05535000 DATA: Discharge Tables, 2001

Station list Available data
ILLINOIS RIVER BASIN

05535000 SKOKIE RIVER AT LAKE FOREST, IL

LOCATION.-- Lat 42°13'57", long 87°50'41", in NW1/4SW1/4 sec.4, T.43 N., R.12 E., Lake County, Hydrologic Unit 07120003, on right bank at upstream side of bridge on Westleigh Road at Lake Forest and at mile 13.1.

DRAINAGE AREA.-- 13.0 mi².

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: October 1951 to current year. Prior to October 1952, records published with those for streams in the St. Lawrence River Basin (WSP 1237).

STAGE: Water years 1994-2001.

REVISED RECORDS.-- WDR IL-75-1: Drainage area.

GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 648.75 ft above sea level.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 496 ft³/s, Feb. 21, 1997, gage height, 7.24 ft; maximum gage height, 8.35 ft, July 22, 1982; no flow many days in 1959.

REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor.

DISCHARGE, IN CUBIC FEET PER SECOND, WATER YEAR OCTOBER 2000 TO SEPTEMBER 2001 DAILY MEAN VALUES
DAY	OCT	NOV	DEC	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP

1	18	.62	5.3	e2.9	35	15	7.7	1.2	44	.30	e.43	.91
2	5.1	1.4	5.1	e2.8	24	14	4.8	1.0	41	.23	e26	.72
3	3.3	1.2	3.7	e2.9	21	13	3.4	.51	26	.24	e10	.47
4	79	.77	2.7	e3.0	11	9.3	2.7	.45	18	.51	e2.5	.39
5	39	.73	2.2	e3.2	6.7	6.4	7.8	.66	29	.28	e2.3	.39

6	50	3.7	1.5	e3.4	4.7	5.3	28	.41	25	.13	e1.8	1.1
7	26	34	e1.2	e3.5	4.3	3.9	16	7.6	18	47	.20	6.4
8	15	14	e1.1	e3.4	24	2.5	15	4.0	12	11	.18	3.7
9	6.4	79	e1.0	e3.4	224	2.0	19	1.6	8.6	6.0	10	10
10	4.2	49	.93	e3.6	115	1.9	11	13	6.1	2.0	18	7.5

11	2.7	24	e.92	e4.0	51	4.2	43	160	4.4	1.1	2.3	3.5
12	2.0	17	e.98	e5.3	33	6.5	55	51	73	.72	1.1	1.6
13	1.4	19	e1.0	7.5	26	8.0	26	27	37	.49	2.2	.69
14	1.0	13	e1.3	10	28	5.9	18	68	22	.40	.84	.47
15	.85	8.4	e2.1	22	24	27	16	64	16	.32	.34	.33

16	.89	5.2	e2.5	24	21	33	14	32	11	.32	22	.31
17	.75	3.4	e2.8	20	16	29	12	20	8.2	23	8.5	.39
18	e1.0	2.2	e2.8	18	18	27	7.9	13	8.7	10	4.0	.61
19	e1.2	1.8	e2.7	13	11	29	4.7	8.5	2.7	4.9	36	255
20	e1.3	1.6	e2.5	6.9	11	27	16	6.4	1.5	1.9	11	87

21	e1.3	2.2	e2.3	e5.4	9.6	26	24	8.8	2.5	1.1	6.4	80
22	e1.2	.84	e2.2	e4.3	11	20	18	5.8	2.1	5.1	24	43
23	e1.7	.62	e2.1	3.4	4.0	15	22	3.7	1.5	8.8	37	61
24	e3.4	.56	e2.0	e3.0	34	11	14	6.7	1.2	5.8	16	49
25	e2.5	.88	e2.0	e2.7	81	6.7	8.7	3.2	1.0	5.5	19	29

26	e1.5	7.2	e2.0	2.4	40	4.0	5.4	11	.99	3.7	14	22
27	e3.4	4.6	e2.1	3.4	28	3.1	3.1	74	.75	1.3	5.0	19
28	e2.8	3.5	e2.2	5.0	19	3.4	2.2	48	.56	.63	4.3	17
29	e1.5	4.8	e2.4	9.7	---	2.8	1.5	36	.45	.50	2.2	16
30	e.84	4.4	e2.7	53	---	3.7	1.2	21	.37	.43	1.1	14

31	e1.0	---	e2.9	47	---	4.6	---	19	---	.63	2.5	---

TOTAL	280.23	309.62	69.23	302.1	935.3	370.2	428.1	717.53	423.62	144.33	291.19	731.48
MEAN	9.04	10.3	2.23	9.75	33.4	11.9	14.3	23.1	14.1	4.66	9.39	24.4
MAX	79	79	5.3	53	224	33	55	160	73	47	37	255
MIN	.75	.56	.92	2.4	4.0	1.9	1.2	.41	.37	.13	.18	.31
CFSM	.70	.79	.17	.75	2.57	.92	1.10	1.78	1.09	.36	.72	1.88
IN.	.80	.89	.20	.86	2.68	1.06	1.23	2.05	1.21	.41	.83	2.09

e Estimated

STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1952 - 2001, BY WATER YEAR (WY)
MEAN	7.11	10.4	10.9	9.85	13.7	22.5	24.9	15.4	12.5	8.36	7.21	8.51
MAX	30.0	44.5	53.7	42.4	35.5	82.3	56.9	54.3	41.6	33.3	41.7	61.7
(WY)	1987	1986	1983	1974	1997	1979	1983	1996	1996	1993	1972	1986
MIN	.83	.73	1.20	.29	1.08	4.01	5.95	2.26	.91	1.29	1.26	1.12
(WY)	1957	2000	1959	1959	1963	1956	1986	1988	1988	1991	1955	1979

SUMMARY STATISTICS	FOR 2000 CALENDAR YEAR		FOR 2001 WATER YEAR		WATER YEARS 1952 - 2001
ANNUAL TOTAL	5710.44		5002.93
ANNUAL MEAN	15.6		13.7		12.6
HIGHEST ANNUAL MEAN					22.2	1974
LOWEST ANNUAL MEAN					3.54	1963
HIGHEST DAILY MEAN	241	May 19	255	Sep 19	444	Sep 27 1986
LOWEST DAILY MEAN	.53	Sep 6	.13	Jul 6	.00	A
ANNUAL SEVEN-DAY MINIMUM	.92	Sep 1	.29	Jun 30	.00	Jan 3 1959
MAXIMUM PEAK FLOW			392	Sep 19	496 B	Feb 21 1997
MAXIMUM PEAK STAGE			6.44	Sep 19	8.35	Jul 22 1982
INSTANTANEOUS LOW FLOW			.11	C
ANNUAL RUNOFF (CFSM)	1.20		1.05		.97
ANNUAL RUNOFF (INCHES)	16.34		14.32		13.16
10 PERCENT EXCEEDS	37		34		28
50 PERCENT EXCEEDS	5.1		4.7		5.2
90 PERCENT EXCEEDS	1.3		.68		1.4

	A - Many days in 1959.
	B - Gage height, 7.24 ft.
	C - July 6, 7, August 8, 9.