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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

October, 2017

Precipitation

October 2016 Indiana precipitation was generally below to near normal, with temperature on the whole above normal. The statewide monthly precipitation average was about 86 percent of normal. The overall monthly temperature average for Indiana was 59.6 degrees Fahrenheit or about 6.0 degrees above normal.

Three of Indiana's nine climate divisions received above normal precipitation for the month of October. The northeast climate division received the highest (107.4) percentage of normal precipitation for the month, while the southwest division received the lowest (46.5) percentage.

For the year to date, eight of the nine climate divisions have received above normal precipitation, ranging from 98.9 percent for the north-central climate division to 116.8 percent for the northwestern division. For the 2017 water year, which began October 1, 2016, total precipitation is at or above normal for three of the nine climate divisions (46.5 to 107.4%). Starting from January 2015, each of the state's nine climate divisions has received above normal precipitation. Those ranges are from 103.1 percent for the north-central division to 117.1 percent for the south-central division.

For the Standardized Precipitation Index (SPI) long-term 12-month index, five of Indiana's nine climate divisions are in the "moderately wet" range, and one is in the "very wet" range. The three remaining divisions are in the "near normal" category. The 6-month index shows one of the state's nine climate divisions in the "very wet" range, and two divisions lie in the "moderately wet" category. The remaining six divisions lie in the "near normal" range. The 3-month index shows three of the state's nine climate divisions in the "near normal" range, five divisions in the "moderately wet" range, and the northwestern division is in the "very wet" range. For the 1-month index, the entire state is in the "near normal" range.

U. S. Drought Monitor

The period ending October 25, 2016 shows a band of "abnormally dry" conditions trending east-west in southern Indiana. No drought conditions were reported for approximately 86 percent of the state.

Streamflow

Mean monthly flows for eleven of the twelve monitored streams were well above their historical mean monthly flow for the month of October, and one was near normal. The Eel River at North Manchester had the lowest mean monthly flow with 98 percent of the historical mean flow for the month. The White River near Centerton had the highest mean monthly flow with 235 percent of the historical mean flow for the month.

Detailed Information on Streamflow

Lake Michigan

The Lake Michigan-Huron water level for October was three inches below last month's water level, and six inches above the October 2015 water level. Comparison of October monthly mean water levels to long-term (1918-present) averages shows that Michigan-Huron water levels were about nine inches above average. On October 31, 2016, the Michigan-Huron water level was 579.56 feet. The water level was about 37 inches above the previously lowest recorded monthly mean level for October, set in 1964.

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

Reservoirs

The water levels in four of the eight Indiana reservoirs being monitored by the U.S. Army Corps of Engineers was above its normal pool elevation on October 31, 2016. The normal pool deviation ranged from -3.3 feet (Salamonie) to 6.0 feet (Mississinewa).

Two of the three reservoirs monitored by Citizens Water; Morse and Geist were above its normal pool elevation as of October 31, 2016. The reservoirs' deviation from their normal pools ranged from -1.09 feet (Eagle Creek) to 0.19 feet (Morse).

Ground Water Levels

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