118
FNUS75 KGJT 181440
FWSGJT
SPOT FORECAST FOR WEST RIM UNIT 42B...BLM
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
840 AM MDT THU SEP 18 2025
FORECAST IS BASED ON IGNITION TIME OF 0900 MDT ON SEPTEMBER 18.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
WARM AND DRY CONDITIONS HIGHLIGHT TODAY'S FORECAST. SMOKE
DISPERSAL WILL IMPROVE FROM POOR TO FAIR BETWEEN 1800 AND 2000
MDT, RETURNING TO POOR AFTER 1800 MDT. CRITICAL FIRE WEATHER
CONDITIONS AND WETTING RAINS ARE NOT EXPECTED. RH VALUES INCREASE
TOMORROW AS MOISTURE MOVES INTO THE FOUR CORNERS REGION. ISOLATED
TO SCATTERED AFTERNOON THUNDERSTORMS DEVELOP FRIDAY AS A RESULT OF
THE INCOMING MOISTURE.
REST OF TODAY
SKY/WEATHER.........SUNNY (5-15 PERCENT).
CWR.................0 PERCENT.
MAX TEMPERATURE.....67-72.
MIN HUMIDITY........11-16 PERCENT.
WIND (20 FT)........NORTH WINDS 5 MPH.
SMOKE DISPERSAL.....POOR (15000 KNOT-FT) INCREASING TO FAIR IN THE
AFTERNOON.
MIXING HEIGHT.......3100 FT AGL INCREASING TO 7200 FT AGL IN THE
AFTERNOON.
TRANSPORT WINDS.....NORTH 10 MPH.
CLEARING INDEX......150 INCREASING TO 510 IN THE AFTERNOON.
CHANCE OF THUNDER...0 PERCENT.
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (50-60 PERCENT).
CWR.................0 PERCENT.
MIN TEMPERATURE.....49-54.
MAX HUMIDITY........26-31 PERCENT.
WIND (20 FT)........NORTH WINDS 5 MPH SHIFTING TO THE SOUTHEAST
OVERNIGHT.
SMOKE DISPERSAL.....POOR (0-39000 KNOT-FT).
MIXING HEIGHT.......5600 FT AGL DECREASING TO 0 FT AGL OVERNIGHT.
TRANSPORT WINDS.....NORTHEAST 10 MPH SHIFTING TO THE SOUTHEAST
OVERNIGHT.
CLEARING INDEX......390 DECREASING TO 50 OVERNIGHT.
CHANCE OF THUNDER...0 PERCENT.
FRIDAY
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT). SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
CWR.................10 PERCENT.
MAX TEMPERATURE.....65-70.
MIN HUMIDITY........22-27 PERCENT.
WIND (20 FT)........SOUTH WINDS 10 MPH. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (25000 KNOT-FT) INCREASING TO GOOD IN THE
AFTERNOON.
MIXING HEIGHT.......2100 FT AGL INCREASING TO 6900 FT AGL IN THE
AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 14 MPH.
CLEARING INDEX......250 INCREASING TO 830 IN THE AFTERNOON.
CHANCE OF THUNDER...15 PERCENT.
FORECASTER...KATHRYN ABBOTT
REQUESTED BY...JON OTT
TYPE OF REQUEST...PRESCRIBED
.TAG 2522146.0/GJT
.DELDT 09/18/25
.FORMATTERVERSION 2.0.0
.EMAIL JWOTT@BLM.GOV,TCORBIN@BLM.GOV
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