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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, 3.59 in., August 22. |
PRECIPITATION, TOTAL, IN INCHES, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002 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 | 0.14 | 0.00 | 0.21 | 0.23 | 0.00 | 0.00 | 0.00 | 0.00 |
| 2 | .00 | .00 | .00 | .00 | .00 | .38 | .04 | .07 | .00 | .00 | .00 | .48 |
| 3 | .00 | .00 | .00 | .00 | .03 | .00 | .00 | .00 | .36 | .00 | .00 | .00 |
| 4 | .81 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | 2.55 | .01 | .26 | .00 |
| 5 | .19 | .00 | .06 | .00 | .00 | .02 | .00 | .00 | .00 | .00 | .00 | .00 |
| 6 | .00 | .00 | .00 | .00 | .00 | .39 | .00 | .10 | .00 | .01 | .00 | .00 |
| 7 | .00 | .00 | .00 | .00 | .00 | .00 | .33 | .00 | .00 | .00 | .00 | .00 |
| 8 | .00 | .00 | .00 | .00 | .00 | .20 | .70 | .12 | .00 | .00 | .00 | .00 |
| 9 | .00 | .00 | .00 | .00 | .00 | .58 | .09 | .24 | .00 | 1.87 | .00 | .00 |
| 10 | .20 | .00 | .00 | .00 | .05 | .00 | .00 | .00 | .31 | .00 | .00 | .00 |
| 11 | .01 | .00 | .00 | .00 | .00 | .00 | .00 | 1.71 | .03 | .00 | .00 | .00 |
| 12 | .49 | .00 | .25 | .00 | .00 | .00 | .00 | .46 | .00 | .00 | .00 | .00 |
| 13 | 2.62 | .02 | .09 | .00 | .00 | .00 | .00 | .00 | .06 | .00 | 1.65 | .00 |
| 14 | .08 | .05 | .01 | .01 | .00 | .00 | .00 | .00 | .19 | .00 | .00 | .00 |
| 15 | .01 | .00 | .00 | .00 | .00 | .02 | .00 | .00 | .00 | .00 | .00 | .00 |
| 16 | .01 | .00 | .10 | .01 | .00 | .00 | .00 | .18 | .00 | .00 | .00 | .00 |
| 17 | .00 | .00 | .04 | .00 | .00 | .00 | .07 | .00 | .02 | .00 | .00 | .00 |
| 18 | .00 | .05 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .00 | .22 |
| 19 | .00 | .04 | .09 | s.01 | .30 | .00 | .23 | .00 | .00 | .00 | .17 | .06 |
| 20 | .00 | .00 | .00 | .01 | .22 | .04 | .07 | .00 | .00 | .01 | .00 | .29 |
| 21 | .00 | .00 | .00 | .01 | .00 | .00 | .30 | .00 | .00 | .00 | .00 | .00 |
| 22 | .33 | .00 | .09 | .01 | .00 | .00 | .00 | .00 | .00 | .00 | 3.59 | .16 |
| 23 | .65 | .00 | .00 | .00 | .00 | .00 | .00 | .03 | .00 | .00 | .07 | .00 |
| 24 | 1.19 | .17 | .00 | .00 | .00 | .00 | .29 | .03 | .00 | .00 | .00 | .00 |
| 25 | .00 | .13 | .00 | .00 | .00 | .00 | .00 | .00 | .03 | .00 | .00 | .00 |
| 26 | .00 | .03 | .00 | .00 | .00 | .01 | .00 | .00 | .00 | .00 | .00 | .00 |
| 27 | .00 | .00 | .00 | .00 | .00 | .00 | .50 | .00 | .00 | .20 | .00 | .00 |
| 28 | .00 | .06 | .00 | .00 | .00 | .00 | .02 | .00 | .00 | .00 | .00 | .00 |
| 29 | .00 | .07 | .00 | .00 | -- | .49 | .00 | .00 | .00 | .08 | .00 | .07 |
| 30 | .02 | .23 | .00 | .01 | -- | .00 | .00 | .00 | .00 | .00 | .00 | .00 |
| 31 | .00 | -- | .00 | .18 | -- | .01 | -- | .00 | -- | .00 | .00 | -- |
| TOTAL | 6.61 | 0.85 | 0.73 | 0.25 | 0.74 | 2.14 | 2.85 | 3.17 | 3.55 | 2.18 | 5.74 | 1.28 |
| s Snowfall-affected precipitation |
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |