FNUS75 KGJT 211010

FWSGJT



Spot Forecast for Swiss Roll Wildfire...USDA

National Weather Service Grand Junction CO

410 AM MDT Mon Sep 21 2026



Forecast is based on forecast start time of 0600 MDT on September 21. 

If conditions become unrepresentative, contact the National Weather

Service.



.DISCUSSION...



Monday will see relatively dry conditions with afternoon RH in 

the low 20's. Afternoon winds will be southwesterly and around 10 

mph. Moisture will begin moving into the region overnight, 

bringing about more active weather. Light showers could begin 

anytime after 0300 MDT on Tuesday, though the highest potential 

for rain will come after 0900 MDT. This active pattern is expected

to continue through the week.



.TODAY...



Sky/weather.........Sunny (5-15 percent) in the morning then

                    becoming partly sunny (55-65 percent) in the

                    afternoon. 

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

Max temperature.....56-61. 

Min humidity........19-24 percent. 

Wind (20 ft)........South winds 3-5 mph near sunrise becoming

                    southwest by 1000 MDT and increasing to 8-12

                    mph by 1300 MDT.

Smoke dispersal.....Good. 

Mixing height.......6000 ft AGL. 

Transport winds.....Southwest 12 mph. 

Chance of thunder...0 percent. 



.TONIGHT...



Sky/weather.........Mostly cloudy (65-75 percent) then becoming 

                    partly cloudy (45-55 percent). Slight chance of 

                    rain showers after 0300 MDT.

CWR.................10 percent. 

Min temperature.....38-43. 

Max humidity........50-55 percent. 

Wind (20 ft)........Downslope/downvalley winds 3-6 mph. 

Smoke dispersal.....Poor (4000-25000 knot-ft). 

Mixing height.......2700 ft AGL decreasing to 600 ft AGL overnight. 

Transport winds.....South 8 mph. 

Chance of thunder...0 percent. 



.TUESDAY...



Sky/weather.........Mostly cloudy (75-85 percent). Chance of rain

                    shower in the morning, then rain showers and

                    chance of thunderstorms in the afternoon.

CWR.................55 percent. 

Max temperature.....53-58. 

Min humidity........40-45 percent. 

Wind (20 ft)........Southwest winds 8-12 mph. Gusty and erratic winds 

                    expected near thunderstorms.

Smoke dispersal.....Very good. 

Mixing height.......5100 ft AGL increasing to 7300 ft AGL in the 

                    afternoon. 

Transport winds.....Southwest 16 mph. 

Chance of thunder...40 percent. 



$$

Forecaster...Braeden Winters

Requested by...Cameron Castle

Type of request...WILDFIRE

.TAG 2621670.19/GJT

.DELDT 09/21/26

.FormatterVersion 2.0.0

.EMAIL thadmckain@gmail.com,ccastle@elkcreekfire.org