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Storms, floods threaten Boone County, state

Friday, May 31, 2013 | 8:52 a.m. CDT; updated 5:44 p.m. CDT, Friday, May 31, 2013
Heavy rain brought flooding to Columbia and Boone County on Friday.

COLUMBIA — Flooding is beginning to cause serious hazards in Boone County. The Missouri Department of Transportation closed U.S. 40 west of Columbia at 7:15 a.m.

A flood warning had been posted for Columbia until 10:30 a.m. Friday, although flooding will remain a concern through Sunday.

Forecasters warned that large hail and more tornadoes could strafe parts of Oklahoma, Arkansas and Missouri on Friday, a day after powerful storms killed one man and left at least two missing in the storm-weary region.

Up to a dozen tornadoes touched down in mostly rural parts of Arkansas on Thursday, as well as one in Illinois and three in Oklahoma. One twister bounced through the Tulsa suburb of Broken Arrow, causing some structural damage, but no injuries.

The National Weather Service was sending teams to survey the aftermath of Thursday's storms in Arkansas. Warning coordination meteorologist in Little Rock, John Robinson, said it could take days for the weather service to confirm whether tornadoes struck as flooded highways was hindering access to the storm-hit areas.

Heavy winds caused a tree to topple onto a car in Tull, about 30 miles southwest of Little Rock, late Thursday, killing the driver, the Grant County Sheriff's Office said.

In nearby Scott County, a sheriff and game warden were reported missing in floods. Arkansas Department of Emergency Management spokesman Tommy Jackson said the pair was "among the missing" although he couldn't say how many people were missing in total.

Nine people were reported injured.

And more storms were expected Friday.

The agency's Storm Prediction Center in Norman, Okla., said large hail and tornadoes are likely Friday in Oklahoma and parts of the Ozarks in Arkansas and Missouri. The areas at greatest risk include Oklahoma City, Tulsa and Joplin, where the second-deadliest American tornado on record killed at least 158 people in 2011.

Thursday's tornadoes all appeared to be much less dangerous than the top-of-the-scale EF5 storm that struck Moore, Okla., on May 20 and killed 24 along its 17-mile path. The U.S. averages more than 1,200 tornadoes a year, but EF5 storms like the one in Moore — with winds over 200 mph — happen only about once per year. The tornado last week was the nation's first EF5 since 2011.

This spring's tornado season got a late start, with unusually cool weather keeping funnel clouds at bay until mid-May. The season usually starts in March and then ramps up for the next couple of months.

Of the 60 EF5 tornadoes since 1950, Oklahoma and Alabama have been struck the most, seven times each. More than half of these top-of-the-scale twisters have occurred in just five states: Alabama, Iowa, Kansas, Oklahoma and Texas.


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