California, 2021

Winter Storm in California, October 17 to 18, 2021

October 17 to 18, 2021 · NWS STO · 2 events in 2 counties and zones

A weather system brought snow the Sierra for elevations generally over 5500 feet Sunday October 17th to Monday October 18th.

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
2

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS STO wrote it up.

A weather system brought snow the Sierra for elevations generally over 5500 feet Sunday October 17th to Monday October 18th.

Event by event

2 winter storm. Local standard time, as filed.

Winter Storm, Mt Shasta/Western Plumas County

When
October 17, 5:00 PM PST to October 18, 5:00 AM PST
Where
Mt Shasta/Western Plumas County forecast zone
Reported by
Public

Chester reported several inches of new snow accumulation.

Winter Storm, West Slope Northern Sierra Nevada

When
October 17, 5:00 PM PST to October 18, 5:00 AM PST
Where
West Slope Northern Sierra Nevada forecast zone
Reported by
Public

Ski resorts in the high Sierra reported between 5 and 10 inches of new snow accumulation.

What these are

Winter Storm
A storm that brought snow, sleet or freezing rain at warning levels, usually over several hours or days.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in California in 2021Every state in 2021This day in weather historyWarnings in California, October 2021

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 990754, 990755.