The present loading dock rainshield has a self-adjusting, weighted canopy seal with a header projecting from the building to support a flexible, dual fixed-end, downwardly looped, central curtain. The central curtain spans the dominant width of the header and loops from front to back. The center curtain joins with opposed pleated side curtains to compete the front seal. The downwardly looped central curtain has a series of staggered and overlapping weighted baffles proximal its front end. When a trailer backs into the dock, the trailer top engages one or more baffles, which ride up onto the top of the trailer. The elongated weighted baffles push rainwater off the trailer top as it backs into the bay, and remain in forced sealing engagement with the trailer top when it is parked to divert water off the trailer top and prevent the water from flowing or blowing into the bay.

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