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Northerly Trough Transitions?

Started by Isolated Frost, Feb 10 2012 17:54

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#1 Isolated Frost

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Posted 10 February 2012 - 17:54

Hello.
I was wondering whether there were any patterns in which northerly winds, due to blocking to the west/north-west and a trough to the east/north-east, eventually turned to north-easterly or easterly winds, with the trough digging into europe allowing colder air from the continent into britain?
Thanks.
Hoping for a future in meteorology!

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#2 Mr_Data

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Posted 10 February 2012 - 18:10

View PostIsolated Frost, on 10 February 2012 - 17:54 , said:

Hello.
I was wondering whether there were any patterns in which northerly winds, due to blocking to the west/north-west and a trough to the east/north-east, eventually turned to north-easterly or easterly winds, with the trough digging into europe allowing colder air from the continent into britain?
Thanks.

Late Feb 2005 is a well-known recent example
Old weather forecasts and natural phenomena

http://www.youtube.c...hcadmium/videos

#3 Isolated Frost

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Posted 10 February 2012 - 18:19

View PostMr_Data, on 10 February 2012 - 18:10 , said:

Late Feb 2005 is a well-known recent example
Just had a look on Wz and yep- right on the money... synoptics probably won't be as good this time around, but something similar at least would be great.
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#4 Thundery wintry showers

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Posted 10 February 2012 - 19:19

Here's a notable but very ancient one from January 1897:
http://www.wetterzen...00118970121.gif
http://www.wetterzen...00118970122.gif
http://www.wetterzen...00118970123.gif
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#5 damianslaw

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Posted 12 February 2012 - 18:03

Wasn't late November 2010 another good example?

#6 phil n.warks.

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Posted 12 February 2012 - 18:36

I recall this in my favourite winter.A slight thaw then.

http://www.wetterzen...00119630126.gif
http://www.wetterzen...00119630128.gif
http://www.wetterzen...00119630130.gif
http://www.wetterzen...00119630201.gif
http://www.wetterzen...00119630203.gif

Shows what`s possible if an Atlantic High retrogresses and we get amplitude in the flow.
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Veteran of the 1962/63 Winter when Snow lay for 66 days ---will we ever see its like again?.

#7 Thundery wintry showers

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Posted 12 February 2012 - 18:42

View Postdamianslaw, on 12 February 2012 - 18:03 , said:

Wasn't late November 2010 another good example?
It was a slower version of the same sort of progression- instead of having an individual trough slide down the North Sea we had a series of troughs, and thus it took three or four days for England and Wales to change from having a northerly airflow to having an east to north-easterly flow (although in Scotland it only took a couple of days).
"There is always an easy solution to every human problem - neat, plausible, and wrong." - H L Mencken

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