Station list     Available data
ILLINOIS RIVER BASIN


414652088133800                         NAPERVILLE TOWNSHIP HIGHWAY DIVISION AT NAPERVILLE, IL



LOCATION.--Latitude 41°46'52", longitude 88°13'59", SE1/4NE1/4NE1/4 sec.17, T.38 N., R.09 E., Du Page County.

PERIOD OF RECORD.--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.

MAXIMUM FOR PERIOD OF RECORD.--Maximum, 2.73 in., August 4, 1998.

MAXIMUM FOR CURRENT YEAR.--Maximum, 1.84 in., October 17, 1998.
RAINFALL, IN INCHES, WATER YEAR OCTOBER 1998 TO SEPTEMBER 1999
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 0.00 0.00 0.00 0.00 0.02 0.00 0.00 0.00 1.59 e0.55 0.00 0.00
2 .54 .01 .00 .00 .10 .14 .00 .00 .00 .00 .00 .00
3 .01 .00 .00 .00 .01 .00 .00 .00 .00 .00 .00 .00
4 .00 .01 .00 .00 .00 .00 e.14 .02 .00 .00 .00 .00
5 .74 .00 .00 .00 .03 .00 e.06 .00 .00 .00 .00 .00
6 .22 .00 .97 .00 .00 s.01 e.01 .40 .01 .00 .00 .00
7 .00 .00 .01 .00 .00 .00 .00 .03 .00 .00 .18 .00
8 .00 .05 .00 .00 .00 .00 .88 .00 .01 .00 .00 .00
9 .00 .23 .00 .00 .00 s.03 .09 .00 .00 e.78 .00 .00
10 .00 .49 .00 .00 .00 s.13 .02 .00 .04 .00 .00 .00
11 .00 .00 .00 .00 e.39 s.05 .01 .66 .85 .00 .00 .00
12 .00 .00 .00 .00 .00 s.08 .00 .47 .07 .00 .28 e.36
13 .00 .00 .00 .00 .00 .00 .00 .02 .99 .00 .02 .00
14 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01 .00
15 .03 .00 .00 .00 .00 .00 .66 .01 .00 .00 .00 .00
16 .01 .00 .00 s.36 .02 .00 .39 .00 .00 .00 .00 .00
17 1.84 .00 .00 .35 .00 .00 .00 .37 .00 e.16 .00 .00
18 .16 .00 .00 .01 .00 .00 .02 .04 .00 .00 .04 .00
19 .00 .00 .00 .00 .00 .00 .00 .00 .00 e.09 .56 e.10
20 .00 .00 .00 .00 .00 .00 .06 .00 .00 e1.02 .00 .00
21 .00 .00 .00 .76 .00 .00 .01 e1.09 .00 e.26 .00 .00
22 .00 .00 .00 .40 .00 .00 .85 .02 .07 .00 .00 .00
23 .00 .00 .00 .83 .00 .00 .29 .09 .10 1.45 .56 .00
24 .00 .00 .00 .02 .00 .00 .00 .00 .00 .01 .30 .00
25 .00 .00 .00 .00 s.01 .00 .00 .00 .00 .00 .35 .00
26 .00 .00 .00 .00 .17 .00 .00 .00 .00 .00 .00 .00
27 .57 .00 .00 .00 .11 .00 1.38 .00 .00 .00 .00 e.53
28 .01 .00 .00 .00 .03 .00 .01 .02 .00 .00 .00 e1.93
29 .08 .00 .00 .00 -- .00 .00 .00 .00 .00 .00 e.07
30 .00 .36 .00 .00 -- .00 .00 .00 .00 .00 .00 .00
31 .00 -- .00 .01 -- .00 -- .09 -- .00 .00 --

TOTAL 4.21 1.15 0.98 2.74 0.89 0.44 4.88 3.33 3.73 4.32 2.30 2.99
s Snowfall-affected precipitation
e Estimated


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data