The Servicio Meteorológico Nacional (SMN) is monitoring a developing low-pressure system off the coast of Michoacán that is expected to become the second tropical cyclone of the 2026 season, named “Boris.” As of Saturday, June 6, 2026, the system holds a 70% probability of cyclonic development, threatening to bring heavy rainfall, strong winds, and high surf to western Mexico.
The Path and Status of Tropical Cyclone Boris
The low-pressure system is currently located 300 kilometers south-southwest of Lázaro Cárdenas, Michoacán. According to the SMN, the system is moving north and is expected to reach tropical cyclone status over the weekend. The 70% probability of development remains consistent for both the 48-hour and 7-day outlooks, indicating a rapid evolution that has triggered alerts for the states of Michoacán and Jalisco.
Potential Impacts on Western Mexico
Residents in Jalisco, Michoacán, and Colima are advised to prepare for a significant shift in weather conditions. The SMN warns of heavy to very heavy rainfall, which carries the risk of flooding in low-lying areas, the overflow of rivers and streams, and potential landslides. Additionally, strong wind gusts could impact infrastructure by downing trees and advertising signs, while maritime navigation is urged to take precautions due to elevated sea swells.
Did You Know? The system currently being monitored as the potential “Boris” is the first tropical cyclone of the 2026 season with the potential to impact Mexican territory.
Monitoring a Second System in the South
Beyond the threat to the western coast, the SMN is tracking a second low-pressure zone near the border of Guatemala and El Salvador. This system is located 535 kilometers southeast of the mouth of the Suchiate River. It is currently moving slowly toward the north and carries a 50% chance of cyclonic development within 48 hours, rising to 60% over the next week. Authorities continue to monitor this system to determine if it poses any direct risk to the Mexican border region.
Expert Insight: The dual-threat scenario presented by these two systems highlights the necessity of localized preparedness. While one system is moving toward the western coast, the simultaneous monitoring of the southern border reflects a proactive stance by the SMN to mitigate the risks of flooding and structural damage in regions that could be affected by rapid meteorological changes.
Frequently Asked Questions
What is the probability that the system near Michoacán will become a cyclone?
The SMN reports a 70% probability of cyclonic development for the system located south of Michoacán and Guerrero within the next 48 hours and the next 7 days.
Which states are currently on alert for the potential formation of Boris?
The states of Michoacán and Jalisco are currently in the projected path of the system, with Colima also included in the warning for potential heavy rains and wind.
Is there another weather system being tracked by the SMN?
Yes, the SMN is monitoring a second low-pressure zone located 535 kilometers southeast of the mouth of the Suchiate River, which has a 60% probability of development over the next 7 days.
How are you preparing your household for potential severe weather this weekend?
