Hi, if you are running a supermod you will have to replace the following lines to the 3 campaign mis files, however this probably will not have any effect untill a new patrol is started or maybe even a new campaign, the following is from stock:
[Mission]
Title=
MissionType=0
MissionDataType=1
Year=1939
Month=1
Day=1
Hour=12
Minute=0
Fog=0
FogRand=0
Clouds=0
CloudsRand=0
Precip=0
PrecipRand=0
WindHeading=0
WindSpeed=5.000000
WindRand=0
WeatherRndInterval=5
SeaType=0
Briefing=
Hope this helps.

Cheers.