Frost advisory for Southwest Washington forecast to expire at 9 a.m.

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The advisory had been issued for Willapa and Wahkiakum Lowlands, Willapa Hills, Cowlitz County Lowlands, North Clark County Lowlands, Inner Vancouver Metro and South Washington Cascade Foothills.

"Temperatures continue to rise throughout the area and frost has dissipated. Cannot rule out patchy areas of frost in isolated shaded locations, but will no longer be widespread," according to the NWS Portland OR.

The advisory is in effect until 9 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 April 8, 2026 at 8:52 AM.