Station list     Available data
ILLINOIS RIVER BASIN


414655088102300                         NAPERVILLE NORTH OPERATIONS CENTER AT NAPERVILLE, IL



LOCATION.--Latitude 41°46'55", Longitude 88°10'23", in NE1/4NW1/4NE1/4 sec.14, T.38 N., R.09 E., Du Page County.

PERIOD OF RECORD.--July 1997 to current year.

GAGE.--A 6-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, 2.71 in., August 4, 1998.

MAXIMUM FOR CURRENT YEAR.--Maximum, 2.30 in., estimated, 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 1.34 e0.57 0.00 0.00
2 e.56 .00 .00 .00 .12 .13 .00 .00 .02 .00 .00 .00
3 e.01 .00 .00 .00 .00 .00 .03 .00 .00 .02 .00 .00
4 .00 .00 .00 .00 .01 .00 .09 .02 .00 .00 .00 .00
5 e.60 .00 .00 .00 .04 s.03 .04 .03 .00 .00 .00 .00
6 e.25 .00 e.94 .00 .00 s.01 .03 .47 .02 .00 .00 .00
7 .00 .00 .00 .00 .00 .00 .00 .03 .00 .00 .18 .00
8 .00 e.06 .00 .00 .00 .00 .86 .00 .00 .00 .00 .00
9 .00 e.31 .00 .00 .00 s.02 .08 .00 .00 .02 .01 .00
10 .00 e.68 .00 .00 .00 s.35 .04 .00 e.09 .00 .00 .00
11 .00 .00 .00 .00 .38 .00 .00 .91 e1.10 .00 .00 .00
12 .00 .00 .00 .00 .00 .00 .00 .42 e.86 .00 .43 .23
13 .00 .00 .00 .00 .00 .00 .00 .02 e1.14 .00 .02 .00
14 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00
15 e.04 .00 .00 .00 .00 .00 .80 .00 .00 .00 .00 .00
16 .00 .00 .00 e.21 .05 .00 .50 .00 .00 .00 .00 .00
17 e2.30 .00 .00 e.36 .00 .00 .00 .80 .00 .18 .00 .00
18 e.20 .00 .00 .00 .00 .00 .04 .03 .00 .00 .08 .00
19 .00 .00 .00 .00 .00 .00 .00 .00 .00 .32 .80 .13
20 .00 .00 .00 .00 .00 .00 .07 .00 .00 .47 .00 .00
21 .00 .00 .00 e.64 .00 .00 .00 1.24 .00 .06 .00 .00
22 .00 .00 .00 e.39 .00 .00 .92 .03 .12 .00 .00 .00
23 .00 .00 .00 e.83 .00 .00 .26 .17 .56 e.86 .29 .00
24 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .80 .00
25 .00 e.01 .00 .00 s.06 .00 .00 .00 .00 .00 .21 .00
26 .00 .00 .00 .00 .26 .00 .00 .00 .00 .00 .00 .00
27 e.55 .00 .00 .00 .19 .00 1.55 .00 .43 .00 .00 .44
28 e.01 .00 .00 .06 .02 .00 .00 .00 .01 .00 .00 1.40
29 e.12 .00 .00 .00 -- .00 .00 .00 .00 .00 .00 .10
30 e.01 e.38 .00 .00 -- .00 .00 .00 .00 .00 .00 .00
31 .00 -- .00 .01 -- .00 -- .03 -- .00 .00 --

TOTAL 4.65 1.44 0.94 2.50 1.15 0.54 5.31 4.20 5.69 2.50 2.82 2.30
s Snowfall-affected precipitation
e Estimated


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data