The National Weather Service has issued a new Hydrologic Outlook for potential flooding Thursday through Tuesday. Rainfall Tuesday night and Wednesday caused sharp rises on many rivers in Northwest Oregon, with a few rivers already approaching flood stage.
The next storm arrives Thursday evening and will move through the area by mid-day Friday bringing 1 to 3 inches of rain to the Central Coast, Coast Range and Cascades and up to an inch for inland for the Valley. On Saturday, expect another 1 to 2 inches of rain in the higher terrain and up to an inch in the Valley. For the Thursday and Saturday storms, most of the precipitation will fall as rain, with snow levels ranging from 4,000 to 7,000 feet.
Additional rain is forecast for Sunday night through Tuesday, with periods of heavy rain possible. However, the timing and amounts remain uncertain.
All of this wet weather will keep river levels high for the next several days, and minor flooding is possible for creeks and rivers, along with flood-prone intersections or roads in urban areas. Weather and river forecasts will be evaluated through the week.