September 24, 2025 Wednesday Morning Update
Watching two tropical waves with high chance of (slow) development
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.
Two areas of interest: Invest 94L in NE Caribbean and Invest 93L to the east in the central Atlantic — both are not well organized and development (HIGH chance) is expected to be slow.
Current thinking: Invest 93L will be named first ( Humberto ) and develop (perhaps rapidly intensify) into a Major Hurricane. It will be larger and more intense and control the twin cyclone system.
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.
Read the full piece →- Milepost
- 744 · laid 2025-09-24T13:01:33.187000Z
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