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Debris Flow in Napa County, California
Debris Flow February 13, 2019 · Napa County, California
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
Rock slide on Howell Mountain Rd at Sunset Dr.
The wider storm
An atmospheric river with an associated cold front moved through the region from February 12th to the 15th bringing widespread flooding and debris flows. Multiple mainstem rivers flooded prompting evacuations from local officials. Strong wind gusts caused downed trees, power outages, and structural damage. Additionally, a tree fell on a car causing one fatality and one serious injury on Highway 17 while another downed tree caused a serious multi-car traffic accident that resulted in another fatality as well as major injuries. The areas peaks received upwards of 10 inches of rainfall and widespread wind gusts of 50 to 60 mph were observed. Mount Saint Helena recorded wind gusts of 80 mph.
Began near Angwin (38.5571, -122.4532).
Source: NOAA Storm Events Database, event 800877. Narratives are written by the National Weather Service forecast office that issued the report.
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