South Fork Headwaters To San Gorgonio Wilderness Boundary/Sf Diversion Dam Paddle Report

× Flood Watch
Until 2025-12-21T22:30:00-08:00 • National Weather Service
* WHAT...Flooding caused by excessive rainfall is possible. * WHERE...A portion of Southwest California, including the following areas, Apple and Lucerne Valleys, Coachella Valley, Orange County Coastal Areas, Orange County Inland Areas, Riverside County Mountains, San Bernardino County Mountains, San Bernardino and Riverside County Valleys-The Inland Empire, San Gorgonio Pass near Banning and Santa Ana Mountains and Foothills. * WHEN...From Tuesday afternoon through Wednesday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Mud and debris flow are possible near and in burn scars, including the Airport, Bridge and Line burn scars. * ADDITIONAL DETAILS... - An Atmospheric River is expected to bring widespread moderate to heavy rain to the area late Tuesday through Wednesday. Showers could begin to develop as early as Tuesday evening, especially in the mountains. Heaviest most widespread rain is expected Wednesday morning continuing through the afternoon in the Coachella Valley and in the mountains. Peak rainfall rates of 0.50 to 1 inch per hour are expected. There is a potential for locally heavier hourly rainfall rates to develop with convection embedded in the main rain band or in thunderstorms after the main band passes. Scattered locally heavy showers could continue into Thursday but impacts from any additional rain are expected to be more localized. -Snow levels are expected to remain above 8000 ft during period of heaviest precipitation bringing a heightened risk of mud slides, debris flow, and areas of flash flooding in the San Bernardino county mountains. - https://www.weather.gov/safety/flood