National Weather Service Raw Text Product

847 
NOUS43 KABR 151944
PNSABR
MNZ046-SDZ008-021-160745-

Public Information Statement
National Weather Service Aberdeen SD
144 PM CST Fri Nov 15 2024

...SERVICE CHANGE NOTICE...

To: Family of Services/FOS/Subscribers...NOAA Weather Wise 
    Service/NWWS/Subscribers...Emergency Managers Weather 
    Information Network/EMWIN/Subscribers...NOAAPORT 
    Subscribers...Other National Weather Service/NWS/Customers 
    and Partners...NWS Empolyees

From: James Scarlett, NWS Aberdeen Meteorologist-in-Charge
      Andrew Kalin,   NWS Sioux Falls Service Hydrologist

SUBJECT: Change to Flood Stage and Severity Categories on the
         Minnesota River at Big Stone Lake

Manual readings on Big Stone Lake are currently taken by the Upper
Minnesota River Watershed District in the original project datum.
In order to align these values with elevations commonly referenced
for property and insurance purposes, the datum used for Big Stone
Lake readings is being changed to NAVD88. This conversion will
result in readings at the new datum being 1.55 feet lower than
values in the current project datum. This results in the need to
lower flood stage and severity categories by a similar value.
Below are the revised flood stage and category levels. 

Minnesota River at Big Stone Lake
Previous Minor Stage: 971.5 ft      New Minor Stage: 970.0 ft 
Previous Moderate Stage: 973.0 ft   New Moderate Stage: 971.5 ft
Previous Major Stage:  975.0 ft     New Major Stage:  973.5 ft

This change will be effective December 17th, 2024.

If you have any questions or comments, please contact:

Andrew Kalin
National Weather Service Sioux Falls, SD
26 Weather Lane
Sioux Falls, SD 57104
605-330-4247
andrew.kalin@noaa.gov

$$