Station Name: Firehole River at Old Faithful, YNP
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 7,372 feet / 2,247 meters

Nearest Address:
Mallard Lake Trail
Yellowstone National Park, WY 82190
Teton County

GPS Coordinates: 44.4593333, -110.8222722

Nearby Water Temperatures

Winter Storm Warning issued December 19 at 5:13PM MST until December 20 at 5:00AM MST by NWS Riverton WY

Effective: Fri December 19, 2025, 5:13 PM
Expires: Sat December 20, 2025, 5:00 AM

* WHAT...Additional snow accumulations of 2 to 6 inches across the Absarokas and 4 to 8 inches across the Tetons and Gros Ventres. Winds gusting as high as 70 mph. * WHERE...Absaroka Mountains and Teton and Gros Ventre Mountains. * WHEN...Until 5 AM MST Saturday. * IMPACTS...Travel could be very difficult. The hazardous conditions will impact travel across Teton and Togwotee Passes. Blowing and drifting of snow is expected.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info .

Winter Weather Advisory issued December 19 at 5:13PM MST until December 20 at 5:00AM MST by NWS Riverton WY

Effective: Fri December 19, 2025, 5:13 PM
Expires: Sat December 20, 2025, 5:00 AM

* WHAT...Additional snow accumulations around an inch. Winds gusting as high as 60 mph. * WHERE...Jackson Hole and Star Valley. * WHEN...Until 5 AM MST Saturday. * IMPACTS...Travel could be difficult.

Slow down and use caution while traveling. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info .

Winter Storm Warning issued December 19 at 5:13PM MST until December 20 at 5:00AM MST by NWS Riverton WY

Effective: Fri December 19, 2025, 5:13 PM
Expires: Sat December 20, 2025, 5:00 AM

* WHAT...Additional snow accumulations of 2 to 4 inches. Additional snow around Mammoth up to an inch. Winds may gust as high as 55 mph at times. * WHERE...Yellowstone National Park. * WHEN...Until 5 AM MST Saturday. * IMPACTS...Travel could be very difficult, especially in the backcountry.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. For graphical depictions of the snowfall forecast, including the official NWS forecast, high end amounts, and low end amounts, visit https://weather.gov/riw/winter . For winter road conditions from the Wyoming Department of Transportation, visit https://wyoroad.info .

Winter Weather Advisory issued December 19 at 7:41PM MST until December 20 at 5:00AM MST by NWS Pocatello ID

Effective: Fri December 19, 2025, 7:41 PM
Expires: Sat December 20, 2025, 5:00 AM

* WHAT...Snow. Additional snow accumulations up to 3 inches. Winds gusting as high as 45 mph. * WHERE...Big Hole Mountains, Centennial Mountains - Island Park, Bear River Range, and Caribou Range. * WHEN...Until 5 AM MST Saturday. * IMPACTS...Plan on slippery road conditions. Gusty winds could bring down tree branches. Blowing snow could result in reduced visibility.

Slow down and use caution while traveling. Call 5 1 1 or visit 511.idaho.gov for the latest road conditions.