All this talk about ice jams might have you
wondering, what the heck is an ice jam & what causes it? As rivers and
lakes in the Midwest temporarily began to thaw from a long, frosty winter, some
residents have been asked to evacuate as ice jams encroach on their lives. According
to NOAA, an ice jam occurs when pieces of floating ice are carried downstream
and build up behind any obstruction. The impediment holds water back, and if
the ice jam suddenly breaks free, the rush of water can lead to flooding
downstream.
Read more…
http://www.weather.com/news/commuter-conditions/ice-jams-midwest-20140224
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