Wildfire smoke was almost bearable in some western Montana communities yesterday, but that's about to change.
The Missoula City-County Health Department says winds that have kept the smoke at bay for the past 24 hours or so are expected to shift to the west today. That could blow lots more smoke to the east.
In other words, there's a massive amount of smoke just over the mountains in Idaho and it's headed into Montana. That means air quality is going to quickly deteriorate.