December 21, 2024 Saturday Winter Weather

Watching pattern flip and next major Arctic blast into early January

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Good Saturday Evening and officially Winter 2024-2025!

Canadian Arctic High Pressure settles into the Northeast with very cold temperatures into Sunday morning. A storm system in the Midwest will eventually push warm air up and over that cold dome leading to light freezing rain in North Dakota and Minnesota as temperatures warm up significantly.

The West Coast will be bombarded by a series of storms and atmospheric rivers every day or two for the next 10-days.

Weather on Sunday

Precipitation Type and MSLP Next 6-days

Another Clipper system for Tuesday and Wednesday will drop a few inches of snow across the Great Lakes and maybe across the Northeast, but this storm looks less robust than the snowmaker that blanketed New Jersey, NYC, into Boston this morning.

After Christmas, a storm system (all heavy rain) in the ECMWF HRES 12z model in the central Mississippi River valley.

Snow Depth for Christmas Morning

Monitoring the snow cover for Santa Claus on Tuesday and Wednesday. Temperatures won’t be warming much above freezing in the Great Lakes and Northeast until Tuesday afternoon, so any snow that is on the ground might stick around on grassy surfaces or in the shade.

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Pattern Flip — Eventually — Into January 2025