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The maximum frost depth observed in the contiguous United States ranges from 0 to 8 feet (2.4 m). [1] Below that depth, the temperature varies, but is always above 0 °C (32 °F). Alternatively, in Arctic and Antarctic locations the freezing depth is so deep that it becomes year-round permafrost , and the term " thaw depth " is used instead.
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Illinois averages around 50 days of thunderstorm activity a year which put it somewhat above average for number of thunderstorm days for the United States. Illinois is vulnerable to tornadoes with an average of 54 occurring annually, which puts much of the state at around 9.7 tornadoes per 10,000 square miles (30,000 km 2) annually.
DePue, originally called Trenton, was established in 1853. [5] The present name refers to an early French fur trader by the name of De Pue. [6] The site had long been used as a port and ice harvesting center on the Illinois River.
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Kell is located in southern Marion County south-southeast of Salem, the county seat, and 5 miles (8 km) northeast of Dix.. According to the U.S. Census Bureau, Kell has a total area of 1.004 square miles (2.60 km 2), of which 0.002 square miles (0.01 km 2), or 0.20%, are water.
Some metro east areas got more than 6 inches of rain in 24 hours. Here’s what the National Weather Service St. Louis was reporting as of Tuesday morning.