Tendency in angular momentum is down once more, mainly due to a strengthening easterly trade wind surge and slight easterly mountain torque over the sub-tropics. Latest wavetrak image depicts this over the Pacific and Indian Ocean sectors: http://cimss.ssec.wi...s/wavetrkP.html We still have some poleward positive momentum transport supporting anomalous westerly flow 50-55N, but also hints of increased sub-tropical flow as a result of the tropical winds picking up. Frictional torques are suggesting a slight northward shift in the jet towards the sub-polar region which, in combination with the sub-tropical flow is supportive of the amplified pattern being programmed right now t144 onwards. http://www.cdc.noaa....ltauf.90day.gif Overall, the general direction of travel is positive for cold arriving via height rises over the UK and Scandinavia.