Monthly Water Resource Summary

June, 2018

Precipitation

For June 2018, Indiana’s precipitation was generally above normal, with average temperature above normal. The statewide monthly precipitation average was 153.9 percent of normal. The overall monthly temperature average for Indiana was 73.9 degrees Fahrenheit or 3.4 degrees above normal.

All nine climate divisions received above to well above normal precipitation for the month of June. The south-central climate division received the highest (202.9) percentage of normal precipitation for the month; the north-central climate division received the lowest (120.8) percentage of normal precipitation for the month.

For the year to date, all nine climate divisions have received above normal to well above normal precipitation, ranging from 109.2 percent of normal for the east-central climate division to 134.4 percent of normal for the southwest climate division. For the 2018 water year, which began October 1, 2017, total precipitation is above normal for all the nine climate divisions (108.0% to 121.1% percent of normal). Beginning January 2017, all nine climate divisions have received above normal precipitation. These range from 106.7 percent in the southwestern division to 120.9 percent for the northeastern division.

The Standardized Precipitation Index (SPI) long-term 12-month indices shows the northwestern, north-central, southwestern, south-central, and southeastern climate divisions in the “moderately wet” category with the remaining climate divisions in the “near normal” category. The SPI 6-month indices shows the northwestern, north-central, northeastern, and south-central in the “moderately wet” category, the southwestern climate division in the “very wet” category, and the remaining climate divisions in the “near normal” category. The SPI 3-month indices shows all climate divisions in the “near normal” category.  The SPI for the 1-month indices shows the southwestern and south-central climate divisions in the “very wet” category, the northeastern, west-central, central and southeastern climate divisions in the “moderately wet” category, and the remaining climate divisions in the “near normal” category. 

U. S. Drought Monitor

For June 26, 2018, the U.S. Drought Monitor shows two small areas of “abnormally dry” conditions located in the central and northwest parts of the state. The U.S. Seasonal Drought Outlook predicts no drought conditions for the state through the end of September 2018.

Streamflow

Of the twelve streams included in drought reporting since 1999, eight had stream flow near to above normal.  The St. Marys at Decatur had the highest mean monthly flow at 158% and the Fall Creek near Fortville had the lowest mean monthly flow at 54%.

Detailed Information on Streamflow

Lake Michigan

The Lake Michigan-Huron water level for June 29, 2018 was two inches above the measurement taken on June 29, 2017, and two inches above the measurement reported on May 29, 2018.  On June 30, 2018 the Michigan-Huron level was 580.73 feet, which is approximately 49 inches above the lowest recorded monthly mean level for June set in 1964. Comparison of June monthly mean water levels to the long-term (1918-present) average shows Lakes Michigan-Huron water levels were approximately 17 inches above the average. All Lake Michigan-Huron data are referenced to the International Great Lakes Datum 1985.

The U.S. Army Corps of Engineers predicts the Lake Michigan-Huron water level to remain the same over the next month.

Reservoirs

On July 2, 2018, the water levels for all eight Indiana reservoirs monitored by the U.S. Army Corps of Engineers were above normal pool elevation. The deviation from normal pools ranged from 0.1 feet above (Brookville) to 7.4 feet above (Patoka). 

The water levels of all three reservoirs monitored by Citizens Energy Group (Morse, Geist and Eagle) were above their respective normal pool elevations as of July 2, 2018.  The deviation from normal pools ranged from 0.10 feet (Geist) to 1.62 feet (Eagle Creek).

Groundwater Levels

As of July 1, 2018 new water level data was available for all nine wells currently monitored.  Of the nine wells monitored, data indicate the groundwater levels for LaGrange 2, Vigo 7, Randolph 3, and Harrison 8 are above normal for their respective mean monthly level.  The mean monthly groundwater level is below normal for LaPorte 9, Fulton 7, and Morgan 4 and near normal for Posey 3 and Clark 20.   

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

Standardized 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

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

Temperature data:
Midwestern Regional Climate Center and Indiana State Climate Office, Purdue University