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Meteorology (Weather)/low pressure system merger. for a story/book

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Question
1)could a strong extratropical cyclone merged with a cutoff low
pressure? and would this be a powerful storm?
2)if not; what would be a "perfect storm"? (preferably in winter, not necessarily in North America)

I'm trying to write a book and i was going to use a strong
extratropical cyclone merging with a cutoff low pressure. But i never learnt about storm mergence in school or I've forgotten. i want to keep with reality.
any help will be much appreciated!

Answer
Hi Dillon

A intense low pressure system could become a cut-off low by loosing the upper air jet stream winds steering it thus causing it to stall in place. Typically that set-up leaves the original low a weaker system over time:

http://www.atmos.illinois.edu/~snodgrss/Midlatitude_cyclone.html

http://www.theweatherprediction.com/habyhints/200/

http://www.theweatherprediction.com/blocking/

http://www.stormtrack.org/forum/showthread.php?20085-Closed-Lows-amp-cut-off-Low

A "perfect storm" is a storm, extra-tropical or tropical, that is a "design" storm to bring extreme bad weather to a particular location or area. Design means having all ingredients including perfect path and atmospheric structure to be an extremely intense record breaking storm for a location.

A perfect storm was, as an example, the one that hit New England in late October 1991:

http://en.wikipedia.org/wiki/1991_Perfect_Storm

http://www.ncdc.noaa.gov/oa/satellite/satelliteseye/cyclones/pfctstorm91/pfctsto

As to super storms, see:

http://www.theweatherprediction.com/habyhints/188/

http://blog.chron.com/sciguy/2013/02/bombogenesis-imminent-in-new-england-blizza

http://tinyurl.com/ph7mrl9

http://weatherknowledge.com/etcetera.html

Hope this helps!  

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Donald Rosenfeld

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Any questions (except private) answered from the 1st grade level on up pertaining to any aspect of Weather. I am a 20 year member of the American Meteorological society and a long time forecaster of eastern United States snow storms and Hurricanes.

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