Severe Thunderstorms and Heavy Rain Across the Ohio Valley;

Severe thunderstorms with damaging wind gusts will be possible from the mid-Mississippi Valley into parts of the Ohio Valley and central Appalachians. Heavy rain associated with these storms may lead to considerable flash and urban flooding impacts across portions of the Ohio Valley. Mid-summer heat persists from the Central Plains to the Southeast. Read More >

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Last Map Update: Tue, Aug 11, 2026 at 1:34:50 pm MDT

Watches, Warnings & Advisories

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National Weather Service Great Falls, MT

Red Flag Warning

Fire Weather Watch

Air Quality Alert

Extensive Wildfire Smoke and Visibility Impacts

Wildfire Evacuation Preparation Strategies

Thunderstorms - Wednesday Evening

🚨 DEGRADED AIR QUALITY 🚨 🌫️ Current wildfire smoke is severely degrading air quality throughout Western Montana and North-Central Idaho, with no significant relief expected in the near term. Visibility may also be periodically reduced by the smoke, which could impact aviation operations ✈️. Please take precautions for your health: 🛑 Limit strenuous outdoor activity. 😷 Consider wearing an N95 mask if you must go out. 🏠 When indoors, keep windows closed and utilize air conditioning and filtration systems. 📍 Track your local air quality at fire.airnow.gov ℹ️ Local Resources: Idaho: deq.idaho.gov/air-quality Montana: deq.mt.gov/air

During wildfire season, especially, it is critical that all residents familiarize themselves with the "Ready, Set, Go" protocol. Beyond having your go-kit packed (including supplies for your pets), there are immediate tactical steps you can take if fire is nearby: Park your vehicle facing the road for a rapid exit, and turn off all exterior sprinklers to ensure local fire crews have maximum water pressure. Monitor updates from your local county emergency management officials. If you feel unsafe, do not wait for an official order to leave.

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Severe Thunderstorms and Heavy Rain Across the Ohio Valley;

NWS Forecast Office Missoula, MT