LOCATION.-- Latitude 41°53'56", longitude 87°57'50" (NAD of 1927), in SE1/4SW1/4NE sec.3, T.39 N., R.11 E., Du Page County, Hydrologic Unit 07120004, on the Du Page County Flood Control Project service road 50 ft west of State Highway 83, and located on top of the flood control building at Elmhurst.

PERIOD OF RECORD.--

PRECIPITATION: July 1997 to current year.

GAGE.-- An 8-in.-diameter, unheated, tipping-bucket rain gage.

REMARKS.-- Snowfall-affected data can result during cold weather when snow fills the rain-gage funnel and then melts as temperatures rise. Snowfall-affected data are subject to appreciable errors.

EXTREMES FOR PERIOD OF RECORD.--

PRECIPITATION: Maximum daily total, 2.78 in., October 17, 1998.