During a conversation with a successful pigeon flyer the subject of pigeons flying around storms came up. If an animal detects danger it also knows how to avoid it, if this were not the case it wouldn't recognize danger in the first place.
Storms do interfere with the pigeons ability to navigate, probably do to electromagnetic activity.
Don't believe it. Some storms are a mile wide and a mile deep, others are ten miles wide and ten miles deep, still others have no end in sight and last for days. Is there any evidence that would suggest pigeons can measure the size or ferocity of a storm then make the correct response and 'go around' or fly through, whichever would be easiest in reaching their lofts. It seems some pigeons are more sensitive to the magnetism within a storm and get confused and some birds aren't as affected. For some reason pigeons that usually don't show up on normal race days come through on these days and just the opposite is true.