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 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.

Winter Weather Advisory issued January 1 at 9:00AM PST until January 4 at 1:00PM PST by NWS Hanford CA

Effective: Thu January 1, 2026, 9:00 AM
Expires: Thu January 1, 2026, 5:00 PM

* WHAT...Snow expected. Total snow accumulations up to 28 inches. Winds gusting as high as 40 mph. * WHERE...Kaiser to Rodgers Ridge, Kings Canyon NP, Upper San Joaquin River, and Yosemite NP outside of the valley. * WHEN...From 1 AM Saturday to 1 PM PST Sunday. * IMPACTS...Travel could be very difficult to impossible.

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.

Winter Storm Warning issued January 1 at 2:25PM PST until January 5 at 10:00AM PST by NWS Hanford CA

Effective: Thu January 1, 2026, 2:25 PM
Expires: Thu January 1, 2026, 10:30 PM

* WHAT...Heavy snow expected. Total snow accumulations between 6 and 18 inches between 6,000 and 7,000 feet. 3 to 5 feet of accumulated snowfall above 8,000 feet. Winds gusting as high as 45 mph. * WHERE...Kaiser to Rodgers Ridge, Kings Canyon NP, Upper San Joaquin River, and Yosemite NP outside of the valley. * WHEN...From 1 AM Saturday to 10 AM PST Monday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Monday morning commute. 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. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. Persons should delay all travel if possible. If travel is absolutely necessary, drive with extreme caution and be prepared for sudden changes in visibility. Leave plenty of room between you and the motorist ahead of you, and allow extra time to reach your destination. Avoid sudden braking or acceleration, and be especially cautious on hills or when making turns. Make sure your car is winterized and in good working order.

Winter Storm Warning issued January 1 at 1:14PM PST until January 5 at 4:00PM PST by NWS Sacramento CA

Effective: Thu January 1, 2026, 1:14 PM
Expires: Fri January 2, 2026, 4:15 PM

* WHAT...Heavy snow expected above 5000 feet. Total snow accumulations of 6 to 12 inches above 5000 feet, with 2 to 4 feet above 6000 feet. Locally higher amounts at highest peaks. Winds gusting as high as 55 mph. * WHERE...West Slope Northern Sierra Nevada and Western Plumas County/Lassen Park above 5000 feet. * WHEN...From 10 PM Friday to 4 PM PST Monday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Friday evening through Monday morning commutes. Strong winds could cause tree damage. * ADDITIONAL DETAILS...Snow levels 6500-7500 feet Friday night into Saturday morning, lowering to 5000 to 6000 feet Saturday afternoon into Sunday, and further to around 4500 to 5500 feet by early Monday morning. Heaviest snow expected on Sunday.

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

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.

Winter Storm Warning issued January 1 at 12:16PM PST until January 5 at 10:00AM PST by NWS Reno NV

Effective: Thu January 1, 2026, 12:16 PM
Expires: Fri January 2, 2026, 1:15 PM

* WHAT...Heavy snow. Snow accumulations of 1 to 3 feet above 8000 feet with up to 4 feet locally on highest peaks. 1 to 4 inches for communities along Highway 395. Ridgetop winds gusting over 100 mph at times. * WHERE...Mono County. * WHEN...From 12 AM PST Saturday to 10 AM PST Monday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions will impact weekend travel in and across the Sierra. Strong winds could cause damage to trees and power lines. * ADDITIONAL DETAILS...For this afternoon...snow will continue to taper off, but light snow showers in Mono County may result in additional travel impacts.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.

Flood Advisory issued January 1 at 9:35AM PST until January 1 at 10:45AM PST by NWS Hanford CA

Effective: Thu January 1, 2026, 9:35 AM
Expires: Thu January 1, 2026, 10:45 AM

* WHAT...Flooding caused by excessive rainfall continues. * WHERE...A portion of central California, including the following counties, Fresno and Madera. * WHEN...Until 1045 AM PST. * IMPACTS...Minor flooding in low-lying and poor drainage areas. * ADDITIONAL DETAILS... - At 935 AM PST, Doppler radar indicated heavy rain. Minor flooding is ongoing or expected to begin shortly in the advisory area. - Some locations that will experience flooding include... Fresno, Clovis, Sanger, Reedley, Fancher Creek, Hurley, Auberry, Trimmer Springs, Friant, Millerton Lake and Yokuts Valley. - http://www.weather.gov/safety/flood

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.