1/10 Thursday Happy Hour Euro Weeklies:

Week 1 : Transitional pattern, -AO Builds
Week 2: Trough east, -EPO
Week 3: Major trough & cold east, -NAO
Week 4: Trough & cold east, continued high latitude blocking

Impressive pattern evolution, particularly in the high latitudes.

— John Homenuk (@jhomenuk) January 10, 2019