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Debris Flow in Napa County, California
Debris Flow January 6, 2019 · Napa County, California
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
Mudslide partially blocking EB lane of SR 128 and Wragg Canyon Road.
The wider storm
A vigorous cold front swept through California on January 5th bringing widespread rainfall and gusty winds. Unstable air behind the frontal passage and sufficient low level shear allowed shallow thunderstorms to develop over the coastal waters, some of which contained rotating cells. Two waterspouts developed and made landfall as tornadoes on the 6th. Additionally, heavy rainfall and strong winds caused roadway flooding, minor debris flows, and numerous downed trees across the region. This storm system caused two fatalities; one caused by a downed tree in Berkeley and another man died in Santa Rosa Creek due to rising waters.
Began near Salvador (38.4492, -122.1521).
Other tornadoes from the same storm system
2 more tornadoes the National Weather Service filed under this storm episode.
Source: NOAA Storm Events Database, event 796262. Narratives are written by the National Weather Service forecast office that issued the report.
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