# HEADLINE
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FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PDT FRIDAY
FROST ADVISORY REMAINS IN EFFECT FROM 11 PM FRIDAY TO 9 AM PDT SATURDAY
# DETAILS
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WHAT
For the first Frost Advisory, temperatures of 33 to 36 degrees will result in frost formation. For the second Frost Advisory, temperatures of 33 to 36 degrees will result in frost formation.
WHERE
In Oregon, Tualatin Valley, Central Oregon Coast Range, and Central Oregon Coast Range Lowlands. In Washington, Cowlitz County Lowlands, North Clark County Lowlands, South Washington Cascade Foothills, and Willapa Hills.
WHEN
For the first Frost Advisory, until 9 AM PDT Friday. For the second Frost Advisory, from 11 PM Friday to 9 AM PDT Saturday.
IMPACTS
Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
ISSUED AT
Thursday, October 22, 2026 at 8:59 PM PDT
ISSUED BY
National Weather Service Portland OR
HEADER
URGENT - WEATHER MESSAGE
# PRECAUTIONARY/PREPAREDNESS ACTIONS
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Take steps now to protect tender outdoor plants from the cold. Consider temporarily moving outdoor potted plants indoors if they are sensitive to cold temperatures, or temporarily covering sensitive plants with a lightweight cotton fabric (i.e., bedsheets, thin blankets), as this will help retain heat and provide frost protection for your plants.
# AREAS AFFECTED
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Tualatin Valley, Central Oregon Coast Range, Central Oregon Coast Range Lowlands, Cowlitz County Lowlands, North Clark County Lowlands, South Washington Cascade Foothills, Willapa Hills
Including the cities of Kalama, Longview, Brooklyn, Grand Ronde, Tigard, Toutle, Kelso, Castle Rock, Lake Merwin, Forest Grove, Alsea, Horton, Amboy, Brush Prairie, Sherwood, Hockinson, Mary's Peak, Mapleton, Rockcreek, Alma, La Center, Hillsboro, Valsetz, Battle Ground, Hoskins, Ridgefield, Woodland, and Yacolt
