Unsettled Weather in the Eastern U.S. through Memorial Day

Showers and thunderstorms are expected from Texas to the Northeast through Tuesday. Heavy rain will create mainly localized areas of flash flooding across the central Gulf Coast into the Appalachians. Elevated to Critical fire weather conditions due to gusty winds and low humidity are expected through Tuesday across Oregon and Nevada. Showers and thunderstorms will develop over the Northwest. Read More >

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Last Map Update: Sun, May 24, 2026 at 11:14:21 pm MDT

Watches, Warnings & Advisories

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National Weather Service Great Falls, MT

Hydrologic Outlook

Memorial Day Weekend Weather Outlook

Unsettled Weather and Thunderstorms Tues-Fri

Heading outdoors for Memorial Day Weekend? 🏕️🚤 We're looking at a split-weather setup for north central Idaho and western Montana. Saturday and Sunday will be warm and dry with overall great weather to get outside! But we need to stress that our rivers and lakes are running extremely COLD and FAST right now. Cold water shock is a deadly hazard, and absolutely no one is immune to it. Please, wear your life jacket if you are anywhere near the water! 🦺 By Monday afternoon, the pattern shifts. We are tracking an increased threat for scattered thunderstorms. If you are wrapping up a camping trip, hiking, or grilling out, keep an eye on the sky. Be prepared to seek shelter from lightning and sudden, gusty outflow winds over 40 mph. Have a safe holiday weekend!

A prolonged period of unsettled weather will impact the Northern Rockies starting Tuesday, May 26, and continuing through Friday, May 29. Periods of widespread rain (amounts greater than 0.25") are most likely from Monday night into Tuesday night, with a 50-70% chance of occurrence. As the week progresses, the threat of scattered thunderstorms will increase from Wednesday onward. Primary storm threats include heavy rain, lightning, and minor flooding in areas with poor drainage.

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Unsettled Weather in the Eastern U.S. through Memorial Day

NWS Forecast Office Missoula, MT