"Atmospheric River" to pound Pacific Northwest with more heavy rain

(Seattle, WA) -- Another round of drenching rain is moving into the Pacific Northwest Thursday, and will hang around through Friday.  

Forecasters say an "atmospheric river" will slam the region, pouring out as much as a month's worth of heavy rain. Flash floods are most likely in urban areas, roads, and small streams in Washington and Oregon.  

The flood threat could push into Olympia, Tacoma, and Seattle.