Forecasters say small riverside towns in Washington state and areas of Portland, Ore., are under a flood threat as storms expecting to dump up to 6 inches of rain in a day move across the Pacific Northwest.
Portland officials warned residents in flood-prone areas such as the Johnson Creek watershed to be prepared to evacuate. The tributary empties in the Willamette River about six miles south of downtown Portland.
The National Weather Service also expects the Chahalis, Snohomish and Snoqualmie rivers in Washington state to reach flood stage. Forecasters say flooding is likely to be widespread.
They say the threat of floods there is greater than in Oregon, where some coastal streams and other Willamette tributaries could top over their banks.