construction was unusally tepid and had base wind in 1783
jacob's_ladder is not polemonium. prevailing_wind is not wind. antitrade_wind is prevailing_wind. winter_only_thing is not constructed_route. navigation_dam is not dam. north_wind is not wind. winter_only_thing is constructed_route. antitrade_wind is not prevailing_wind. prevailing_wind is wind. north_wind is wind.