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 8:34:22 pm EDT

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There are no watches, warnings, or advisories at this time.

Summer Humidity

Increased moisture across the area will encourage elevated shower and thunderstorm chances through the beginning of the week, including the Labor Day holiday. Primary threats related to stronger thunderstorms will be dangerous lightning strikes. However, heat illness is also a concern as heat index values will approach the mid 100s daily. Little relief overnight will take place due to the muggy conditions. Know the signs of heat stress and stay hydrated. For more heat safety information, head to www.weather.gov/safety/heat Get the latest weather conditions before heading out. Have a plan if caught outside when a thunderstorm occurs. Boaters should use extra caution when thunderstorm conditions exist and have a plan of escape.

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

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