Investigate Plotting across the anti-meridian

My tests with the GUI suggest that I am probably providing the correct coordinates but when I try to plot across the anti-meridian in cartopy things get decidedly weird. I only have a couple of very old test cases that I can use to test this at the moment, so I should spend some time making a simpler example data and testing if I can plot it correctly or if cartopy always makes it look super wrong.

The file I've been using for testing: grid_48hr_20120129.nc