Tropical Storm Dexter forms off the U.S. Coast
Tropical Storm Dexter formed northwest of Bermuda on August 4, 2025, as the fourth named Storm of the 2025 Atlantic hurricane season.
Satellite image of Tropical Storm Dexter at 16:00 UTC on August 4, 2025. Credit: NOAA/GOES-East, Zoom Earth, The Watchers
Tropical Storm Dexter formed over the western Atlantic at around 03:00 UTC on August 4 (11:00 AST on August 3), according to the National Hurricane Center (NHC).
At 15:00 UTC (11:00 AST) on August 4, Dexter’s center was located approximately 400 km (250 miles) northwest of Bermuda. It had maximum sustained winds of 75 km/h (45 mph) with higher gusts and was moving NE at 22 km/h (14 mph) with minimum central pressure of 1 002 hPa.
Tropical-storm-force winds were extending up to 165 km (105 miles) from the center.
Dexter remains a weak tropical storm, affected by moderate vertical wind shear. Satellite imagery shows its low-level center is partially exposed.
Forecast models suggest Dexter will continue moving toward the north-northeast over the next several days. While some short-term intensification is possible, environmental conditions, particularly increasing wind shear and dry air, are expected to limit significant strengthening.
There is a low probability of the system gaining additional strength through interaction with an upper-level trough. However, most numerical models do not support this scenario.
Dexter is the fourth named storm of the 2025 Atlantic hurricane season. According to the NHC’s forecast track, the system is expected to remain over the open ocean, passing north of Bermuda and away from the U.S. East Coast.
Rishav Kothari is Editor-in-Chief of The Watchers, where he runs the newsroom and covers earthquakes, volcanoes, severe weather and space weather.
