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Thunderstorms and Heavy Rainfall in the Southeast, Montana, and Iowa; Lowell Begins to Impact Hawaii

Strong thunderstorms with damaging winds and heavy rain are expected across portions of the Southeast. Thunderstorms may produce large hail across portions of Montana. Heavy rainfall could produce flash flooding across Iowa and vulnerable areas in Utah. Lowell will bring heavy rain, dangerous swells and rip currents to portions of Hawaii. Sweltering heat persists across the South-Central US. Read More >

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Last Map Update: Sun, Sep 6, 2026 at 11:46:37 am PDT

There a chance (20-40%) of thunderstorms across Eastern Washington and North Idaho on Sunday. These storms will be capable of gusty outflow winds, cloud to ground lightning, heavy rain, and small hail.
There is a marginal risk for heavy rain on Sunday into Monday in the green shaded area which includes the ID Panhandle and portions of extreme Eastern Washington. Potential impacts include debris flows near burn scars and steep terrain, rockslides, and rises on small creek and streams.

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