FNUS75 KGJT 191215

FWSGJT



Spot Forecast for South Rim...NPS

National Weather Service Grand Junction CO

615 AM MDT Tue Aug 19 2025



Forecast is based on forecast start time of 0700 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. Minimum humidities will be in the 

single digits to low teens, although light winds will limit critical

fire weather concerns. Winds will follow typical terrain driven patterns,

with afternoon gusts struggling to reach 20 mph. Moisture will begin

to increase on Wednesday, with a slight chance of showers and 

thunderstorms near the fire location that afternoon. Chances of wetting

rain do not improve until late in the week.



.TODAY...



Sky/weather.........Sunny (0-10 percent). 

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

Max temperature.....84-89. 

Min humidity........4-9 percent. 

Wind (20 ft)........Southeast winds 4-8 mph shifting to the southwest

                    by 1100, then to the northwest by 1300. Gusts up 

                    to 15 mph possible in the afternoon.

Smoke dispersal.....Poor (0-31000 knot-ft) increasing to fair by 

                    1200, and to good by 1400.

Mixing height.......0 ft AGL increasing to 11900 ft AGL by 1500.

Transport winds.....Southeast 12 mph shifting to the northwest 10 

                    mph in the afternoon. 

Chance of thunder...0 percent. 



.TONIGHT...



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

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

Min temperature.....56-61. 

Max humidity........47-52 percent. 

Wind (20 ft)........Northwest winds 4-8 mph, becoming southeast

                    winds 8-12 mph after 2100. Gusts up to 20 mph

                    possible before 2400.

Smoke dispersal.....Fair decreasing to poor (0-14000 knot-ft) by 

                    1900. 

Mixing height.......9900 ft AGL decreasing to 0 ft AGL by 2000. 

Transport winds.....Northeast 15 mph shifting to the east 17 mph 

                    overnight. 

Chance of thunder...0 percent. 



.WEDNESDAY...



Sky/weather.........Sunny (10-20 percent). Slight chance of showers

                    and thunderstorms in the afternoon.

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

Max temperature.....83-88. 

Min humidity........9-14 percent. 

Wind (20 ft)........Southeast winds 4-8 mph shifting to the 

                    northwest by 1200. Gusts up to 15 mph possible

                    in the afternoon. Gusty and erratic winds

                    expected near thunderstorms in the afternoon. 

Smoke dispersal.....Poor (0-39000 knot-ft) increasing to fair by 

                    1300, and to good by 1700.

Mixing height.......0 ft AGL increasing to 11100 ft AGL by 1600.

Transport winds.....Southeast 12 mph shifting to the northwest in 

                    the afternoon. 

Chance of thunder...10 percent. 



$$

Forecaster...Brianna Bealo

Requested by...Montana Masden

Type of request...WILDFIRE

.TAG 2519976.3/GJT

.DELDT 08/19/25

.FormatterVersion 2.0.0

.EMAIL Montana.Masden@usda.gov