There was a slight 1 o'clock to 12 o'clock breeze. Anyone know what causes it?
Yes, air masses of differing temperatures seeking equilibrium. During the day, air above land heats up faster than air above water. Warm air above land expands and rises, and heavier, cooler air rushes in to take its place, creating wind. At night, the winds are reversed because air cools more rapidly over land than it does over water.
