Today will be another hot day, just like Monday. Yesterday's afternoon highs were in the 90s, and today will be fairly similar.\
Isolated thunderstorms will move into southwestern Montana this afternoon and evening. The hi-line will also see some thunderstorm activity this evening, especially in northeastern Montana. North-central Montana, including Great Falls and Helena, will stay dry today. More widespread thunderstorms are expected later this week, when the persistent high pressure over the western United States breaks down.
Air quality so far today has not been great, hovering between Good and Moderate in central Montana. This will likely be the case for the rest of this week, until the high pressure over Montana moves out. Low-pressure, bringing widespread thunderstorms, will bring more lasting improvements to our air quality.