FNUS75 KSLC 171346
FWSSLC

SPOT FORECAST FOR PRETTY TREE
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
745 AM MDT MON MAY 17 2010

.DISCUSSION...MILD SOUTHERLY FLOW IS OVER SOUTHERN UTAH TODAY
AHEAD OF A PACIFIC STORM. THE COLD FRONT WITH THIS SYSTEM WILL
CROSS THE PROJECT SITE LATE THIS AFTERNOON BUT WINDS WILL ONLY
SHIFT FROM SOUTHERLY TO SOUTHWESTERLY.

THERE IS A SMALL CHANCE OF A HIGH BASED DRY THUNDERSTORM THIS
AFTERNOON THAT WOULD PRODUCE LITTLE IF ANY RAIN BUT COULD
GENERATE BRIEF STRONG GUSTY WINDS.

STEADIER PRECIPITATION IS EXPECTED TO DEVELOP DURING EARLY
TUESDAY MORNING AND SHOULD START AS RAIN BUT WILL MIX WITH OR
CHANGE OVER TO SNOW DURING THE DAY ABOVE 8000 FEET. THE RAIN AND
SNOW WILL TAPER OFF TUESDAY EVENING WITH A COOL STABLE AIRMASS
SPREADING IN OVERNIGHT AND REMAINING IN PLACE ON WEDNESDAY.

WATER AMOUNTS OF PRECIPITATION SHOULD BE IN THE 0.10 TO 0.25 INCH
RANGE... WITH SOME OF THIS FALLING AS SNOW. SNOW ACCUMULATION
SHOULD BE IN THE 1 TO 2 INCH RANGE.

.TODAY...
LAL...................1 UNTIL NOON...THEN 2.
HAINES INDEX..........6 ..HIGH.
CLEARING INDEX........1000+.
SKY/WEATHER...........PARTLY CLOUDY (45-55 PERCENT CLOUD COVER).
                      A SLIGHT CHANCE OF HIGH BASED SHOWERS AND
                      DRY THUNDERSTORMS AFTER NOON.
MAX TEMPERATURE.......62-65.
MIN HUMIDITY..........14-17 PERCENT.
WIND (20 FT)..........BREEZY. NORTHEAST 5 MPH BECOMING SOUTHEAST
                      10-18 MPH BY 1000...THEN INCREASING TO SOUTH
                      15-25 MPH. GUSTY ERRATIC WINDS TO 40 MPH
                      NEAR THUNDERSTORMS.

.TONIGHT...
LAL...................2 UNTIL MIDNIGHT...THEN 1.
HAINES INDEX..........3 ..VERY LOW.
SKY/WEATHER...........MOSTLY CLOUDY (75-85 PERCENT CLOUD COVER). A
                      SLIGHT CHANCE OF HIGH BASED SHOWERS AND DRY
                      THUNDERSTORMS UNTIL MIDNIGHT...THEN A CHANCE
                      OF SHOWERS.
MIN TEMPERATURE.......35-38.
MAX HUMIDITY..........57-60 PERCENT.
WIND (20 FT)..........SOUTHWEST WINDS 10-15 MPH.

.OUTLOOK FOR TUESDAY...
LAL...................1 UNTIL NOON...THEN 2.
HAINES INDEX..........3 ..VERY LOW.
CLEARING INDEX........1000+.
SKY/WEATHER...........CLOUDY (90-100 PERCENT CLOUD COVER).
                      OCCASIONAL RAIN AND SNOW. A SLIGHT CHANCE OF
                      THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.......NEAR 50.
MIN HUMIDITY..........43-46 PERCENT.
WIND (20 FT)..........SOUTHWEST WINDS 10-15 MPH.



FORECASTER...SEAMAN
REQUESTED BY...CHRISTENSEN
REASON FOR REQUEST...PRESCRIBED
.TAG 20100517.PRETT.01/SLC

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