Station list     Available data
ILLINOIS RIVER BASIN


05540130                         WEST BRANCH DU PAGE RIVER NEAR NAPERVILLE, IL



LOCATION.--Latitude 41°43'13", longitude 88°07'55", in SE1/4SW1/4NE1/4 sec. 6, T.37 N., R.10 E., Will County, on downstream side of Washington Street bridge, on center pier, 3.5 mi southeast of Naperville.

PERIOD OF RECORD.--May 1989 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, 5.34 in., August 4, 1998, but may have been greater during periods of missing record.

MAXIMUM FOR CURRENT YEAR.--Maximum, 3.06 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 0.02 0.00 0.00 0.02 0.01 0.00 0.00 1.46 0.64 0.00 0.00
2 .61 .00 .00 .00 .15 .28 .00 .00 .01 .00 .00 .00
3 .01 .00 .00 .00 .02 .05 .02 .00 .00 .00 .00 .00
4 .00 .02 .00 .00 .00 .00 .14 .03 .00 .00 .00 .00
5 .24 .00 .00 .00 .03 .02 .04 .03 .00 .00 .00 .00
6 .24 .00 1.14 .00 .00 .00 .02 .44 .27 .00 .00 .00
7 .01 .00 .00 .00 .00 .00 .00 .01 .00 .00 .28 .00
8 .00 .06 .01 .00 .00 .00 1.09 .00 .00 .00 .00 .00
9 .00 .50 .00 .00 .00 s.05 .10 .00 .00 .06 .02 .00
10 .00 .63 .00 .00 .00 s.06 .09 .00 .14 .00 .00 .00
11 .00 .00 .00 .00 e.30 s.03 .02 1.93 1.01 .00 .00 .00
12 .00 .00 .00 .00 .00 s.22 .00 .24 .13 .00 .50 .24
13 .00 .00 .00 .00 .00 s.02 .00 .03 1.24 .00 .04 .00
14 .00 .00 .00 .00 .00 s.05 .00 .00 .00 .00 .00 .00
15 .05 .00 .00 .00 .00 .00 1.10 .00 .00 .00 .00 .00
16 .00 .00 .00 s.01 e.05 .00 .56 .00 .00 .00 .00 .00
17 3.06 .00 .00 .03 .00 .00 .00 .61 .00 .31 .00 .10
18 .23 .00 .00 .00 .00 .00 .02 .06 .00 .00 .09 .00
19 .00 .00 .00 .00 .00 .00 .00 .00 .00 .43 1.23 .20
20 .00 .00 s.01 .03 .00 .00 .08 .00 .00 .95 .00 .00
21 .00 .00 s.01 .37 .00 .00 .11 .96 .00 .03 .00 .00
22 .00 .00 .00 .07 .00 .00 .99 .01 .20 .05 .00 .00
23 .00 .00 .00 .88 .00 .00 .20 .31 .31 .38 .73 .00
24 .00 .00 .00 .07 .00 .00 .00 .00 .01 .00 1.32 .00
25 .00 .04 .00 .01 s.11 .00 .00 .00 .00 .00 .24 .00
26 .00 .00 .00 .00 .41 .00 .00 .00 .00 .01 .00 .00
27 .47 .01 .00 .00 .01 .00 2.24 .00 .20 .00 .00 .56
28 .00 .00 .00 .00 .08 .01 .01 .07 .00 .00 .00 2.12
29 .31 .00 s.03 .00 -- .00 .00 .00 .00 .00 .00 .13
30 .04 .38 .00 .00 -- .00 .00 .00 .00 .00 .00 .00
31 .00 -- .00 .01 -- .00 -- .07 -- .00 .00 --

TOTAL 5.27 1.66 1.20 1.48 1.18 0.80 6.83 4.80 4.98 2.86 4.45 3.35
s Snowfall-affected precipitation
e Estimated


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data