Station Name: TUOLUMNE R AB EARLY INTAKE NR MATHER CA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 2,493 feet

Nearest Address:
Preston Falls Trail
Groveland, CA 95321
Tuolumne County

GPS Coordinates: 37.87936848, -119.947126

Nearby Water Temperatures

Flood Watch issued January 3 at 11:55PM PST until January 5 at 4:00PM PST by NWS Sacramento CA

Effective: Sat January 3, 2026, 11:55 PM
Expires: Sun January 4, 2026, 4:15 PM

* WHAT...Flooding caused by excessive rainfall continues to be possible. Additional rainfall of 1 to 3 inches is expected below 4000 ft, highest in the foothills. * WHERE...A portion of northern California below 4000 feet in elevation, including the following areas, Sacramento Valley, Motherlode, Mountains Southwestern Shasta County to Western Colusa County, Northeast foothills, and Shasta Lake Area / Northern Shasta County. * WHEN...Through Monday afternoon. * IMPACTS...Excessive runoff will result in rises along area rivers, creeks, streams. Small streams and creeks may rise out of their banks. Flooding may occur in low-lying, poor drainage, and urban areas. Mudslides and rockslides may occur in mountain and foothill areas. * ADDITIONAL DETAILS... - http://www.weather.gov/safety/flood

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Winter Storm Warning issued January 3 at 11:53PM PST until January 5 at 4:00PM PST by NWS Sacramento CA

Effective: Sat January 3, 2026, 11:53 PM
Expires: Sun January 4, 2026, 4:15 PM

* WHAT...Heavy snow expected above 5000 feet. Additional snow accumulations of 4 to 8 inches above 4500 feet. 1 to 2 feet above 5000 feet, and 2 to 4 feet above 6000 feet. Locally higher amounts over the 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...Until 4 PM PST Monday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact weekend travel and the Monday morning commute. Strong winds could cause tree damage. * ADDITIONAL DETAILS...Snow levels around 5000 to 6000 on Sunday, lowering further to around 4000 to 5000 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 Storm Warning issued January 4 at 9:32AM PST until January 5 at 10:00AM PST by NWS Hanford CA

Effective: Sun January 4, 2026, 9:32 AM
Expires: Sun January 4, 2026, 6:00 PM

* WHAT...Heavy snow. Additional snow accumulations up to 29 inches. Winds gusting as high as 35 mph. * WHERE...A portion of central California. * WHEN...Until 10 AM PST Monday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult to impossible. The hazardous conditions could impact the Monday morning commute.

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 4 at 3:28PM PST until January 5 at 10:00AM PST by NWS Hanford CA

Effective: Sun January 4, 2026, 3:28 PM
Expires: Mon January 5, 2026, 12:00 AM

* WHAT...Heavy snow. Additional snow accumulations up to 18 inches. * WHERE...A portion of central California. * WHEN...Until 10 AM PST Monday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult to impossible. The hazardous conditions could impact the Monday morning commute.

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.

Flood Advisory issued January 4 at 2:11PM PST until January 4 at 9:00PM PST by NWS Sacramento CA

Effective: Sun January 4, 2026, 2:11 PM
Expires: Sun January 4, 2026, 9:00 PM

* WHAT...Flooding caused by excessive rainfall continues. * WHERE...A portion of northern California, including the following counties, Calaveras, San Joaquin, Stanislaus and Tuolumne. * WHEN...Until 900 PM PST Sunday. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Water over roadways. Overflowing poor drainage areas. Risk of mud and rock slides in the foothills. * ADDITIONAL DETAILS... - At 207 PM PST, Doppler radar and automated rain gauges indicated heavy rain. Local law enforcement reported flooded roadways from heavy rain. Overflowing poor drainage areas have already caused minor flooding in the advisory area. Between 0.5 and 2 inches of rain have fallen. - Some locations that will experience flooding include... Stockton, Modesto, Tracy, Turlock, Ceres, Oakdale, Sonora, San Andreas, Manteca, Riverbank, Patterson, Lathrop, Ripon, Waterford, Escalon, East Oakdale, Empire, Del Rio, Eugene and Bystrom. - http://www.weather.gov/safety/flood

