Illinois Drought: Update July 27, 2005, Illinois State Water Survey

Illinois Drought

A strong cold front pushed through Illinois on Tuesday and Wednesday, bringing widespread rains across the state as well as relief from the hot, humid weather. Precipitation totals were generally 1 to 3 inches across northern and eastern Illinois, while amounts of less than an inch were reported in southern Illinois. Even with the rains, the long-term rainfall deficits remain large in northern and western Illinois. See Figures.

 

Amazingly, state-wide rainfall for the first 27 days of July is near-normal thanks to the plentiful rains in southern and eastern Illinois.

 

Figures (July 27, 2005):

Precipitation (inches) July 20-27, 2005
Precipitation (inches)
July 20-27, 2005
   
Precipitation (inches - departure from normal), July 20-27, 2005
Precipitation (inches - departure from normal), July 20-27, 2005
   
Precipitation (inches - departure from normal), March 1 - July 27, 2005
Precipitation (inches - departure from normal), March 1 - July 27, 2005
   
Precipitation (percent of normal) March 1 - July 27, 2005
Precipitation (percent of normal) March 1 - July 27, 2005
   

 

Map of climate divisions used below: http://www.sws.uiuc.edu/atmos/statecli/images/ilcldi1.gif

 

                                  Illinois

                         7/ 1/2005 to  7/27/2005

 

Climate          <------Temperature----->   <---------Precipitation--------->

Division         Actual   Normal      Dev   Actual   Normal     Dev   Percent

-----------------------------------------------------------------------------

Northwest          74.6     73.9      0.7     2.58     3.30    -0.72       78

Northeast          74.8     73.7      1.0     3.08     3.33    -0.26       92

West               77.4     76.3      1.1     2.38     3.62    -1.24       66

Central            76.8     75.4      1.4     3.23     3.47    -0.24       93

East               75.6     74.8      0.8     5.32     3.57     1.75      149

West-southwest     77.7     76.9      0.7     2.57     3.09    -0.53       83

East-southeast     77.6     76.9      0.7     3.72     3.45     0.27      108

Southwest          78.5     78.2      0.3     5.30     3.18     2.12      167

Southeast          78.4     78.2      0.2     4.77     3.20     1.56      149

 

State              76.7     75.9      0.8     3.56     3.36     0.20      106

 

Dev means Deviation From Normal, Percent means Percent of Normal

 

Illinois Drought

 

Illinois Drought

Illinois State Water Survey

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