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TheForecast Post

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

Weather Trader Tropics MILEPOST 697

August 9, 2025 Watching Major Tropical Wave

Saturday: tropical wave in far Eastern Atlantic with potential U.S. impacts in 10-14 days

What the month did

August 2025 was the 28th-warmest August in the 132-year national record (1895–2026), at 73.4°F against a 1991–2020 normal of 73.1°F (+0.3°F).

August 2025 was the 27th-driest August in the 132-year national record (1895–2026), at 2.3in against a 1991–2020 normal of 2.7in (-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.

Central Atlantic MDR (20%) tough sledding for a central Atlantic tropical wave with less potential to develop in coming days as it heads north

Major tropical wave coming off Africa at low latitude will adjust northward into the monsoon trough. Initial development should be slow but much more favorable environment lies ahead in central MDR.

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Milepost
697 · laid 2025-08-09T15:17:57.031000Z
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https://weather.substack.com/p/august-9-2025-watching-major-tropical
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