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Encyclopedia Dubuque


"Encyclopedia Dubuque is the online authority for all things Dubuque, written by the people who know the city best.”
Marshall Cohen—researcher and producer, CNN

Affiliated with the Local History Network of the State Historical Society of Iowa, and the Iowa Museum Association.


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BAROMETER. Since 1975 the most distinctive feature of the American Trust Building is its gigantic barometer which signals forecasts of the National Weather Service. Looking like a large lighted arrow from a distance, the instrument is wrapped by bands of red neon and topped by a cube that alternates between white, green or red.

Rising temperatures are shown when the red bands flash from the bottom to the top of the tower. Falling temperatures are shown when the bands flash from the top to the bottom. Steady temperatures are indicated by the red neon being lit continuously. The cube at the top shows white for clear weather, green for clouds, red for rain, and flashing for snow.