529
FNUS75 KGJT 150003
FWSGJT
SPOT FORECAST FOR DERBY...UPPER COLORADO FIRE MANAGEMENT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
603 PM MDT SUN SEP 14 2025
FORECAST IS BASED ON FORECAST START TIME OF 1800 MDT ON SEPTEMBER 14.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
THERE IS A VERY SLIGHT CHANCE FOR A SHOWER OR
THUNDERSTORM MONDAY AFTERNOON WITH MUCH BETTER CHANCES TUESDAY AS
A SYSTEM PASSES TO THE NORTH. THE PRIMARY THREATS WITH ANY
THUNDERSTORM ARE LIGHTNING AND GUSTS 40-50 MPH. OTHERWISE, WINDS
WILL BE LIGHT DOWNSLOPE OVERNIGHT WITH BREEZY SOUTHWEST TO WEST
WINDS EACH AFTERNOON. THERE ARE NO FIRE WEATHER CONCERNS THROUGH
THE PERIOD.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (20-30 PERCENT).
CWR.................0 PERCENT.
MIN TEMPERATURE.....35-40.
MAX HUMIDITY........59-64 PERCENT.
WIND (20 FT)........WEST WINDS 15 MPH DECREASING TO 10 MPH
OVERNIGHT.
SMOKE DISPERSAL.....FAIR DECREASING TO POOR (0 KNOT-FT) OVERNIGHT.
MIXING HEIGHT.......3700 FT AGL DECREASING TO 0 FT AGL OVERNIGHT.
TRANSPORT WINDS.....WEST 13 MPH.
CHANCE OF THUNDER...0 PERCENT.
MONDAY
SKY/WEATHER.........SUNNY (10-20 PERCENT). VERY SLIGHT CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
CWR.................0 PERCENT.
MAX TEMPERATURE.....54-59.
MIN HUMIDITY........24-29 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 10 MPH INCREASING TO 15 MPH IN
THE AFTERNOON.
SMOKE DISPERSAL.....FAIR INCREASING TO VERY GOOD IN THE AFTERNOON.
MIXING HEIGHT.......3900 FT AGL INCREASING TO 7500 FT AGL IN THE
AFTERNOON.
TRANSPORT WINDS.....WEST 17 MPH.
CHANCE OF THUNDER...5 PERCENT.
MONDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT).
CWR.................0 PERCENT.
MIN TEMPERATURE.....38-43.
MAX HUMIDITY........44-49 PERCENT.
WIND (20 FT)........WEST WINDS 15 MPH DECREASING TO 10 MPH
OVERNIGHT.
SMOKE DISPERSAL.....GOOD DECREASING TO POOR (0 KNOT-FT) OVERNIGHT.
MIXING HEIGHT.......4900 FT AGL DECREASING TO 0 FT AGL OVERNIGHT.
TRANSPORT WINDS.....WEST 13 MPH.
CHANCE OF THUNDER...0 PERCENT.
TUESDAY
SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT). SLIGHT CHANCE OF
RAIN SHOWERS IN THE MORNING, THEN CHANCE OF
SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
CWR.................10 PERCENT.
MAX TEMPERATURE.....52-57.
MIN HUMIDITY........34-39 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 10 MPH. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON.
SMOKE DISPERSAL.....GOOD INCREASING TO VERY GOOD IN THE AFTERNOON.
MIXING HEIGHT.......5300 FT AGL INCREASING TO 7900 FT AGL IN THE
AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 17 MPH.
CHANCE OF THUNDER...25 PERCENT.
FORECAST DAYS 3 THROUGH 5
WEDNESDAY
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS IN THE
MID 30S. HIGHS IN THE UPPER 40S. NORTH WINDS 10 MPH.
THURSDAY
MOSTLY CLEAR. LOWS IN THE MID 30S. HIGHS IN THE MID 50S. NORTH
WINDS 10 MPH.
FRIDAY
MOSTLY CLEAR. LOWS IN THE UPPER 30S. HIGHS IN THE UPPER 50S. WEST
WINDS 5 MPH.
FORECASTER...DAVID BYERS
REQUESTED BY...BRIAN OKARSKI
TYPE OF REQUEST...WILDFIRE
.TAG 2521931.1/GJT
.DELDT 09/14/25
.FORMATTERVERSION 2.0.0
.EMAIL BOKARSKI@BLM.GOV,MPFEIFER@BLM.GOV
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