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1/3/2025
WT Staff
Got water questions? Give us a call at 877-52-WATER (877-529-2837), or email us at info@watertoday.ca
January 3, 2025 1116 am PST
Water levels above the seasonal average
Coastal Hazard Message issued by NWS San Francisco 449 am PST Fri Jan 3
BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM 9 AM PST THISMORNING THROUGH THIS EVENING...
...HIGH SURF ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING TO
3 AM PST SUNDAY...
Moderate to high risk of sneaker waves expected. For the High Surf Advisory, large breaking waves of 18 to 25 feet expected on the Pacific Coast with the exception of Northern Monterey Bay. Dangerous swimming and surfing conditions and localized beach erosion. Sneaker waves can sweep across the beach without warning, pulling people into the sea from rocks, jetties, and beaches. Sudden immersion in cold water can result in cold water shock even for the most experienced swimmers. Cold
water shock can result in dramatic changes in breathing, heart rate and blood pressure, greatly increasing the risk of drowning in rough open waters.
Inexperienced swimmers should remain out of the water due to
dangerous surf conditions.
Streamflow Situation from the network of USGS river flow gauges in California
Streamflows continue above the 90th percentile through the North Coast Region 1 watershed heading into the first weekend of 2025. The south interior Lahontan and Colorado River watersheds remain in drought mode, extreme drought in southeast Inyo County is now joined by the remaining area of Inyo County and north half of San Bernardino County in moderate drought. Colorado River watershed, south half of San Bernardino, Riverside and Imperial Counties continue below normal.
Mist, 54 degrees with a 30% chance of rain for Central Valley watershed Region 5, becoming cloudy later this afternoon, high 66. If the rain comes, it will be mostly after 4pm. The chance of rain rises to 50-50 tonight, before 10pm with widespread dense fog rolling in after 5 am. San Francisco has a current temp 53 degrees, the high just 58 ahead of a surf advisory coming into effect this evening, see below. Fair and 57 in Los Angeles, high 67 with the persistent air quality alert. Check for more information on the No Burn rule, here.
San Diego is 57 degrees, expecting a high near 65 with some sun.
Safe Drinking Water Act
Data from the California Department of Water Resources shows stored water levels above historic average. As of midnight last night, these are the calculations:
- New Bullard Bar - New Bullard Bar Dam impounds the Yuba River for form the largest reservoir in Yuba County. Currently, storage is at 77% of capacity, the water level 23% higher than historic average. Elevation 2000 ft, located in the Tahoe National Forest, this reservoir provides flood control, irrigation and power generation in Central Valley watershed Region 5.
- Folsom Lake - formed by the impoundment of the American River by Folsom Dam, in the foothills of the Sierra Nevada range, 25 miles from Sacramento, purposed for drinking water supply, irrigation, industry and hydropower; the reservoir is 37% full, at 89% of the historic average level
From our previous report:
- Lake Shasta Reservoir- impounding the Sacramento River in Shasta County for flood control, power generation and irrigation, currently filled to 77% capacity, 30% above the historic average
- Oroville Reservoir - the highest dam in the USA, 235 ft earthen dam impounding the Feather River in Butte County, serves as drinking water supply, power generation and flood control. The second largest reservoir in California, currently stocked to 68% of capacity, 26 % above historic average volume.
See how drinking water facility compliance compares in Ohio, New York, Georgia, Louisiana and California, here.
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