IN.gov - Skip Navigation

Note: This message is displayed if (1) your browser is not standards-compliant or (2) you have you disabled CSS. Read our Policies for more information.

Amber Alert
Amber Alert - TEST

Indiana Department of Natural Resources

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

July, 2015

Precipitation
July 2015 Indiana precipitation was generally above to well above normal across most of the state. Temperature on the whole was slightly below normal. The statewide monthly precipitation average was about 143 percent of normal. The overall monthly temperature average for Indiana was 73.3 degrees Fahrenheit, or 1.0 degree below normal.

Each of Indiana’s nine climate divisions received above normal precipitation for the month of July. The southeastern climate division received the highest (215.0) percentage of normal precipitation for the month, while the southwestern division received the lowest (107.5) percentage.

For the year to date, each of the nine climate divisions have received above normal precipitation, ranging from 118.1 percent for the west-central climate division to 143.4 percent for the northeastern division. For the 2015 water year, which began October 1, 2014, total precipitation is above normal for each of the nine climate divisions (107.3 to 121.8%). Starting from January 2014, each of the state’s climate divisions has received above normal precipitation. Those ranges are from 101.1 percent for the west-central division to 115.6 percent for the northwestern division.

For the Standardized Precipitation Index (SPI) long-term 12-month index, six of Indiana’s nine climate divisions are in the “moderately wet” category. The northwestern and southwestern divisions are in the “very wet” range, and the northeastern division is in the “extremely wet” category. The 6-month index shows the northwestern, north-central, and west-central climate divisions in the “moderately wet” range, with the northeastern division in the “extremely wet” category. The rest of the divisions are in the “very wet” range. For the 3-month index, the northern climate divisions lie in the “extremely wet” category. The central and southern divisions are split amongst the “very wet” and “moderately wet” indices. The 1-month index shows the southeastern climate division in the “extremely wet” range, the northeastern and central divisions in the “very wet” category, and the north-central, east-central, and south-central divisions in the “moderately wet” range. The western one-third of the state lies in the “near normal” category.

U. S. Drought Monitor
The period ending July 28, 2015 showed no drought conditions for Indiana.

Streamflow
Mean monthly flows for each of the 12 monitored streams were well above their historical mean monthly flow for the month of July. Fall Creek near Fortville had the lowest mean monthly flow with 234 percent of the historical mean flow for the month. The Muscatatuck River near Deputy had the highest mean monthly flow with 1,227 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 10 inches above the July 2014 water level. Comparison of July monthly mean water levels to long-term (1918-present) averages shows that Michigan-Huron water levels were about six inches above average. On July 30, 2015, the Michigan-Huron water level was 579.83 feet. The water level was about 37 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 decrease one inch over the next month.

Reservoirs
The water level in each of the eight Indiana reservoirs being monitored by the U.S. Army Corps of Engineers was above or well above its normal pool elevation on August 3, 2015. The normal pool deviation ranged from 0.1 feet (Brookville) to 30.1 feet (Mississinewa).

Each of the three reservoirs monitored by Citizens Water-Morse, Geist, and Eagle Creek- was above its normal pool elevation as of August 3, 2015. The reservoirs’ deviation from their normal pools ranged from 0.13 feet (Geist) to 1.77 feet (Eagle Creek).

Ground Water Levels
As of July 31, 2015, recent water level data are available for each of the nine wells being monitored. The water level for the observation wells is below normal for LaGrange 2; and above or much above normal for LaPorte 9, Fulton 7, Vigo 7, Morgan 4, Randolph 3, Posey 3, Harrison 8, and Clark 20. 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 

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