FNUS75 KSLC 302328
FWSSLC

SPOT FORECAST FOR HELLS HOLLOW
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
528 PM MDT FRI SEP 30 2011

.DISCUSSION...MOISTURE HAS INCREASED TODAY SOUTH OF THE HELLS
HOLLOW SITE AND IS INDICATIVE OF WHAT WILL BE ON TAP STARTING
SATURDAY. HIGH PRESSURE HAS SHIFTED EAST ALLOWING SOUTHERLY FLOW
ALOFT TO INCREASE TODAY...BUT IN THE SHORT TERM ONLY A NET
INCREASE OF A FEW BUILDUPS ARE EXPECTED FOR THE REMAINDER OF THIS
EVENING AND OVERNIGHT TONIGHT. WINDS WILL REMAIN DIURNALLY SLOPE
DRIVEN THROUGH LATE TOMORROW MORNING BUT DO EXPECT A SLIGHT
INCREASE OF SOUTHEAST WINDS FOR THE EARLY AFTERNOON HOURS.
COINCIDENT WITH THIS INCREASE OF WINDS BUILDUPS LEADING TO
ISOLATED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO OCCUR OVER THE
TERRAIN TO THE WEST BRINGING A SLIGHT CHANCE OF LIGHT RAIN AND
BRIEFLY GUSTY OUTFLOW CONDITIONS FROM THE WEST-SOUTHWEST LATE IN
THE DAY SATURDAY.

MOISTURE TRENDS WILL CONTINUE TO INCREASE EACH DAY THROUGH EARLY
NEXT WEEK INCREASING THE CHANCES OF PRECIPITATION BUT MAINTAINING
EXCELLENT CLEARING INDICES UNDER INCREASING SOUTHWESTERLY FLOW
ALOFT.

.TONIGHT...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....44-46.
  MAX HUMIDITY........55-57 PERCENT.
  WINDS - 20-FOOT.....WEST WINDS 10 MPH SHIFTING TO THE SOUTH IN
                      THE LATE EVENING...BECOMING DOWNSLOPE
                      3-7 MPH FOR THE SECOND HALF OF THE NIGHT.

.SATURDAY...
  LAL.................1 UNTIL NOON...THEN 2.
  HAINES INDEX........3 ..VERY LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT CLOUD COVER). A
                      SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
                      AFTER NOON.
  MAX TEMPERATURE.....74-76.
  MIN HUMIDITY........22-24 PERCENT.
  WINDS - 20-FOOT.....DOWNSLOPE WINDS 3-7 MPH THROUGH ABOUT 1000
                      THEN BECOMING SOUTHEAST 5-10 GUSTING 15 MPH
                      THROUGH MID AFTERNOON. A SWITCH TO WEST
                      WINDS OF 5-15 MPH IS EXPECTED AFTER AROUND
                      1600. GUSTY OUTFLOW CONDITIONS POSSIBLE FROM
                      THUNDERSTORMS TO THE WEST LATE.

.OUTLOOK FOR SUNDAY...
  LAL.................2 UNTIL NOON...THEN 3.
  HAINES INDEX........3 ..VERY LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT CLOUD COVER). A
                      SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN
                      THE MORNING...THEN A CHANCE OF SHOWERS AND
                      THUNDERSTORMS IN THE AFTERNOON.
  MAX TEMPERATURE.....71-73.
  MIN HUMIDITY........32-34 PERCENT.
  WINDS - 20-FOOT.....SOUTHEAST WINDS 5-15 MPH SHIFTING TO THE
                      WEST 5-15 MPH IN THE AFTERNOON.



FORECASTER...MERRILL
REQUESTED BY...ERIC LAMALFA
REASON FOR REQUEST...PRESCRIBED
.TAG 20110930.HELLS.03/SLC

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