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

Extreme Heat Warning issued July 10 at 1:59AM MDT until July 13 at 9:00PM MDT by NWS Riverton WY

Effective: Fri July 10, 2026, 1:59 AM
Expires: Fri July 10, 2026, 5:30 PM

* WHAT...Dangerously hot conditions with temperatures 100 to 110 degrees below 6,000 feet and 90 to 100 degrees between 6,000 and 7,500 feet each day. * WHERE...Portions of central, north central, northwest, south central, southwest, and west central Wyoming. * WHEN...From noon Saturday to 9 PM MDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Extreme Heat Warning issued July 10 at 9:32AM MDT until July 13 at 9:00PM MDT by NWS Riverton WY

Effective: Fri July 10, 2026, 9:32 AM
Expires: Sat July 11, 2026, 7:00 AM

* WHAT...Dangerously hot conditions with temperatures 100 to 110 degrees below 6,000 feet and 90 to 100 degrees between 6,000 and 7,500 feet each day. * WHERE...Portions of central, north central, northwest, south central, southwest, and west central Wyoming. * WHEN...From noon Saturday to 9 PM MDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Fire Weather Watch issued July 10 at 11:09AM MDT until July 12 at 9:00PM MDT by NWS Billings MT

Effective: Fri July 10, 2026, 11:09 AM
Expires: Sat July 11, 2026, 11:15 AM

* IMPACTS: Low humidities, very hot temperatures, strong gusty winds may create erratic fire behavior. * AFFECTED AREA: In North Central WY Fire Zone...274. In South Central MT Fire Zones...124...125...126...127...128 129. In Southeast MT Fire Zones...130...131...132. In Southeast MT and Northwest SD Fire Zone...133. * COUNTIES AFFECTED: In Central MT...Golden Valley...Musselshell...Wheatland. In North Central WY...Sheridan. In Northwest SD...Harding. In South Central MT...Big Horn...Carbon...Park...Stillwater Sweet Grass...Yellowstone. In Southeast MT...Carter...Custer...Fallon...Powder River Rosebud...Treasure. * WIND: South 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 7 percent. * TEMPERATURES: Up to 112.

A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.

Fire Weather Watch issued July 10 at 10:27AM MDT until July 12 at 9:00PM MDT by NWS Billings MT

Effective: Fri July 10, 2026, 10:27 AM
Expires: Sat July 11, 2026, 10:30 AM

The National Weather Service in Billings has issued a Fire Weather Watch...which is in effect from Sunday morning through Sunday evening. * IMPACTS: Low humidities, very hot temperatures, and strong gusty winds will create erratic fire behavior and new fire starts. * AFFECTED AREA: In North Central WY Fire Zone...274. In South Central MT Fire Zones...124...125...126...127...128 129. In Southeast MT Fire Zones...130...131...132. In Southeast MT and Northwest SD Fire Zone...133. * COUNTIES AFFECTED: In Central MT...Golden Valley...Musselshell...Wheatland. In North Central WY...Sheridan. In Northwest SD...Harding. In South Central MT...Big Horn...Carbon...Park...Stillwater Sweet Grass...Yellowstone. In Southeast MT...Carter...Custer...Fallon...Powder River Rosebud...Treasure. * WIND: South 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 7 percent. * TEMPERATURES: Up to 112.

A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.