LOCATION.-- Latitude 41°57'51", longitude 87°59'10" (NAD of 1927), in SE1/4SW1/4SE1/4 sec.9, T.40 N., R.11 E., Du Page County, Hydrologic Unit 07120004, on Irving Park Road 1.4 mi east of Walnut Road, and located on building east of the water tower of the Wood Dale Wastewater Treatment Facility at Wood Dale.

PERIOD OF RECORD.--

PRECIPITATION: July 1997 to current year.

GAGE.-- An 8-in. diameter, heated, 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, 3.66 in., October 13, 2001.