Winds aloft inaccurate

Winds aloft according to aviationweather.gov indicate I should be receiving a good tailwind along my route of flight. Today reporting about 270 at 76.

Instead I've gotten a solid headwind (030 at 81), not to mention it fluctuates a lot coming from the starboard side, then suddenly from port side.

The winds are loaded correctly (they indicate 270 at 76 at an altitude of 31000, similar at 41000 I think), I am using NOAA as my source, unregistered version (version 2), this is FS2004. I have weather set on FS9 to "user defined settings", but according to the aircraft's panel, the winds are coming straight from 12 o'clock.

It eventually may change to something close to what actual values should be, but they definitely are way off when the winds are reporting to be coming from the Northeast, not from the West (yeah I've taken into account magnetic variation (this is Central US).

Help appreciated, thanks!