Flood advisory, severe thunderstorm warnings for Washington, Iron counties

Flooding in Hildale, Utah, and Colorado City, Arizona, Oct. 17, 2015 | Photo by Cami Cox Jim, St. George News

ST. GEORGE — The National Weather Service in Salt Lake City has issued a flood advisory for central Washington County Sunday until 4 p.m., as well as a severe thunderstorm warning for southeastern Iron County and northeastern Washington County until 3:15 p.m.

Dots indicate area affected by thunderstorm warning, Washington County, Utah, Oct. 18, 2015, 2:40 p.m. | Photo courtesy of the National Weather Service, St. George News
Dots indicate area affected by thunderstorm warning, Washington County, Utah, Oct. 18, 2015, 2:40 p.m. | Photo courtesy of the National Weather Service, St. George News | Click map to enlarge

At 2:25 p.m., Doppler Radar indicated thunderstorms producing heavy rain. This will result in minor flooding on I-15 from Washington City to Pintura. Associated tributaries to the north of the interstate are expected to produce excessive runoff.

At 2:39 p.m., Doppler Radar indicated a severe thunderstorm capable of producing quarter-size hail and damaging winds in excess of 60 mph. This storm was located 7 miles southeast of New Harmony, 22 miles southwest of Cedar City, and moving northeast at 40 mph.

Affected areas

Flood: Washington, Hurricane, Toquerville, Leeds

Thunderstorm: Kanarraville, Pintura, Kolob Canyon

Precautionary/ preparedness actions

Dots indicate the area affected by the flood advisory, Washington County, Utah, Oct. 18, 2015, 2:25 p.m. | Photo courtesy of the National Weather Service, St. George News | Click map to enlarge
Dots indicate the area affected by the flood advisory, Washington County, Utah, Oct. 18, 2015, 2:25 p.m. | Photo courtesy of the National Weather Service, St. George News | Click map to enlarge

Do not drive your vehicle into areas where the water covers the roadway. The water depth may be too great to allow your car to cross safely. Move to higher ground.

Severe thunderstorms produce damaging winds, destructive hail, deadly lightning and very heavy rain. For your protection, move to an interior room on the lowest floor of your home or business. Heavy rains flood roads quickly, so do not drive into areas where water covers the road.

This is a Supercell thunderstorm. Due to the rotating nature of these storms, they are capable of producing all types of severe weather, including extremely large hail, destructive straight-line winds and possibly tornadoes. Move quickly to a safe shelter, preferably into a basement or an interior room such as a bathroom or closet.

Torrential rainfall is also occurring with this storm and may lead to flash flooding.

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