Yeah if it waited 150 miles to dive down t would have worked too...I'm just saying on previous runs, the ULL dove down in the same spot but it's where t tracked from thee that changed. 00z and 06z runs 30-36 hours ago had the ULL diving down into southern Missouri almost exactly where today's 12z run is...the problem is those runs then tracked it ENE across KY, WV, and eventually near philly and south of SNE. Today's run brings the low north-northeast through Southern Illinois and then Indiana and NW Ohio and into upstate NY.
We lost the pseudo blocking mechanism that forced a more eastward track. A lot of that was probably due to the pressing arctic shortwave rounding the vortex near Greenland coming in weaker. There may have been some other nuances in Canada further west too.