FNUS75 KSLC 081339
FWSSLC

SPOT FORECAST FOR TWITCHELL CANYON
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
739 AM MDT SUN AUG 8 2010

.DISCUSSION...A MOIST AIRMASS WILL REMAIN OVER THE FIRE SITE
TODAY...AND INSTABILITY FROM AN APPROACHING TROUGH WILL ALLOW FOR
SCATTERED SHOWERS AND THUNDERSTORMS FOR MUCH OF THE DAY. WINDS
WILL BE GENERALLY LIGHT AND TERRAIN DRIVEN...BUT COULD BECOME
GUSTY AND ERRATIC IN THE PRESENCE OF THUNDERSTORMS. SHOWERS AND
THUNDERSTORMS REMAIN A THREAT THROUGH MONDAY AS THE TROUGH PUSHES
THROUGH NORTHERN UTAH. A DRIER AND MORE STABLE AIRMASS WILL BUILD
INTO THE AREA BY EARLY TUESDAY.

.TODAY...
LAL...................3 UNTIL NOON...THEN 4.
HAINES INDEX..........4 ..LOW.
CLEARING INDEX........1000+.
SKY/WEATHER...........PARTLY CLOUDY (60-70 PERCENT CLOUD COVER)
                      UNTIL NOON...THEN MOSTLY CLOUDY (65-75
                      PERCENT CLOUD COVER). WIDELY SCATTERED SHOWERS
                      AND THUNDERSTORMS UNTIL NOON...THEN SCATTERED SHOWERS
                      AND THUNDERSTORMS.
MAX TEMPERATURE.......76-80.
MIN HUMIDITY..........26-30 PERCENT.
WIND (20 FT)..........UPSLOPE/UPVALLEY WINDS 3-7 MPH BECOMING SOUTH 5-10
                      MPH IN THE AFTERNOON.

.TONIGHT...
LAL...................4 UNTIL MIDNIGHT...THEN 3.
HAINES INDEX..........4 ..LOW.
SKY/WEATHER...........PARTLY CLOUDY (65-75 PERCENT CLOUD COVER).
                      SCATTERED SHOWERS AND THUNDERSTORMS UNTIL
                      MIDNIGHT...THEN WIDELY SCATTERED SHOWERS AND
                      THUNDERSTORMS.
MIN TEMPERATURE.......49-53.
MAX HUMIDITY..........73-77 PERCENT.
WIND (20 FT)..........SOUTH WINDS 5-10 MPH.

.OUTLOOK FOR MONDAY...
LAL...................3.
HAINES INDEX..........5 ..MODERATE.
CLEARING INDEX........1000+.
SKY/WEATHER...........PARTLY CLOUDY (60-70 PERCENT CLOUD COVER). A
                      CHANCE OF SHOWERS AND THUNDERSTORMS.
MAX TEMPERATURE.......78-82.
MIN HUMIDITY..........20-24 PERCENT.
WIND (20 FT)..........UPSLOPE/UPVALLEY WINDS 3-7 MPH.



FORECASTER...TRAPHAGAN
REQUESTED BY...CLAY MATHESON
REASON FOR REQUEST...WILDFIRE
.TAG 20100808.TWITC.01/SLC

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