Weather control

I reloaded SH3 to review the good old days but something strange has taken place - in every career mission the weather starts out typical harbor - wind 5 knots, clear skies - and then moves to a wind of 8 knots or so with cloudy skies but no rain - and then the sea becomes like glass with wind 0 knots and clear skies FOR THE REST OF THE GAME. Is my DVD screwed up or what? Has there been a reality shift? I have reloaded it twice and still the same results.

So where exactly is the weather data and how can I change it?