Flooding Possible in the Southwest U.S.; Coastal Storm to Impact the East

Heavy to excessive rainfall is expected today into Wednesday over New Mexico into far west Texas. Flash flooding and debris flows in wildfire burn areas will be possible. A strong coastal storm will develop off the Mid-Atlantic coast Wednesday, intensifying toward southern New England this weekend. Significant coastal flooding, strong rip currents, and beach erosion from high surf expected. Read More >

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Last Map Update: Tue, Sep 22, 2026 at 4:18:07 pm MDT

Watches, Warnings & Advisories

National Weather Service Grand Junction, CO

National Weather Service NWS Flagstaff, AZ

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National Weather Service NWS Tucson Arizona

Flash Flood Warning

Flood Advisory

Flood Watch

Special Weather Statement

Hazardous Weather Outlook

Heavy Rain & Flash Flooding Overview

Excessive Rainfall Outlook

Flash Flood Safety

Temperature & Precip Outlook

A significant, and potentially dangerous, surge of monsoon moisture will cross today through Thursday night with widespread showers and thunderstorms, many with heavy rainfall and some with flash flooding.

A powerful surge of monsoon moisture will lead to numerous showers and thunderstorms, many of which will produce heavy rainfall. These maps show the risk of excessive rainfall leading to flash flooding.

Small Decisions can have a big impact: Flooding. 1) Turn around and don't drive through a flooded roadway. 2) Don't drive around barricades. 3) Delay travel until conditions improve. Don't let a bad decision be your last.

Monsoon surge with heaviest rain through Thursday night. More localized heavy rain lingering into Friday. Cool for the remainder of the work week, then warmer this weekend.