Zion National Park Warns of Deadly Flash Flood Danger This Monsoon Season

Zion National Park is arguably one of the most stunning places in the U.S. It can also be one of the most dangerous during the monsoon season. Read on for more information about the dangers lurking this time of the year.

Monsoon Season Unleashes Hazards at Zion National Park

Nestled into the southwestern corner of Utah, Zion National Park is a popular tourist destination during the warm summer months. However, the park can also turn hazardous during the North American monsoon season that typically runs from July through September. During this time of the year, moisture flowing into the Desert Southwest from the Pacific supports the development of sudden afternoon thunderstorms packing torrential rain.

The National Park Service (NPS) is warning visitors to Zion to be extra vigilant about the rapidly developing monsoonal storms that can quickly flood the park's slot canyons. Compounding the danger is the fact that the storms can erupt 15 to 20 miles upstream from the most popular hiking areas in the park. This distance means that visitors may never feel or see the rain that ends up creating the flash flooding across the 288-square-mile watershed and into the Narrows.

It is also important to remember that clear blue skies in the morning do not mean that it will always stay that way. Even the most beautiful days can become deadly for hikers and outdoor recreationalists who are not aware of the hazard.

Dangers of Slot Canyons

The park's famous slot canyons are distinguished by their steep and narrow walls that allow little to no room to escape when they become flooded. The rainwater roars across the sandstone, funneling into the passages below and sending water levels climbing quickly.

In addition to the rapidly rising water, the flooding also often carries debris that is capable of striking and seriously wounding those in the path. One of the most tragic days in park history happened on September 14, 2015, when seven canyoneers lost their lives after a flash flood ripped through Keyhole Canyon.

Two hikers were killed after they were swept away in the Narrows when the Virgin River flooded in July 1998. A flash flood warning had been issued prior to this incident.

Most recently, a 29-year-old hiker was found dead three days after being swept off their feet during a flash flooding event in the Narrows in August of 2022.

NPS officials urge visitors to always check the weather forecast before visiting the park. Darkening skies and the sound of thunder are signs that a flash flooding event could unfold at any moment, making it important to seek higher ground immediately. Hiking earlier in the day is another good strategy, as most monsoonal storms hold off until later in the day.

Be sure to pay close attention to park closures. Visitors should pay heed to these closures and follow the direction of park officials.

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