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 The Reserve Boundary In Sec. 18, T3n, R1e, H.M. To To The Headwaters In Sec. 22 And 28, T3n, R1e, H.M. Paddle Report

Last Updated: 2026-04-01

The Whitewater River run in California is a popular whitewater rafting destination for adventure enthusiasts.


Summary

The ideal streamflow range for this segment of the river is between 500-2000 cfs. The class rating of the river ranges from Class II-IV depending on the water level. The total segment mileage is approximately 7.5 miles, starting from the reserve boundary in Sec. 18, T3N, R1E, H.M. to the headwaters in Sec. 22 and 28, T3N, R1E, H.M.

The river has several specific rapids and obstacles that add to the thrill of the adventure. The most popular rapids include The Pucker Factor, The Maze, The Slide, and The Staircase. These rapids range from Class II-IV and require experienced rafters to navigate them safely. The river also has several boulder gardens, which can be challenging to maneuver.

There are specific regulations that must be followed while rafting on the Whitewater River. All rafters must wear a personal flotation device at all times. Alcohol and drug use are strictly prohibited while rafting. Additionally, no littering is allowed, and all trash must be packed out.

In conclusion, the Whitewater River run in California is a thrilling adventure for experienced rafters. The ideal streamflow range is between 500-2000 cfs, and the class rating ranges from Class II-IV. The segment mileage is approximately 7.5 miles, with several specific rapids and obstacles. Specific regulations such as wearing a personal flotation device and prohibiting alcohol and drug use must be followed.



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15-Day Weather Outlook


River Run Details

Last Updated 2026-04-01
River Levels 1300 cfs (10.43 ft)
Percent of Normal 11%
Status
Class Level ii-iv
Elevation ft
Run Length 6.0 Mi
Streamflow Discharge cfs
Gauge Height ft
Reporting Streamgage USGS 11477000
       

5-Day Hourly Forecast Detail