Winter '10 / '11 - Snow Storm #3 - Teleconnections

Arctic Oscillation continues its long run at well below zero as a minor warming event takes hold in the stratosphere...shown below by the hi-latitude...above normal geo-potential heights (GPH).

Also note the AO/s classic tri-pole configuration...in this case with strongly positive 5H anomalies over the Bering Sea and a secondary maxima over NE Canada.