When a warm ocean current meets a cold ocean current, they produce

When a warm ocean current meets a cold ocean current, they produce fog. This happens because the warm air above the warm ocean current rises and cools as it meets the cold air above the cold ocean current. This cooling causes the moisture in the warm air to condense into tiny water droplets, which form a mist or fog. The temperature difference between the warm and cold currents also creates a zone of instability in the atmosphere, which can lead to other weather phenomena like storms or squalls, but not hail.