Name: Heavy Snow in California, January 18 to 19, 2017
Start: 2017-01-18T05:00
End: 2017-01-19T07:00
Location: California

Where it happened

Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

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The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 1

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 MFR wrote it up.

Yet another storm brought more heavy snow to areas that have been inundated with heavy snow from previous storms.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Medford, OR wrote its last area forecast discussion before the first event at Jan 18, 3:56 AM PST, 1 hour 4 minutes earlier.

Area forecast discussion, Jan 18, 3:56 AM PST, 1 hour 4 minutes before

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In the hours before

Local storm report, Jan 18, 4:52 AM PST, 8 minutes before

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The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

1 heavy snow. Local standard time, as filed.

Heavy Snow, South Central Siskiyou County

When: January 18, 5:00 AM PST to January 19, 7:00 AM PST
Where: South Central Siskiyou County forecast zone
Reported by: Trained Spotter
Coordinates: 41.593, -122.540 (the zone’s center; the record gives no point)

A spotter 2SSW Weed reported 16.0 inches of heavy wet snow in 24 hours as of 19/0753 PST. He also reported high winds with tree damage. A spotter 3SSE Mount Shasta City reported 13.0 inches of snow in 12 hours ending at 18/1800 PST. A spotter 3NW Mount Shasta City reported 16.0 inches of snow in 24 hours ending at 19/0200 PST. A spotter in Mount Shasta City reported 14.0 inches of snow as of 19/0900 PST. 5 inches of it fell between 18/1640 PST and 19/0900 PST. The cooperative observer at Mount Shasta City reported 12.0 inches of snow in 24 hours ending at 19/0600 PST.

What these are

Heavy Snow: Snowfall reaching the local warning threshold without the other hazards of a winter storm.

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

The same day elsewhere

More

Every storm in California in 2017 Every state in 2017 This day in weather history Warnings in California, January 2017

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: 668201.