Frost Advisory
2026-04-03T09:00:00-07:00

* WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Interior Del Norte, Coastal and Interior Humboldt, Coastal and Interior Mendocino, Northern and Western Lake County * WHEN...From 1 AM to 9 AM PDT Friday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. * ADDITIONAL DETAILS...Fog may form in some valleys, which could raise temperatures and reduce the risk of frost. Confidence is low on which valleys will see fog. Valleys that remain clear could see temperatures near or below freezing.


From Its Headwaters In Sec. 15, T3s, R1e, Hm. To To Its Junction With The Mattole River Paddle Report

Last Updated: 2025-06-28

The Whitewater River, located in the northern California region, flows from its headwaters in Sec.


Summary

15, T3S, R1E, Hm. to its junction with the Mattole River. The ideal streamflow range for rafting is between 800-1,200 cfs. The river is classified as Class III-IV, making it ideal for intermediate to advanced level rafters. The segment mileage of the river run is approximately 12 miles.

There are several notable rapids and obstacles along the Whitewater River, including the Hell's Gate rapid, which is known for its steep drop and narrow passageway. Other notable rapids include the Waterfall rapid, which features a 10-foot drop, and the S-Turn rapid, which requires precise maneuvering through a series of sharp turns.

There are specific regulations to the area, including restrictions on the use of alcohol, and a requirement for all rafters to wear appropriate safety gear, including helmets and life jackets. Additionally, there are restrictions on the number of rafts allowed on the river at one time to help preserve the natural environment.

Overall, the Whitewater River offers a thrilling and challenging rafting experience for experienced rafters looking for an adrenaline rush. It is important to follow all regulations and safety guidelines to ensure a safe and enjoyable experience.



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15-Day Weather Outlook


River Run Details

Last Updated 2025-06-28
River Levels 117 cfs (12.28 ft)
Percent of Normal 107%
Status
Class Level iii-iv
Elevation ft
Run Length 2.0 Mi
Streamflow Discharge cfs
Gauge Height ft
Reporting Streamgage USGS 11469000
       

5-Day Hourly Forecast Detail