Significant and Catastrophic Flooding in the Pacific Northwest; Very Cold Temperatures in the Northern Plains

The atmospheric river over the Pacific Northwest will begin to subside today, but lingering rainfall will exacerbate ongoing catastrophic major river flooding, and landslides will continue across portions of western Washington and northwest Oregon for several days. Arctic air will plummet southward into the Northern Plains today, bringing cold air in the single digits to the region by Friday. Read More >

Overview

A dry line tracked east across the Missouri Ozarks during the afternoon hours on Saturday April 30th, 2016. Clearing during the afternoon ahead of the dry line allowed for surface based instability to develop. As the dry line edged into this area of instability, severe thunderstorms developed producing large hail over portions of the eastern Ozarks.