNSLOPE
                      3 TO 6 MPH AFTER 9 PM.

.OUTLOOK FOR THURSDAY...
  LAL.................1 UNTIL NOON...THEN 2.
  HAINES INDEX........5 ..MODERATE.
  CLEARING INDEX......820.
  SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT CLOUD COVER).
                      ISOLATED SHOWERS AND THUNDERSTORMS IN
                      THE AFTERNOON.
  MAX TEMPERATURE.....89-92.
  MIN HUMIDITY........10-13 PERCENT.
  WINDS - 20-FOOT.....DOWNSLOPE 3 TO 6 MPH THROUGH 8 AM THEN BECOMING
                      SOUTHWEST WINDS 5 TO 10 MPH. BRIEF ERRATIC
                      WINDS WITH ANY PASSING SHOWER OR STORM IN THE
                      AFTERNOON. RIDGETOP GUSTS TO 25 MPH DURING PEAK
                      HEATING.



FORECASTER...MERRILL
REQUESTED BY...ALLAN HEPWORTH
REASON FOR REQUEST...WFU
.TAG 20090812.LAKEF.01/SLC

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