Heavy Rainfall and Flooding in the Southwest and Along the East Coast

A multi-day heavy rainfall event is set to begin across New Mexico into west Texas Tuesday through Wednesday. Flash flooding and debris flows in the vicinity of burn scars will also be possible. A strong coastal low will develop offshore of the Mid-Atlantic coast midweek, bringing heavy rainfall, strong winds and coastal flooding to much of the East Coast through Friday. Read More >

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Last Map Update: Mon, Sep 21, 2026 at 9:48:06 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

Flood Watch

Hazardous Weather Outlook

Heavy Rain & Flash Flooding

Excessive Rainfall Outlook

Small Decisions, Big Impact

Temperature & Precip Outlook

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

A late surge in 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.

High temps below average for this time of year, especially during the work week. Monsoon surge with heaviest rain Tuesday through Thursday. More localized heavy rain lingering into Friday.