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TheForecast Post

A chronicle of American weather and climate  ·  Wednesday, 16 September 2026

Weather Trader Notebook MILEPOST 466

December 20, 2024 Friday Evening Update

Clipper system outperformed morning forecasts

What the month did

December 2024 was the 4th-warmest December in the 131-year national record (1895–2025), at 38.1°F against a 1991–2020 normal of 34.3°F (+3.8°F).

December 2024 was the 64th-driest December in the 131-year national record (1895–2025), at 2.4in against a 1991–2020 normal of 2.5in (-0.1in).

NOAA/NCEI Climate at a Glance, contiguous United States. This is the observed record for the month, not a score of anything said in this piece — the forecast ledger begins 2026-08-17 and cannot reach earlier posts.

Friday Evening Headlines

Alberta Clipper —> offshore Gulf of Maine low pressure

For subscribers

The rest of this piece is for paid subscribers of Weather Trader. The Post keeps the archive, the index and the record; the writing itself stays behind the same subscription it was published under.

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Milepost
466 · laid 2024-12-21T03:04:38.876000Z
Source
https://weather.substack.com/p/december-20-2024-friday-evening-update
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