Wow, last night's rain was officially epic:
The rate at which rain fell across the Midwest Monday was extraordinary in a number of locations.
Highland, Park’s 98 mm fell between 6 and 11:59 p.m. In just a fraction of that period, Midway Airport logged 20 mm. It fell in just 7 minutes! Lake In the Hills , IL received 66 mm in just 2 hours.
But rainfall rates west in Iowa were even more dramatic. Williamstown received 133 mm in the day’s 3 waves of rainfall while 114 mm of Muscatine, Iowa’s 207 mm of rain fell between 7 and 8 p.m.
Yes, 207 mm fell on a town in Iowa. That's 207 liters of water per square meter of ground, which works out to 8,280 tons—almost 8.3 million liters—of water per Chicago city block. (A Chicago city block is 200 meters to a side.)
Ah. My air boat has arrived. Off to work now...