Hurricane Simon Weakens to Category 1, but Sinaloa Flood Threat Grows and US Plains Face Storms.

by

The Hurricane Simon flood threat is doing what weakening storms often do — trading wind for water. Simon dropped to a Category 1 hurricane off Mexico’s Pacific coast on Tuesday, October 13, 2026, with maximum sustained winds around 93 mph (150 km/h) and gusts to 115 mph. That’s down sharply from its Category 4 peak on Sunday. But forecasters are more worried now than they were at the peak, because the real danger was never the wind. It’s the rain — and there’s a lot of it coming.

The storm’s center sat west of Cabo Corrientes, south-southwest of Mazatlan, barely moving as it drifted west-northwest. In its 5 a.m. Mountain Time advisory (Advisory 24), the National Hurricane Center warned that rainfall could reach 15 inches in parts of Sinaloa by Thursday — a staggering total that brings life-threatening flash floods and mudslides. A weaker hurricane that won’t move can be far more dangerous than a strong one that passes quickly.

Table of Contents

Hurricane Simon Flood Threat: What Mexico Is Facing

Mexico’s national weather service, the SMN, has warned of heavy to very heavy rainfall across Jalisco, Nayarit, Colima, and Sinaloa. These aren’t brief downpours. When a slow-moving tropical system parks itself near the coast, it can dump a month’s worth of rain in a couple of days, and the mountainous terrain of western Mexico turns that water into something deadly.

The biggest concern is Sinaloa. Fifteen inches of rain in the worst-hit areas would overwhelm rivers, flood low-lying neighborhoods, and trigger mudslides in the hills. Flash floods in this region don’t give much warning — dry creek beds become raging rivers in under an hour. Emergency officials in the affected states are urging residents in flood-prone areas to stay alert and be ready to move.

Canada has also weighed in, issuing an advisory urging its citizens to avoid non-essential travel to Mexico’s west-central coast, specifically from Punta San Telmo to Bahia Tempehuaya. When a foreign government issues that kind of warning, it’s a sign the situation is being taken seriously well beyond the storm’s immediate path.

The Airport That Just Reopened — and the Airlines Watching Closely

Puerto Vallarta’s airport reopened on October 13 after being shut down since October 10, when the storm first approached. Three days of closure is a long time for one of Mexico’s busiest tourist gateways, and the reopening is a relief for stranded travelers — though operations may still face disruptions if the weather deteriorates again.

The major U.S. carriers aren’t waiting to see. Delta, United, American, and Southwest have all issued travel waivers for the region, letting passengers change or cancel flights without the usual penalties. If you’re booked to fly into or out of the Puerto Vallarta area in the next few days, check your airline’s waiver policy before you head to the airport — and seriously consider whether the trip can wait.

This is the part of hurricane coverage that gets less attention than the dramatic satellite images but matters more to real people. Thousands of tourists are in the region right now. Resorts are built to handle storms, but flooded roads and canceled flights can strand visitors for days. The waivers are the airlines’ way of saying: don’t push it.

Simon’s Reach Extends to the American Plains

Here’s where the Hurricane Simon flood threat gets genuinely unusual. The storm’s tropical moisture is funneling north into the United States, and forecasters say some 40 million people from Texas to Illinois face a multiday severe-weather and flash-flood threat stretching through Thursday.

That’s not a typo — a hurricane off Mexico’s Pacific coast is about to make life miserable in the American Midwest. Tropical moisture doesn’t respect borders. When it collides with the weather systems already in place over the Plains, it supercharges them: heavier rain, stronger storms, more flooding. Fox Weather has described it as a multiday threat, and the ingredients are all there.

The risks vary by area. On Tuesday, the main concerns are large hail, damaging winds, and a low-end tornado risk. But the flash-flood threat may be the bigger story overall — tropical moisture means rain rates that can overwhelm drainage in a hurry, especially in areas that have already seen wet weather. Forty million people is roughly one in eight Americans sitting under this threat.

Why a Weaker Storm Can Be More Dangerous

There’s a stubborn myth that a hurricane’s category tells you how dangerous it is. Simon is demolishing that myth this week. At its Category 4 peak on Sunday, it was an impressive but offshore storm. Now, as a Category 1, it’s the one keeping forecasters up at night. The reason is speed — or the lack of it.

Fast-moving storms spread their rain over a wide area and move on. Slow movers like Simon sit in one place and wring out every drop of moisture. Fifteen inches in Sinaloa. Multiday flood threats in the Plains. That’s the signature of a storm that won’t leave, and it’s why the National Hurricane Center’s rainfall forecasts matter more than the wind speed right now.

History is full of storms that did their worst damage after weakening. The category number describes wind, full stop. It says nothing about rainfall, storm surge, or the flood threat that kills more people in most hurricanes than the wind does. Anyone judging Simon by its Category 1 label is making a dangerous mistake.

