FNUS75 KGJT 201212

FWSGJT



Spot Forecast for South Rim...NPS

National Weather Service Grand Junction CO

612 AM MDT Wed Aug 20 2025



Forecast is based on forecast start time of 0700 MDT on August 20. 

If conditions become unrepresentative, contact the National Weather

Service.



.DISCUSSION...Hot and dry conditions continue as high pressure remains

in control. Minimum humidities will be in the low teens to single 

digits, with near record afternoon highs. Winds will remain light and

terrain driven, however, keeping critical fire weather conditions 

highly localized if they occur at all. These conditions will continue

through the end of the week, with increasing moisture, cooler 

temperatures and chances for wetting rain coming this weekend



.TODAY...



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

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

Max temperature.....84-89. 

Min humidity........8-13 percent. 

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

                    1100, and to the northwest by 1400. Gusts up to 

                    15 mph in the afternoon.

Smoke dispersal.....Poor (0-25000 knot-ft) increasing to fair by 

                    1200, and to good by 1400.

Mixing height.......0 ft AGL increasing to 11600 ft AGL by 1500.

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

                    afternoon. 

Chance of thunder...5 percent. 



.TONIGHT...



Sky/weather.........Mostly clear (10-20 percent). 

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

Min temperature.....57-62. 

Max humidity........41-46 percent. 

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

                    southeast by 2100. Gusts up to 15 mph through

                    the night.

Smoke dispersal.....Good decreasing to poor (0-23000 knot-ft) by 

                    1900. 

Mixing height.......9700 ft AGL decreasing to 0 ft AGL by 2000. 

Transport winds.....West 12 mph shifting to the east 13 mph 

                    overnight. 

Chance of thunder...0 percent. 



.THURSDAY...



Sky/weather.........Sunny (5-15 percent). 

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

Max temperature.....85-90. 

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

                    after 1200.

Smoke dispersal.....Poor (0-29000 knot-ft) increasing to fair by 

                    1200, and to good by 1300. Decreasing again to 

                    fair by 1700.

Mixing height.......0 ft AGL increasing to 12200 ft AGL by 1500.

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

                    the afternoon. 

Chance of thunder...5 percent. 



$$

Forecaster...Brianna Bealo

Requested by...Montana Masden

Type of request...WILDFIRE

.TAG 2519976.4/GJT

.DELDT 08/20/25

.FormatterVersion 2.0.0

.EMAIL Montana.Masden@usda.gov