SATURDAY, OCTOBER 10, 2026
Hurricane Simon spent Saturday doing the one thing you never want a hurricane to do this close to shore: getting stronger. The storm reached Category 4 intensity with maximum sustained winds of 150 mph and a minimum central pressure of 938 millibars, according to the National Hurricane Center’s Saturday morning advisories — and it was sitting just 115 to 120 miles south-southwest of Manzanillo, Mexico, barely moving. Landfall is expected late Saturday or early Sunday, and the next 24 hours will decide how bad this gets.
Start with what makes Simon especially dangerous: its size, or lack of it. The NHC has repeatedly noted the storm’s small, intense inner core — the kind of compact structure that can spin up fast when conditions are favorable, and they are: low shear, very warm water, deep moisture. Simon went through rapid intensification Friday into Saturday, and the NHC’s forecast hedges toward the high end of the guidance. Some additional strengthening is still possible before landfall — the storm could flirt with Category 5 intensity at 155 mph — though some weakening is expected as it nears the coast. The bottom line from the forecasters: expect a major hurricane at landfall.
Where and when
The official forecast brings Simon ashore between Manzanillo — Mexico’s largest Pacific port — and the resort city of Puerto Vallarta, late Saturday or during the day Sunday. But there’s real uncertainty, and it cuts both ways. Simon is drifting north at only about 5 mph in very light steering currents, and the computer models disagree on how fast it moves over the next day or two. A track slightly offshore wouldn’t be good news — it would prolong destructive winds, storm surge and flooding along the coast rather than ending them quickly with an inland track over the mountains.
A hurricane warning covers the coast from Punta San Telmo to El Roblito, plus the Islas Marías archipelago offshore. A tropical storm watch extends farther south toward Lázaro Cárdenas. The NHC’s message to residents in the warning area has been blunt: rush preparations to completion. Tropical-storm-force winds arrive well before the center does.
Water is the killer
Everyone talks about the wind number. Emergency managers lose sleep over the rain. The NHC expects 10 to 20 inches of rain across portions of southwestern Mexico through Sunday, with isolated totals up to 30 inches possible in parts of Michoacán, Colima and Jalisco — and Nayarit in the crosshairs too. This is steep, mountainous terrain, exactly the kind that turns extreme rainfall into flash flooding and mudslides that wash out roads and cut off communities. Mexican authorities have warned of heavy rainfall in Guerrero, Michoacán, Colima and Jalisco.
“Simon has strengthened incredibly quickly, and that’s what makes storms like this so dangerous,” AccuWeather meteorologist Dan Pydynowski told Reuters. “Strong winds could damage homes and businesses, while flooding and mudslides could wash out roads and make it difficult for emergency crews to reach some communities. Even after the storm passes, power outages and damaged infrastructure could make recovery challenging.”
On the ground, preparations accelerated Saturday. The Associated Press reported that authorities in Jalisco suspended classes in 22 municipalities and began evacuating vulnerable areas. Residents are being urged to follow Mexico’s civil protection agencies and the latest NHC advisories — not yesterday’s forecast, because with a storm this compact, the forecast can change fast.
The bond market is watching too
There’s a second drama playing out far from the coast. Mexico’s catastrophe bond — the IBRD parametric deal — is on watch, with analysts at artemis.bm noting that a landfall central pressure around 932 millibars or lower inside the bond’s parametric box could trigger a payout. Simon was at 938 mb Saturday morning and still possibly deepening. Whether it gets there depends on exactly how much it intensifies today and how much it weakens before crossing into the box — something that may not be known until near landfall itself. An Air Force reconnaissance aircraft was scheduled to investigate the storm Saturday for more precise readings.
Zoom out and Simon is also a history-maker: the storm is likely to push the Northeast Pacific basin past its most active hurricane season since records began in 1949. That’s the backdrop nobody asked for — a record season, a compact rapid intensifier, and a coastline full of cities and ports directly in the cone.
What to watch next
Three things. First, the recon data — the actual pressure readings will sharpen the landfall intensity forecast and the cat-bond math. Second, the track wobbles: every jog east or west moves the worst of the wind and surge between Manzanillo and Puerto Vallarta, two very different coastlines. Third, the rain totals in the mountains of Michoacán, Colima and Jalisco, where the difference between 15 inches and 30 inches is the difference between a bad flood and a catastrophe. Simon is done strengthening in the abstract. What it does in the next 24 hours is all that matters now.
~115-120 mi SSW of Manzanillo; moving N at ~5 mph. 10-20 inches; isolated 30 inches in Michoacán, Colima, Jalisco, Nayarit; flash flooding/mudslides.
