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 April 22 at 1:22PM MDT until April 23 at 11:00PM MDT by NWS Riverton WY

Effective: Wed April 22, 2026, 1:22 PM
Expires: Thu April 23, 2026, 8:00 AM

* WHAT...Snow expected. Total snow accumulations between 4 and 10 inches, with lesser accumulations of 1 to 4 inches nearby Mammoth and the western entrance of YNP. Accumulations of 6 to 12 inches are expected across the higher elevations with up to 18 inches at Pitchstone Plateau in southwest Yellowstone. Winds gusting between 30 and 45 mph. * WHERE...Yellowstone National Park. * WHEN...Until 11 PM MDT Thursday. * IMPACTS...Travel could be very 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 current road conditions across Yellowstone National Park, visit https://nps.gov/yellowstone.

Winter Weather Advisory issued April 22 at 1:22PM MDT until April 23 at 11:00PM MDT by NWS Riverton WY

Effective: Wed April 22, 2026, 1:22 PM
Expires: Thu April 23, 2026, 8:00 AM

* WHAT...Snow expected. Total snow accumulations between 6 and 12 inches for elevations above 7,500 feet. Total accumulations around 20 inches are possible for the highest elevations of the Teton Mountains. Winds gusting between 30 and 40 mph, with gusts around 50 mph across the highest elevations. * WHERE...Teton and Gros Ventre Mountains. * WHEN...Until 11 PM MDT Thursday. * IMPACTS...Travel could be very difficult, including over Teton Pass and Togwotee Pass. * ADDITIONAL DETAILS...Total snow accumulations of 1 to 5 inches are possible for elevations below 7,500 feet.

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 April 22 at 12:38PM MDT until April 24 at 12:00AM MDT by NWS Pocatello ID

Effective: Wed April 22, 2026, 12:38 PM
Expires: Thu April 23, 2026, 6:00 AM

* WHAT...Snow ABOVE 6500 FEET ELEVATION. Total snow accumulations between 5 and 9 inches at those levels. Winds gusting as high as 45 mph. * WHERE...Big Hole Mountains, Centennial Mountains - Island Park, Bear River Range, and Caribou Range. * WHEN...Until midnight MDT Thursday Night. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Wednesday evening and Thursday morning commutes. Gusty winds could bring down tree branches.

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

Wind Advisory issued April 22 at 12:37PM MDT until April 23 at 12:00AM MDT by NWS Pocatello ID

Effective: Wed April 22, 2026, 12:37 PM
Expires: Thu April 23, 2026, 12:00 AM

* WHAT...Southwest winds 25 to 35 mph with gusts up to 45 mph. * WHERE...Shoshone/Lava Beds, Lower Snake River Plain, and Upper Snake River Plain. * WHEN...Until midnight MDT tonight. * 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.