bluewave Posted November 9, 2011 Share Posted November 9, 2011 The Scandinavian Ridge just registered a +400 m anomaly according to the RaleighWX maps. This is going along with the pattern that we have been seeing recently. Last November the +400 m anomalies were found over SE Canada, the Bering Sea, and Greenland. This is much different than the pattern that produced the record cold that Europe experienced last November. 11/11/10 11/17/10 11/27/10 Link to comment Share on other sites More sharing options...
HeatMiser Posted November 9, 2011 Share Posted November 9, 2011 I'm assuming if this ridge continues, we can forget about greenland blocking? Link to comment Share on other sites More sharing options...
Lee Posted November 10, 2011 Share Posted November 10, 2011 I'm assuming if this ridge continues, we can forget about greenland blocking? Blocking as you might know, can form from different means and has been known to retro from scan. Also, it can sometimes develop fairly rapidly from almost no indicative pattern evolution. I was looking @ some aspects of the Great Appalachian Storm of Nov. 1950 and thought I would see how the block evolved then. Here is November 15th: http://vortex.plymouth.edu/cgi-bin/gen_reanal-u.cgi?re=nhem≤=500&va=hght&in=60&pl=cf&yy=1950&mm=11&dd=15&hh=12&overlay=no≤=&va=&in=&pl=ln&yy=&mm=&dd=&hh= A week later : http://vortex.plymouth.edu/cgi-bin/gen_reanal-u.cgi?re=nhem≤=500&va=hght&in=60&pl=cf&yy=1950&mm=11&dd=22&hh=12&overlay=no≤=&va=&in=&pl=ln&yy=&mm=&dd=&hh= November 25 during storm : http://vortex.plymouth.edu/cgi-bin/gen_reanal-u.cgi?re=nhem≤=500&va=hght&in=60&pl=cf&yy=1950&mm=11&dd=25&hh=12&overlay=no≤=&va=&in=&pl=ln&yy=&mm=&dd=&hh= As you can see, this block was pulled up into southern greenland via a SE Canadian low or west based 50-50 low in conjunction with a vortex over hudson bay. This wasn't a long lived block but with right timing it helped initiate a super storm with intense cold deep into the south.. Link to comment Share on other sites More sharing options...
weatherdude Posted November 10, 2011 Share Posted November 10, 2011 "I am not really sure how things will play out this time, but the analogs were in a delayed but not denied mode. The analogs rolled forward had some blocking over Southern Canada east to the Atlantic in December followed a strong blocking pattern for January. Still a bit early in the game to guess how things turn out." Bluewave: You mention "the analogs". Where did your analog list come from? Thanks! Link to comment Share on other sites More sharing options...
WxMidwest Posted November 10, 2011 Share Posted November 10, 2011 Are you using the the SCA index or just eyeing it up..... The SCA and POL teleconnections can be leading indicators for NAO blocking down the line... Link to comment Share on other sites More sharing options...
bluewave Posted November 11, 2011 Author Share Posted November 11, 2011 Are you using the the SCA index or just eyeing it up..... The SCA and POL teleconnections can be leading indicators for NAO blocking down the line... I am using the raw 500 mb anomalies. November 2003 was the most recent analog example from the group with a good Pacific match also. November 2011 so far November 2003 December 2003 January 2004 Link to comment Share on other sites More sharing options...
SnowGoose69 Posted November 11, 2011 Share Posted November 11, 2011 November 2003 was one I mentioned a few days ago. The ENSO situation is not the same but the pattern so far has resembled that. December 2003 was not necessarily that cold but the NE managed to sneak 2 snow events into what was a relatively unfavorable pattern. Link to comment Share on other sites More sharing options...
#NoPoles Posted November 11, 2011 Share Posted November 11, 2011 what does this pattern mean for the Pacific NW/ Sierras? Link to comment Share on other sites More sharing options...
wxmx Posted November 11, 2011 Share Posted November 11, 2011 what does this pattern mean for the Pacific NW/ Sierras? Most probably colder and wetter/snowier than normal. Link to comment Share on other sites More sharing options...
bluewave Posted November 12, 2011 Author Share Posted November 12, 2011 what does this pattern mean for the Pacific NW/ Sierras? The models bring in the coldest temperatures there in about a week. Link to comment Share on other sites More sharing options...
Lee Posted November 13, 2011 Share Posted November 13, 2011 Just for the sake of comparing the blocking setup now with the set up of this time in '95, as the models actually show a little similarity within the next week in the north Atlantic, albeit not near as strong. http://vortex.plymou...yy=&mm=&dd=&hh= Link to comment Share on other sites More sharing options...
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