JD-EE about my crosstrack error calculation:
You quoted an unjustified level of precision there. However, even with that error band it was very slightly to the left of track when you'd expect any pilots even minimally weather aware to be somewhere else.
You are right, I should have given a range, about 2.6 to 3.2 nm, to my XTK result. The intention was to give those willing to check it what I found using all the available digits. Not a good idea, I admit.
My point is not to throw a judgment on the position relative to the weather. It is that the a/c was not riding on the airway centerline with the AP in NAV mode straight into the storm, as have been suggested earlier. The pilots almost certainly attempted deviations. I don't pretend this is a big piece of information either.