How strong is Hurricane Simon?

Simon reached Category 4 on the Saffir-Simpson scale on 10 October, with maximum sustained winds of 150 mph (240 kph) and a central pressure around 932 millibars. Category 4 covers 130-156 mph and brings catastrophic damage — destroyed roofs, uprooted trees, weeks-long power outages. By 11 October winds were still 130-150 mph with the eye just offshore.

Which areas are under hurricane warning?

The warning covers the Pacific coast from Punta San Telmo to El Roblito, including the resort city of Puerto Vallarta, coastal Nayarit and the Islas Marías. Puerto Vallarta's airport suspended operations from 4 pm on 10 October, Manzanillo flights were cancelled, and the navy closed navigation at both Puerto Vallarta and Manzanillo ports.

What is rapid intensification and why is it dangerous?

Rapid intensification is when a hurricane's winds strengthen dramatically in a short time — typically 35 mph or more in 24 hours. It happens over very warm water with low wind shear and is hard to forecast, leaving coastal communities far less time to prepare. Simon's jump to Category 4 on 10 October is a textbook example.

What are the biggest dangers besides wind?

Forecasters warned of life-threatening storm surge, dangerous surf, and extreme rainfall — 50-100 mm widely, up to 200 mm in isolated spots, and cumulative totals reaching 750 mm in parts of Jalisco, Colima and Michoacán. On mountainous coastal terrain, that scale of rain causes flash flooding and mudslides, often the deadliest hazards in Pacific hurricanes.

What should people in the affected area do?

Follow Mexico's civil protection instructions, avoid all travel, stay away from flood-prone areas and never cross flooded roads. Tourists should shelter in place as directed by their hotels and monitor airline advisories, since airport operations are suspended. The storm was expected to linger near the coast into Monday-Tuesday, so conditions may remain dangerous well after the peak winds pass.

Hurricane Simon Category 4: Mexico Pacific Coast Threat

Hurricane Simon exploded into a Category 4 monster off Mexico's Pacific coast on 10 October 2026, its maximum sustained winds reaching 150 mph (240 kph) as it crawled slowly northward toward some of the country's best-known resort areas. With Puerto Vallarta's airport suspending operations, ports closed to navigation and forecasters warning of catastrophic winds, life-threatening storm surge and rainfall totals as high as 750 mm, Mexican authorities braced for what could be one of the most damaging Pacific hurricanes of the season.

By 11 October the storm's eye remained just offshore, still packing winds of 130 to 150 mph, and its slow movement meant a prolonged battering for coastal communities in Jalisco, Colima, Nayarit and Michoacán. The US National Hurricane Center (NHC) warned of heavy rainfall, dangerous surf and mudslides — and cautioned that Simon was expected to linger near the coast into Monday and Tuesday with its exact track still uncertain.

Background: how hurricanes are measured

Tropical cyclones are classified by the Saffir-Simpson Hurricane Wind Scale, which ranks storms from Category 1 to Category 5 based on maximum sustained wind speed. Category 4 covers 130 to 156 mph (209 to 251 kph) — winds capable of catastrophic damage: tearing roofs from well-built homes, snapping or uprooting most trees, knocking out power for weeks, and making affected areas uninhabitable for extended periods. Only Category 5 is higher.

What made Simon especially dangerous was rapid intensification — the process by which a storm's winds strengthen dramatically in a short period, typically defined as an increase of at least 35 mph in 24 hours. Rapid intensification is notoriously difficult to forecast and leaves coastal populations with far less time to prepare than a slow-building storm would. It tends to occur when a storm passes over very warm ocean water with low wind shear, conditions that have become more common as the oceans have warmed.

The eastern Pacific hurricane season runs from mid-May to the end of November, and October storms in this basin frequently threaten Mexico's Pacific coast. This year's exceptionally strong El Niño has been loading the dice toward more active and more intense tropical cyclones across the Pacific, and Simon arrived just days after Hurricane Isaias struck the US Gulf Coast — a reminder that both of North America's hurricane basins have been unusually violent in 2026.

What happened

On 10 October, Simon rapidly strengthened into a Category 4 hurricane roughly 115 miles (185 km) south-southwest of Manzanillo, with maximum sustained winds of 150 mph (240 kph) and a central pressure of around 932 millibars — an exceptionally low pressure that signals a powerful, well-organised storm. It was moving slowly to the north, a track that keeps the worst winds near the coast for longer.

Mexican authorities issued a hurricane warning stretching from Punta San Telmo to El Roblito — a swathe of coastline that includes the resort city of Puerto Vallarta, coastal areas of Nayarit and the Islas Marías archipelago. Hurricane warnings mean hurricane conditions are expected within the warning area, and they trigger the full machinery of civil protection: evacuations from the most exposed zones, shelter openings and the suspension of transport.

