Illinois Drought: Update October 5, 2005, Illinois State Water Survey

Illinois Drought

So far, October has not seen the relief needed from the current drought situation. As of October 26, state-wide rainfall is 1.30 inches compared to normal October rainfall of 2.87 inches. This is 1.57 inches below normal (45 percent of normal). As a result, the statewide precipitation departure has increased to 8.2 inches below normal since March 1, 2005. Daily updates of the conditions since March 1 can be found at: http://www.sws.uiuc.edu/atmos/statecli/Dry2005/Dry2005.htm


Figure 4. Ten driest March through September periods
in Illinois (since 1895)

Rank Year Precip (in)

1 1988 15.41
2 1930 16.13
3 1901 16.77
4 1914 18.11
5 1936 18.49
6 2005 18.56
7 1940 19.05
8 1971 19.49
9 1895 20.06
10 1953 20.49



Figure 5. Rankings of driest March through September periods withi
n
Illinois climate divisions (since 1895)

Climate divisions 2005 rank top 4 driest years

Northwest 2 1988, 2005, 1971, 1930
Northeast 1 2005, 1934, 1988, 1946
West 2 (tie) 1988, 1901, 2005, 1971
Central 3 1988, 1901, 2005, 1914
East 18 1988, 1895, 1930, 1932
West-Southwest 6 1914, 1988, 1930, 1901
East-Southeast 13 1930, 1914, 1988, 1901
Southwest 33 1930, 1936, 1901, 1914
Southeast 33 1930, 1936, 1901, 1940
Source: Illinois State Water Survey
Illinois Drought

Illinois State Water Survey

2204 Griffith Dr
Champaign, IL 61820-7463
217-244-5459
info@isws.illinois.edu

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