Station list     Available data
ILLINOIS RIVER BASIN


414613088091000                         NAPERVILLE MUNICIPAL BUILDING AT NAPERVILLE, IL



LOCATION.--Latitude 41°46'13", longitude 88°09'10", in SE1/4SW1/4SE1/4 sec.13, 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, 3.91 in., August 4, 1998.

MAXIMUM FOR CURRENT YEAR.--Maximum, 3.02 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 0.01 0.00 0.00 0.03 0.00 0.00 0.00 1.39 0.68 0.00 0.00
2 .67 .00 .00 .00 .15 .15 .00 .00 .03 .00 .00 .00
3 .02 .00 .00 .00 .01 .00 .03 .00 .00 .00 .00 .00
4 .00 .03 .00 .00 .01 .00 .11 .05 .00 .00 .00 .00
5 .43 .00 .00 .00 .05 s.03 .06 .06 .00 .00 .00 .00
6 .27 .00 1.11 .00 .00 .00 .04 .51 .06 .00 .00 .00
7 .00 .00 .00 .00 .00 s.09 .00 .02 .00 .00 .08 .00
8 .00 .05 .00 .00 .00 .00 1.10 .00 .00 .00 .00 .00
9 .00 .33 .00 .00 .00 .00 .08 .00 .00 .12 .02 .00
10 .00 1.14 .00 .00 .00 s.22 .12 .00 .25 .00 .00 .00
11 .00 .00 .00 .00 .50 s.04 .01 1.25 1.16 .00 .00 .00
12 .00 .00 .00 .00 .00 .00 .00 .46 .10 .00 .46 .24
13 .00 .00 .00 .00 .00 .00 .00 .03 .81 .00 .03 .00
14 .00 .00 .01 .00 .00 .00 .00 .00 .00 .00 .00 .00
15 .03 .00 .00 .00 .00 .00 1.02 .00 .00 .00 .00 .00
16 .00 .00 .00 s.13 .06 .00 .54 .00 .00 .00 .00 .00
17 3.02 .00 .00 .48 .00 .00 .00 .78 .00 .19 .00 .00
18 .27 .00 .00 .00 .00 .00 .04 .07 .00 .00 .06 .00
19 .00 .00 .00 .00 .00 .00 .00 .00 .00 .23 .90 .10
20 .00 .00 s.03 .02 .00 .00 .08 .00 .00 .34 .00 .00
21 .00 .00 .00 .72 .00 .00 .00 1.25 .00 .05 .00 .00
22 .00 .00 .00 .39 .00 .00 1.02 .04 .42 .00 .00 .00
23 .00 .00 .00 .84 .00 .00 .27 .19 .71 .33 .33 .00
24 .00 .00 .00 .02 .00 .00 .00 .00 .00 .01 1.10 .00
25 .00 .02 .00 .00 s.11 .00 .00 .00 .00 .00 .67 .00
26 .00 .00 .00 .00 .31 .00 .00 .00 .00 .00 .00 .00
27 .51 .00 .00 .00 .19 .00 1.65 .00 .10 .00 .00 .60
28 .01 .00 .00 .00 .07 s.02 .01 .00 .02 .00 .00 1.58
29 .07 .00 s.03 .00 -- .00 .00 .00 .00 .00 .00 .12
30 .02 .44 .00 .00 -- .00 .00 .00 .00 .00 .00 .00
31 .00 -- .00 .02 -- .00 -- .03 -- .00 .00 --

TOTAL 5.32 2.02 1.18 2.62 1.49 0.55 6.18 4.74 5.05 1.95 3.65 2.64
s Snowfall-affected precipitation


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data