Meteorological history | |
---|---|
Formed | August 21, 2019 |
Remnant low | August 25, 2019 |
Dissipated | August 27, 2019 |
Tropical storm | |
1-minute sustained (SSHWS/NWS) | |
Highest winds | 70 mph (110 km/h) |
Lowest pressure | 990 mbar (hPa); 29.23 inHg |
Overall effects | |
Fatalities | 5 total |
Areas affected | Mexico |
IBTrACS / [1] | |
Part of the 2019 Pacific hurricane season |
Tropical Storm Ivo was a tropical cyclone that brought heavy rainfall to five states in Mexico, causing severe flooding during August 2019. The tenth tropical cyclone and ninth named storm of the 2019 Pacific hurricane season,[2] Ivo arose from a low-pressure area that spawned south of Guatemala on August 16. The low-pressure system gradually organized over the next several days as it tracked west-northwestward. The system coalesced into a tropical depression early on August 21 and strengthened into Tropical Storm Ivo several hours later. Located within a favorable environment of moist air and warm sea surface temperatures, the cyclone quickly intensified, peaking the next day with 1-minute maximum sustained winds of 70 mph (110 km/h) and a pressure of 990 mbar (29.23 inHg). Increasing wind shear caused the storm's intensification to level off later that day, as the system turned towards the north-northwest. Ivo passed by Clarion Island midday on August 23, generating winds of 60 mph (100 km/h) on the island. Wind shear caused Ivo to significantly degrade in structure and intensity during the next couple of days. Cold sea surface temperatures, as well as dry and stable air, caused the cyclone to degenerate into a remnant low early on August 25. The low meandered over the eastern Pacific before opening up into a trough of low pressure early on August 27.
Ivo prompted the issuance of blue alerts for multiple municipalities in Sinaloa and Sonora, signifying minimal danger. The Marine plan was activated in several states to prepare for heavy rainfall and flooding. Schools were canceled across over a dozen Sinaloan municipalities and at the Autonomous University of Sinaloa. Severe rainfall and flooding occurred, mostly across Baja California Sur and Sinaloa, forcing the evacuation of hundreds of people. Over a hundred shelters were established for victims of the storm. Hundreds of homes and streets were inundated by floodwaters and mud, as a result of torrential rainfall and multiple rivers overflowing. The rainfall worsened damage to infrastructure, roads, and bridges, which had been damaged during Hurricane Willa in 2018. At least 5 people were killed in Nayarit after being swept away by the El Cangrejo river. Heavy rainfall and hail occurred in Zacatecas, flooding two dozen businesses and homes and stranding nearly a dozen vehicles. Three landslides occurred in Mexico State, blocking streets and damaging houses. Three rivers spilled their banks, flooding several neighborhoods in the Mexico City suburbs. In the aftermath of the storm, Plan DN-III-E, a disaster relief and rescue plan, was activated in five states. Military troops assisted with rescue and cleanup operations in multiple states. Collection sites were opened to receive food and supplies for victims of the storm.
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