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The region has been bracing for severe weather for much of the week. Gulf moisture riding southerly winds pushed temperatures into the upper 60s and 70s on Thursday
-- ahead of a cold front expected to drop temperatures into the teens by Saturday morning. "This storm system has been showing significant signs that it could develop," said Chris Buonanno, a meteorologist at the National Weather Service in North Little Rock. "In the winter you don't always have the instability" that would allow tornadoes to develop, Buonanno said. "This time, we have the instability." While the spring brings most of the region's tornadoes, violent weather at this time of year isn't unheard of. A February 2008 outbreak killed 31 in Tennessee and 14 in Arkansas, and in January 1999 two separate outbreaks across the South killed 18, including seven in Arkansas. A year ago, there were no tornado deaths nationwide between Oct. 9, 2009, and March 10, 2010. Buonanno said there appears to be some association between changes in South Pacific Ocean temperatures and changes in the flow of the jet stream in the central part of the United States, causing an uptick in violent weather. Friday's tornado fatalities were the first in the nation since Sept. 16, when a woman hit a falling tree while driving in Queens, N.Y., and a man was killed in his home at Belleville, W.Va. The deaths push this year's count to 42 nationally, and to 5 in Arkansas. The deaths in Missouri were its first of the year.
[Associated
Press;
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