Impact Level: Notification
Locations Affected: Portland, Oregon, United States
Tracking Id: RINTP2725267457
Description:
As per reports, inclement weather conditions are expected in Portland on Thursday (04 December).
• A warm front is expected to bring widespread rainfall, with precipitation likely to spread rapidly inland through early Thursday (04 December).
• The Willamette Valley may experience lighter rainfall due to rain shadowing, with accumulations expected to range from 0.40 to 0.60 inches. Wind speeds in the inland valleys could reach approximately 30 miles per hour.
Impact:
• Portland is expected to undergo a rainy and windy transition into winter as the first in a series of weather systems arrives on Thursday (04 December).
• Overnight precipitation may impede early-morning travel, reduce visibility, and affect time-sensitive outdoor operations.
• Wind gusts reaching 30 miles per hour in inland valleys could result in minor travel delays and localized service disruptions.
• Although lighter rainfall is anticipated in the Willamette Valley, early-morning activities and business operations may still be affected.
Recommendations:
It is advised to account for disruptions and consider monitoring the website of the National Weather Service (https://www.weather.gov/) for further updates.
Sources:
• https://www.oregonlive.com/weather/2025/12/overnight-rain-expected-in-portland-as-first-of-several-weather-systems-arrives.html
• https://www.weather.gov/
