gap,
Maybe the best way for you to get consistent weather data would be for us to use TDW's patrol log editor to record our position and weather reports. Because I'm crazy about immersion
I always transfer the notepad files from the patrol log editor into a custom Kriegstagebuch that I made. It would be easy to send you the patrol report. That way, you would have daily coordinates and weather reports for an entire patrol. I could also add a note for each time I save and load, so that you could determine the effective of loading on weather patterns.
Would this be useful?