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 February 24 at 11:43AM MST until February 25 at 5:00PM MST by NWS Riverton WY

Effective: Tue February 24, 2026, 11:43 AM
Expires: Wed February 25, 2026, 7:00 AM

* WHAT...Snow expected. Additional snow accumulations between 1 and 4 inches. Highest totals are expected across the northern valley, from Moose to Moran Junction. Winds gusting as high as 30 mph Tuesday, increasing to 45 mph Wednesday. * WHERE...Jackson Hole. * WHEN...Until 5 PM MST Wednesday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Tuesday morning and evening commutes. * ADDITIONAL DETAILS...Precipitation is expected to change over to rain or a rain/snow mix Tuesday afternoon and last through much of the night Tuesday night. Rain will then change back over to snow by Wednesday 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 February 24 at 11:43AM MST until February 25 at 5:00PM MST by NWS Riverton WY

Effective: Tue February 24, 2026, 11:43 AM
Expires: Wed February 25, 2026, 7:00 AM

* WHAT...Heavy snow. Additional snow accumulations 12 to 22 inches. Locally higher amounts up to 3 feet possible in the Tetons. West wind frequently gusting 25 to 35 mph Tuesday, increasing to 35 to 45 mph Wednesday. * WHERE...Teton and Gros Ventre Mountains and Salt River and Wyoming Ranges. * WHEN...Until 5 PM MST Wednesday. * IMPACTS...Snowfall rates up to 2"/hr will be possible Tuesday afternoon. Travel could be very difficult. The hazardous conditions could impact the Tuesday evening and Wednesday morning commutes.

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 February 24 at 11:43AM MST until February 25 at 5:00PM MST by NWS Riverton WY

Effective: Tue February 24, 2026, 11:43 AM
Expires: Wed February 25, 2026, 7:00 AM

* WHAT...Heavy snow. Additional snow accumulations 10 to 20 inches over the Pitchstone Plateau of southwest Yellowstone National Park. Locally higher amounts over 2 feet will be possible. 4 to 8 inches in central portions of Yellowstone, and up to 3 inches in Lamar Valley and Mammoth. West wind 15 to 30 mph. * WHERE...Yellowstone National Park. * WHEN...Until 5 PM MST Wednesday. * IMPACTS...Backcountry travel will be very difficult.

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 February 25 at 1:31AM MST until February 25 at 5:00PM MST by NWS Riverton WY

Effective: Wed February 25, 2026, 1:31 AM
Expires: Wed February 25, 2026, 5:00 PM

* WHAT...Heavy snow. Additional snow accumulations of 6 to 12 inches, with isolated higher amounts up to 15 inches. West winds with frequent gusts of 40 to 50 mph. * WHERE...Teton and Gros Ventre Mountains and Salt River and Wyoming Ranges. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Wednesday morning commute, especially over Teton and Togwotee Passes. * ADDITIONAL DETAILS...Snowfall rates will generally be between 0.5 and 1 inches per hour.

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 February 25 at 1:31AM MST until February 25 at 5:00PM MST by NWS Riverton WY

Effective: Wed February 25, 2026, 1:31 AM
Expires: Wed February 25, 2026, 5:00 PM

* WHAT...Heavy snow. Additional snow accumulations of 5 to 10 inches over the Pitchstone Plateau, with isolated amounts up to 12 inches. An additional 2 to 5 inches across central portions of Yellowstone and up to 1 inch in Lamar Valley and Mammoth. Gusty west winds of 20 to 35 mph. * WHERE...Yellowstone National Park. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Backcountry travel will be very difficult.

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.