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TheForecast Post

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

Weather Trader Tropics MILEPOST 385

Sept 6, 2024 Friday Tropical Update

Invest 90L next best chance at Francine next week

What the month did

September 2024 was the 2nd-warmest September in the 131-year national record (1895–2025), at 68.6°F against a 1991–2020 normal of 66.0°F (+2.7°F).

September 2024 was the 44th-driest September in the 131-year national record (1895–2025), at 2.3in against a 1991–2020 normal of 2.6in (-0.3in).

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.

Atlantic tropics remain [historically] quiet overall. Only show in town in Invest 90L soon to be developing in the southern Gulf of Mexico with 50% chance of becoming a named storm (Francine). The system will linger / meander for a few days before moving north either into Texas or Louisiana as a huge rainmaker.

Typhoon Yagi to landfall Vietnam at Category 4 after clipping Hainan island at even higher intensity, perhaps 140-knots (Category 5)

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Milepost
385 · laid 2024-09-07T02:05:21.925000Z
Source
https://weather.substack.com/p/sept-6-2024-friday-tropical-update
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