Clipper to Impact the Great Lakes and Northeast with Blast of Winter Weather

A strengthening clipper storm will shift across southeastern Canada Wednesday and Thursday with a arctic cold front crossing the Great Lakes and Northeast which will produce intense bursts of snow and gusty winds. Localized short-duration blizzard conditions will be possible with several feet of additional lake effect snow in the Great Lakes. Dry and warm conditions are expected in the West. Read More >

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Last Map Update: Tue, Dec 3, 2024 at 10:22:24 pm PST

Watches, Warnings & Advisories

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Freezing Fog Advisory

Air Stagnation Advisory

Air Stagnation

High pressure will build over the region through at least Dec 4th with strong valley inversions. This will support light winds and limited vertical mixing beneath the inversions. As a result, we expect air stagnation and possible deteriorating air quality. In terms of temperatures, nights will be cold, and days will be seasonable, except where the clouds/fog stays around all day (it will remain cold).