Heavy Rain in Sierra County, California

Heavy Rain March 20, 2018 – March 22, 2018 · Sierra County, California

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

What the National Weather Service wrote

Trained weather spotter 1 mile south of Sattley reported 5.80 inches of rainfall from 20 March 1630PST to 22 March 1630PST. Before the 48-hour period, there was a foot of snow on the ground, which almost completely melted.

The wider storm

The first part of this storm consisted of warm air advection precipitation that spread through the northern Sierra. Moist upslope flow brought precipitation into Mono County at the same time. The second part of this storm moved into the Sierra Nevada on the 21st and 22nd in the form of a fairly significant atmospheric river, tapping a deep plume of moisture moving in from the Eastern Pacific.

Began near Sattley (39.6055, -120.4300).

Source: NOAA Storm Events Database, event 748957. Narratives are written by the National Weather Service forecast office that issued the report.

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