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 Storm Watch issued April 1 at 1:47AM MDT until April 3 at 6:00PM MDT by NWS Riverton WY

Effective: Wed April 1, 2026, 1:47 AM
Expires: Wed April 1, 2026, 6:00 PM

* WHAT...Heavy snow possible. Total snow accumulations between 12 and 18 inches possible with locally up to 24 inches in the western slopes of the Tetons. In northern Yellowstone Park, 6 to 10 inches of snow is possible. Winds could gust as high as 40 mph. * WHERE...Teton and Gros Ventre Mountains and Yellowstone National Park. * WHEN...From this evening through Friday afternoon. * IMPACTS...Travel could be very difficult, including over Teton and Togwotee Passes.

Monitor the latest forecasts for updates on this situation.

Winter Storm Warning issued April 1 at 11:14AM MDT until April 3 at 6:00PM MDT by NWS Riverton WY

Effective: Wed April 1, 2026, 11:14 AM
Expires: Thu April 2, 2026, 7:00 AM

* WHAT...Heavy snow possible. Total snow accumulations between 12 and 18 inches possible with locally up to 24 inches in the western slopes of the Tetons. In northern Yellowstone Park, 6 to 10 inches of snow is possible. Winds could gust as high as 45 mph. * WHERE...Teton and Gros Ventre Mountains and Yellowstone National Park. * WHEN...From 11 PM this evening to 6 PM MDT Friday. * IMPACTS...Travel could be very difficult, including over Teton and Togwotee Passes.

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 Storm Warning issued April 1 at 12:54PM MDT until April 3 at 6:00PM MDT by NWS Riverton WY

Effective: Wed April 1, 2026, 12:54 PM
Expires: Thu April 2, 2026, 7:00 AM

* WHAT...Heavy snow possible. Total snow accumulations between 12 and 18 inches possible with locally up to 24 inches in the western slopes of the Tetons. In northern Yellowstone Park, 6 to 10 inches of snow is possible. Winds could gust as high as 45 mph. * WHERE...Teton and Gros Ventre Mountains and Yellowstone National Park. * WHEN...From 11 PM this evening to 6 PM MDT Friday. * IMPACTS...Travel could be very difficult, including over Teton and Togwotee Passes.

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 .

Wind Advisory issued April 1 at 10:53AM MDT until April 2 at 9:00PM MDT by NWS Pocatello ID

Effective: Wed April 1, 2026, 10:53 AM
Expires: Thu April 2, 2026, 6:15 AM

* WHAT...West winds 25 to 35 mph with gusts up to 50 mph expected. * WHERE...Teton Valley, Eastern Magic Valley, Shoshone/Lava Beds, Arco/Mud Lake Desert, Lower Snake River Plain, Raft River Region, Southern Hills/Albion Mountains, and Upper Snake River Plain. * WHEN...From 8 AM to 9 PM MDT Thursday. * IMPACTS...Gusty winds could make driving difficult, especially for high profile vehicles. Unsecured objects may be blown around.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. Secure outdoor objects.

Winter Weather Advisory issued April 1 at 10:53AM MDT until April 3 at 12:00PM MDT by NWS Pocatello ID

Effective: Wed April 1, 2026, 10:53 AM
Expires: Thu April 2, 2026, 6:00 AM

* WHAT...Snow expected. Total snow accumulations of 4 to 6 inches around 6500 ft, namely around Island Park. Above 6500 ft, 8 -16 inches of snow is expected. Winds gusting as high as 40 mph. * WHERE...Big Hole Mountains, Centennial Mountains - Island Park, Bear River Range, and Caribou Range. * WHEN...From midnight tonight to noon MDT Friday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Thursday morning and evening commutes.

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