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Meteorology (Weather)/Phrase definition

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Question
I am constantly seeing media meteorologists say "a piece of energy is going to move through or across an area" or a low pressure system is going to "spin off a spoke of energy". I can't find any information that explains what they mean by "piece of energy". I have a fairly good understanding of energy in the physics sense so I am wondering if this is a misnomer. Are these areas of higher temperature, lower pressures, or what. Thanks for your time.

Answer
Hi David

First, "energy" is vorticity:

http://ww2010.atmos.uiuc.edu/%28Gh%29/guides/maps/fcst/5vrthght.rxml

http://www.theweatherprediction.com/habyhints/56/

http://tropic.ssec.wisc.edu/real-time/windmain.php?&basin=atlantic&sat=wg8&prod=

And, Phasing:

http://theweathercentre.blogspot.com/2011/01/weather-explained-phasing.html

http://www.americanwx.com/bb/index.php/topic/2173-recognizing-phasing-jets-prior

http://weatherchatroom.forumotion.com/t72-what-the-hell-is-phasing-and-what-does

http://www.weatherknowledge.com/learn.html  

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Donald Rosenfeld

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