Tropical Storm Humberto forecast to become a major hurricane, Imelda shows signs of formation
Tropical Storm Humberto is forecast to strengthen into a major hurricane by the weekend, while tropical disturbance AL94 shows high chance of cyclonic development within 2 days from September 26, 2025.
Satellite image of Tropical Storm Humberto and Disturbance AL94 (Imelda) as of 20:20 UTC on September 26, 2025. Credit: NOAA/GOES-19, Zoom Earth, The Watchers
Tropical Storm Humberto is forecast to become a hurricane by September 27, as it continues to strengthen over the central Atlantic.
The storm was located about 748 km (465 miles) east-northeast of the northern Leeward Islands as of 11:00 AST (15:00 UTC) on September 26, 2025.
Maximum sustained winds near the center (averaged over 1 minute) reached 80 km/h (50 mph). It was moving northwestward at 13 km/h (8 mph), with an estimated minimum central pressure of 1 004 hPa. Tropical-storm-force winds extended up to 72 km (45 miles) from the center.
Humberto formed on September 24, and at the rate it is strengthening, it is forecast to become a major hurricane by the weekend.
Meanwhile, AL94, a tropical disturbance located near the islands of Hispaniola and the Turks and Caicos, has an 80% chance of formation in the next 48 hours and a 90% chance of developing into a tropical storm within the next 7 days.
Upon formation, it will be named Imelda. The forecast indicates that Imelda is likely to form near the Bahamas as early as the weekend.
While both these systems don’t pose any hazard to land as of September 26, the forecast for how these could affect islands around them, and the northeastern U.S., is expected to become clearer as more data becomes available.
References:
1 Tropical Storm Humberto advisory number 4 –NHC – September 26, 2025
2 Tropical Storm Humberto discussion number 4 – NHC – September 26, 2025
Rishav Kothari is Editor-in-Chief of The Watchers, where he runs the newsroom and covers earthquakes, volcanoes, severe weather and space weather.
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