Updated on Monday, June 11, 2007
Updated as needed
Drought conditions as of June 11. The southern Black Hills and Fall River County continued to experience severe (D2) drought conditions. Elsewhere, northwestern South Dakota improved to abnormally dry (D0), while no drought conditions were depicted over northeastern Wyoming or in the northern Black Hills.
During the month of May temperatures were 2 to 4 degrees above normal and precipitation was generally above normal. The only locations with below normal precipitation were in the southern and central Black Hills and southwestern South Dakota. Elsewhere, precipitation was above normal with the heaviest precipitation falling across northeastern Wyoming, northwestern South Dakota and the northern Black Hills where 5 to 9 inches of rain fell during the month of May. Precipitation amounts ranged from 1.35 inches in Ardmore to 9.41 inches in Deadwood.
Neutral ENSO (El Nino – Southern Oscillation) conditions continued into June. At this time weak La Nina conditions could develop by the end of July. However, there is a great deal of uncertainty on how strong the La Nina will be if it develops. The strength of La Nina impacts the expected climate response. The Climate Prediction Center outlook through August calls for above average temperatures and near average precipitation.
According to the United States Geological Survey (USGS), the monthly-average streamflow for May was normal over most basins except for the Cheyenne River Basin where conditions were below normal. At the beginning of June, daily streamflow conditions were in the 25th to 89th percentile.
Reservoirs around the region remain below average for this time of year. The table below shows reservoir percent of average capacity and change in elevation over the past 30 days as calculated by the United States Bureau of Reclamation (USBR).
|Reservoir||Percent of Normal||Elevation Change|
|Belle Fourche||70%||+2.6 ft|
If you have any questions or comments about this drought information please contact,
Melissa Smith or Lee Czepyha
Drought Focal Points
National Weather Service
300 East Signal Drive
Rapid City South Dakota 57701
E-mail firstname.lastname@example.org or email@example.com
The drought monitor is a multi-agency effort involving NOAA's National Weather Service (NWS) and National Climatic Data Center, the United States Department of Agriculture (USDA), state and regional center climatologists, and the National Drought Mitigation Center. Information for this statement has been gathered from NWS and Federal Aviation Administration observation sites, state cooperative extension services, USDA, USBR, and USGS.