ice jam"1. An accumulation of broken river ice caught in a narrow channel. Ice jams during freeze-up are quite porous, whereas breakup jams may comprise solid flows, frequently producing local floods during a spring breakup. 2.
Ice Jam
In hydrologic terms, a stationary accumulation that restricts or blocks streamflow.
Ice Nucleus ...
Ice Jam A stationary accumulation that restricts or blocks streamflow.
ICE JAM An accumulation of broken river ice caught in a narrow channel, frequently producing local flooding. Primarily occurs during a thaw in the late winter or early spring.
Ice Jam - permalink - collapse
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In hydrologic terms, a stationary accumulation that restricts or blocks streamflow.
NOAA National Weather Service - Cite This Source - This Definition ...
Breakup Jam: Ice jam that occurs as a result of the accumulation of broken ice pieces.
Breakup Period: The period of disintegration of an ice cover.
Breezy: 15 to 25 mph winds ...
Flash floodA flood that occurs within a few hours (usually less than six) of heavy or excessive rainfall, dam or levee failure or water released from an ice jam.
intense rainfall, dam failure, ice jam). However, the actual time threshold may vary in different parts of the country. Ongoing flooding can intensify to flash flooding in cases where intense rainfall results in a rapid surge of rising flood waters.
Breakup is signaled by the breaking of the ice and often associated with ice jams and flooding.Breakup DateIn hydrologic terms, date on which a body of water is first observed to be entirely clear of ice and remains clear thereafter.
within river bank rises, minor ice jams, etc.River SystemIn hydrologic terms, all of the streams and channels draining a river basin.
Flash floods can also occur when ice jams block the normal course of a river, or when a man-made structure, such as a dam, collapses, i.e.; the Johnstown Flood of 1889.
Flash Flood Watch- A Flash Flood Watch will be issued for potential rapid flooding from either torrential downpours, dam breaks, or ice jam breaks. They are usually issued up to 12 hours prior to a possible flash flood event.
Flash Flood
A flood that rises quite rapidly with little or no advance warning, usually as a result of intense rainfall over a small area, or possibly, an ice jam, a dam failure, etc.
quite rapidly with little or no advance warning, usually as the result of intense rainfall over a relatively small area. Flash floods can be caused by situations such as a sudden excessive rainfall, the failure of a dam, or the thaw of an ice jam.
The term may also be used to alert the public of non life threatening flooding of small streams, streets, storm drains, and low lying urban areas. A flash flood can also be caused by the failure of a dam or from ice jams on waterways.
 See also: Pressure, Water, Weather, Atmosphere, Storm
  
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