Monthly Water Resource Summary

November, 2017

Precipitation

For November 2017, Indiana's precipitation was generally above normal, with average temperature slightly above normal. The statewide monthly precipitation average was approximately 128.4 percent of normal. The overall monthly temperature average for Indiana was 42.6 degrees Fahrenheit or 0.3 degrees above normal.

Eight of the nine climate divisions received above normal or well above normal precipitation for the month of November. The northeastern climate division received the highest (170.3) percentage of normal precipitation for the month, while the southwestern climate division received the lowest (78.8) percentage.

For the year to date, all nine climate divisions have received near normal or above normal precipitation, ranging from 95.3 percent of normal for the southwestern climate division to 128.6 percent of normal for the northeastern climate division. For the 2018 water year, which began October 1, 2017, total precipitation is above normal for eight of the nine climate divisions (95.5% to 159.0% percent of normal). Beginning January 2016, all of the nine climate divisions have received near normal or above normal precipitation. These range from 99.2 percent for the southwestern division to 116.9 percent for the northwestern division.

The Standardized Precipitation Index (SPI) long-term 12-month indices shows the northeastern climate division in the "extremely wet" category; the northwestern, north-central, central, east-central, and southeastern climate divisions in the "very wet" category with the remaining climate divisions in the "near normal" category. The 6-month SPI indices shows the northwestern, north-central, east-central, and southeastern climate division in the "moderately wet" category; and the remaining climate divisions in the "near normal" category.  The 3-month SPI indices shows the northwestern, north-central, and southeastern in the "moderately wet" category; and all remaining climate divisions in the "near normal" category. The 1-month SPI indices shows the northeastern and east-central climate division in the "very wet" category, the north-central, central, and southeastern climate divisions in the "moderately wet" category with the remaining climate divisions shown in the "near normal" category.

U. S. Drought Monitor

For the period ending November 28, 2017, the U.S. Drought Monitor shows two small areas of "abnormally dry" conditions in the west-central and southwestern portions of the state. No other drought conditions exist in the state.  The U.S. Seasonal Drought Outlook predicts current drought conditions will end by February 28, 2018..

Streamflow

Of the twelve streams included in drought reporting since 1999, each had stream flow well above normal.  The St. Marys River at Decatur had the highest mean monthly flow at 381%, and the White River at St. Petersburg had the lowest mean monthly flow at 175%.

Detailed Information on Streamflow

Lake Michigan

The Lake Michigan-Huron water level for November 24, 2017 was twelve inches above the measurement taken on November 24, 2016, and two inches below the measurement taken on October 24, 2017.  On November 30, 2017 the Michigan-Huron level was 580.14 feet, which is approximately 46 inches above the lowest recorded monthly mean level for November set in 1964. Comparison of November monthly mean water levels to the long-term (1918-present) average shows Lakes Michigan-Huron water levels were approximately 18 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 fall two inches over the next month.

Reservoirs

On November 30, 2017, the water level for five of the eight Indiana reservoirs being monitored by the U.S. Army Corps of Engineers was at or below normal pool elevation. The normal pool deviation ranged from -0.4 feet (Patoka) to 15.3 feet (Mississinewa).

Two of the three reservoirs monitored by Citizens Water were above their respective normal pool elevations as of November 30, 2017. The deviation from normal pools ranged from -1.44 feet (Eagle Creek) to 0.22 feet (Morse).

Groundwater Levels

As of November 30, 2017 new water level data was available for all of the nine wells currently monitored. Of the nine wells monitored, data indicate the groundwater levels for LaGrange 2, Posey 3, and Clark 20 are below their respective mean monthly level. The mean monthly groundwater level is above normal for La Porte 9, Vigo 7, Fulton 7, and Harrison 8 and near normal for Morgan 4 and Randolph 3.

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