Change the Weather

Snow Effect:

textFormat
brief
briefmap
armplane
map wta.T2
layer day2.LAY 3
clouds 11022 ----- LOOK AT THIS!!!
wind 65 7
view 1211 654441 1501791

In the start of the .M files, you can see something like that.  If you want the change something to make the ground have patches of snows. The LOOK AT THIS Is the main point. You can see that the higher part of the clouds is at 11022 feet above the ground.  Change this to 1 then the "SNOW" will be on the ground. It is also "ON THE SEA" 

Changing wind directions and speed:

textFormat
brief
briefmap
armplane
map wta.T2
layer day2.LAY 3
clouds 11022
wind 65 7 <----THIS IS THE ONE!

You can change the wind tag to whatever you wish. If you want a north wind with a 200 knots you should type:

wind 0 200

Or a south wind with 900 knots...

wind 180 900

So the tag is

wind (degree of wind) (speed in knots)