If we do decide to deviate around weather, some pilots get nervous, believing that air traffic control is in charge, and it’s best if we don’t rock the boat. Remember, though: ATC is not the final authority as to the operation of the aircraft. That controller, no matter how helpful he may be, is sitting in a dark room with his feet firmly planted on the ground. Only you are in the cockpit, looking at that nasty storm cloud ahead. If you need 30 degrees right to avoid it, you demand it without hesitation or regret.