Data source: National Weather Service (NWS)

Winter Weather

Frost Advisory (ADVISORY) - expires October 10, 2026 at 2:15 AM EDT

Areas affected: North Oregon Coast Range Lowlands; North Oregon Coast Range; Outer Southeast Portland Metro; Linn County Lowlands; Clackamas County Cascade Foothills; Cascade Foothills of Marion and Linn Counties; Lane County Cascade Foothills; North Clark County Lowlands; South Washington Cascade Foothills

Frost Advisory issued October 9 at 10:37AM PDT until October 11 at 9:00AM PDT by NWS Portland OR

- WHAT...Temperatures as low as 33 to 36 degrees will result in frost formation.

• WHERE...In Oregon, Clackamas County Cascade Foothills, North Oregon Coast Range, North Oregon Coast Range Lowlands, Outer Southeast Portland Metro, Cascade Foothills of Marion and Linn Counties, Lane County Cascade Foothills, and Linn County Lowlands Counties. In Washington, North Clark County Lowlands and South Washington Cascade Foothills Counties.

• WHEN...From midnight Saturday Night to 9 AM PDT Sunday.

• IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

What to do: 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.

Source: NWS Portland OR

Frost Advisory (ADVISORY) - expires October 10, 2026 at 7:00 AM EDT

Areas affected: Foothills and Valleys of Pierce and Southern King Counties; Foothills and Valleys of Thurston and Lewis Counties; Middle Chehalis River Valley

Frost Advisory issued October 9 at 11:48AM PDT until October 11 at 8:00AM PDT by NWS Seattle WA

- WHAT...Temperatures as low as 34 to 36 degrees will result in frost formation.

• WHERE...Middle Chehalis River Valley, Foothills and Valleys of Pierce and Southern King Counties, and Foothills and Valleys of Thurston and Lewis Counties.

• WHEN...From midnight Saturday Night to 8 AM PDT Sunday.

• IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

What to do: Take steps now to protect tender plants from the cold.

Source: NWS Seattle WA

Source

Alert data provided by the National Weather Service (NWS). This page shows active alerts only and is refreshed daily. For real-time updates, visit weather.gov.