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TheForecast Post

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

Weather Trader Tropics MILEPOST 309

June 13, 2024 Tropical Update: Invest 90L remains disorganized

Higher chance of development in southern Gulf of Mexico early next week

What the month did

June 2024 was the 2nd-warmest June in the 132-year national record (1895–2026), at 71.8°F against a 1991–2020 normal of 69.5°F (+2.3°F).

June 2024 was the 41st-driest June in the 132-year national record (1895–2026), at 2.8in against a 1991–2020 normal of 3.1in (-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.

Invest 90L has not become better organized at all. The showers and storms are in clusters but the central pressure has not dropped as predicted yesterday by the global modeling. The NHC maintains a 20% chance of development in the next 48-hours, however, this system is not on the way to becoming Alberto. Strong wind shear is pushing the convection to the east of whatever center would develop — hostile environment typical of mid-June off the East Coast.

Wind Shear of 30-50 knots is directly impacting Invest 90L

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Milepost
309 · laid 2024-06-13T15:42:15.280000Z
Source
https://weather.substack.com/p/june-13-2024-tropical-update-invest
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