What to Watch in the Next 48 Hours

The critical window runs through Thursday. In Mexico, the question is how much of that 15-inch rainfall forecast actually materializes in Sinaloa, and whether the mudslide and flash-flood warnings turn into real emergencies. The NHC’s advisories will update through the week, and Mexico’s SMN warnings should be treated as mandatory reading for anyone in Jalisco, Nayarit, Colima, or Sinaloa.

In the U.S., the Plains and Midwest need to watch the severe-weather outlooks day by day. The threat shifts as the moisture moves — Tuesday’s tornado and hail risk may give way to a broader flash-flood problem by Wednesday and Thursday. Forty million people is a lot of territory, and not all of it will see the worst. But somewhere in that zone, somebody is going to get a very bad night.

The broader lesson from the Hurricane Simon flood threat is one forecasters repeat every season and nobody quite believes until it happens to them: the storm you stop watching is the one that gets you. Simon stopped being a Category 4 three days ago. It’s more dangerous now.

The Hurricane Simon flood threat shows why weakening storms demand more attention, not less — from Sinaloa’s 15 inches of rain to the Hurricane Simon flood threat facing 40 million Americans. As the Hurricane Simon flood threat evolves through Thursday, check NHC advisories before you travel.

Key Takeaways: Hurricane Simon Flood Threat

  • The Hurricane Simon flood threat brings up to 15 inches of rain to Sinaloa, Mexico, with life-threatening flash floods and mudslides through Thursday.
  • The Hurricane Simon flood threat extends to 40 million Americans from Texas to Illinois, as tropical moisture fuels a multiday severe-weather outbreak.
  • Puerto Vallarta’s airport has reopened, but the Hurricane Simon flood threat means travelers should check airline waivers — Delta, United, American, and Southwest all offer them.
  • Simon weakened from Category 4 to Category 1, but the Hurricane Simon flood threat proves that a slower, weaker storm can be more dangerous than a fast-moving major hurricane.

Sources and Resources

Frequently Asked Questions

Is Hurricane Simon still dangerous if it’s only Category 1?

Yes — arguably more dangerous than at its peak. Simon slowed to a crawl, which means it’s dumping enormous amounts of rain in one place instead of moving through. The NHC warns of up to 15 inches of rain in parts of Sinaloa by Thursday, with life-threatening flash floods and mudslides. The category only measures wind.

How does a Mexico hurricane threaten the US Plains?

Simon’s tropical moisture is streaming north into the United States, where it’s colliding with existing weather systems over the Plains and Midwest. That combination supercharges storms — heavier rain, stronger winds, more flooding. About 40 million people from Texas to Illinois face a multiday severe-weather and flash-flood threat through Thursday.

Is Puerto Vallarta airport open?

Yes, it reopened October 13 after being closed since October 10. But operations could still be disrupted if conditions worsen. Delta, United, American, and Southwest have all issued travel waivers for the region, so check with your airline before traveling — and consider postponing non-essential trips.

What areas of Mexico are under the heaviest rain warnings?

Mexico’s SMN has warned of heavy to very heavy rainfall in Jalisco, Nayarit, Colima, and especially Sinaloa, where the worst totals could reach 15 inches. Canada has advised against non-essential travel to the west-central coast from Punta San Telmo to Bahia Tempehuaya.

When will the threat pass?

The critical window runs through Thursday, October 15. Mexico’s heaviest rain should taper as Simon drifts and weakens further, while the U.S. Plains threat evolves from Tuesday’s tornado and hail risk into a broader flash-flood concern by Wednesday and Thursday. Keep checking NHC advisories for updates.

What is the Hurricane Simon flood threat?

The Hurricane Simon flood threat is the life-threatening flooding expected from up to 15 inches of rain in Sinaloa, Mexico, combined with the multiday severe-weather and flash-flood risk for 40 million Americans from Texas to Illinois as Simon’s tropical moisture streams north.

How long will the Hurricane Simon flood threat last?

The Hurricane Simon flood threat extends through Thursday, October 15. Mexico’s heaviest rain should ease as Simon drifts and weakens, while the U.S. Plains threat shifts from Tuesday’s tornado and hail risk to a broader flash-flood concern by Wednesday and Thursday.

Conclusion

The Hurricane Simon flood threat is a reminder that hurricanes are water stories first and wind stories second. A Category 1 storm that won’t move is dumping up to 15 inches of rain on Sinaloa while its moisture sets up a multiday severe-weather siege for 40 million Americans from Texas to Illinois. The satellite images looked scarier on Sunday. The forecast looks scarier now.

Through Thursday, the rules are simple: take the rainfall forecasts seriously, don’t drive through flooded roads, and check your airline’s waiver before flying anywhere near Mexico’s Pacific coast. Simon may be weakening. The danger isn’t.

Leave a Comment