Station list     Available data
ILLINOIS RIVER BASIN


415037088110600             BLACKWELL FOREST PRESERVE NEAR WARRENVILLE, IL



LOCATION.--Latitude 41°50'37", longitude 88°11'06", in SW1/4SW1/4SW1/4 sec.23, T.39 N., R.9 E., Du Page County.

PERIOD OF RECORD.--July 18, 1997 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, 2.68 in., July 3, 1998.

MAXIMUM FOR WATER YEAR 1997.--Maximum recorded, 1.50 in., August 12, 1997.

MAXIMUM FOR WATER YEAR 1998.--Maximum, 2.68 in., July 3, 1998.
RAINFALL, IN INCHES, WATER YEAR OCTOBER 1996 TO SEPTEMBER 1997
DAILY TOTAL VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 -- -- -- -- -- -- -- -- -- -- 0.00 0.00
2 -- -- -- -- -- -- -- -- -- -- .00 .00
3 -- -- -- -- -- -- -- -- -- -- 1.34 .01
4 -- -- -- -- -- -- -- -- -- -- .55 .01
5 -- -- -- -- -- -- -- -- -- -- .00 .01
6 -- -- -- -- -- -- -- -- -- -- .00 .00
7 -- -- -- -- -- -- -- -- -- -- .00 .01
8 -- -- -- -- -- -- -- -- -- -- .00 .02
9 -- -- -- -- -- -- -- -- -- -- .05 .00
10 -- -- -- -- -- -- -- -- -- -- .07 .00
11 -- -- -- -- -- -- -- -- -- -- .80 .00
12 -- -- -- -- -- -- -- -- -- -- 1.50 .00
13 -- -- -- -- -- -- -- -- -- -- .00 .00
14 -- -- -- -- -- -- -- -- -- -- .00 .00
15 -- -- -- -- -- -- -- -- -- -- .43 .00
16 -- -- -- -- -- -- -- -- -- -- .51 .76
17 -- -- -- -- -- -- -- -- -- -- .76 .20
18 -- -- -- -- -- -- -- -- -- e.36 .00 .00
19 -- -- -- -- -- -- -- -- -- .00 .01 .45
20 -- -- -- -- -- -- -- -- -- .00 .00 .01
21 -- -- -- -- -- -- -- -- -- .01 .00 .00
22 -- -- -- -- -- -- -- -- -- .02 .00 .04
23 -- -- -- -- -- -- -- -- -- .00 .07 .05
24 -- -- -- -- -- -- -- -- -- .00 .01 .00
25 -- -- -- -- -- -- -- -- -- .00 .00 .00
26 -- -- -- -- -- -- -- -- -- .00 .00 .00
27 -- -- -- -- -- -- -- -- -- .00 .00 .00
28 -- -- -- -- -- -- -- -- -- .00 .02 .00
29 -- -- -- -- -- -- -- -- -- .00 .00 .00
30 -- -- -- -- -- -- -- -- -- .00 .00 .00
31 -- -- -- -- -- -- -- -- -- .00 .00 --

TOTAL -- -- -- -- -- -- -- -- -- -- 6.12 1.57
e Estimated
RAINFALL, IN INCHES, WATER YEAR OCTOBER 1997 TO SEPTEMBER 1998
DAILY TOTAL VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
1 0.00 0.05 e0.00 0.00 0.15 0.00 0.15 0.01 0.00 0.00 0.00 0.00
2 .00 .02 .00 .00 .00 s.02 .00 .02 .00 .00 .00 .00
3 .00 .08 .15 .39 .00 s.03 .00 .04 .12 2.68 .03 .08
4 .05 .00 .00 .32 .00 .00 .00 .03 .00 .01 2.03 .00
5 .01 .13 .00 .36 .00 .00 .00 .23 .08 .00 .50 .00
6 .00 .17 .00 .38 .01 .02 .00 e.39 .00 .00 .01 .66
7 .00 .00 .00 .03 .00 .01 .65 e1.79 .00 .31 .95 1.82
8 .00 .00 .00 s.21 .00 .69 .56 e.06 .07 .00 .00 .00
9 .21 .00 s.11 s.01 .00 s.21 .02 .00 1.26 .00 .00 .00
10 .00 s.02 s.29 .00 .04 .00 .00 .00 .01 .00 .00 .00
11 .00 .00 .00 .00 .62 .00 .00 .01 1.25 .00 .00 .00
12 .00 .00 .00 .00 .00 .00 .10 .07 .00 .00 .00 .00
13 .63 .00 .00 .00 .00 .00 .19 .01 .00 .00 .00 .00
14 .01 s.02 .00 .00 .00 .00 .00 .00 .04 .00 .09 .71
15 .00 .01 .00 .00 .00 .00 .37 .02 .00 .00 .00 .02
16 .00 .00 .00 .00 e.30 .00 .57 .00 .01 .00 .00 .00
17 .00 s.03 .00 .00 .08 .52 .00 .00 .00 .00 .00 .00
18 .00 s.12 .00 .00 .00 .34 .00 .00 .53 .00 .00 .00
19 .00 .00 .00 .00 .00 .04 .00 .00 .00 .33 .00 .00
20 .00 .00 .00 .00 .02 .00 .70 .00 .00 .00 .00 .05
21 .00 .00 .00 .00 .00 .00 .08 .00 .00 .01 .02 .00
22 .00 .00 .11 .00 .00 .00 .00 .00 .00 .12 .00 .00
23 .00 .00 .00 .00 .00 .02 .00 .28 .00 .00 .00 .00
24 .22 .00 s.27 .00 .09 .00 .00 .87 .00 .00 .39 .00
25 .00 .00 s.16 .00 .00 .00 .11 .01 .00 .00 .48 .01
26 .90 .00 .00 s.28 .00 .00 .34 .00 e1.07 .00 .00 .00
27 s.08 e.20 .00 s.07 .18 .00 .00 .00 .00 .00 .00 .00
28 .00 e.06 .00 .00 .02 .22 .01 .18 .24 .00 .46 .00
29 .00 e.22 .00 s.03 -- .01 .25 .03 .09 .00 .00 .17
30 .00 e.01 .00 .00 -- .00 .00 .00 .00 .00 .00 .45
31 .00 -- .00 .00 -- .92 -- .00 -- .00 .00 --

TOTAL 2.11 1.14 1.09 2.08 1.51 3.05 4.10 4.05 4.77 3.46 4.96 3.97
s Snowfall-affected precipitation
e Estimated


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data