Does the external baffle trap debris, pine needles and other weather elements? Will the external baffle clog?

Generally, leaves and debris that can fall in behind the external baffle are not a concern because of the low pressure created by the external baffle when wind hits it -- essentially self-cleaning the ridge vent.

Generally, leaves and debris that can fall in behind the external baffle are not a concern because of the low pressure created by the external baffle when wind hits it -- essentially self-cleaning the ridge vent. In Air Vent's YouTube video you can see in the wind driven rain tests that there is a significant amount of low pressure created which can draw water up and out of the ridge vent. Thus, leaves and debris are not an issue. Another benefit to Air Vent's design is that it does not have any external ribs perpendicular to the external baffle. This allows leaves or debris to blow down the ridge vent parallel to the ridge and eventually be blown out the end of the ridge vent run. In cases where there is little or no wind (middle of a dense forest, for example) pine needles and debris that fall and stick behind the external baffle will not be pulled out. In these cases shingle manufacturers require that the roof be cleaned off because the pine needles and debris left on the roof can degrade the shingles prematurely. If the roof is being maintained for the shingles the ridge vent should be cleared at the same time.