UPDATED: Incoming storm bringing more flash flooding

Flash flood waters from the Brian Head burn scar rush down a drainage in Parowan, Utah, Aug. 6, 2017 | File photo courtesy Corey McNeil, Cedar City News / St. George News

ST. GEORGE — A rainstorm moving over Southern Utah Friday evening is producing flash flood conditions in some areas.


Bookmark this page for continuous updates about flash flood potential in Southern Utah Friday evening.

  • Update 9:45 p.m. Flooding has led to temporary road closures in Washington City.
  • Update 9:30 p.m. Flooding has been reported in the Hurricane Valley area.
  • Update 7:45 p.m. The National Weather Service has issued a flash flood warning for the eastern portion of Zion National Park.
  • Update 7:40 p.m. State Route 143 has reopened in Iron County, according to the Utah Department of Transportation.

Washington County

Washington City

Water in the street has led to the closure of potions of Main Street in Washington City.

Hurricane Valley

Flooding is reportedly occurring in parts of LaVerkin and Hurricane, including the Dixie Springs area along Sand Hollow Road.

Personnel from Hurricane Valley Fire District have been paged to their stations in anticipation of flooding.

Zion National Park

A flash flood warning is in effect in Washington County Friday, July 13, 2018 | Image courtesy of the National Weather Service, St. George News | Click on image to enlarge

A flash flood warning for is in effect for east-central Washington County until 10:30 p.m.

At 7:32 p.m. Friday, Doppler radar indicated a thunderstorm producing heavy rain over the eastern portion of Zion Nation Park. Flash flooding is expected to begin shortly along the north fork of the Virgin River, according to the National Weather Service.

Zion National Park, Springdale and Rockville are expected to experience flooding.

Iron County

Shaded area denotes region subject to flash flood warning in Iron County. Radar map generated at 5:15 p.m. MDT, July 13, 2018 | Image courtesy of the National Weather Service, St. George News

With nearly an inch of rain having fallen in a period of 30 minutes, flash flooding is occurring on the Brian Head Fire burn scar in southeastern Iron County, according to the National Weather Service. The towns of Parowan and Brian Head are expected to be impacted by the flooding.

Drainage from the storm on state Route 143 has produced debris across the road about 1 mile south of Parowan.

Both directions of SR-143 are closed from milepost 4 to milepost 18, according to the Utah Department of Transportation. Motorists are advised to use an alternate route as the road is expected to take two hours to clear.

Flooding is anticipated to continue for the next 3 hours through the area with a flash flood warning in effect until 8:30 p.m.

Kane County

Shaded area denotes region subject to flash flood warning in Kane County. Radar map generated at 5:42 p.m. MDT, July 13, 2018 | Image courtesy of the National Weather Service, St. George News

A flash flood warning is in effect for central Kane County until 10:45 p.m.

At 5:38 p.m., Doppler radar indicated a thunderstorm producing heavy rain over Last Chance, Warm Creek and Croton canyons near the town of Big Water. These drainages are susceptible to flash flooding and terminate into Lake Powell.

The National Weather Service’s radar rainfall estimates indicate that the headwater areas have received 1.5 inches of rainfall in about an hour. Storms are forming downstream, increasing the flash flood threat.

Precautions

Remain alert for flooding even in locations not receiving rain. Dry washes, streams and rivers can become raging killer currents in a matter of minutes, even from distant rainfall.

The National Oceanic and Atmospheric Association and the National Weather Service offer the following safety rules for flash flooding:

  • When a flash flood warning is issued for your area or the moment you first realize that a flash flood is imminent, act quickly to save yourself. You may have only seconds.
  • Most flood deaths occur in automobiles. Do not drive your vehicle into areas where the water covers the roadway. Flood waters are usually deeper than they appear. The road bed may not be intact under the water. Just 1 foot of flowing water is powerful enough to sweep vehicles off the road. If the vehicle stalls, abandon it immediately and seek higher ground. Rapidly rising water may engulf the vehicle and its occupants and sweep them away.
  • Do not hike rivers and especially slot canyons while flash flood warnings are in place.
  • Do not hike alone and always tell someone where you and your buddy and others are going.
  • Get out of areas subject to flooding, including dips, low spots, canyons and washes.
  • Avoid already flooded and high-velocity flow areas. Do not try to cross a flowing stream on foot where water is above your knees.
  • Be especially cautious at night when it is harder to recognize flood dangers.
  • Do not camp or park your vehicle along streams and washes, particularly during threatening conditions.

During any flood emergency, stay tuned to official weather reports via radio, television and social media. Cell phone users can also sign up to receive weather alerts as text messages. You can also follow St. George News and Cedar City News for weather alerts and updates relevant to Southern Utah.

Email: jwitham@stgnews.com

Twitter: @STGnews

Copyright St. George News, SaintGeorgeUtah.com LLC, 2018, all rights reserved.

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2 Comments

  • Real Life July 13, 2018 at 6:29 pm

    Thanks Bob. At least you don’t have to worry about burning those darn weeds.

  • Carpe Diem July 14, 2018 at 10:53 am

    More coming tonite. Hold on to your hats!

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