It took a while - but it was worth taking the time. Check it out:

Route Weather at a glance, video

• ROUTE WEATHER in WeatherTrack (user’s request)
• Create your own route. Import via “open in” from other apps (e.g. Dropbox). Export via “open in” to other apps
• Edit waypoints: name, lat/long, duration to next waypoint, (estimated) speed, fuel consumption
• Share complete route file by email. Supports GPX KML KMZ files
• In the route meteogram view all GRIB data at once, including information for each waypoint: distance, duration to next waypoint, bearing, fuel consumption.
• select wind mode: true, relative, apparent.
• Share Animation movies by email /open in apps with video support (user’s request).
• Share complete GRIB files by email and open in apps (e.g. Dropbox).
• Zoom in - to 0.001 degrees (111 m /121 yd) for offline map (for very high resolution GRIB files). (user’s request)
• Use three digit precision for very high resolution GRIB files in GRIB “Info”.
• User Interface:
  • Select multiple GRIB files to delete (edit mode).
  • Tap to rename the GRIB file (edit mode).
  • Retina resolution for icons. (user’s request)
  • Wave model for GFS can be specified in the GRIB parameters before downloading.
• For GLOBAL-LOCAL Feature: New icons for the forecasts, all in retina. (user’s request)
• Use “pull-to-refresh” to refresh forecasts.
• Current conditions refresh automatically every hour.