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TheForecast Post

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

Weather Trader Tropics MILEPOST 739

September 19, 2025 Friday Hurricane Season

Tropical Storm Gabrielle intensifying this evening

What the month did

September 2025 was the 7th-warmest September in the 131-year national record (1895–2025), at 67.9°F against a 1991–2020 normal of 66.0°F (+2.0°F).

September 2025 was the 15th-driest September in the 131-year national record (1895–2025), at 1.9in against a 1991–2020 normal of 2.6in (-0.6in).

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.

Not much to update this evening. Tropical Storm Gabrielle is well on the way to becoming a hurricane — and it turns out that it may reach Category 3 or major status after all.

Still some dry air in the vicinity from the upper-level trough hanging around, but the convection looks well aligned with light wind shear. All systems go for Gabrielle!

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Milepost
739 · laid 2025-09-20T00:39:23.801000Z
Source
https://weather.substack.com/p/september-19-2025-friday-hurricane
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