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Indiana Department of Natural Resources

Water > Water Availability / Use / Rights > Water Resource Updates (updated monthly) > Monthly Water Resource Summary Monthly Water Resource Summary

September, 2014

Precipitation
September 2014 Indiana precipitation was generally above normal across most of the state, with temperature on the whole slightly below normal. The statewide monthly precipitation average was about 109 percent of normal. The overall monthly temperature average for Indiana was 64.3 degrees Fahrenheit or 0.9 degrees below normal.

Seven of Indiana’s nine climate divisions received above normal precipitation for the month of September. The northeastern climate division received the highest (144.4) percentage of normal precipitation for the month, while the southeastern division received the lowest (75.2) percentage.

For the year to date, each of the nine climate divisions have received above normal precipitation, ranging from 104.2 percent for the southeastern climate division to 128.9 percent for the northwestern division. For the 2014 water year starting October 1, 2013, total precipitation is above normal for each of Indiana’s nine climate divisions (104.5 to 120.5%). Starting from January 2013, each of the state’s climate divisions has received above normal precipitation. Those ranges are from 106.0 percent for the southeastern division to 117.3 percent for the northwestern division.

For the Standardized Precipitation Index (SPI) long-term 12-month index, five of Indiana’s nine climate divisions are in the “near normal” category. The northwestern division is in the “very wet” range, and the east-central, south-central, and southwestern divisions are in the “moderately wet” category. The 6-month index shows the same classification as the 12-month index. For the 3-month index, the northwestern climate division is in the “moderately wet” range. The remaining divisions are in the “near normal” category. The 1-month index shows the northeastern climate division in the “moderately wet” range. The rest of the state lies within the “near normal” category.

U. S. Drought Monitor
The period ending September 30, 2014 showed abnormally dry conditions for portions of north-central and northeastern Indiana. About 97 percent of Indiana showed no drought conditions.

Streamflow
Mean monthly flows for two of the 12 monitored streams were below or well below their historical mean monthly flow for the month of September. Sugar Creek at Crawfordsville had the lowest mean monthly flow with 25 percent of the historical mean flow for the month. The Kankakee River at Shelby had the highest mean monthly flow with 274 percent of the historical mean flow for the month.

Detailed Information on Streamflow

Lake Michigan
The lake Michigan-Huron water level for September was one inch above last month’s water level, and 20 inches above the September 2013 water level. Comparison of September monthly mean water levels to long-term (1918-present) averages shows that Michigan-Huron water levels were the same as the average. On September 30, 2014, the Michigan-Huron water level was 579.11 feet. The water level was about 30 inches above the previously lowest recorded monthly mean level for September, set in 1964.

The U.S. Army Corps of Engineers predicts the lake Michigan-Huron water level to decrease two inches over the next month.

Reservoirs
The water levels in six of the eight Indiana reservoirs being monitored by the U.S. Army Corps of Engineers were below their normal pool elevation on October 1. The normal pool deviation ranged from -4.8 feet (Salamonie) to 0.3 feet (Patoka).

One of the three reservoirs monitored by Citizens Water-Morse, Geist, and Eagle Creek- was below its normal pool elevation as of October 1, 2014. The reservoirs’ deviation from their normal pools ranged from -1.54 feet (Eagle Creek) to 0.07 feet (Geist).

Ground Water Levels
As of September 30, 2014, recent water level data are available for each of the nine wells being monitored. The water level for the observation wells is above normal for LaPorte 9, Fulton 7, Vigo 7, Randolph 3, and Harrison 8; near normal for Morgan 4, Clark 20, and Posey 3; and below normal for LaGrange 2. Groundwater levels are expected to increase through October for much of the state.

Real-time data are available for all nine observation wells. The real-time information may be accessed on the following U.S. Geological Survey website: http://waterdata.usgs.gov/in/nwis/current/?type=gw

Acknowledgments
This report has been compiled from Division of Water data and from information supplied by the following:

Precipitation data:
National Oceanic and Atmospheric Administration, National Weather Service, Midwestern Regional Climate Center

Standard Precipitation Index (SPI):
National Drought Mitigation Center (NDMC) and Western Regional Climate Center (WRCC)

Streamflow:
U.S. Geological Survey and State of Indiana cooperative program

Lake Michigan level data:
U.S. Army Corps of Engineers, Detroit District 

Reservoir data:
U.S. Army Corps of Engineers, Louisville District

Ground water level data:
U.S. Geological Survey and State of Indiana cooperative program 

Palmer Drought Severity Index:
U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Weather Service

Temperature data:
Indiana State Climate Office, Purdue University