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

Elevation Above Sea Level: 7,372 feet

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

GPS Coordinates: 44.4593333, -110.8222722

Nearby Water Temperatures

Winter Weather Advisory issued December 26 at 3:26AM MST until December 26 at 11:00PM MST by NWS Riverton WY

Effective: Fri December 26, 2025, 3:26 AM
Expires: Fri December 26, 2025, 5:00 PM

* WHAT...Snow expected. Total snow accumulations between 6 and 10 inches, with isolated amounts 10 to 15 inches at the highest elevations. Winds gusting as high as 45 mph. * WHERE...Wind River Mountains West, Absaroka Mountains, Teton and Gros Ventre Mountains, and Salt River and Wyoming Ranges. * WHEN...Until 11 PM MST this evening. * IMPACTS...Travel could be very difficult, especially across mountain passes. * ADDITIONAL DETAILS...Snow totals up to 6 inches on South Pass, 5 to 10 inches on Togwotee Pass, and 5 to 10 inches on Teton Pass.

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 Weather Advisory issued December 26 at 3:26AM MST until December 26 at 11:00PM MST by NWS Riverton WY

Effective: Fri December 26, 2025, 3:26 AM
Expires: Fri December 26, 2025, 5:00 PM

* WHAT...Snow expected. Total snow accumulations between 2 and 6 inches across the lower elevations, and totals 6 to 10 inches across the higher elevations. Winds gusting as high as 45 mph. * WHERE...Yellowstone National Park. * WHEN...Until 11 PM MST this evening. * IMPACTS...Travel will be difficult in the backcountry. * ADDITIONAL DETAILS...Locally higher amounts 12 to 20 inches over the Madison and Pitchstone Plateaus of southwest Yellowstone. Snow totals of half an inch to 3 inches around Mammoth.

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 Weather Advisory issued December 26 at 12:39PM MST until December 27 at 5:00PM MST by NWS Riverton WY

Effective: Fri December 26, 2025, 12:39 PM
Expires: Sat December 27, 2025, 5:00 AM

* WHAT...Snow expected. Total snow accumulations between 8 and 14 inches, with amounts of 14 to 20 inches at the higher elevations. Some of the highest peaks may see isolated amounts nearing 2 feet. Winds from the southwest at 15 to 25 mph with periodic gusts of 25 to 35 mph. * WHERE...Wind River Mountains West, Absaroka Mountains, Teton and Gros Ventre Mountains, and Salt River and Wyoming Ranges. * WHEN...Until 5 PM MST Saturday. * IMPACTS...Travel could be very difficult, especially across mountain passes. * ADDITIONAL DETAILS...Snow totals of 3 to 6 inches on South Pass and 6 to 12 inches on Togwotee Pass and Teton Passes. Advisories have been extended through Saturday evening due to a second push of snow that will arrive early Saturday morning and linger into the afternoon.

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 Weather Advisory issued December 26 at 12:39PM MST until December 27 at 5:00PM MST by NWS Riverton WY

Effective: Fri December 26, 2025, 12:39 PM
Expires: Sat December 27, 2025, 5:00 AM

* WHAT...Snow expected. Total snow accumulations between 2 and 6 inches across the lower elevations, and 8 to 14 inches across the higher elevations. Portions of southwestern YNP, such as Pitchstone Plateau, may see higher amounts nearing 20 inches. Winds from the southwest at 10 to 20 mph with periodic gusts up to 30 mph. * WHERE...Yellowstone National Park. * WHEN...Until 5 PM MST Saturday. * IMPACTS...Travel will be difficult in the backcountry. * ADDITIONAL DETAILS...Advisories have been extended through Saturday evening due to a second push of snow that will arrive early Saturday morning and linger into the afternoon.

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 26 at 3:03AM MST until December 27 at 5:00AM MST by NWS Pocatello ID

Effective: Fri December 26, 2025, 3:03 AM
Expires: Fri December 26, 2025, 3:15 PM

* WHAT...Moderate to heavy snow expected. Total snow accumulations 4 to 10 inches. Winds gusting as high as 35 MPH. * WHERE...Centennial Mountains - Island Park. * WHEN...Until 5 AM MST Saturday. * IMPACTS...Travel could be very difficult.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Call 5 1 1 or visit 511.idaho.gov for the latest road conditions.

Winter Storm Warning issued December 26 at 1:49PM MST until December 27 at 5:00PM MST by NWS Pocatello ID

Effective: Fri December 26, 2025, 1:49 PM
Expires: Sat December 27, 2025, 4:00 AM

* WHAT...Moderate to heavy snow expected. Total snow accumulations 4 to 10 inches. Winds gusting as high as 35 MPH. * WHERE...Centennial Mountains - Island Park. * WHEN...Until 5 PM MST Saturday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Friday evening commute.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Call 5 1 1 or visit 511.idaho.gov for the latest road conditions.

Winter Storm Warning issued December 26 at 3:03AM MST until December 27 at 5:00AM MST by NWS Pocatello ID

Effective: Fri December 26, 2025, 3:03 AM
Expires: Fri December 26, 2025, 3:15 PM

* WHAT...Moderate to heavy snow expected. Total snow accumulations 4 to 8 inches, except 10 to 18 inches above 7000 feet. Locally higher totals in the higher elevations of the Bear River Range. Winds gusting as high as 40 MPH. * WHERE...Big Hole Mountains and Bear River Range. * WHEN...Until 5 AM MST Saturday. * IMPACTS...Travel could be very difficult.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Call 5 1 1 or visit 511.idaho.gov for the latest road conditions.

Winter Storm Warning issued December 26 at 1:49PM MST until December 27 at 5:00PM MST by NWS Pocatello ID

Effective: Fri December 26, 2025, 1:49 PM
Expires: Sat December 27, 2025, 4:00 AM

* WHAT...Moderate to heavy snow expected. Total snow accumulations 4 to 8 inches, except 10 to 18 inches above 7000 feet. Locally higher totals in the higher elevations of the Bear River Range. Winds gusting as high as 40 MPH. * WHERE...Big Hole Mountains and Bear River Range. * WHEN...Until 5 PM MST Saturday. * IMPACTS...Travel could be very difficult to impossible. Gusty winds could bring down tree branches.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Call 5 1 1 or visit 511.idaho.gov for the latest road conditions.