FNUS75 KGJT 202155 FWSGJT Spot Forecast for Swiss Roll Wildfire...USDA National Weather Service Grand Junction CO 355 PM MDT Sun Sep 20 2026 Forecast is based on forecast start time of 1800 MDT on September 20. If conditions become unrepresentative, contact the National Weather Service. .DISCUSSION...Dry weather continues through Monday. RH tomorrow afternoon will dip as low as the high teens/low 20s before rebounding on Tuesday with moisture returning to the region. As a result, look for an uptick in stormy weather Tuesday and beyond. .TONIGHT... Sky/weather.........Mostly clear (15-25 percent). CWR.................0 percent. Min temperature.....36-41. Max humidity........43-48 percent. Wind (20 ft)........South winds 10-15 mph shifting to the east 5-10 mph overnight. Smoke dispersal.....Fair decreasing to poor (5000 knot-ft) overnight. Mixing height.......4500 ft AGL decreasing to 600 ft AGL overnight. Transport winds.....Southwest 15 mph shifting to the east 10 mph overnight. Chance of thunder...0 percent. .MONDAY... Sky/weather.........Mostly sunny (25-35 percent). CWR.................0 percent. Max temperature.....56-61. Min humidity........19-24 percent. Wind (20 ft)........South winds 5-10 mph shifting to the southwest in the afternoon. Smoke dispersal.....Good. Mixing height.......5900 ft AGL. Transport winds.....Southeast 10 mph shifting to the southwest 14 mph in the afternoon. Chance of thunder...0 percent. .MONDAY NIGHT... Sky/weather.........Partly cloudy (35-45 percent). CWR.................0 percent. Min temperature.....38-43. Max humidity........48-53 percent. Wind (20 ft)........South winds 5-10 mph shifting to the southeast overnight. Smoke dispersal.....Poor (4000-29000 knot-ft). Mixing height.......2900 ft AGL decreasing to 600 ft AGL overnight. Transport winds.....South 10 mph. Chance of thunder...0 percent. .TUESDAY... Sky/weather.........Partly sunny (60-70 percent). Chance of rain showers in the morning, then rain showers likely and chance of thunderstorms in the afternoon. CWR.................40 percent. Max temperature.....53-58. Min humidity........43-48 percent. Wind (20 ft)........South winds 8-12 mph. Gusty and erratic winds expected near thunderstorms in the afternoon. Smoke dispersal.....Good. Mixing height.......5200 ft AGL. Transport winds.....Southwest 13 mph. Chance of thunder...40 percent. $$ Forecaster...Kathryn Abbott Requested by...Cameron Castle Type of request...WILDFIRE .TAG 2621670.18/GJT .DELDT 09/20/26 .FormatterVersion 2.0.0 .EMAIL ccastle@elkcreekfire.org,thadmckain@gmail.com