Pacific Hurricane Season Surges Amidst Strong El Niño Conditions
Warmer ocean temperatures fuel an unusually active season with powerful storms, while the Atlantic remains quiet.
The Pacific Ocean is experiencing an intense hurricane season, driven by developing El Niño conditions that have warmed ocean waters and triggered a cascade of unusual weather events globally. Experts indicate this El Niño could be among the strongest on record, with implications extending into 2027.
The eastern Pacific has already seen more hurricanes than are typical for a full season. Hurricane Polo recently brought heavy rain to Mexico's Pacific coast, while Hawaii faces potential catastrophic flooding from Tropical Storm Nolo. These storms, fueled by El Niño, form farther west and tend to track westward over open ocean, a pattern observed in past strong El Niño years.
El Niño typically weakens or reverses low-level surface winds across the Pacific, altering the jet stream and contributing to record global heat, severe droughts, wildfires, and diminishing water supplies. While El Niño enhances hurricane activity in the Pacific, it conversely suppresses it in the Atlantic, which has been notably quiet this year.
Both the eastern and central Pacific have experienced four more tropical storms than average to date, with more than two months remaining in the season. Three Pacific hurricanes have reached Category 5 strength this year, matching a record set in 2002 during another strong El Niño. The most active eastern Pacific season on record was 1992 with 25 named storms, and 2015 was the most active for the central Pacific with 14.
Past strong El Niños have been linked to significant weather impacts, including deadly floods in China in 1998 and destructive storms in Mexico and the southwestern United States in 1997. Hawaii, in particular, has been hit hard this year, with two hurricanes causing substantial damage to homes and infrastructure. Forecasters anticipate Tropical Storm Nolo could bring rainfall measured in feet to the islands.
This year's relentless storm activity has led to what some meteorologists describe as a new kind of weariness in Hawaii, where communities are recovering from one event only to prepare for the next. Residents are increasingly aware of the risks and emphasize the importance of self-sufficiency and mutual support during these active weather periods.