Thunderstorms and Heavy Rains in the Appalachians

Multiple rounds of moderate to locally heavy rain will impact portions of the Appalachians and Mid-Atlantic, which may lead to flash flooding concerns. Thunderstorms with isolated severe wind gusts will be possible this afternoon from parts of the Southeast into the southern and central Appalachians. A multi-day heavy rain will pose a flash flood threat in New Mexico beginning Tuesday. Read More >

Click a location below for detailed forecast.

Last Map Update: Mon, Sep 21, 2026 at 1:24:31 pm MDT

Watches, Warnings & Advisories

National Weather Service Grand Junction, CO

National Weather Service NWS Flagstaff, AZ

Zoom Out

National Weather Service NWS Tucson Arizona

Severe Thunderstorm Warning

Flood Watch

Hazardous Weather Outlook

Heavy Rain Tue - Thu

Flood Risk Tuesday & Wednesday

Flood Risk Thursday

Temperature & Precip Outlook

A 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 dangerous surge of monsoon moisture will increase the risk of flash flooding, as well as river and tributary flooding, Tuesday afternoon through Wednesday night.

Heavy rain will continue Thursday and Thursday night in many locations. The greatest risk of excessive rainfall that could produce flash flooding will be along and east of the central mountain chain.

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.