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LOCATION.-- Latitude 41°57'55", longitude 87°52'53" (NAD of 1927), in NE1/4NW1/4NW1/4 sec.16, T.40 N., R.12 E., Cook County, Hydrologic Unit 07120004, on Montrose Road 500 ft West of Mannheim Road, and located on the fence 100 ft past a guard house of the O'Hare Airport at Chicago. |
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PERIOD OF RECORD.-- |
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PRECIPITATION: October 1, 1998 to current year. |
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GAGE.-- An 8-in.-diameter, unheated, tipping-bucket rain gage. |
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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. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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PRECIPITATION: Maximum daily total, 3.59 in., August 22, 2002. |
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EXTREMES FOR CURRENT YEAR.--Maximum daily total, 2.09 in., April 30. |
PRECIPITATION, TOTAL, IN INCHES, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003 DAILY SUM VALUES |
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| DAY | OCT | NOV | DEC | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP |
| 1 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.38 | 0.00 | 0.00 | 1.77 | 0.42 |
| 2 | 0.34 | 0.00 | 0.00 | 0.00 | 0.03 | 0.00 | 0.00 | 0.00 | 0.02 | 0.00 | 0.02 | 0.00 |
| 3 | 0.00 | 0.00 | 0.00 | 0.00 | 0.02 | 0.00 | 0.43 | 0.00 | 0.12 | 0.00 | 0.42 | 0.00 |
| 4 | 0.40 | 0.00 | 0.00 | 0.00 | 0.00 | 0.03 | 0.91 | 1.09 | 0.00 | 0.06 | 0.00 | 0.01 |
| 5 | 0.00 | 0.11 | 0.00 | s0.03 | 0.00 | 0.00 | 0.00 | 0.01 | 0.00 | 0.65 | 0.00 | 0.00 |
| 6 | 0.00 | 0.00 | 0.00 | s0.01 | 0.00 | s0.07 | 0.00 | 0.00 | 0.07 | 0.36 | 0.09 | 0.00 |
| 7 | 0.06 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.10 | 0.00 | 0.00 |
| 8 | 0.03 | 0.00 | 0.00 | 0.00 | 0.00 | 0.03 | 0.00 | 0.26 | 0.42 | e0.27 | 0.09 | 0.00 |
| 9 | 0.03 | 0.04 | 0.00 | 0.00 | 0.00 | 0.00 | 0.02 | 0.82 | 0.00 | e0.23 | 0.00 | 0.00 |
| 10 | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.29 | 0.00 | e0.05 | 0.00 | 0.00 |
| 11 | 0.04 | 0.03 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.14 | 0.00 | 0.00 | 0.09 | 0.00 |
| 12 | 0.07 | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.02 |
| 13 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | s0.03 | 0.00 | 0.00 | 0.00 | e0.07 | 0.00 | 0.01 |
| 14 | 0.00 | 0.11 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.24 | 0.00 | 0.00 | 0.03 | 0.69 |
| 15 | 0.00 | 0.02 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | e1.26 | 0.02 | 0.00 |
| 16 | 0.00 | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.05 |
| 17 | 0.09 | 0.03 | 0.08 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.74 | 0.00 | 0.05 |
| 18 | 0.01 | 0.10 | 1.12 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.52 | 0.00 | 0.00 | 0.00 |
| 19 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.14 | 0.06 | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 |
| 20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.09 | 0.06 | 0.06 | 0.00 | 0.35 | 0.00 | 0.01 |
| 21 | 0.00 | 0.13 | s0.01 | 0.00 | 0.00 | 0.02 | 0.01 | 0.00 | 0.00 | 0.20 | 0.00 | 0.05 |
| 22 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | 0.27 |
| 23 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| 24 | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | 0.03 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.02 |
| 25 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.09 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.04 |
| 26 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.00 | 0.00 | 0.05 | 0.00 | 0.22 | 0.48 |
| 27 | 0.00 | 0.00 | s0.01 | 0.00 | 0.00 | 0.02 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.04 |
| 28 | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | 0.41 | 0.00 | 0.47 | 0.06 | 0.19 | 0.00 | 0.01 |
| 29 | 0.00 | 0.01 | 0.00 | 0.00 | -- | 0.00 | 0.05 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 |
| 30 | 0.00 | 0.00 | 0.00 | 0.00 | -- | 0.00 | 2.09 | 0.27 | 0.00 | 0.00 | 0.00 | 0.07 |
| 31 | 0.00 | -- | 0.00 | 0.19 | -- | 0.04 | -- | 0.02 | -- | 0.01 | 0.16 | -- |
| TOTAL | 1.30 | 0.60 | 1.22 | 0.23 | 0.05 | 1.01 | 3.64 | 4.06 | 1.26 | 4.54 | 2.91 | 2.25 |
| s Snowfall-affected precipitation | |
| e Estimated |
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |