Northwest Montana Fire and Aviation
In depth information on fire and aviation in Libby, Montana.
Issued on 7/7/26 at 5:40 PM
Fire Weather Discussion as of 6:40 p.m. MDT Tuesday, July 7, 2026
The next 24 hours or so have the potential to be very impactful across the region. An approaching shortwave will generate some elevated instability which has been consistently shown in some models to produce isolated to scattered high based, elevated forced convection. This convection, should it occur will develop rapidly with high cloud bases near 12,000 feet above sea level and will move along fairly quickly with narrow precipitation cores, gusty, erratic winds and lightning strikes outside of precipitation cores. Once this convection shifts out of the region by noon on Wednesday, a breezy to windy, hot and dry day will follow with low humidity values with minimum values of 15-20% likely Wednesday afternoon during peak daytime heating. Winds will pick up from the south and southwest at 15 to 25 mph with gusts to 30 mph through favored canyons and along portions of Lake Koocanusa with ridge top gusts up to 40 mph. While no fire weather watches or red flag warnings have been issued for our region fire personnel should be prepared for the potential for ignitions and possible rapid spread due to the gusty winds with convection followed by steadier winds due to tightening pressure gradients in the afternoon.
Aviation discussion as of 6:40 p.m. MDT Tuesday, July 7, 2026 valid through 10:00 p.m. MDT Wednesday, July 8, 2026:
VFR conditions will persist through the period. Overnight into Wednesday morning anticipate a rapid development of ACCAS clouds with bases near 12,000 feet ASL with some of these maturing into showers and thunderstorms with tops near 30,000 feet. Narrow precipitation cores could briefly limit visibility to MVFR levels directly beneath the heaviest cores with gusty winds and lightning strikes the biggest threats from these cells. Clouds and showers will move out of the region by lunchtime with breezy south to southwest winds picking up at the airfield in the 15 to 25 mph range. Ridge top winds will be stronger up to 40 mph.