246,160 Acres Burned. 16% Containment.

UPDATE INFORMATION 10:50AM - Today’s weather is the reverse of yesterday’s cooler, moist, and stable air mass that served to quiet the fire through last evening. For today we can expect drier air on westerly winds gusting up to 25 mph, relative humidities in the low teens to single digits, and a Haines Index of 5. These forecasted fire weather conditions and unstable air mass could approach the threshold levels of a Red Flag Warning and such a warning could be issued later today. Today’s inversion should break up around the noon hour, leading to an extended peak burning period this afternoon and early evening. Channeling of winds in the west to east aligned valleys found on the eastern fire perimeter may lead to periodic crown runs and spotting upwards of a ½ mile. If the fire moves into heavier fuels, smoke columns may build later this afternoon, leading to the movement of smoke and ash farther east on transport winds. The intense ground level smoke seen yesterday was reinforced by smoke from the McGuire Complex that further compromised air quality on the Mustang Complex. Positively, this additional smoke served to sustain yesterday’s inversion and shorten the peak burning period of our fire.

Fire activity and spread on the perimeter and interior of the Mustang Complex was relatively light yesterday; the fire footprint only grew about 4,450 acres. Based on last evening’s infrared flight, the predominant fire growth was on the eastern side of the fire perimeter. The eastern fire perimeter is now about three air miles from the Highway 93 corridor. Yesterday’s fire growth in the Sage Creek, Hull Creek, and Hughes Creek drainages was mainly a slow-moving ground fire with periodic tree torching. The fire continued to back down these drainages through most of Tuesday leading to an evening of the lowest activity seen since rain fell on the fire last week. With today’s forecast, these drainages should see more active fire behavior and growth. Firefighters are prepared to conduct defensive burnout operations around structures in these communities should the fire rapidly increase in intensity and movement. Along the northern fire perimeter, the fire was relatively quiet; defensive plans are in place for the Gattin Ranch and the Hughes Creek, Montana community. To the west, the fire continues to slowly grow into the wilderness area; however, this portion of the fire remains unstaffed due to its remoteness and inaccessibility for personnel and equipment. On the southern side of the fire, the Salmon River continues to serve as an excellent natural barrier to hold the fire from further movement south. Motorists traveling to Corn Creek should still be on the lookout for rocks and other fire debris that has rolled out onto the roadway, where fire continues to back down the mountain towards the river.

Salmon, Idaho (KMVT-TV) - As the Mustang Fire continues to burn eastward towards Highway 93, the Lemhi County Sheriff’s Department, Idaho Transportation Department, and other cooperating agencies are planning for possible traffic delays in the event the fire burns to the highway. The affected stretch of Highway 93 is that portion connecting North Fork, ID to Lost Trail Pass on the Idaho/Montana border. Travelers of this major north-south artery may experience delays for any number of reasons including active wildfire immediately adjacent to the highway, defensive burnout operations along the road shoulder, dense ground-level smoke, rock slides or roll-out of burning debris, and burning snags falling onto the road. Agencies will make a concerted effort to minimize delays by having personnel and equipment standing by to assist with fire suppression, debris clearing, and tree felling along the highway corridor. Travelers along this route should be prepared to adjust their schedules accordingly.