842
FNUS75 KGJT 182256
FWSGJT
SPOT FORECAST FOR MIDDLE FORK FIRE...WY-MRF
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
456 PM MDT FRI SEP 18 2020
FORECAST IS BASED ON FORECAST START TIME OF 1800 MDT ON SEPTEMBER 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
A DISTURBANCE AND ASSOCIATED COLD FRONT WILL DIG
INTO THE WEST COAST TONIGHT. THIS WILL LEAD TO INCREASED
SOUTHWEST FLOW ALOFT WITH GUSTY CONDITIONS EXPECTED AT THE FIRE
SATURDAY AFTERNOON. ISOLATED TO SCATTERED SHOWERS WILL ACCOMPANY
THE FRONT'S PASSAGE SATURDAY BUT THE CHANCE FOR WETTING RAINS
REMAINS AROUND 10% WITH MINIMAL ACCUMULATION EXPECTED. DRIER AND
COOLER AIR WILL FILTER INTO THE REGION FOR SUNDAY.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (50-60%) THEN BECOMING MOSTLY
CLOUDY (70-80%) AFTER 2200.
MIN TEMPERATURE.....45-50 F.
MAX HUMIDITY........29-34%.
WIND (20 FT)........WEST WINDS 5 TO 10 MPH THROUGH SUNSET, THEN
BECOMING DOWNSLOPE/DOWNVALLEY OVERNIGHT.
SMOKE DISPERSAL.....GOOD QUICKLY DECREASING TO POOR AROUND 1900.
HAINES INDEX........6 OR HIGH.
LAL.................1.
MIXING HEIGHT.......9500 FT AGL DECREASING TO 900 FT AGL AFTER
MIDNIGHT.
TRANSPORT WINDS.....WEST 6 TO 12 MPH SHIFTING TO THE SOUTH AFTER
2200.
SATURDAY
SKY/WEATHER.........PARTLY CLOUDY (40-50%). ISOLATED SHOWERS IN THE
AFTERNOON.
MAX TEMPERATURE.....61-66 F.
MIN HUMIDITY........22-27%.
WIND (20 FT)........DOWNSLOPE/DOWNVALLEY WINDS 5 TO 10 MPH THROUGH MID
MORNING, THEN BECOMING SOUTHWEST 10 TO 18 MPH WITH
GUSTS TO AROUND 30 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR THROUGH 1000, THEN GOOD. INCREASING TO
VERY GOOD BY LATE MORNING BEFORE BECOMING EXCELLENT
AROUND NOON.
HAINES INDEX........5 OR MODERATE.
LAL.................1.
MIXING HEIGHT.......700 FT AGL INCREASING TO 10900 FT AGL BY EARLY
TO MID AFTERNOON.
TRANSPORT WINDS.....SOUTH 8 TO 16 MPH INCREASING TO WEST-SOUTHWEST
20 TO 30 MPH AROUND NOON.
SATURDAY NIGHT
SKY/WEATHER.........MOSTLY CLOUDY (60-70%) THEN BECOMING PARTLY
CLOUDY (40-50%) AFTER MIDNIGHT. ISOLATED TO
SCATTERED SHOWERS.
MIN TEMPERATURE.....41-46 F.
MAX HUMIDITY........63-68%.
WIND (20 FT)........SOUTHWEST WINDS 10 TO 18 WITH GUSTS UP TO 30 MPH
THROUGH 2200, THEN BECOMING DOWNSLOPE/DOWNVALLEY
5 TO 10 MPH.
SMOKE DISPERSAL.....EXCELLENT QUICKLY DECREASING TO POOR AROUND 1900.
HAINES INDEX........5 OR MODERATE.
LAL.................1.
MIXING HEIGHT.......8100 FT AGL DECREASING TO 550 FT AGL AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST 10 TO 20 MPH DECREASING TO SOUTH 6 TO 12
MPH AROUND SUNSET.
SUNDAY
SKY/WEATHER.........MOSTLY SUNNY (10-20%).
MAX TEMPERATURE.....58-63 F.
MIN HUMIDITY........26-31%.
WIND (20 FT)........DOWNSLOPE/DOWNVALLEY WINDS 5 TO 10 MPH THROUGH MID
MORNING THEN BECOMING WEST 6 TO 12 MPH WITH GUSTS
UP TO 25 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR THROUGH MID MORNING, THEN FAIR. INCREASING TO
VERY GOOD BY LATE MORNING BEFORE BECOMING EXCELLENT
AROUND NOON.
HAINES INDEX........3 OR VERY LOW.
LAL.................1.
MIXING HEIGHT.......550 FT AGL INCREASING TO 9000 FT AGL BY MID AFTERNOON.
TRANSPORT WINDS.....SOUTH 6 TO 12 MPH THROUGH MID MORNING, THEN BECOMING
SOUTHWEST 15 TO 25 MPH IN THE AFTERNOON.
FORECASTER...MEGAN STACKHOUSE
REQUESTED BY...BRANDON VOEGTLE
TYPE OF REQUEST...WILDFIRE
.TAG 2012699.2/GJT
.DELDT 09/18/20
.FORMATTERVERSION 1.0.26
.EMAIL COCRC@FIRENET.GOV
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