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

Flood Watch issued January 4 at 12:49PM PST until January 5 at 4:00PM PST by NWS Sacramento CA

Effective: Sun January 4, 2026, 12:49 PM
Expires: Mon January 5, 2026, 4:00 PM

* WHAT...Flooding caused by excessive rainfall continues to be possible. Additional rainfall of 0.75 to 3 inches is expected below 4000 ft, highest amounts expected over Shasta County and the foothills. * WHERE...A portion of northern California, including the following areas, Central Sacramento Valley, Motherlode, Mountains Southwestern Shasta County to Western Colusa County, Northeast Foothills/Sacramento Valley, Northern Sacramento Valley, Shasta Lake Area / Northern Shasta County and Southern Sacramento Valley. * WHEN...Through Monday afternoon. * IMPACTS...Excessive runoff will result in rises along area rivers, creeks, streams. Small streams and creeks may rise out of their banks. Flooding may occur in low-lying, poor drainage, and urban areas. Mudslides and rockslides may occur in mountain and foothill areas. * ADDITIONAL DETAILS... - http://www.weather.gov/safety/flood

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Winter Storm Warning issued January 4 at 12:45PM PST until January 5 at 4:00PM PST by NWS Sacramento CA

Effective: Sun January 4, 2026, 12:45 PM
Expires: Mon January 5, 2026, 4:00 PM

* WHAT...Heavy snow expected above 5000 feet. Additional snow accumulations of 4 to 8 inches above 4500 feet. 1 to 2 feet above 5000 feet, and 2 to 3 feet above 6000 feet. Locally higher amounts over the highest peaks. Winds gusting as high as 55 mph. * WHERE...West Slope Northern Sierra Nevada and Western Plumas County/Lassen Park Counties. * WHEN...Until 4 PM PST Monday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact travel today and the Monday morning commute. Strong winds could cause tree damage. * ADDITIONAL DETAILS...Snow levels around 5000 to 6000 today, lowering further to around 4000 to 5000 feet by early Monday morning. Heaviest snow expected today.

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

Flood Watch issued January 4 at 2:11AM PST until January 5 at 4:00PM PST by NWS Hanford CA

Effective: Sun January 4, 2026, 2:11 AM
Expires: Sun January 4, 2026, 10:00 AM

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of central California, including the following areas, Fresno-Tulare Foothills, Fresno-Tulare Lower Sierra, Mariposa Madera Foothills, Mariposa-Madera Lower Sierra, San Joaquin River Canyon, South End Sierra Foothills, South End of the Lower Sierra and Yosemite Valley. * WHEN...Through Monday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - http://www.weather.gov/safety/flood

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Flood Watch issued January 4 at 9:31AM PST until January 5 at 4:00PM PST by NWS Hanford CA

Effective: Sun January 4, 2026, 9:31 AM
Expires: Sun January 4, 2026, 6:00 PM

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of central California, including the following areas, Fresno-Tulare Foothills, Fresno-Tulare Lower Sierra, Mariposa Madera Foothills, Mariposa-Madera Lower Sierra, San Joaquin River Canyon, South End Sierra Foothills, South End of the Lower Sierra and Yosemite Valley. * WHEN...Through Monday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - http://www.weather.gov/safety/flood

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Flood Advisory issued January 4 at 3:44PM PST until January 4 at 5:00PM PST by NWS Hanford CA

Effective: Sun January 4, 2026, 3:44 PM
Expires: Sun January 4, 2026, 5:00 PM

* WHAT...Flooding caused by excessive rainfall continues. * WHERE...A portion of central California, including the following counties, Fresno, Madera, Mariposa and Merced. * WHEN...Until 500 PM PST. * IMPACTS...Minor flooding in low-lying and poor drainage areas. * ADDITIONAL DETAILS... - At 344 PM 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, Merced, Madera, Atwater, Chowchilla, Kerman, Livingston, Madera Acres, Bootjack, Parksdale, Parkwood, Yosemite Lakes, Bonadelle Ranchos-Madera Ranchos, Winton, Biola, Delhi, Hilmar-Irwin, Mariposa and Planada. - http://www.weather.gov/safety/flood

