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Indiana Department of Natural Resources

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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

July, 2016

Precipitation

July 2016 Indiana precipitation was below normal to above normal across the state, with temperature on the whole above normal. The statewide monthly precipitation average was about 119 percent of normal. The overall monthly temperature average for Indiana was 75.0 degrees Fahrenheit or about 0.7 degree above normal.

Six of Indiana's nine climate divisions received above normal precipitation for the month of July. The south-central climate division received the highest (190.2) percentage of normal precipitation for the month, while the northeastern division received the lowest (60.8) percentage.

For the year to date, three of the nine climate divisions have received above normal precipitation, ranging from 87.4 percent for the north-central climate division to 116.0 percent for the south-central division. For the 2016 water year, which began October 1, 2015, total precipitation is above normal for six of the nine climate divisions (89.6 to 121.1%). Starting from January 2015, eight of the state's nine climate divisions have received above normal precipitation. Those ranges are from 99.6 percent for the north-central division to 119.0 percent for the south-central division.

For the Standardized Precipitation Index (SPI) long-term 12-month index, eight of Indiana's nine climate divisions are in the "near normal" category. The south-central climate division is in the "moderately wet" range. The 6-month index shows seven of the state's nine climate divisions in the "near normal" category. The southwestern and south-central climate divisions are in the "moderately wet" range. The 3-month index shows the entire state in the "near normal" category. For the 1-month index, five of the nine climate divisions lie in the "near normal" range.  The northwestern and west-central climate divisions are in the "moderately wet" category, the southwestern division is in the "very wet" range, and the south-central division lies in the "extremely wet" category.

U. S. Drought Monitor

The period ending July 26, 2016 showed abnormally dry conditions for about 14 percent of Indiana.  No drought conditions were reported for approximately 86 percent of the state.

Streamflow

Mean monthly flows for 7 of the 12 monitored streams were below their historical mean monthly flow for the month of July. The St. Marys River at Decatur had the lowest mean monthly flow with 10 percent of the historical mean flow for the month. Sugar Creek at Crawfordsville had the highest mean monthly flow with 154 percent of the historical mean flow for the month.

Detailed Information on Streamflow

Lake Michigan

The lake Michigan-Huron water level for July was the same as last month's water level, and four inches above the July 2015 water level. Comparison of July monthly mean water levels to long-term (1918-present) averages shows that Michigan-Huron water levels were about eleven inches above average. On July 27, 2016, the Michigan-Huron water level was 580.19 feet. The water level was about 42 inches above the previously lowest recorded monthly mean level for July, set in 1964.

The U.S. Army Corps of Engineers predicts the lake Michigan-Huron water level to fall one inch over the next month.

Reservoirs

The water levels in each of the eight Indiana reservoirs being monitored by the U.S. Army Corps of Engineers was near or above its normal pool elevation on July 29, 2016. The normal pool deviation ranged from -0.3 feet (Cagles Mill) to 3.8 feet (Patoka).

Each of the three reservoirs monitored by Citizens Water-Morse, Geist, and Eagle Creek- was above its normal pool elevation as of July 28, 2016. The reservoirs' deviation from their normal pools ranged from 0.04 feet (Morse) to 1.4 feet (Eagle Creek).

Ground Water Levels

As of July 31, 2016, 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 Vigo 7 and Harrison 8; near normal for Posey 3 and Clark 20; and below normal for LaPorte 9, Fulton 7, LaGrange 2, Morgan 4, and Randolph 3. Groundwater levels are expected to decrease through August 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

Temperature data:
Indiana State Climate Office, Purdue University