Henry Margusity

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A Spring Storm Stuck Into a Winter Pattern... Bad Things Can Happen!

December 20, 2013; 9:55 AM ET

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1. The severe weather will be nasty Saturday, especially across the lower Mississippi Valley. It appears to me that we will see several tornadoes as well as numerous reports of wind damage given the strength of the low-level and upper-level jets. As I said in the video, it's a spring storm in a winter weather pattern which means big problems and nasty weather. I think everyone has now honed in on the area shown on my map below as to where the nasty weather will occur.

2. The flooding will also be extensive given the amount of rain that will fall from Texas to western New York. I can see up to 6 inches of rain in some areas which will lead to flash flooding. The snowcover across Indiana, Ohio into the Appalachians will be wiped away by the warmth and rainfall.

3. The snowfall will be a quick-hitting snow event from Kansas to Ontario. Snow rates of 1-2 inches per hour for a six- to 12-hour period will pile snow up to a foot or so in some places.

4. Still watching the New Year's Eve storm and possible storm around Dec. 27. NAO is showing signs of going negative around Jan. 1 which is a good sign that a coastal storm may develop.

The views expressed are those of the author and not necessarily those of AccuWeather, Inc. or AccuWeather.com

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Henry Margusity
AccuWeather.com severe weather expert, Henry Margusity, offers the Meteorological Madness blog including detailed analysis of severe weather across the US.