Hurricane Cosme was an unusually large tropical cyclone that made landfall in south-western Mexico in June 1989.

In early June 1989, a tropical wave emerged from the west coast of Africa and traversed the Atlantic Ocean, eventually crossing into the eastern North Pacific.

[5] As the cyclone approached the coast of Mexico, it reached maximum sustained winds of 85 mph (140 km/h) and a minimum barometric pressure of 979 mbar (28.91 inHg).

[2] It trekked northward through eastern Mexico and further diminished into a tropical depression before becoming indistinguishable south of Brownsville, Texas on June 23.

Tropical Storm Allison's development in the Gulf of Mexico was partially related to residual conditions from Cosme's remnants.

[8] High winds produced by the storm damaged numerous trees and power lines throughout the affected areas.