National Weather Service United States Department of Commerce

Back-to-Back Pacific Storms to Impact the West Coast; Heavy Snow in the Central Appalachians

Back-to-back powerful Pacific storm systems to impact the Pacific Northwest and northern California through the end of this week with heavy rain, flooding, strong winds, and higher elevation mountain snow. A strong, long-duration atmospheric river will accompany the Pacific storms, bringing excessive rainfall and flash flooding to southwest Oregon and northwest California through the week. Read More >

A low pressure system is set to strengthen as it travels over the northern plains Tuesday night, and could result in areas of severe thunderstorms capable of producing large hail and damaging winds by early Tuesday evening and on through the overnight hours. An isolated tornado threat also exists.

Currently, if thunderstorms develop, they are timed to move into central and north central South Dakota Tuesday late afternoon/early evening and spread east to the border with Minnesota early Wednesday morning.