What is an occluded front?

An occluded front is drawn in purple. It is a cold front that overtakes a warm front. They commonly occur close to a maturing low pressure system. 

A wide variety of weather can be found along an occluded front, with thunderstorms possible, but usually their passage is associated with a drying of the air mass. Additionally, cold core funnel clouds are possible if shear is significant along the cold front. Small isolated occluded fronts often remain for a time after a low pressure system has decayed and these create cloudy conditions with patchy rain or showers.

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High Low
Current 47°F 26°F
Average 50°F 30°F
Record 72°F March 19, 1945 -1°F March 19, 1967