Areas of moderate to heavy smoke have been observed Monday morning across portions of central and western Colorado due to the Pine Gulch and Grizzly Creek wildfires. Smoke will gradually diminish Monday morning as atmospheric mixing increases, with the slowest improvement occurring in valley locations.
By Monday afternoon, the wind at the fires will initially be out of a westerly direction but will shift clockwise to the northeast by Monday evening. This could bring periods of moderate to heavy smoke for areas to the east, southeast, south, and southwest of both wildfires. By late Monday evening, smoke will begin to drain into lower-lying areas surrounding both fires. This will bring longer duration, heavy smoke through early Tuesday morning to several drainages near the Pine Gulch wildfire including into the De Beque and Grand Junction areas. Meanwhile, heavy overnight smoke from the Grizzly Creek wildfire will continue to impact locations along Interstate 70 in central and eastern Garfield County.
If smoke is thick or becomes thick in your neighborhood you may want to remain indoors. This is especially true for those with heart disease, respiratory illnesses, the very young, and the elderly. Consider limiting outdoor activity when moderate to heavy smoke is present. Consider relocating temporarily if smoke is present indoors and is making you ill. If visibility is less than 5 miles in smoke in your neighborhood, smoke has reached levels that are unhealthy.
The Pine Gulch and Grizzly Creek Fires have created smoke outlook pages that will be updated throughout the incident.
–Pine Gulch: https://fires.airfire.org/outlooks/WesternColorado