Tropical Storm Alvin forms off the southern coast of Mexico
Tropical Storm Alvin, the first named storm of the 2025 eastern Pacific hurricane season, formed off the southern coast of Mexico on May 29. Forecasts indicate it will dissipate by the end of the week without making landfall.
Satellite image of Tropical Storm Alvin at 15:10 UTC on May 29, 2025. Credit: NOAA/GOES-East, RAMMB/CIRA, The Watchers
Tropical Storm Alvin formed off the southern coast of Mexico at 15:00 UTC on May 29, becoming the first tropical storm of the 2025 eastern Pacific hurricane season.
As of 08:00 MST (15:00 UTC) on May 29, the system was located approximately 1 080 km (670 miles) south-southeast of the southern tip of Baja California, with a minimum central pressure of 1 005 hPa.
Ten-minute sustained winds near the center reached approximately 65 km/h (40 mph), with higher gusts. Tropical-storm-force winds extended about 72 km (45 miles) outward from the center.
Convection burbles within Tropical Storm Alvin over the Pacific Ocean.
— CIRA (@CIRA_CSU) May 29, 2025
Alvin is the first named storm of the eastern Pacific hurricane season. pic.twitter.com/RzaiZOncZI
The storm is forecast to strengthen through the night of May 29 but weaken late on May 30 as it moves into a drier environment with increasing wind shear.
The system is expected to continue moving northwestward through May 29 and turn northward on May 30 under the influence of a mid-level cut-off low.
The system is forecast to weaken into a tropical low before approaching the Baja California Peninsula. It is expected to become post-tropical by May 31 and dissipate by the end of the week.
Based on the latest track and size forecasts, tropical-storm-force winds are not expected to affect the coasts of mainland Mexico or the Baja California Peninsula.
I am an Assistant Editor and Severe Weather & Science Journalist at The Watchers, specializing in real-time severe weather coverage, geophysical event reporting, and research-driven scientific analysis. You can reach me at rishav(at)watchers(.)news.
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