Station list     Available data
ILLINOIS RIVER BASIN


415131088143600                         NATIONAL ACCELERATOR NEAR WEST CHICAGO, IL



LOCATION.--Latitude 41°51'31", longitude 88°14'36", in NW1/4SW1/4SW1/4 sec.17, T.39 N., R.9 E., Du Page County, on the east side of McChesney Road, just south of the Burlington Northern Railroad tracks near West Chicago.

PERIOD OF RECORD.--April 1989 to October 1995 and July 1997 to current year.

GAGE.--A 12-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, 3.62 in., June 23, 1994, but may have been greater during periods of missing record.

MAXIMUM FOR CURRENT YEAR.--Maximum, 2.74 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 0.01 0.00 0.00 0.00 0.00 1.93 0.44 0.00 0.00
2 .60 .00 .00 .00 .15 .16 .00 .00 .05 .00 .00 .00
3 .02 .02 .00 .00 .01 .00 .01 .00 .00 .03 .00 .00
4 .00 .00 .00 .00 .00 .00 .19 .06 .00 .00 .00 .00
5 .62 .00 .00 .00 .05 .00 .04 .02 .00 .00 .00 .00
6 .28 .00 .92 .00 .00 s.02 .00 .46 .00 .00 .00 .00
7 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 e.26 .00
8 .00 .08 .01 .00 .01 .00 1.14 .00 .00 .00 .00 .00
9 .00 .36 .00 .00 .00 .00 .34 .00 .01 .95 .00 .00
10 .01 1.15 .00 .00 .00 s.24 .18 .00 .17 .00 .00 .00
11 .00 .00 .00 .00 .48 s.09 .00 1.32 1.28 .00 .00 .00
12 .00 .00 .00 .00 .00 s.02 .00 .38 .05 .00 e.33 e.38
13 .01 .00 .00 .00 .00 .00 .00 .01 1.57 .00 e.03 .00
14 .02 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .01
15 .06 .00 .00 .00 .00 .00 .77 .02 .00 .00 .00 .00
16 .06 .00 .00 s.06 .05 .00 .35 .01 .00 .00 .01 .00
17 2.74 .00 .00 .43 .00 .00 .00 .80 .00 .26 .00 .00
18 .29 .00 .00 .00 .00 .00 .06 .07 .00 .00 .10 .00
19 .00 .00 .00 .00 .00 .00 .00 .00 .00 .10 .58 .13
20 .00 .00 .00 .00 .00 .00 .10 .00 .00 1.24 .00 .00
21 .00 .00 .00 .71 .00 .00 .14 1.12 .00 .35 .00 .01
22 .00 .00 .00 .62 .00 .00 1.42 .00 .00 .00 .00 .00
23 .00 .00 .00 .81 .00 .00 .37 .18 .17 .00 .39 .00
24 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .11 .00
25 .00 .01 .00 .00 s.11 .00 .00 .00 .00 .00 .61 .00
26 .00 .00 .00 .01 .24 .00 .00 .00 .00 .00 .00 .00
27 .71 .00 .00 .00 .17 .00 1.28 .00 .16 .00 .00 .67
28 .00 .00 .00 .00 .02 s.02 .00 .00 .08 .00 .00 2.57
29 .01 .00 .00 .00 -- s.01 .00 .00 .00 .00 .00 .07
30 .00 .47 .00 .00 -- .00 .00 .20 .00 .00 .00 .00
31 .00 -- .00 .01 -- .00 -- .02 -- .00 .00 --

TOTAL 5.43 2.10 0.93 2.66 1.29 0.56 6.39 4.67 5.47 3.37 2.42 3.84
s Snowfall-affected precipitation
e Estimated


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data