Moderate Drought Develops
Updated on Thursday, June 14, 2007
Next Scheduled Update on Thursday, June 21, 2007
Since April 15 of this year, rainfall totals across much of Central Indiana have remained well below normal for the time period. Many areas have experienced less than half the rain that normally would be expected from April 15 through now. Area totals during this time period ranged from 3 to 6 inches. Normally around 8 inches of rain can be expected during this time.
Because of the lack of rainfall since mid April, the June 12th release of the U.S. Drought Monitor indicated Abnormally Dry (D0) conditions across all of Central and Southern Indiana. Portions of Central Indiana, from the Indianapolis metro area and southeastward to Ohio were elevated into the Moderate Drought (D1) category. Only extreme northern Indiana was not classified as abnormally dry.
Due to a significant surplus of rainfall that existed from late 2006 into the first few months of 2007, drought conditions have not yet significantly impacted deep groundwater levels, however the impacts were becoming more pronounced in surface moisture and stream flows.
Local Area Impacted:
Abnormally Dry (D0) conditions were present in all counties in Central Indiana. Moderate Drought (D1) conditions were present from the Indianapolis metro area and extended southeastward to Ohio.
State and Local Actions:
Local water companies continue to advise residents to use water wisely. Authorities in several communities across Central Indiana have enacted voluntary water restrictions.
Since April 15, 2007, precipitation deficits ranged between three and six inches across central Indiana.
The sixty days between April 15 and June 13 have been the seventh driest during this time period on record for Indianapolis, and this year has brought the driest weather during this time period since 1988.
The image below is courtesy of the Indiana State Climate Office at http://iclimate.org
and it provides a graphical representation of mean rainfall deficits since May 12007.
Soil Moisture Conditions
As of June 16, the Midwestern Regional Climate Center (MRCC) indicated soil moisture deficits of at least 0.6 inches across Central Indiana. The greatest deficits were found in areas south of Indianapolis. The image below is courtesy of the MRCC at http://mcc.sws.uiuc.edu/cliwatch/watch.htm
Groundwater levels have not yet been significantly impacted during the current period of abnormal dryness. Detailed information courtesy of the U.S. Geological Survey is at http://watermonitor.gov/?a=groundwater
River and Stream Flow Conditions:
With well below normal amounts of precipitation since May 1, levels on area rivers and streams have fallen. The map below indicates the comparison of current flow levels to normal conditions for this time of year.
The six to ten day outlook, covering the period of June 20th through 24th, indicates temperatures near normal across Central Indiana. The Precipitation Outlook indicates near normal precipitation across Central and Southern Indiana. During this time period, normal precipitation is about seven tenths of an inch.
Further out in time the eight to fourteen day outlook, covering the period of June 22nd to 28tth indicates near normal precipitation and near normal temperatures. Normal precipitation for this period is about one inch.
Thirty and ninety day outlooks call for equal chances of below, above, or near normal values of temperatures and precipitation.
Questions or Comments:
Climate Services Focal Point
National Weather Service, Indianapolis
Telephone: (317) 856-0360
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