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South Dakota Drought Watch

Map of below normal 7-day average streamflow compared to historical streamflow for the week of the year (South Dakota)
Map of below normal 7-day average streamflow compared to historical streamflow for the week of the year (South Dakota)
Explanation
color code for 11th-25th percentile Below Normal 11th-25th percentile
color code for 6th-10th percentile Moderate Hydrologic Drought 6th-10th percentile
color code for less than 5th percentile Severe Hydrologic Drought ≤ 5th percentile
color code for lowest 7-day flow Extreme Hydrologic Drought lowest 7-day flow
color code for not ranked Not ranked  
What is percentile?

The Below normal streamflow map depicts 7-day average streamflow conditions as measured at USGS gaging stations. The colors represent 7-day average streamflow compared to percentiles of historical weekly streamflow for the week of the year.
This map represents conditions adjusted for this time of the year. Only stations having at least 30 years of record are used.
Uncolored circles depict stations having less than 30 years of record, having streamflows near or above normal, or that are currently not transmitting.
The data used to produce this map are provisional and have not been reviewed or edited. They may be subject to significant change.

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U.S. Department of the Interior, U.S. Geological Survey
Request: South Dakota information/data
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Last Modified: April 27, 2004
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URL: http://sd.water.usgs.gov/drought