In effect from Thursday, Apr 02 2026 9:00 PM - Friday, Apr 03 2026 10:00 AM
Issued by NWS Portland OR
What:
Temperatures as low as 33 to 36 will result in frost
formation.
Where:
Northern and Central Coast Range Valleys and Mountains of
Oregon, Lower Columbia River and Cowlitz River Valleys, Portland
Metro Hills, Central Willamette Valley, Tualatin Valley, West
Columbia River Gorge of Oregon above 500 ft, Clackamas County
Cascade Foothills, Willapa Hills, North Clark County Lowlands, and
South Washington Cascade Foothills.
When:
From 9 PM Thursday to 10 AM PDT Friday.
Impacts:
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.
