Long Range Low Tracking
Latest runs of the GFS have slowed down and really shifted the low pressure system further southwest compared to some of the older runs that really wanted to kick the cutoff low out much quicker.
Comparison of the 0z and 12z model runs starting at the 9th at 0z.
Monday 0z comparison of the 0z run and the 12z run
The 12z run doesn't kick the low pressure system out into the Atlantic by 0z on the 14th while the 0z run doesn't send the low out until the 13th at 0z.