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

Dense Fog Advisory issued December 29 at 4:36PM PST until December 30 at 12:00PM PST by NWS Sacramento CA

Effective: Mon December 29, 2025, 4:36 PM
Expires: Tue December 30, 2025, 12:00 PM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Central Sacramento Valley, Northern San Joaquin Valley, and Southern Sacramento Valley. * WHEN...From 2 AM to noon PST Tuesday. * 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 12:03PM PST until January 4 at 10:00AM PST by NWS Sacramento CA

Effective: Tue December 30, 2025, 12:03 PM
Expires: Tue December 30, 2025, 8:15 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 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 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.

Dense Fog Advisory issued December 29 at 10:53PM PST until December 30 at 12:00PM PST by NWS Hanford CA

Effective: Mon December 29, 2025, 10:53 PM
Expires: Tue December 30, 2025, 12:00 PM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...San Joaquin Valley. * WHEN...From 2 AM to noon PST Tuesday. * 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.