Frost advisory for Eastern Washington expected to expire at 8 a.m.

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The advisory had been issued for Northeast Mountains, Okanogan Highlands and Western Okanogan County.

"Areas of morning frost will come to an end after 8 am as temperatures continue to warm through the morning," explains the NWS Spokane WA.

The advisory is in effect until 8 a.m.

Frost advisory - this is what it means

Frost advisories are issued from May to October (but can be extended if necessary) when temperatures, winds, and sky cover are favorable for frost development. This is most likely to happen when the temperature is 36 degrees or less. In some cases, the frost is severe enough to end the growing season and is then referred to as a 'killing frost'.

According to the NWS, if a frost advisory is issued for your area, cover up sensitive plants before the sun sets so that it can help retain heat near the plants, or move the plants indoors for the night, if possible.

Source: The National Weather Service

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This story was originally published May 15, 2026 at 7:43 AM.