UPDATE: Weather service issues Winter Storm Warning for weekend

Jessica Skropanic
Siskiyou Daily News

Friday afternoon the National Weather Service in Medford will declare a Winter Storm Warning for Siskiyou County, in effect from 1 p.m. Saturday to 10 p.m. Sunday

Siskiyou County residents can expect 10- to 20-inches of snow to fall during that period, NWS meteorologist Brett Lutz said.

"Saturday night will bring the worst (road conditions) — especially from Castle Crags to Weed, along Interstate-5," Lutz said. "Highway 89 will be seriously affected as well."

There's also a Winter Storm Watch out for 10 p.m. Sunday to 10 p.m. Monday for Siskiyou County, Lutz said.

The NWS is in the process of issuing Winter Storm Warnings for other parts of Northern California, including parts of the Sacramento Valley and Lassen County, he said.

10 a.m. Friday: Winter storm to last through Wednesday

A winter storm bringing heavy snow to the Mount Shasta and Weed areas will last into the middle of next week.

On Friday, meteorologists at the National Weather Service in Medford amended previous forecasts, saying the storm won't likely dissipate until Wednesday. 

Motorists should expect travel delays along the Interstate 5 corridor between Saturday night and Wednesday. The combination of light wind gusts and falling snow could make visibility poor.

People driving through high mountain passes are especially vulnerable to gusty winds and high snow levels, the NWS said.

Wednesday: Expect heavy snow, travel delays this weekend

As much as three feet of snow could fall in parts of Siskiyou County this weekend.

Snow levels could drop below 2,000 feet, impacting travel along Interstate 5 and other roads throughout northern California and southern Oregon.

Winter storms will last through next week, according to the National Weather Service in Medford, Oregon.

Yreka will likely see the first few flurries late Wednesday night or Thursday morning. 

Skies clear on Friday before snow starts in earnest on Saturday — probably in the evening, NWS meteorologist Shad Keene said. 

Moderate snow will fall in Mount Shasta, McCloud and Dunsmuir on Saturday, Keene said. Those areas will then be hit hardest by heavy snow on Sunday and Monday before the storm tapers off on Tuesday. 

A total of one to three feet of snow will fall in Mount Shasta — most from Saturday night into Sunday morning, and again from Sunday night into Monday, Keene said.

Temperatures in many places throughout the county will drop below freezing during the night.

  • In Yreka, Weed and Dunsmuir: Daytime temperatures will reach the mid- to upper 30s , but will drop into the 20s at night. Expect light gusty winds off and on throughout the week — the worst on Saturday and some wind on Monday.
  • At high elevations: Daytime temperatures will hover in the teens, dropping to single digits as night. Keene recommends motorists avoid travel at higher elevations. 

Motorists should prepare for significant travel impacts along major roadways like I-5, Highway 89 and 97, according to a NWS briefing Wednesday. Expect slick roads and heavy wet snowfall, with moderate to heavy snow at major passes along I-5 and Highway 140. 

Saturday evening will likely bring the worst weather for travel on roads near Weed, Keene said. Strong gusty winds mixed with falling snow could make visibility "really bad."

While meteorologists expect the worst of the storm to hit  the mountains and the Mount Shasta and Weed areas, flurries could fall at lower elevations, too, the NWS said. If it does fall, it won't likely stick.

Jessica Skropanic is a features reporter for the Record Searchlight/USA Today Network. She covers science, arts, social issues and entertainment stories. Follow her on Twitter @RS_JSkropanic and on Facebook. Join Jessica in the Get Out! Nor Cal recreation Facebook group. To support and sustain this work, please subscribe today. Thank you.