go to settings somewhere downwards, theres an button called adapt or something in that direction
click on it, a new window will appear.
on the top choose "weather" and check the settings of cloud visibility and so on and if necessary, correct it.
a clooud visibility range on which i fly is about 160-180 nm (i hope this is right

)
well i hope this was helpfull
regards,
Lucky3333 a.k.a. Lukas