LOCATION.-- Latitude 41°41'58", longitude 88°09'56" (NAD of 1927), in SW1/4NW1/4SW1/4 sec.12, T. 37 N., R.09 E., Will County, Hydrologic Unit 07120004, on Naperville- Plainfield Road 2.0 mi south of 75th Street, and at the Spring Brook Wastewater Treatment Facility near Naperville.

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, 4.37 in., August 4, 1998.