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12-10-2010, 08:51   #1
darkman2
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Turning colder?.....

....with frost and maybe even wintry showers aswell for a while next week. A good start for snow junkies if this is the start of a below average period for temperatures. Looks like a sharp Northerly may occur next week. ECM and GFS seem to agree somewhat and the UKMO is trending that direction.





The low pressure to the Northwest or just South of Greenland looks like a "tigger" low with cold air tucked in behind. Greenland high pressure set to make it's return.


So maybe a bit of a shock to the system on the way.




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12-10-2010, 09:10   #2
 
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Yes, there is a chance that things could turn out pretty nippy in about a week's time as a mid-upper trough sets up around the Canadian maritimes, pumping high geopotentials towards Greenland and feeding the High up there. That would mean a northerly-northwesterly flow downstream in our vicinity, but whether it will be cold enough is the big question. A small shift of the High one way or the other could eliminate the risk altogether, but one to watch. There is some nice cold already building in the Arctic just itching to head south for the winter!

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12-10-2010, 09:18   #3
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I know its FI but...



Look at the 528.

Could be an early wintry blast alright! Still in FI though so not holding my breath...
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12-10-2010, 10:17   #4
 
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Chilly enough this morning across some parts

9am Met reports:
2c at Shannon with fog
3c at Claremorris with 'N/A'
5c at both Valentia and Ballyhaise. Fine/Fog

http://www.met.ie/latest/reports.asp


5.8c here at the moment with thick fog at 10.16am.


Edit: 3c at both Shannon Apt and Claremorris on the 10am reports:

http://www.met.ie/latest/reports.asp


Edit Edit: 4c at Claremorris on the 11am reports, and 5c at Shannon Apt:

http://www.met.ie/latest/reports.asp

Not unusual in itself but in stark contrast to other station readings. 15c at Belmullet! 13c at Mace Head. Midland stations around 10c and 12c at both Dublin Apt and Casement.

6.4c in Tuam at the moment, with fog thickening up a little after earlier thinning.

Last edited by Deep Easterly; 12-10-2010 at 11:37. Reason: update
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12-10-2010, 11:41   #5
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06Z GFS FI still showing that 2/3 days wintry blast which if it came off would probably bring us some October snow.

Long way off though but exciting to see stuff like this on the charts already.
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12-10-2010, 11:46   #6
skipz
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Would this October snow be a mainly higher ground situation?
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12-10-2010, 11:47   #7
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lol

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12-10-2010, 11:51   #8
 
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Quote:
Originally Posted by Deep Easterly View Post
6.4c in Tuam at the moment, with fog thickening up a little after earlier thinning.
Much the same in Galway. The fog has yet to clear and temp 6.4C.
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12-10-2010, 11:57   #9
 
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12-10-2010, 12:00   #10
 
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This was the set up that brought some late October snowfall over part of Norn Iron and the north Midlands in 2008 when a low bearing down from the NW came in contact with some cold 850's over Ireland:



Image source: http://en.vedur.is/
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12-10-2010, 12:18   #11
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if cold air will be streaming down from the north- northwest by that stage, perhaps a polar low could be in the offing?
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12-10-2010, 12:18   #12
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Originally Posted by Fionagus View Post
Much the same in Galway. The fog has yet to clear and temp 6.4C.
still quite foggy here also.
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12-10-2010, 12:54   #13
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And the winter of 10/11 started after a remarkably warm start to October by mid-month a Northerly blast covered the country with widespread wintry showers. Unbeknownst to the the people of Ireland & Britain was that winter 10/11 had now arrived and temperatures would not rise to double figures until early March 2011 in a winter the coldest in the region since medieval records.
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12-10-2010, 12:56   #14
 
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12-10-2010, 14:48   #15
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here is my ramp:



Last edited by nacho libre; 12-10-2010 at 16:28.
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