Station Name: Boiling River at Mammoth,YNP
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 5,686 feet

Nearest Address:
N Entrance Rd
Yellowstone National Park, WY 82190
Park County

GPS Coordinates: 44.9851333, -110.6893444

Nearby Water Temperatures

Flash Flood Watch issued May 29 at 11:04AM MDT until May 31 at 12:00AM MDT by NWS Billings MT

Effective: Fri May 29, 2026, 11:04 AM
Expires: Sat May 30, 2026, 11:15 AM

* WHAT...Flash flooding and debris flows caused by excessive rainfall are possible over the Elk, Robertson Draw, and East Side Burn Areas on Saturday. * WHERE...Portions of south central Montana, including the following areas, Absaroka/Beartooth Mountains and Red Lodge Foothills and north central Wyoming, including the following area, Northeast Bighorn Mountains. * WHEN...From Saturday morning through Saturday evening. * IMPACTS...Periods of heavy rainfall with embedded thunderstorms are expected over the Elk, Robertson Draw, and East Side Burn Areas Saturday, possibly beginning early in the morning. Residents in and downstream of these burn scars should prepare for potential rapid runoff, flooding and debris flows. Narrow drainages and low-lying areas are especially prone to flood. Be sure to stay up to date with information from local authorities. * ADDITIONAL DETAILS... - Periods of heavy rainfall with embedded thunderstorms are expected across the region. The Elk Burn Area along the eastern slopes of the Bighorns, and the Robertson Draw and East Side Burn Areas south of Red Lodge, could experience flash flooding and debris flows. Stay alert! - http://www.weather.gov/safety/flood

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

Flash Flood Watch issued May 30 at 12:49AM MDT until May 31 at 12:00AM MDT by NWS Billings MT

Effective: Sat May 30, 2026, 12:49 AM
Expires: Sun May 31, 2026, 12:00 AM

* WHAT...Flash flooding and debris flows caused by excessive rainfall are possible over the Elk, Robertson Draw, and East Side burn areas. * WHERE...Portions of south central Montana, including the following areas, Absaroka/Beartooth Mountains and Red Lodge Foothills, and north central Wyoming, including the following areas, Northeast Bighorn Mountains and Sheridan Foothills. * WHEN...From 6 AM MDT this morning through this evening. * IMPACTS...Periods of heavy rainfall with embedded thunderstorms are expected over the Elk, Robertson Draw, and East Side burn areas. Residents in and downstream of these burn areas should be prepared for potential rapid runoff, flooding, and debris flows. Narrow drainages and low-lying areas are especially prone to flooding. * ADDITIONAL DETAILS... - Periods of heavy rainfall with embedded thunderstorms are expected across the region. The Elk burn area along the eastern slopes of the Bighorn Mountains, and the Robertson Draw and East Side burn areas south of Red Lodge, could experience flash flooding and debris flows. Stay alert! - http://www.weather.gov/safety/flood

Continue to monitor the latest forecast and be prepared to take action should a Flash Flood Warning be issued.