Stratton23 wrote:Again the operational runs past 5 days drop off fast in terms of accuracy, they did this with our last outbreak as well, the models picked up on the pattern early , eventually they lost it for a couple of days as they normally do, only to bring back the cold in the medium- short range, when we are talking primarily the AO being the driver of cold in february instead of the EPO, thats definitely going to give the OP models a lot of trouble seeing it. We are looking at potential changes just before valentines day, so like the 12/13th , not a single model can be that accurate with the pattern that far out
Losing the AO now...trending positive towards mid-month is what's happening. And frankly, doesn't appear to go nearly as low as was forecast a few days ago. The AO forecast trending positive implies the ensemble expects limited/weak downward coupling from the stratosphere to the troposphere, or other tropospheric forcings (e.g., Pacific patterns, ENSO remnants) overriding it to favor a stronger, more zonal jet stream (flooding the country with Pacific air). This is not the trend you want to see and explains partly why the Ops are losing it.
The Clock is Ticking!!!
