January 15th Pacific Bombogenesis

From Ryan Maue:

I used the full-resolution (T574) surface pressure grids from NCEP GFS for the data points:  

1000 mb ... (13/12z)
994 mb  ... (13/18z)
989 mb  ... (14/00z)
978 mb  ... (14/06z)
960 mb  ... (14/12z)
946 mb  ... (14/18z) 
940 mb  ... (15/00z)

Check out the DT pressure map I attached below. You'll never see a better signature of a tropopause fold. And obviously all sorts of upper level support with massive divergence aloft.