Station list     Available data
ILLINOIS RIVER BASIN


415457088150600                         DU PAGE COUNTY AIRPORT NEAR ST CHARLES, IL



LOCATION.--Latitude 41°54'57", longitude 88°15'06", in NW1/4SW1/4SE1/4 sec. 30, T.40N., R.9 E., Du Page County.

PERIOD OF RECORD.--February 1986 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, 4.26 in., August 14, 1987, but may have been greater during periods of missing record.

MAXIMUM FOR CURRENT YEAR.--Maximum, 2.65 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 0.01 0.00 0.00 0.00 1.94 0.60 0.00 0.00
2 .48 .00 .00 .00 .13 .21 .00 .00 .03 .00 .00 .00
3 .00 .00 .00 .00 .00 .00 .00 .00 .00 .04 .00 .00
4 .00 .00 .00 .00 .00 .00 e.14 .03 .00 .00 .00 .00
5 .76 .00 .00 .00 .10 .00 e.05 .08 .00 .00 .00 .00
6 .26 .00 .97 .00 .00 .00 e.01 .33 .00 .00 .00 .00
7 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .14 .00
8 .00 .08 .00 .00 .00 .00 e1.11 .00 .00 .00 .00 .00
9 .00 .15 .00 .00 .00 .00 e.25 .00 .19 .78 .01 .00
10 .00 .82 .00 .00 .00 .00 e.14 .00 .10 .00 .00 .00
11 .00 .00 .00 .00 .52 .00 .00 .90 .84 .00 .00 .00
12 .00 .00 .00 .00 .00 .00 .00 .17 .00 .00 .28 .44
13 .00 .00 .00 s.02 .00 .00 .00 .00 1.50 .00 .02 .01
14 .01 .00 .00 .00 .00 .00 .00 .01 .01 .00 .00 .00
15 .06 .00 .00 .00 .00 .00 e.73 .00 .00 .00 .00 .00
16 e.03 .00 .00 s.01 .05 .00 e.36 .00 .00 .00 .00 .00
17 e2.65 .00 .00 .33 .00 .00 .00 .59 .00 .00 .00 .00
18 .26 .00 .00 .00 .00 .00 e.06 .03 .00 .00 .09 .00
19 .11 .00 .00 .00 .00 .00 .00 .00 .00 .02 .43 .10
20 .03 .00 .00 .00 .00 .00 e.12 .00 .00 1.05 .00 .00
21 .03 .00 .00 .47 .00 .00 e.26 1.11 .00 .27 .00 .00
22 .01 .00 .00 .30 .00 .00 e1.24 .01 .00 .00 .00 .00
23 .02 .00 .00 .66 .00 .00 e.42 .25 .00 1.02 e.40 .00
24 .01 .00 .00 .03 .00 .00 .00 .00 .00 .01 .01 .00
25 .01 .00 .00 .00 s.10 .00 .00 .00 .00 .00 .52 .00
26 .00 .00 .00 .00 .17 .00 .00 .00 .00 .04 .00 .00
27 .63 .00 .00 .00 .15 .00 e1.29 .00 .04 .00 .00 .60
28 e.01 .00 .00 .00 .05 s.01 .03 .00 .06 .00 .00 2.44
29 e.08 .00 s.01 .00 -- .00 .00 .00 .00 .00 .00 .03
30 .00 .48 .00 .00 -- .00 .00 .04 .00 .00 .00 .00
31 .00 -- .00 .00 -- .00 -- .01 -- .00 .00 --

TOTAL 5.45 1.53 0.98 1.82 1.28 0.22 6.21 3.56 4.71 3.83 1.90 3.62
s Snowfall-affected precipitation
e Estimated


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data