The fire was very active throughout the night on the north flank due to a thermal belt heating cold air flowing down the mountainous terrain. Earlier today crews experienced 15 to 20 mph winds as they worked in the difficult terrain at an elevation of 4,500 feet above sea level. Temperatures today will be hot and dry with southwest winds.
Almost 300 fire fighters are on scene fighting the fire that has now grown to 620 acres, with five hotshot crews and five helicopters assigned to the fire. The fire is fully staffed and Rosenthal's Type 2 Incident Management Team has been briefed and will assume management of the fire on Friday.
"Currently, we've established a solid anchor point for fire crews to work from as they continue to build a containment line," said Bobby Shindelar, fire and aviation staff officer for the Boise National Forest. "We're making strong efforts to contain the fire and with more resources, hopefully we'll continue to make good progress."
Smoke was very visible from Idaho City, Centerville and Pioneerville late yesterday, but the fire is headed north away from these communities. At this time, there are no structures in imminent danger. The cause of the fire is being investigated.