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TheForecast Post

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

Weather Trader Notebook MILEPOST 414

Oct 14, 2024 Monday Weather Update

Invest 94L struggling with dry air. Arctic blast descends upon eastern U.S.

What the month did

October 2024 was the 2nd-warmest October in the 131-year national record (1895–2025), at 58.9°F against a 1991–2020 normal of 54.5°F (+4.4°F).

October 2024 was the 3rd-driest October in the 131-year national record (1895–2025), at 1.0in against a 1991–2020 normal of 2.5in (-1.5in).

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.

A taste of fall or maybe even winter into the mid-South as a lobe of the polar vortex rotates through the Great Lakes into the Southeast over the next few days. However, the cold air will be quickly replaced by southerly flow and high pressure ridging. This remains a dry pattern for the much of the Lower 48.

Favorite Winter Map Animation is dynamic tropopause potential temperature. This highlights the location of various weather features like fronts, troughs, and ridges by colorizing the temperature near the jet stream level.

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
414 · laid 2024-10-15T02:05:58.987000Z
Source
https://weather.substack.com/p/oct-14-2024-monday-weather-update
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