PROJECT ALERT NOTICE (SD) Dakota WSC Flooding

Date: Thu, 23 May 2019 16:33:11 EDT

Summary: USGS response to flooding in central and western South Dakota continues.

"A large storm brought heavy rain and historic late season snowfall to the Black Hills region May 20-22, 2019", Rapid City NWS. At lower elevations, the same storm delivered 3-5 inches of rain over a broad area from central to western SD. Additional precipitation is forecasted over the next seven days. The following situation report summarizes conditions:

https://www.weather.gov/media/unr/sitreport/SitReport1.pdf

At or above Peak of Record (POR) conditions are occurring at:
USGS 06441000 BAD R NEAR MIDLAND, SD (37 years of record) https://waterwatch.usgs.gov/?id=wwsa&site_no=06441000
USGS 06446500 WHITE R NEAR INTERIOR, SD (15 years of record) https://waterwatch.usgs.gov/?id=wwsa&site_no=06446500
USGS 06438500 CHEYENNE R NEAR PLAINVIEW, SD (49 years of record). https://waterwatch.usgs.gov/?id=wwsa&site_no=06438500

The rating is being extended at:
USGS 06440200 SOUTH FORK BAD R NEAR COTTONWOOD, SD

Gage-heights at twenty-nine (29) U.S. Geological Survey streamgages operated by the Dakota WSC in South Dakota (SD) are exceeding National Weather Service (NWS) minor to major flood stages. The distribution of the twenty-nine sites experiencing flooding can be observed at the WaterWatch link below. All data section staff in the Rapid City and Pierre Offices were deployed in the field today.

Crews are actively documenting high water marks, making discharge measurements, and repairing damaged gages. All streamgages are now operational. No rapid deployment gages are deployed or planned. Stakeholders are being informed of our activities through updates to NWISWeb, NWSChat, email, and phone calls.

The Dakota WSC Facebook page has also been updated with recent flood information: https://www.facebook.com/USGSDakotas/

Map of flood and high flow condition (South Dakota)