The West Fork Complex fires doubled in size Wednesday to an estimated 8,375 acres.
When the Red Flag conditions developed Wednesday afternoon, both fires in the West Fork Complex became very active.
The West Fork fire demonstrated extreme fire behavior and moved deeper into the Weminuche Wilderness. As of 6:30 p.m., the fire had not crossed the Continental Divide. This fire generated the majority of smoke that was seen Wednesday.
The Windy Pass Fire moved north up Treasure Creek and eastward to the west side of Lane Creek. This advance has the fire burning within 1/4 mile of the closest infrastructure at Wolf Creek Ski Area.
Firefighters are attempting to hold the fire south of the Continental Divide and the ski area. Additional resources for structure protection are being ordered to supplement what is already in place.
No structures have been damaged or lost. Highway 160 is still open, though visibility may be limited at times.
Nighttime wind patterns tend to pull smoke into the valleys; if this occurs, the smoke is likely to be heavier in the San Luis Valley Wednesday night and Thursday morning.
Heavy smoke was making it difficult for aircraft to accurately assess the exact perimeter of the fires.