December 13, 2024 Friday Evening

More certain about Canadian Arctic blast next weekend

Weather on Saturday

Nearly 1050 mb High Pressure builds over the Northeast giving barometers quite a workout. Moisture behind the high out of the Gulf of Mexico rises over the cold Arctic pool and precipitation as freezing rain looks quite likely across Iowa into Saturday morning.

Heavy rainfall and mountain snow continues across California from a 975 mb storm system near the Washington coastline. Precipitation Type + MSLP Saturday morning:

Next 18-hours through Saturday noon

Heaviest freezing rain across eastern Iowa could exceed 1-inch.

Here’s the sprawling 1050 mb high pressure cell!

Days 6-10 Temperature Anomaly at 850 mb | ECMWF 12z

Canadian Arctic air plunges into the Midwest, Great Lakes, and Southeast for a period of 5-days centered on next weekend.

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