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United States Warnings, Watches, And Advisories Frost Advisory
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Frost Advisory
In effect:
Friday, Apr 17 2026 1:00 AM PDT – Friday, Apr 17 2026 9:00 AM PDT
Issued by NWS Seattle WA
FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM PDT FRIDAY
What:
Temperatures as low as 31 will result in frost formation.
Temperatures as low as 31 will result in frost formation.
Where:
Middle Chehalis River Valley, Foothills and Valleys of
Pierce and Southern King Counties, Foothills and Valleys of
Thurston and Lewis Counties, Lowlands of Lewis and Southern
Thurston Counties, and Willapa and Black Hills.
Middle Chehalis River Valley, Foothills and Valleys of
Pierce and Southern King Counties, Foothills and Valleys of
Thurston and Lewis Counties, Lowlands of Lewis and Southern
Thurston Counties, and Willapa and Black Hills.
When:
From 1 AM to 9 AM PDT Friday.
From 1 AM to 9 AM PDT Friday.
Impacts:
Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
Instructions:
Take steps now to protect tender plants from the cold.
Take steps now to protect tender plants from the cold.
Areas Impacted:
Foothills and Valleys of Pierce and Southern King Counties
Foothills and Valleys of Thurston and Lewis Counties
Lowlands of Lewis and Southern Thurston Counties
Middle Chehalis River Valley
Willapa and Black Hills
Frost Advisory
In effect:
Friday, Apr 17 2026 2:00 AM PDT – Friday, Apr 17 2026 9:00 AM PDT
Issued by NWS Eureka CA
FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 9 AM PDT FRIDAY
What:
Temperatures as low as 33 could result in frost formation.
Temperatures as low as 33 could result in frost formation.
Where:
Del Norte, Humboldt, and Mendocino Coast, and Southern
Mendocino Interior.
Del Norte, Humboldt, and Mendocino Coast, and Southern
Mendocino Interior.
When:
From 2 AM to 9 AM PDT Friday.
From 2 AM to 9 AM PDT Friday.
Impacts:
Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
Instructions:
Take steps now to protect tender plants from the cold.
Take steps now to protect tender plants from the cold.
Areas Impacted:
Coastal Del Norte
Northern Coastal Humboldt
Southwestern Humboldt
Coastal Mendocino
Southwestern Interior Mendocino
Southeastern Interior Mendocino
Frost Advisory
In effect:
Friday, Apr 17 2026 1:00 AM PDT – Friday, Apr 17 2026 9:00 AM PDT
Issued by NWS Portland OR
FROST ADVISORY REMAINS IN EFFECT FROM 1 AM TO 9 AM PDT FRIDAY
What:
Temperatures of 32 to 36 degrees will result in frost
formation.
Temperatures of 32 to 36 degrees will result in frost
formation.
Where:
Northern and Central Coast Range Valleys and Mountains of
Oregon, Eastern Portland/Vancouver Metro, Lower Columbia River and
Cowlitz River Valleys, Central Willamette Valley, Tillamook County
Coast, Central Coast of Oregon, Tualatin Valley, Portland West
Hills and Chehalem Mountain, Willapa Hills, North Clark County
Lowlands, and South Washington Cascade Foothills.
Northern and Central Coast Range Valleys and Mountains of
Oregon, Eastern Portland/Vancouver Metro, Lower Columbia River and
Cowlitz River Valleys, Central Willamette Valley, Tillamook County
Coast, Central Coast of Oregon, Tualatin Valley, Portland West
Hills and Chehalem Mountain, Willapa Hills, North Clark County
Lowlands, and South Washington Cascade Foothills.
When:
From 1 AM to 9 AM PDT Friday.
From 1 AM to 9 AM PDT Friday.
Impacts:
Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
Instructions:
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.
Consider 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.
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.
Consider 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 Impacted:
Tillamook County Coast
Central Coast of Oregon
North Oregon Coast Range Lowlands
Central Oregon Coast Range Lowlands
North Oregon Coast Range
Central Oregon Coast Range
Lower Columbia River
Tualatin Valley
West Hills and Chehalem Mountains
East Portland Metro
Outer Southeast Portland Metro
West Central Willamette Valley
East Central Willamette Valley
Willapa Hills
Cowlitz County Lowlands
North Clark County Lowlands
East Clark County Lowlands
South Washington Cascade Foothills
Frost Advisory
In effect:
Friday, Apr 17 2026 12:00 AM PDT – Friday, Apr 17 2026 11:00 AM PDT
Issued by NWS Medford OR
FROST ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 11 AM PDT FRIDAY
What:
Temperatures below 36 degrees will result in frost
formation.
Temperatures below 36 degrees will result in frost
formation.
Where:
The valleys of Douglas and Coos counties, including
Roseburg, Coquille, Myrtle Point, Camas Valley, Winston, Elkton,
Sutherlin, Canyonville, and Myrtle Creek.
The valleys of Douglas and Coos counties, including
Roseburg, Coquille, Myrtle Point, Camas Valley, Winston, Elkton,
Sutherlin, Canyonville, and Myrtle Creek.
When:
From midnight tonight to 11 AM PDT Friday.
From midnight tonight to 11 AM PDT Friday.
Impacts:
Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
Instructions:
Take steps now to protect tender plants from the cold.
Take steps now to protect tender plants from the cold.
Areas Impacted:
South Central Oregon Coast
Central Douglas County