Why do some clouds appear as white clouds and others appear as gray clouds when looking at the satellite view? Posted 2007-08-26T14:48:33+00:00 - Updated 2007-08-26T14:48:33+00:00 By ...

Locals call it May gray and June gloom. But the heavy-looking gray clouds that blot out the sun aren’t just the bane of beachgoers. They serve an important environmental role.