Weather Alerts For Plymouth, WA

# HEADLINE -------------------- FREEZE WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 8 AM PDT SATURDAY # DETAILS -------------------- WHAT Sub-freezing temperatures as low as 28 expected. WHERE Lower Columbia Basin of Oregon and Washington, Foothills of the Northern Blue Mountains of Oregon, Kittitas Valley, and Foothills of the Blue Mountains of Washington. WHEN From midnight tonight to 8 AM PDT Saturday. IMPACTS Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. ISSUED AT Friday, April 24, 2026 at 12:26 PM PDT ISSUED BY National Weather Service Pendleton OR HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Take steps now to protect tender plants from the cold. # AREAS AFFECTED -------------------- Foothills of the Blue Mountains of Washington, Foothills of the Northern Blue Mountains of Oregon, Kittitas Valley, Lower Columbia Basin of Oregon, Lower Columbia Basin of Washington Including the cities of Boardman, Pilot Rock, Ellensburg, Pendleton, Thorp, Prosser, Waitsburg, Tri-Cities, Dayton, Walla Walla, Hermiston, Athena, Ione, and Connell

Pollen Index: 10.2 Pollen Level: high Predominant Pollen: Alder, Ash and Birch. Based on past pollen counts and expected weather conditions, pollen levels for Saturday will remain stable in the very high range. This is a result of stable temperatures. Pollen producing plants are at a relatively steady level of pollination at this time.