Station Name: TUOLUMNE R A GRAND CYN OF TUOLUMNE AB HETCH HETCHY
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 3,842 feet

Nearest Address:
White Wolf Road
Groveland, CA 95321
Tuolumne County

GPS Coordinates: 37.9165884, -119.6598938

Nearby Water Temperatures

Winter Storm Watch issued December 30 at 5:38PM PST until January 4 at 10:00AM PST by NWS Sacramento CA

Effective: Tue December 30, 2025, 5:38 PM
Expires: Wed December 31, 2025, 4:00 PM

* WHAT...Heavy snow possible. Accumulations are uncertain at this time but may range from 1 to 3 feet above 5500 feet. Locally higher amounts are possible at higher elevations. Winds could gust as high as 45 mph. * WHERE...West Slope Northern Sierra Nevada and Western Plumas County/Lassen Park. * WHEN...From Friday afternoon through Sunday morning. * IMPACTS...Dangerous travel conditions with chain controls and road closures possible. Low visibility due to combination of wind and heavy snow. * ADDITIONAL DETAILS...Snow accumulations remain above pass level through Friday afternoon, then drop to 5500 to 6500 feet late Friday night into Saturday.

Check the latest road conditions from Caltrans online at quickmap.dot.ca.gov or dial 5 1 1.

Winter Storm Watch issued December 31 at 11:44AM PST until January 4 at 10:00AM PST by NWS Sacramento CA

Effective: Wed December 31, 2025, 11:44 AM
Expires: Thu January 1, 2026, 4:00 PM

* WHAT...Heavy snow possible. Accumulations are uncertain at this time but may range from 2 to 4 feet above 5000 feet. Locally higher amounts are possible at higher elevations. Winds could gust as high as 45 mph. * WHERE...West Slope Northern Sierra Nevada and Western Plumas County/Lassen Park Counties. * WHEN...From Friday afternoon through Sunday morning. * IMPACTS...Dangerous travel conditions with chain controls and road closures possible. Low visibility due to combination of wind and heavy snow. * ADDITIONAL DETAILS...Snow accumulations remain above pass level through Friday afternoon, then drop to 5000 to 6000 feet late Friday night into Saturday. Potential for mountain snow to continue into early next week.

Check the latest road conditions from Caltrans online at quickmap.dot.ca.gov or dial 5 1 1.

Dense Fog Advisory issued December 31 at 10:51AM PST until January 1 at 11:00AM PST by NWS Hanford CA

Effective: Wed December 31, 2025, 10:51 AM
Expires: Wed December 31, 2025, 7:00 PM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Caruthers - San Joaquin - Selma, Delano-Wasco-Shafter, Fresno-Clovis, Hanford - Corcoran - Lemoore, Los Banos - Dos Palos, Merced - Madera - Mendota, Planada - Le Grand - Snelling, Southeast San Joaquin Valley, Visalia - Porterville - Reedley, and West Side of Fresno and Kings Counties. * WHEN...Expires at 11 AM PST this morning. Dense fog tonight until 11 AM PST Thursday. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

Winter Storm Watch issued December 30 at 12:57PM PST until January 4 at 10:00AM PST by NWS Reno NV

Effective: Tue December 30, 2025, 12:57 PM
Expires: Wed December 31, 2025, 4:00 PM

* WHAT...Heavy snow. Snow accumulations of 1 to 2 feet above 7000 feet and up to 12 inches below 7000 feet. Sierra crest ridgetops could see gusts as high as 100 mph. * WHERE...Greater Lake Tahoe Area, and Mono County. * WHEN...From Friday afternoon through Sunday morning. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Friday evening commute. Strong winds could cause damage to trees and power lines.

Monitor the latest forecasts for updates on this situation.

Winter Weather Advisory issued December 31 at 12:08PM PST until January 1 at 12:00PM PST by NWS Reno NV

Effective: Wed December 31, 2025, 12:08 PM
Expires: Thu January 1, 2026, 1:15 PM

Freezing rain this evening into the morning of New Year's Day will be light and isolated, but could create slick, icy roadways for holiday travel across colder valleys of northeast California and the eastern Sierra. ...WINTER STORM WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH SUNDAY MORNING... * WHAT...For the Winter Weather Advisory...Freezing rain. Ice accumulations up to a tenth of an inch in the Martis Valley and along Highway 395 in Mono County. For the Winter Storm Watch... Heavy snow. Snow accumulations of 1 to 2 feet above 7000 feet and up to 12 inches below 7000 feet. Sierra crest ridgetops could see gusts as high as 100 mph. * WHERE...Greater Lake Tahoe Area, and Mono County. * WHEN...For the Winter Weather Advisory...from 4 PM this afternoon to noon PST Thursday. For the Winter Storm Watch...from Friday afternoon through Sunday morning. * IMPACTS...Difficult travel conditions are possible. The hazardous conditions could impact holiday travel tonight and Thursday morning. For this weekend, travel could become very difficult at times due to heavy snow. * ADDITIONAL DETAILS...Light freezing rain tonight through Thursday morning will be isolated and confined to colder valleys, but may create slick, icy roadways in the Martis Valley, including Interstate 80 near Truckee, and along Highway 395 in Mono County. Snow accumulations of 6 to 10 inches possible along the Sierra crest in Mono County through Thursday morning.

Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. Monitor the latest forecasts for updates on this situation.

Winter Storm Watch issued December 31 at 12:08PM PST until January 4 at 10:00AM PST by NWS Reno NV

Effective: Wed December 31, 2025, 12:08 PM
Expires: Thu January 1, 2026, 1:15 PM

Freezing rain this evening into the morning of New Year's Day will be light and isolated, but could create slick, icy roadways for holiday travel across colder valleys of northeast California and the eastern Sierra. ...WINTER STORM WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH SUNDAY MORNING... * WHAT...For the Winter Weather Advisory...Freezing rain. Ice accumulations up to a tenth of an inch in the Martis Valley and along Highway 395 in Mono County. For the Winter Storm Watch... Heavy snow. Snow accumulations of 1 to 2 feet above 7000 feet and up to 12 inches below 7000 feet. Sierra crest ridgetops could see gusts as high as 100 mph. * WHERE...Greater Lake Tahoe Area, and Mono County. * WHEN...For the Winter Weather Advisory...from 4 PM this afternoon to noon PST Thursday. For the Winter Storm Watch...from Friday afternoon through Sunday morning. * IMPACTS...Difficult travel conditions are possible. The hazardous conditions could impact holiday travel tonight and Thursday morning. For this weekend, travel could become very difficult at times due to heavy snow. * ADDITIONAL DETAILS...Light freezing rain tonight through Thursday morning will be isolated and confined to colder valleys, but may create slick, icy roadways in the Martis Valley, including Interstate 80 near Truckee, and along Highway 395 in Mono County. Snow accumulations of 6 to 10 inches possible along the Sierra crest in Mono County through Thursday morning.

Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. Monitor the latest forecasts for updates on this situation.