Could Hurricane Polo be a Category 6?
Officially, absolutely not. But after Polo exploded into one of the most intense hurricanes ever measured in the eastern Pacific, the question doesn’t sound quite as ridiculous as it normally would.
Polo peaked Tuesday at 180 mph sustained winds and a central pressure of 892 millibars, according to NOAA Hurricane Hunters. That pressure made it the second-most intense eastern Pacific hurricane on record, similar in scale only to Hurricane Patricia’s staggering 872 mb in 2015. By Thursday morning, Polo had fluctuated between Categories 4 and 5 and was listed at 155 mph by the National Hurricane Center.
Category 5 begins at 157 mph. There is no official Category 6; everything above that threshold remains a five. That’s the point raised by independent forecasters now arguing that storms like Polo are beginning to stretch the usefulness of the current scale.
Scientists have actually explored that idea. In 2024, researchers Michael Wehner and James Kossin proposed a hypothetical Category 6 beginning above 192 mph, arguing that an open-ended Category 5 may inadequately distinguish the most extreme modern tropical cyclones. Under that proposal, Polo’s 180-mph peak still falls short — but not by much.
Related: Category 5 Hurricane Polo Explodes Into One of the Strongest Pacific Storms Ever
Polo’s intensification was nearly unprecedented. Its winds increased 110 mph in 24 hours, just 10 mph shy of Patricia’s world-record jump. NHC forecaster Eric Blake wrote before the explosion that one rapid-intensification model was showing probabilities “as high as I have ever seen.”
NOAA has called Polo an “extremely dangerous” hurricane. Peak seas reached roughly 46 feet, while heavy rain, flooding, mudslides and destructive surf have threatened Mexico.
What About Southern California?
For now, forecasters are more cautious. The NHC says Polo-generated swells will spread toward Baja California Sur, bringing dangerous surf and coastal flooding there. Surfline says Southern California swell will “probably be limited” and could even miss the region depending on Polo’s track.
Even if Polo’s core remains offshore, its immense size guarantees severe impacts for the West Coast. Much like previous hurricanes this season, Polo is generating colossal ocean displacement. As the storm tracks north toward the Baja Peninsula, it threatens to send massive, destructive groundswells straight into Southern California.
With forecasters predicting 10- to 15-foot waves and life-threatening rip currents, the coastal damage potential is massive. Local beaches and low-lying coastal communities must brace for severe flooding, accelerated cliff erosion, and dangerous surges as this historic, near-Category 6 superstorm makes its presence felt.
But after Hurricane Marie already battered an eroded Southern California coastline this season, Polo is another storm worth watching closely.
Officially, Category 5 is as high as it gets. And Polo is a reminder of just how enormous that category can be. Perhaps it’s time to adjust the scales? TBD.
We’ll leave that to the scientists.
Related: Hurricane Polo Could Send Another Big Swell Toward Southern California
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