A Red Flag Warning has been issued for the Salmon, Challis, and Sawtooth National Forests. Today's thunderstorms will produce 45 mph winds gust which could create rapid fire growth.
A Dense Fog Advisory has been issued for southern Gallatin County, including West Yellowstone. Visibility will be reduced to a quarter of a mile at times.
High pressure remains in control of our weather this week. Partly to mostly sunny skies and warm to hot temperatures will continue. Monsoon moisture will bring a chance of isolated afternoon showers and storms, mainly to southwest Montana today. Butte will have the best chance of thunderstorms this afternoon. Some of the these storms may produce brief heavy rain, but the main concern will be lightning. The thunder threat is small for areas north of I-90. However, isolated thunder is possible for Missoula and Kalispell through the end of the week. High temperatures will be in the the upper 80s and 90s in Missoula and Kalispell, with the 80s for Butte and Bozeman.
This weather pattern will continue through the weekend and into next week.