bluewave Posted February 4, 2013 Share Posted February 4, 2013 The GFS ensembles have been hinting that we could see an EPO drop around the middle of February. The last three times that an -EPO pattern emerged during a -PDO La Nina-like pattern here in February we had mixed precipitation storms. 2-18-2000 http://www.wunderground.com/history/airport/KNYC/2000/2/18/DailyHistory.html?req_city=NA&req_state=NA&req_statename=NA 2-18-2009 http://www.wunderground.com/history/airport/KNYC/2009/2/18/DailyHistory.html?req_city=NA&req_state=NA&req_statename=NA 2-02-11 http://www.wunderground.com/history/airport/KNYC/2011/2/2/DailyHistory.html?req_city=NA&req_state=NA&req_statename=NA The main theme during this type of pattern is Arctic high pressure building over Canada with the coldest temperatures remaining to our west. At the same time, there is just enough of a SE Ridge offshore to allow storms to track very close to the area. The amount of CAD in place when the storm arrives determines how much liquid to frozen precipitation we ultimately end up with here. I prepared a temperature composite for the times this pattern emerged during February 2000, 2009, and 2011. Link to comment Share on other sites More sharing options...
PB GFI Posted February 4, 2013 Share Posted February 4, 2013 The GFS ensembles have been hinting that we could see an EPO drop around the middle of February. compare.we.png The last three times that an -EPO pattern emerged during a -PDO La Nina-like pattern here in February we had mixed precipitation storms. 2-18-2000 http://www.wunderground.com/history/airport/KNYC/2000/2/18/DailyHistory.html?req_city=NA&req_state=NA&req_statename=NA 021821.png 2-18-2009 http://www.wunderground.com/history/airport/KNYC/2009/2/18/DailyHistory.html?req_city=NA&req_state=NA&req_statename=NA 2009.png 2-02-11 http://www.wunderground.com/history/airport/KNYC/2011/2/2/DailyHistory.html?req_city=NA&req_state=NA&req_statename=NA 2011.png The main theme during this type of pattern is Arctic high pressure building over Canada with the coldest temperatures remaining to our west. At the same time, there is just enough of a SE Ridge offshore to allow storms to track very close to the area. The amount of CAD in place when the storm arrives determines how much liquid to frozen precipitation we ultimately end up with here. I prepared a temperature composite for the times this pattern emerged during February 2000, 2009, and 2011. temp.gif How comparable were trhe NAO`s brother ? Link to comment Share on other sites More sharing options...
bluewave Posted February 4, 2013 Author Share Posted February 4, 2013 How comparable were trhe NAO`s brother ? When the -EPO patterns emerged, the dominant blocking was on the Pacific side near Alaska. Link to comment Share on other sites More sharing options...
PB GFI Posted February 4, 2013 Share Posted February 4, 2013 When the -EPO patterns emerged, the dominant blocking was on the Pacific side near Alaska.My thouights are that as the center comes south and eat - NW changes back to acc snow .I dismissed it yesterday when it was mentioned , but now i thnk if the Euro is right , rates may help if the system can get to the BM Link to comment Share on other sites More sharing options...
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