National Weather Service United States Department of Commerce

Severe Thunderstorm and Tropical Storm Bertha Impacts

Numerous severe thunderstorms are expected across a broad region from the Ohio Valley to the Mid-Atlantic and Northeast States today into tonight. Swaths of damaging wind gusts are expected and some tornadoes are possible. Bertha is expected to bring tropical storm conditions to portions of the Gulf Coast from the Florida Panhandle westward to southeastern Louisiana later today and Wednesday. Read More >

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Last Map Update: Tue, Jul 21, 2026 at 2:52:38 pm MDT

A significant surge of monsoon moisture will bring scattered to widespread showers and thunderstorms to Western Montana and North Central Idaho from Tuesday through Thursday. These are expected to be wet, bringing a potential for heavy rain and localized flash flooding, especially on Wednesday and Thursday. The main threats during the afternoon and evening hours will include frequent lightning, gusty and erratic winds, heavy rain, and small hail. To prepare, ensure you have a reliable way to receive weather warnings, such as a NOAA Weather Radio or a trusted weather app on your phone. If you are recreating outdoors, be prepared to alter your plans by getting off the water and away from mountain peaks before storms arrive. Finally, take a moment to secure loose patio furniture or outdoor decor, as high winds can easily blow these items around. Stay weather aware this week and visit weather.gov/mso for the latest updates. Temperatures are expected to rise into the 90s and just above 100 degrees in the lower elevations of Idaho. To mitigate the risks associated with these hot temperatures, individuals should stay hydrated, limit strenuous outdoor activities during peak afternoon heating, and spend time in air-conditioned or shaded environments.

 

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