Atmospheric River in the Pacific Northwest and Northern Rockies this Weekend

A Pacific storm and atmospheric river will impact the Pacific Northwest states and northern Rockies this weekend, bringing locally heavy low elevations rain and heavy high elevation snow in the mountains. By Sunday over the Interior Northwest, rain combined with snowmelt will increase the risk of flood hazards. Flood Watches are in effect. Read More >

December 1, 2006
High Winds

A vigorous area of low pressure produced high winds across the region.

Environment

Radar reflectivity image shows squall line tearing through the Tri State.	Double-barrelled low pressure (solid blue lines) lifting north into the Great Lakes produced high winds across the region. The low was supported by a deep 500mb low (yellow dashed lines) tracking through Illinois.	Visible satellite image shows swirl of clouds associated with intense low pressure. Surface observations show widespread high winds, as well as heavy snow over Illinois.