Tropical Storm Alvin (2025)

Tropical Storm Alvin was a moderately strong tropical storm that brought heavy rain and strong winds to El Salvador and Mexico. The first named storm of the 2025 Pacific hurricane season, Alvin formed from a broad area of low pressure off the coast of southwestern Mexico. The disturbance began gradually organizing and became a tropical depression on May 28 and began slowly moving northwest. On May 29, the depression strengthened to a tropical storm while slowly turning to the north towards the Baja California peninsula. Later that day, the storm strengthened further and peaked with maximum sustained winds of 60 mph (100 km/h) and a minimum central pressure of 999 mbar (29.50 inHg). However, wind shear, dry air, and cooler sea surface temperatures halted further intensification. On May 30, the system began weakening after moving into a more unfavorable environment. On May 31, the storm degenerated to a remnant low and dissipated the next day, just southeast of the Baja California peninsula.

Alvin caused significant flooding in El Salvador, several Mexican states, and the Southwestern United States. Damage was the most severe in Chiapas and the State of Mexico, where numerous buildings, vehicles, and streets were inundated by floodwaters. At least 50 people were injured from the storm, with several of them being injured from traffic accidents caused by slippery roads. Additionally, numerous water-related rescues had to be made. Alvin also caused five fatalities: four in Mexico and one in the United States. The storm also caused more than US$986,000 in damage.