In Case You Mist It

A large high-pressure system has helped trap humid air moving inland, producing foggy mornings. Here’s how it happens:

1. Ground cools during the evening.

2. Wind moves humid air inland, across cool ground.

3. Air temperature drops to the dew point and fog forms.

4. When sun rises, it heats air temperature above dew point and fog disappears.

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What’s a “Dew Point�?

Dew point is the temperature at which air will not accept additional moisture. Water molecules, which have been circulating as gas, lose energy as temperature drops and condensation produces water droplets--dew.

Source: WeatherData