Guam Braces for 165-mph Super Typhoon Bavi as 30-Foot Waves Threaten Flooding

Q: As storms like Bavi exceed known limits, is it time for scientists to introduce a 'Category 6' for hurricanes?

Probably not as a standalone fix, though the case for it is getting stronger as storms like Bavi push deeper into the top end of Category 5. The argument for a Category 6 is straightforward: the Saffir-Simpson scale tops out at Category 5 for winds of 157 mph or higher, so it does not distinguish well between a 160 mph storm and one nearing 190 or 200 mph. Some scientists have proposed a new threshold around 193 mph, arguing that warmer oceans are increasing the odds of the most extreme cyclones. Research since the 1980s shows a rising share of storms reaching Category 3, 4 and 5, and climate science indicates human-caused warming is likely to raise peak wind speeds and rainfall rates further. But the National Hurricane Center has resisted adding Category 6. Its view is that Category 5 already signals catastrophic damage and the highest level of public action. In practical terms, emergency managers would still tell people to evacuate or shelter as if facing the worst-case storm. A new label might add drama without changing decisions. The bigger problem is that the current scale measures only wind. Storm surge, inland flooding and extreme rainfall often cause more deaths and destruction than wind alone. That matters for Guam, where Bavi threatens not just violent winds but also 5 to 10 inches of rain, major flooding and waves up to 30 feet. So the stronger scientific case may be not simply for Category 6, but for a broader hazard scale that better captures total storm risk.

3 articles · Updated · abcnews.com · Jul 3

Super Typhoon Bavi could pass Guam and the Northern Mariana Islands with winds near 165 mph late Sunday into Monday local time, bringing a Category 5-equivalent threat to the U.S. territory.
Bavi was packing 145 mph winds Friday morning ET, and forecasters said sustained winds could intensify to 175 mph by Saturday afternoon local time before the storm nears the islands.
Five to 10 inches of rain are forecast from Sunday morning through Wednesday afternoon, while waves could reach 30 feet and trigger major flooding.
The National Weather Service urged Guam residents to secure homes, monitor warnings and prepare to evacuate if conditions worsen.

Sources

abcnews.com13h ago

Guam Braces for Super Typhoon Bavi, Category 5 Hurricane Threat

The Watchers13h ago

Typhoon Bavi forecast to approach the Mariana Islands as a Category 5 super typhoon - The Watchers

Good Morning America13h ago

Guam braces for Super Typhoon Bavi, which may hit at Category 5 hurricane strength - Good Morning America

9 Sources

As storms like Bavi exceed known limits, is it time for scientists to introduce a 'Category 6' for hurricanes?

Hitting just months after another disaster, how will this super typhoon test the limits of U.S. aid for its remote territories?

Super Typhoon Bavi Nears Mariana Islands: Historic 200 mph Storm Spurs Emergency Response and Climate Concerns

Overview

Super Typhoon Bavi is rapidly intensifying and poses a severe threat to the Mariana Islands, including Saipan, Tinian, Rota, and Guam. As of July 3, 2026, Bavi is nearing its maximum potential intensity, projected at 200 mph winds and a central pressure of 880 mb. However, an expected eyewall replacement cycle in the next two days will likely interrupt its strengthening and prevent it from reaching its absolute peak. Despite this, Bavi remains extremely dangerous, and residents are urged to complete all preparations quickly, as the storm’s approach will bring life-threatening conditions to the region.

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