Another miss on the AI. Here's how it does it. Basically the tpv becomes a wrecking ball and just drops in too fast and is big. Scroll forward from this spot. It's the only 500mb map worth anything from the AI.
https://charts.ecmwf.int/products/aifs_medium-z500-t850?base_time=202502151800&projection=opencharts_north_america&valid_time=202502191800
I think we need the bleeding to stop by getting 2 or 3 runs to hold steady, then hope the north trend begins to put the forum back where we were yesterday and Thursday with the primo runs.
As the Euro comes out, all I'll be looking at is the tpv. Does it stay intact well and does it lag behind vs 12z are going to predict the outcome vs 12z imho.
That would also explain why the Ukie ensembles didn't do better because despite the greater amplification, it didn't produce because the tpv was further west.
The good news is that we still have 4 more days of waxing and waning. The bad news is the ensembles and some operationals say we clearly cannot, for whatever reason, shake the seasonal pattern even with the wave changes later in the season. Crazy.
Ensembles have been leaning east all along. Don't be surprised if they lean further east in light of the operational. I'll be happy if they hold, but preferably improvile of course.