National Weather Service United States Department of Commerce

Area Covered

This spring flood and water resource outlook is for the Rapid City Hydrologic Service Area (HSA) which covers northeastern Wyoming and western South Dakota. The main river basins include the Little Missouri, Eastern Powder, Belle Fourche, Grand, Moreau, Cheyenne, Bad, White and Keyapaha River Basins.

Current Flooding
To obtain the latest watches, warnings, statements, and advisories, go to:

Click here for preliminary monthly precipitation amounts for northeastern Wyoming and western South Dakota.

Central Plains

Percent of Normal Precipitation since October 1


Departure from Normal Precipitation

South Dakota

Departure from Normal Precipitation

Image of Percent of Normal Precipitation for the Water Year

Current Climate Summary Map

Current Climate Summary Map

Precipitation Maps from the High Plains Climate Center


Snow Cover and Liquid Water Content

Modeled Snow Analyses from National Operational Hydrologic Remote Sensing Center

Cole Canyon
North Rapid Creek
Blind Park

NRCS Snotel Graphic for Cole Canyon

NRCS Snotel Graphic for North Rapid Creek

NRCS Snotel Graphic for Blind Park

Black Hills and Bear Lodge Mountain Snotel Data from the Natural Resources Conservation Service


Soil Conditions

Calculated Soil Moisture Anomaly

Modeled Snow Moisture from Climate Prediction Center


Lake and River Conditions

Monthly Average Streamflow

Streamflow Mapping provided by the USGS


Current Reservoir Data from the Bureau of Reclamation
The graphs below denote reservoir storage levels. The line labeled active is the point where the reservoir is considered "full" which is when the pool elevation is at the top of the active conservation pool. Most reservoirs have additional storage above this level for surplus or to hold flood waters.
Angostura Reservoir, SD
Belle Fourche Reservoir, SD
Deerfield Reservoir, SD

Current Reservoir Data for Angostura Reservoir

Current Reservoir Data for Belle Fourche Reservoir

Current Reservoir Data for Deerfield Reservoir

Keyhole Reservoir, WY
Pactola Reservoir, SD
Shadehill Reservoir, SD

Current Reservoir Data for Keyhole Reservoir

Current Reservoir Data for Pactola Reservoir

Current Reservoir Data for Shadehill Reservoir


Temperature and Precipitation Outlooks

Climate Prediction Center Temperature and Precipitation Outlooks

8 - 14 Day Temperature Outlook
8 - 14 day Precipitation Outlook


1 Month Temperature Outlook
1 Month Precipitation Outlook

Monthly Temperature Outlook

Monthly Precipitation Outlook


Three Month Temperature Outlook
Three Month Precipitation Outlook

Three Monthly Temperature Outlook

Three Monthly Precipitation Outlook


Questions or Comments

If you have any questions or comments about this spring flood and water resource outlook please contact:

Melissa Smith
Service Hydrologist
National Weather Service
300 East Signal Drive
Rapid City, SD  57701