Examples of occluded front

• An occluded front is thus a combination of those two signs.

• Initially attached to an occluded front, the low detached from the system and gradually acquired tropical characteristics.

• They also can occur under altostratus cloud preceding a warm or occluded front, when cumulus usually lose vertical development as the sun's heat decreases.

• In areas where cold fronts catch up to the warm front, the occluded front develops.

• When this happens a new low center will form on the triple-point (the point where the cold front, warm front, and occluded front meet).

• The point where the warm front and the occluded front meet (and consequently the nearest location of warm air to the center of the cyclone) is called the "triple point".

• The occluded front symbol should thus be plotted at the position where the cold air is intersecting the surface, as on the image to the right.

• The former occluded front to its northwest became a warm front which moved back to the west around the strengthening, and now dominant, southern low pressure center.

• Occluded fronts form late in the cyclone life cycle near the center of the cyclone and often wrap around the storm center.

• Occluded fronts are indicated on a weather map by a purple line with alternating half-circles and triangles pointing in direction of travel.

• Occluded fronts usually form around mature low-pressure areas.

• Occluded fronts have an area of warm air aloft.

• Rainbands in advance of warm occluded fronts and warm fronts are associated with weak upward motion, and tend to be wide and stratiform in nature.

• 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.

• 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.