Evaluate Chicago’s current annual March–May, June–August, and September–November water balances. What is the annual surplus or deficit? What are Chicago’s projected annual March–May, June– August, and September–November water balances? What is the annual surplus or deficit? Which months have the greatest projected surplus? Which months have the greatest projected deficits?

Chicago, Illinois

Latitude 41.81°N

Longitude 87.68°W

Elevation 182 m

Population 2,714,856




Current March-May is a surplus of 11.3 cm, projected is a 14 cm surplus. Current June-August is a 14.7 deficit, projected is a 58.3 cm deficit. Current September-November is a 9.5 cm surplus, projected is a 6 cm surplus. The current annual budget is a 21.4 cm surplus, projected is a 19.1 cm deficit. The summer months have the greatest deficit of 58.3 cm.

Environmental & Atmospheric Sciences

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