FNUS75 KSLC 051408
FWSSLC

SPOT FORECAST FOR TWITCHELL CANYON
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
808 AM MDT THU AUG 5 2010

.DISCUSSION...ISOLATED SHOWERS AND THUNDERSTORMS HAVE DEVELOPED
THIS MORNING ACROSS THE AREA...WITH ONE STORM JUST EAST OF THE
FIRE AS OF 800 AM MDT. THIS STORM IS SLOWLY DISSIPATING...BUT
COULD STILL PRODUCE GUSTY WINDS AND CONTINUED LIGHTNING. SHOWERS
AND THUNDERSTORMS WILL INCREASE IN COVERAGE IN THE
AFTERNOON...WITH THE NORMAL THREATS EXPECTED...INCLUDING GUSTY
WINDS AND POSSIBLE HEAVY RAIN. THE THREAT OF THUNDERSTORMS WILL
SLOWLY DECREASE TOMORROW AND HEADING INTO THE WEEKEND...WITH
SIGNIFICANTLY DRIER AIR MOVING IN FROM THE WEST. THIS WILL LEAD
TO MUCH LOWER RH VALUES...LESS CLOUD COVER...AND GUSTY SOUTHWEST
WINDS LIKELY EACH DAY FOR THE BEGINNING OF NEXT WEEK.

.TODAY...
LAL...................2 UNTIL NOON...THEN 4.
HAINES INDEX..........3 ..VERY LOW.
CLEARING INDEX........1000+.
SKY/WEATHER...........PARTLY CLOUDY (45-55 PERCENT CLOUD COVER).
                      ISOLATED SHOWERS AND THUNDERSTORMS
                      UNTIL NOON...THEN SCATTERED SHOWERS AND
                      THUNDERSTORMS.
MAX TEMPERATURE.......79-82.
MIN HUMIDITY..........34-37 PERCENT.
WIND (20 FT)..........SOUTH WINDS 5 TO 10 MPH WITH GUSTS UP TO
                      15 MPH.

.TONIGHT...
LAL...................4 UNTIL MIDNIGHT...THEN 2.
HAINES INDEX..........4 ..LOW.
SKY/WEATHER...........PARTLY CLOUDY (35-45 PERCENT CLOUD COVER).
                      SCATTERED SHOWERS AND THUNDERSTORMS UNTIL
                      MIDNIGHT...THEN A SLIGHT CHANCE OF SHOWERS
                      AND THUNDERSTORMS.
MIN TEMPERATURE.......53-56.
MAX HUMIDITY..........63-66 PERCENT.
WIND (20 FT)..........SOUTHWEST WINDS 10 TO 15 MPH. PERIODS OF
                      LIGHT DOWNSLOPE/DOWNVALLEY WINDS ARE
                      POSSIBLE.

.OUTLOOK FOR FRIDAY...
LAL...................2.
HAINES INDEX..........5 ..MODERATE.
CLEARING INDEX........1000+.
SKY/WEATHER...........PARTLY CLOUDY (35-45 PERCENT CLOUD COVER). A
                      SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS.
MAX TEMPERATURE.......80-83.
MIN HUMIDITY..........26-29 PERCENT.
WIND (20 FT)..........SOUTH WINDS 10 TO 15 MPH.



FORECASTER...SCHOENING
REQUESTED BY...CLAY MATHESON
REASON FOR REQUEST...WILDFIRE
.TAG 20100805.TWITC.01/SLC

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