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

Flood Advisory issued January 4 at 3:32PM PST until January 4 at 5:00PM PST by NWS Hanford CA

Effective: Sun January 4, 2026, 3:32 PM
Expires: Sun January 4, 2026, 5:00 PM

* WHAT...Flooding caused by excessive rainfall continues. * WHERE...A portion of central California, including the following counties, Fresno, Madera and Tulare. * WHEN...Until 500 PM PST. * IMPACTS...Minor flooding in low-lying and poor drainage areas. * ADDITIONAL DETAILS... - At 332 PM 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... Sanger, Reedley, Orange Cove, Trimmer Springs, Fence Meadow, Yokuts Valley, Mountain Rest, Fancher Creek, Balch Power House, Shaver Lake, Shaver Lake 3ne, Auberry, Hurley, Pinehurst, Azalea Campground, Crystal Springs Campground, Sunset Campground, Grant Grove Visitor Center, Grant Grove and Park Ridge. - http://www.weather.gov/safety/flood

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

Flood Advisory issued January 4 at 10:10AM PST until January 4 at 3:00PM PST by NWS Sacramento CA

Effective: Sun January 4, 2026, 10:10 AM
Expires: Sun January 4, 2026, 3:00 PM

* WHAT...Flooding caused by excessive rainfall continues. * WHERE...Portions of central and northern California, including the following counties, in central California, Placer. In northern California, Amador, Calaveras, El Dorado, Nevada, Sacramento, San Joaquin, Solano, Sutter and Yolo. * WHEN...Until 300 PM PST. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Water over roadways. Ponding of water in urban or other areas is occurring or is imminent. * ADDITIONAL DETAILS... - At 1009 AM PST, Doppler radar indicated heavy rain. Overflowing poor drainage areas will cause minor flooding in the advisory area. Between 0.5 and 2 inches of rain have fallen. - Some locations that will experience flooding include... Sacramento, Stockton, Elk Grove, Roseville, Citrus Heights, Folsom, Davis, Rocklin, Woodland, Galt, Auburn, Placerville, Jackson, Fair Oaks, Carmichael, El Dorado Hills, Cameron Park, Paloma, Rancho Cordova and Lodi. - http://www.weather.gov/safety/flood

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

Flood Advisory issued January 4 at 2:11PM PST until January 4 at 9:00PM PST by NWS Sacramento CA

Effective: Sun January 4, 2026, 2:11 PM
Expires: Sun January 4, 2026, 9:00 PM

* WHAT...Flooding caused by excessive rainfall continues. * WHERE...Portions of central and northern California, including the following counties, in central California, Placer. In northern California, Amador, Calaveras, El Dorado, Nevada, Sacramento, San Joaquin, Solano, Sutter and Yolo. * WHEN...Until 900 PM PST Sunday. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Water over roadways. Ponding of water in urban or other areas is occurring or is imminent. Risk of mud and rock slides in the foothills. * ADDITIONAL DETAILS... - At 207 PM PST, Doppler radar and automated rain gauges indicated heavy rain. Overflowing poor drainage areas have already caused minor flooding in the advisory area. Local law enforcement reported flooded roadways from heavy rain. Between 0.5 and 2.5 inches of rain have fallen. - Some locations that will experience flooding include... Sacramento, Stockton, Elk Grove, Roseville, Citrus Heights, Folsom, Davis, Rocklin, Woodland, Galt, Auburn, Placerville, Jackson, Fair Oaks, Carmichael, El Dorado Hills, Cameron Park, Paloma, Rancho Cordova and Lodi. - http://www.weather.gov/safety/flood

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