The disruption was immediate and wide-ranging. Puerto Vallarta's international airport suspended operations from 4 pm on 10 October; airlines cancelled all commercial flights at Manzanillo; Mexico's navy closed Puerto Vallarta and Manzanillo ports to navigation; and some hotels in Puerto Vallarta suspended weekend bookings as tourists were urged to shelter. For a region whose economy revolves around tourism, the timing — a weekend in peak season — could hardly have been worse.

On 11 October the eye remained just offshore, with winds still estimated at 130 to 150 mph — firmly in the major-hurricane range. The NHC's rainfall forecast was alarming: 50 to 100 mm widely, isolated falls up to 200 mm, and cumulative totals reaching as much as 750 mm in parts of Jalisco, Colima and Michoacán. Rainfall on that scale, falling on mountainous coastal terrain, brings a severe risk of flash flooding and mudslides — often the deadliest hazards in Pacific hurricanes, striking communities far from the strongest winds.

Why it matters

The danger from a storm like Simon comes in layers. The wind itself can destroy buildings and infrastructure outright; the storm surge — the dome of seawater pushed ashore by the hurricane — can inundate coastal areas with little warning; and the rainfall can trigger mudslides that bury roads and villages in the rugged Sierra Madre foothills behind the coast. The region has already faced natural-disaster scares this month, and emergency services were stretched before Simon arrived.

There is also the question of the slow forward speed. A fast-moving hurricane is violent but brief; a slow one like Simon grinds over the same coastline for hours or days, multiplying the wind damage and allowing rainfall totals to accumulate to catastrophic levels. Forecasters' uncertainty about the exact track compounds the problem: communities cannot know precisely where the worst conditions will land, forcing wider evacuations and precautionary shutdowns.

Economically, the impact extends well beyond the storm's footprint. Puerto Vallarta and the surrounding Riviera Nayarit are among Mexico's most important international tourism destinations; a major hurricane during the season can damage hotels and infrastructure, cancel thousands of trips and dent the region's reputation for months. Ports closed to navigation disrupt cargo as well as cruise schedules, and agricultural areas in Colima and Michoacán — key producers of limes, avocados and other crops — face flooding that can wipe out harvests.

Key facts

Storm: Hurricane Simon, Category 4 on the Saffir-Simpson scale (130-156 mph band).
10 October: Rapidly strengthened ~115 miles (185 km) south-southwest of Manzanillo; max sustained winds 150 mph (240 kph); central pressure ~932 mb; moving slowly north.
Warnings: Hurricane warning from Punta San Telmo to El Roblito, including Puerto Vallarta, coastal Nayarit and the Islas Marías.
Disruption: Puerto Vallarta airport suspended operations from 4 pm on 10 October; all commercial flights cancelled at Manzanillo; navy closed navigation at Puerto Vallarta and Manzanillo ports; some Puerto Vallarta hotels suspended weekend bookings.
Rainfall forecast: 50-100 mm widely, isolated 200 mm, cumulative totals up to 750 mm in parts of Jalisco, Colima and Michoacán — with life-threatening flash flooding and mudslides.
11 October: Eye remained just offshore with winds around 130-150 mph; storm expected to linger near the coast into Monday-Tuesday with uncertain track.
Context: Came days after Hurricane Isaias hit the US Gulf Coast; 2026's record-strong El Niño has favoured intense Pacific storms.

What happens next

The critical question is the track. If Simon's centre comes ashore, the landfall zone will bear the full force of the eyewall — the ring of most violent winds around the storm's centre — plus the highest surge. If it stays just offshore, the coast still endures days of battering surf, torrential rain and tropical-storm-force winds, but the worst-case wind damage is avoided. Either way, the rainfall threat is locked in: slow-moving major hurricanes reliably produce catastrophic flooding in Mexico's coastal mountains.

Residents and visitors in the warning area should follow the instructions of Mexico's civil protection authorities, avoid travel, stay clear of flood-prone areas and never attempt to cross flooded roads. Tourists in Puerto Vallarta and elsewhere should shelter in place as directed by hotels and monitor airline advisories — with airports suspended, rebooking will take time once operations resume.

Longer term, Simon is another data point in a punishing 2026 hurricane season on both sides of North America. As the storm finally moves on and the damage is surveyed, the focus will turn to recovery — restoring power and water, reopening ports and airports, and getting the tourism economy back on its feet before the winter high season. For now, though, the priority is survival: this is a storm to be respected, not ridden out casually.

Sources

Reporting drawn from Reuters, Associated Press (October 2026).

Hurricane Simon Becomes Category 4 Threat Off Mexico's Pacific Coast