Debris Flow — San Diego, California

2020-04-09 · near Rancho Bernardo, San Diego, California

Event narrative

Mudslide under a home spilled onto Black Mountain Road in Rancho Penasquitos, closing part of the road and causing stress to owner's house and property.

Wider weather episode

An atmospheric river (300-400 IVT) brought widespread heavy rain to Southern California on April 6th. A few showers lingered into April 7th, but it was low impact. A warm front moved through the region on April 8th and brought waves of showers from south to north, with persistent heavy snow in the San Bernardino Mountains. Following the warm front, an upper low moved into the California Bight and stalled on April 9th, bringing 3 to 5 inches of rain to Orange County and San Diego County through the 10th. Numerous flash floods and floods occurred, especially in coastal cities. The San Diego River at Fashion Valley reached 12.5 feet (minor flood stage). Many locations recorded their highest daily rainfall record: San Diego (1.98), Chula Vista (1.56), and Vista (3.18). Oceanside Harbor recorded their wettest 24-hours on record with 3.06.

View location on OpenStreetMap → (32.9721, -117.1329)

Source: NOAA Storm Events Database, event_id 887869. Narrative written by the NWS forecast office that issued the report.