613
FNUS75 KGJT 162139
FWSGJT
SPOT FORECAST FOR DERBY...UPPER COLORADO FIRE MANAGEMENT
NATIONAL WEATHER SERVICE GRAND JUNCTION CO
339 PM MDT TUE SEP 16 2025
FORECAST IS BASED ON FORECAST START TIME OF 1814 MDT ON SEPTEMBER 16.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
SCATTERED SHOWERS AND STORMS CONTINUE THROUGH THE
OVERNIGHT HOURS AS A FRONT MOVES THROUGH. A DRY PERIOD IS EXPECTED
TOMORROW MORNING BEFORE ISOLATED TO SCATTERED SHOWERS AND STORMS
DEVELOP ALONG THE DIVIDE TOMORROW AFTERNOON. COVERAGE WILL BE LESS
THAN WHAT WE'RE SEEING TODAY. THURSDAY WILL BE A TRANSITION DAY
WITH MUCH DRIER AIR EXPECTED ON FRIDAY.
REST OF TODAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). NUMEROUS RAIN
SHOWERS AND SCATTERED THUNDERSTORMS.
CWR.................20 PERCENT.
MAX HUMIDITY........72-77 PERCENT.
WIND (20 FT)........WEST WINDS 8-12 MPH. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS.
SMOKE DISPERSAL.....FAIR.
MIXING HEIGHT.......3900 FT AGL.
TRANSPORT WINDS.....WEST 15 MPH.
CLEARING INDEX......860.
CHANCE OF THUNDER...30 PERCENT.
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT) THEN BECOMING
MOSTLY CLEAR (20-30 PERCENT). NUMEROUS RAIN
SHOWERS AND SCATTERED THUNDERSTORMS IN THE
EVENING.
CWR.................20 PERCENT.
MIN TEMPERATURE.....33-38.
MAX HUMIDITY........72-77 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 5-10 MPH. GUSTY AND ERRATIC
WINDS EXPECTED NEAR THUNDERSTORMS IN THE
EVENING.
SMOKE DISPERSAL.....FAIR DECREASING TO POOR (0 KNOT-FT) OVERNIGHT.
MIXING HEIGHT.......3900 FT AGL DECREASING TO 0 FT AGL OVERNIGHT.
TRANSPORT WINDS.....NORTHWEST 11 MPH.
CLEARING INDEX......860 DECREASING TO 50 OVERNIGHT.
CHANCE OF THUNDER...30 PERCENT.
WEDNESDAY
SKY/WEATHER.........SUNNY (20-30 PERCENT) THEN BECOMING PARTLY
SUNNY (60-70 PERCENT). ISOLATED SNOW SHOWERS IN
THE MORNING. SCATTERED RAIN SHOWERS THROUGH THE
DAY. SCATTERED SHOWERS AND ISOLATED
THUNDERSTORMS IN THE AFTERNOON.
CWR.................10 PERCENT.
MAX TEMPERATURE.....47-52.
MIN HUMIDITY........40-45 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 10 MPH. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (21000 KNOT-FT) INCREASING TO FAIR IN THE
AFTERNOON.
MIXING HEIGHT.......3500 FT AGL INCREASING TO 6500 FT AGL IN THE
AFTERNOON.
TRANSPORT WINDS.....WEST 10 MPH.
CLEARING INDEX......210 INCREASING TO 590 IN THE AFTERNOON.
CHANCE OF THUNDER...20 PERCENT.
FORECASTER...KATHRYN ABBOTT
REQUESTED BY...BRIAN OKARSKI
TYPE OF REQUEST...WILDFIRE
.TAG 2521931.3/GJT
.DELDT 09/16/25
.FORMATTERVERSION 2.0.0
.EMAIL MPFEIFER@BLM.GOV,BOKARSKI@BLM.GOV
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