Zion National Park warns public about flash floods during monsoon season

ZION, Utah (ABC4) — Zion National Park Service (NPS) reminds visitors that monsoon season is underway and that visitors should remain prepared for flash floods.

Zion NPS says that monsoon season is brought on by seasonal wind direction shifts, which increases the amount of precipitation in the area. Typically, monsoon season lasts between July and mid-September and brings more afternoon storms.

During monsoon season, Zion Canyon visitors can expect to see waterfalls in the canyon walls, but are also more likely to experience flash floods, which can be incredibly dangerous. Zion NPS notes that “flash floods are powerful, hard to predict, and can be damaging very quickly”

Anyone who is planning to visit Zion National Park should become familiar with flooding potential and the flash flood rating system.

Flooding potential

There are several warning signs that indicate that a flash flood may be on the way. The Visitor Center at Zion NPS will have up to date information on the weather and flash flood risk.

Additionally, visitors should stay up to date on weather warnings and be wary of areas that are likely to flood, such as slot canyons. However, a flash flood can occur, even in clear skies. Visitors should always make sure somebody else knows where they are going and how long they plan to be there.

They should also be aware of impending flash floods, by keeping an eye on water conditions. The Zion National Park Service notes that changes in water conditions may show by:

• Surge in water
• Change in water color
• Roaring water sound
• Increased debris in the water

Flash Flood Rating System

The National Weather Service also has a flash flood potential rating system that informs visitors on how likely a flash flood is:

Not Expected: Flash flooding is not expected. Your safety is your responsibility.
Possible: Some slot canyons, dry washes, and small streams may
experience flash flooding.
Probable: Some slot canyons, dry washes, and small streams are
expected to experience flash flooding.
Expected: Many slot canyons, dry washes, and small streams are
expected to experience flash flooding.

Courtesy: Zion National Park via Facebook

Most National parks in Utah currently have ‘not expected’ and ‘possible’ flash flood ratings, according to the National Weather Service.

During a Flash Flood

During a flash flood, as little as six inches of water can knock an adult or child off of their feet, making it important to act quickly at the first sign of a flash flood.

If caught in a flash flood and unable to exit the park safely, visitors should stay out of the water at all times. They should also head for higher ground immediately, without trying to pack up gear.

Flash flood waters can take hours to recede, according to Zion NPS. Visitors should be patient and remain on high ground, while they wait.

“At the end of the day,” Zion National Park says, “safety is your responsibility. Recreate safely!”