Station list     Available data
ILLINOIS RIVER BASIN


414843088042500                         MORTON ARBORETUM NEAR LISLE, IL



LOCATION.--Latitude 41°48'43", longitude 88°04'25", in SE1/4NE1/4NE1/4 sec.3, T.38 N., R.10 E., Du Page County, on the roof of the main office building of Morton Arboretum near Lisle.

PERIOD OF RECORD.--June 1989 to November 1991 and 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, 2.60 in., October 17, 1998, but may have been greater during periods of missing record.

MAXIMUM FOR CURRENT YEAR.--Maximum, 2.60 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 0.00 0.00 0.00 0.03 0.00 0.00 0.00 1.31 0.45 0.00 0.00
2 .56 .00 .00 .00 .15 .12 .00 .00 .11 .00 .00 .00
3 .00 .01 .00 .00 .00 .00 .00 .00 .00 .01 .00 .00
4 .00 .06 .00 .00 .00 .00 .08 .04 .00 .00 .00 .00
5 e.61 .00 .00 .00 .02 .00 .03 .02 .00 .00 .00 .00
6 e.30 .00 .98 .00 .00 .00 .03 .32 .28 .00 .00 .00
7 .00 .00 .00 .00 .00 .00 .00 .01 .00 .00 .20 .00
8 .00 .04 .00 .00 .00 .00 1.10 .00 .00 .00 .00 .00
9 .00 .36 .00 .00 .00 s.02 .06 .00 .00 .20 .00 .00
10 .00 .72 .00 .00 .00 s.47 .17 .00 .03 .00 .00 .00
11 .00 .00 .00 .00 .35 s.01 .01 1.21 .69 .00 .00 .00
12 .00 .00 .00 .00 .00 .00 .00 .38 .10 .00 .39 .27
13 .00 .00 .00 .00 .00 .00 .00 .01 .92 .00 .06 .00
14 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00 .00
15 .04 .00 .00 .00 .00 .00 1.13 .00 .00 .00 .00 .00
16 .00 .00 .00 s.31 .04 .00 .45 .00 .00 .00 .00 .00
17 2.60 .00 .00 .45 .00 .00 .00 .63 .00 .17 .00 .00
18 .23 .00 .00 .00 .00 .00 .05 .04 .00 .00 .03 .00
19 .00 .00 .00 .00 .00 .00 .00 .00 .00 .11 .43 .05
20 .00 .00 s.01 .00 .00 .00 .06 .00 .00 .21 .00 .00
21 .00 .00 s.01 .75 .00 .00 .00 1.16 .00 .37 .00 .01
22 .00 .00 .00 .40 .00 .00 1.54 .02 .50 .00 .00 .00
23 .00 .00 .00 .76 .00 .00 .34 .16 .46 .15 .34 .00
24 .00 .00 .00 .01 .00 .00 .00 .00 .00 .01 .93 .00
25 .00 .00 .00 .00 s.10 .00 .00 .00 .00 .00 .33 .00
26 .00 .00 .00 .00 .20 .00 .00 .00 .00 .00 .00 .00
27 .49 .00 .00 .00 .27 .00 1.40 .00 .53 .00 .00 .64
28 .01 .00 .00 .00 .02 .00 .01 .00 .08 .00 .00 1.58
29 .05 .00 s.01 .00 -- .00 .00 .00 .00 .00 .00 .14
30 .02 .39 .00 .00 -- .00 .00 .00 .00 .00 .00 .00
31 .00 -- .00 .00 -- .00 -- .00 -- .00 .00 --

TOTAL 4.91 1.58 1.01 2.68 1.18 0.62 6.46 4.00 5.01 1.68 2.71 2.69
s Snowfall-affected precipitation
e Estimated


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data