Don’t imagine it’s all over when the wind drops immediately after an obvious cold front has passed. The glass may be rising fast and what breeze is left might have veered nicely, but give it at least six hours before you assume that things have settled down. Sometimes, a cold front is followed by a lull, and the breeze could start winding up in earnest after an hour or two. Many have been caught by this anomaly, so if in doubt, wait and see.