Tropical Storm Mario (2025)

Tropical Storm Mario was a strong tropical storm that brought heavy rainfall to Mexico and the Southwestern United States. The fifteenth named storm of the 2025 Pacific hurricane season, Mario developed from a tropical wave that entered the Pacific on September 8. The tropical wave gradually organized over the next couple days, and would coalesce into a tropical depression on September 10 offshore Guerrero. The storm moved slowly, eventually strengthening into a tropical storm on September 12. Thereafter, it tracked near the coast to Mexico, before a developing low-pressure area caused Mario to degenerate to a remnant low on September 13. Mario regenerated back to a tropical storm the following day as it moved slowly northwestward, reaching its peak intensity on September 15 with wind speeds of 65 mph (100 kmh) and a minimum central pressure of 994 mbar. Mario weakened over the next day and degenerated back into a remnant low before fully dissipating on September 18.

Mario caused flash flooding in several Mexican States. In Michoacán several homes were damaged due to flooding and cars, motorcycles and pets were washed away. In Guerrero heavy flooding was reported. . In Baja California Sur, homes, vehicles and infrastructure were damaged by flooding, and one man was killed by lightning associated with the storm. Mario also contributed to moisture that caused flash flooding in the Southwestern United States, with widespread reports of over a half inch of rain. In addition, a toddler was killed after being swept away in a vehicle. All told, 2 fatalities occurred in relation to Mario, and the storm caused $40.7 million in financial losses.