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Associated Press

Posted on June 17, 2014 at 4:05 PM

Updated Tuesday, Jun 17 at 4:07 PM

Weather Underground midday recap for Tuesday, June 17, 2014

A cold frontal boundary extended from the West Coast to the upper Intermountain West on Tuesday, while a separate cold front stretched from the Mississippi Valley to the central Great Lakes.

A cold front extended from northern California, across the Great Basin and over the Intermountain West on Tuesday. A low pressure system along the eastern end of the frontal boundary ushered showers and thunderstorms across a handful of states. As warm, muggy air interacted with this system, strong to severe thunderstorms developed over the northern Plains. These thunderstorms brought large hail and heavy rain to the northern tier of the country, as tornado watches were issued in eastern Montana, northeast Wyoming, western North Dakota and western South Dakota. Brockway, Mont., reported half dollar sized hail. In addition, flood warnings were issued across the upper Mississippi Valley. Just to the west, a cluster of showers and thunderstorms moved across the Pacific Northwest and the upper Intermountain West. Winter storm warnings were issued in northwest Montana due to high elevation snow showers over the northern Rockies.

Meanwhile, a separate cold front extended across Iowa, northern Illinois and Michigan on Tuesday. Rain and thunderstorms accompanied this system, as Monroe, Wis., reported a midday total of 2.26 inches of rain. High pressure kept conditions mostly clear across the Gulf Coast, while isolated thunderstorms developed across southern Florida. Kendall, Fla., reported a midday total of 1.69 inches of rain.

Temperatures in the Lower 48 states Tuesday have ranged from a morning low of 28 degrees at Burns, Ore. to a midday high of 100 degrees at Gila Bend AF Aux AP, Gila, Ariz.

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