Spokane, WA – A frost advisory is in effect from 2 a.m. to 10 a.m. Tuesday, September 23, across northern Idaho and parts of northeast Washington, according to the National Weather Service in Spokane.
Forecasters said overnight temperatures are expected to dip between 32 and 36 degrees in sheltered valleys, bringing conditions favorable for frost. Impacted communities include Bonners Ferry, Sandpoint, Newport, Colville, Republic, Deer Park, Chewelah, Priest River, and surrounding areas.
According to the weather service, residents should take precautions to protect sensitive vegetation. “Frost could harm or kill tender outdoor plants if left uncovered,” the advisory noted. Those with gardens, crops, or outdoor potted plants are encouraged to cover them or bring them indoors.
The advisory stretches from the Northern Panhandle of Idaho to the Okanogan Highlands of Washington, including Sherman Pass, Flowery Trail Road, and Wauconda Summit along Highway 20. Commuters and early risers may also encounter chilly, frost-covered roads in rural and higher-elevation areas Tuesday morning.
This early-season frost marks one of the first widespread cold snaps of September across the Inland Northwest.
This article was produced by a journalist and may include AI-assisted input. All content is reviewed for accuracy and fairness.
Follow us on Instagram & Facebook for more relevant news stories and SUPPORT LOCAL INDEPENDENT NEWS! Have a tip? Message us!
