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Flash Flood in Riverside County, California

Flash Flood February 14, 2019 · Riverside County, California

$3.0M
Damage as recorded

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Heavy rainfall of 3 to 5 inches occurred on the desert slope of Mt San Jacinto and the Coachella Valley floor. This resulted in massive flooding and water flow into the Whitewater river (up to 10,000 CFS). Flooding severely damaged highway 111 causing a week long closure.

The wider storm

A major atmospheric river impacted Southern California February 13th through 15th bringing heavy rain and high winds. Over the course of 48 hours, many mountain locales recorded 8 to 10 inches of rain, with Palomar Mountain (San Diego County) recording over 10 inches of rain in 24 hours. Palm Springs recorded 3.7 inches of rain in 24 hours. This heavy rain resulted in major flash flooding and damage to roads. High snow levels resulted in flooding in the San Bernardino Mountains. Flash flood thresholds were exceeded in the Holy Fire burn scar, with an hourly maximum rainfall rate of 1.02 inches at Leach Canyon. Major flash flooding occurred at the Holy Fire burn scar. Roads were also damaged from this storm, with many roads closed for weeks for major repairs.

Began near White Water (33.8960, -116.6344).

Source: NOAA Storm Events Database, event 810221. Narratives are written by the National Weather Service forecast office that issued the report.

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