FNUS75 KGJT 191150

FWSGJT



Spot Forecast for Derby...Grand Junction Interagency Dispatch

National Weather Service Grand Junction CO

550 AM MDT Tue Aug 19 2025



Forecast is based on forecast start time of 0600 MDT on August 19. 

If conditions become unrepresentative, contact the National Weather

Service.



.DISCUSSION...With high pressure in control, warm and dry conditions

will dominate the next few days. Winds will be generally light and 

follow typical terrain driven patterns, although gusts to around 15 

mph will be possible. Critical fire weather conditions are not 

expected at this time. Moisture begins working into the region on 

Wednesday, but will not reach the fire location until the end of the

week.



.TODAY...



Sky/weather.........Sunny (10-20 percent). 

CWR.................0 percent. 

Max temperature.....67-72. 

Min humidity........11-16 percent. 

Wind (20 ft)........Downslope/downvalley (north) winds 4-8 mph shifting to 

                    upslope/upvalley (south) winds by 1000. Shifting back to

                    downslope/downvalley (north) winds after 1600. Gusts up

                    to 15 mph possible in the afternoon. 

Smoke dispersal.....Poor (0-35000 knot-ft) increasing to fair by 1200, 

                    and to good by 1400. 

Mixing height.......0 ft AGL increasing to 10500 ft AGL by 1500.

Transport winds.....West 10 mph shifting to the northeast in the 

                    afternoon. 

Chance of thunder...0 percent. 



.TONIGHT...



Sky/weather.........Mostly clear (5-15 percent). 

CWR.................0 percent. 

Min temperature.....47-52. 

Max humidity........45-50 percent. 

Wind (20 ft)........Downslope/downvalley winds 4-8 mph shifting to the

                    southwest after 0200. Gusts up to 15 mph possible

                    through the night.

Smoke dispersal.....Fair decreasing to poor (0-7000 knot-ft) by 

                    1900. 

Mixing height.......7500 ft AGL decreasing to 0 ft AGL by 2000. 

Transport winds.....Northeast 10 mph shifting to the south 

                    overnight. 

Chance of thunder...0 percent. 



.WEDNESDAY...



Sky/weather.........Sunny (15-25 percent). 

CWR.................0 percent. 

Max temperature.....69-74. 

Min humidity........13-18 percent. 

Wind (20 ft)........Southwest winds 4-8 mph shifting to upslope/

                    upvalley (north) winds after 1000. Shifting to

                    downslope/downvalley (north) winds after 1700.

                    Gusts up to 15 mph possible through the day.

Smoke dispersal.....Poor (0-27000 knot-ft) increasing to fair by 

                    1200, and to good by 1300. Decreasing again to 

                    fair after 1700.

Mixing height.......0 ft AGL increasing to 9000 ft AGL by 1400.

Transport winds.....West 10 mph shifting to the northwest in the 

                    afternoon. 

Chance of thunder...5 percent. 



$$

Forecaster...Brianna Bealo

Requested by...Grand Junction Interagency Dispatch

Type of request...WILDFIRE

.TAG 2520207.0/GJT

.DELDT 08/19/25

.FormatterVersion 2.0.0

.EMAIL cogjc@firenet.gov,eric.hughes@usda.gov,tscott91@yahoo.com