In areas where cold fronts catch up to the warm front, the occluded front develops.
From the en.wikipedia.org
Note the maximum winds are on the poleward side of the occluded front.
From the en.wikipedia.org
See cold front, occluded front, stationary front, and warm front.
From the ocregister.com
When they catch up with the preceding warm front, the portion of the boundary which does so is then known as an occluded front.
From the en.wikipedia.org
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.