FNUS75 KSLC 011434
FWSSLC

SPOT FORECAST FOR GRACE FIRE
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
834 AM MDT THU AUG 1 2013

.DISCUSSION...MOISTURE INCREASING FROM THE SOUTH WILL RESULT IN
SHOWERS AND THUNDERSTORMS IN THE VICINITY OF THE FIRE THIS
AFTERNOON. STORMS WILL INITIALLY DEVELOP OVER THE HIGHER
TERRAIN...AND THEN MOVE OVER ADJACENT VALLEYS. WETTING RAIN IS
EXPECTED WITH STORMS...AS DEEP MOISTURE WILL BE IN PLACE. IN THE
VICINITY OF THESE STORMS...EXPECT GUSTY AND ERRATIC WINDS. THE WIND
DIRECTION FORECAST FOR THIS AFTERNOON IS MEDIUM TO LOW
CONFIDENCE...AS 700MB WINDS FROM THE SOUTHWEST ALONG WITH A PRESSURE
GRADIENT WILL SUPPORT SOUTHWESTERLY WINDS. HOWEVER...CONCERNED THAT
AFTERNOON NORTHERLY DIURNAL WINDS WILL OVERCOME SOUTHERLY FREE-AIR
WINDS. THIS TUG-OF-WAR BETWEEN DIURNAL AND UPPER LEVEL WINDS...ALONG
WITH GUSTY WINDS FROM THUNDERSTORMS MAY RESULT IN FREQUENTLY
SHIFTING WIND DIRECTION THIS AFTERNOON.

STORM ACTIVITY WILL DECREASE TOMORROW AFTERNOON AS MOISTURE RETREATS
TO THE SOUTHEAST.

.TODAY...
  LAL.................2 UNTIL NOON...THEN 4.
  HAINES INDEX........3 ..VERY LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT CLOUD COVER)
                      UNTIL NOON...THEN MOSTLY CLOUDY (70-80
                      PERCENT CLOUD COVER). A SLIGHT CHANCE OF
                      SHOWERS AND THUNDERSTORMS UNTIL NOON...THEN A
                      CHANCE OF SHOWERS AND THUNDERSTORMS.
  MAX TEMPERATURE.....75-79.
  MIN HUMIDITY........26-28 PERCENT.
  WINDS - 20-FOOT.....EAST NORTHEAST 5 TO 10 MPH UNTIL 1000 THEN
                      SHIFTING TO THE WEST NORTHWEST 7 TO 12 MPH.
                      WINDS WILL BECOME WEST SOUTHWEST 7 TO 12 MPH
                      AFTER 1300. WINDS WILL BE GUSTY AND ERRATIC
                      IN THE VICINITY OF THUNDERSTORMS.

.TONIGHT...
  LAL.................3 UNTIL MIDNIGHT...THEN 1.
  HAINES INDEX........3 ..VERY LOW.
  SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT CLOUD COVER). A
                      CHANCE OF SHOWERS AND THUNDERSTORMS UNTIL
                      MIDNIGHT.
  MIN TEMPERATURE.....59-62.
  MAX HUMIDITY........68-70 PERCENT.
  WINDS - 20-FOOT.....EAST NORTHEAST 5 TO 10 MPH AFTER 2000.

.OUTLOOK FOR FRIDAY...
  LAL.................1 UNTIL NOON...THEN 2.
  HAINES INDEX........3 ..VERY LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT CLOUD COVER) THEN
                      BECOMING PARTLY CLOUDY (45-55 PERCENT CLOUD
                      COVER). A SLIGHT CHANCE OF SHOWERS AND
                      THUNDERSTORMS IN THE AFTERNOON.
  MAX TEMPERATURE.....81-85.
  MIN HUMIDITY........83-27 PERCENT.
  WINDS - 20-FOOT.....NORTH NORTHWEST 5 TO 10 MPH.



FORECASTER...HOSENFELD
REQUESTED BY...CHRISTENSEN
REASON FOR REQUEST...WILDFIRE
.TAG 20130801.GRACE.01/SLC

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