Flooding in South Dakota, May 12 to 16, 2022

Name: Flooding in South Dakota, May 12 to 16, 2022
Start: 2022-05-12T11:45
End: 2022-05-16T03:45
Location: South Dakota

May 12 to 16, 2022 · NWS ABR · 3 events in 2 counties and zones

Where it happened

Every event with a place to put it. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: $20,000
Events: 3

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS ABR wrote it up.

Multiple days of light to moderate rain on top of saturated soils resulted in brief minor flooding for multiple rivers in the forecast area. Rainfall amounts for the 5 day period leading up to the flooding totaled just less than 3 inches near these river basins. Flooding developed on May 12th in the afternoon, with Mud Creek near Rauville peaking just at the flood stage of 9.0 feet before falling below flood stage on the morning of May 13th. Oak Creek near Wakpala reached a stage of 10.68 feet briefly before falling back below flood stage later that evening. The Big Sioux River near Castlewood also topped out at the flood stage of 9.0 feet and stayed at that level until the early morning hours of May 16th. No impacts were noted.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Aberdeen, SD wrote its last area forecast discussion before the first event at May 12, 10:41 AM MST, 1 hour 4 minutes earlier.

Area forecast discussion, May 12, 10:41 AM MST, 1 hour 4 minutes before

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Hazardous weather outlook, May 12, 10:23 AM MST, 1 hour 22 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Aberdeen SD
1223 PM CDT Thu May 12 2022

MNZ039-046-SDZ005>008-010-011-017>023-036-037-051-131200-
Traverse-Big Stone-McPherson-Brown-Marshall-Roberts-Edmunds-Day-
Faulk-Spink-Clark-Codington-Grant-Hamlin-Deuel-Hyde-Hand-Buffalo-
1223 PM CDT Thu May 12 2022

This Hazardous Weather Outlook is for west central Minnesota,
central South Dakota, north central South Dakota and northeast
South Dakota.

.DAY ONE...This afternoon and tonight.

This afternoon and evening severe storms are anticipated. Large hail
up to the size of golf balls, damaging winds in excess of 70 miles
per hour, and isolated tornadoes are possible.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed. Weather spotters are
encouraged to submit reports to the National Weather Service in
Aberdeen. The public can submit reports on our web page, Facebook
page, or our Twitter feed.

SDZ003-004-009-015-016-033>035-045-048-131200-
Corson-Campbell-Walworth-Dewey-Potter-Stanley-Sully-Hughes-Jones-
Lyman-
1223 PM CDT Thu May 12 2022 /1123 AM MDT Thu May 12 2022/

This Hazardous Weather Outlook is for central South Dakota and
north central South Dakota.

.DAY ONE...This afternoon and tonight.

Isolated severe storms are possible this afternoon. Hail and wind
are the main threats.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be requested. Weather spotters are encouraged
to submit reports to the National Weather Service in Aberdeen. The
public can submit reports on our web page, Facebook page, or our
Twitter feed.

In the hours before

Local storm report, May 12, 7:41 AM MST, 4 hours 4 minutes before

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Local storm report, May 12, 9:05 AM MST, 2 hours 40 minutes before

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Local storm report, May 12, 9:20 AM MST, 2 hours 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
1120 AM CDT THU MAY 12 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1225 AM     HAIL             6 SW OACOMA             43.75N 99.48W
05/12/2022  E1.00 INCH       LYMAN              SD   PUBLIC

&&

NWS ABR

Local storm report, May 12, 9:25 AM MST, 2 hours 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
1125 AM CDT THU MAY 12 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1235 AM     HAIL             9 SW OACOMA             43.71N 99.53W
05/12/2022  E0.75 INCH       LYMAN              SD   PUBLIC

&&

NWS ABR

Local storm report, May 12, 9:51 AM MST, 1 hour 54 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
1151 AM CDT THU MAY 12 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0100 AM     HAIL             6 N OACOMA              43.88N 99.41W
05/12/2022  E1.75 INCH       LYMAN              SD   PUBLIC

            HAILED GOLFBALLS FOR ABOUT 15 MINUTES. WIND
            GUSTS OF ~50MPH.

&&

NWS ABR

Local storm report, May 12, 11:16 AM MST, 29 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE ABERDEEN SD
116 PM CDT THU MAY 12 2022

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1225 AM     HAIL             6 SW OACOMA             43.75N 99.48W
05/12/2022  E1.00 INCH       LYMAN              SD   PUBLIC

1235 AM     HAIL             9 SW OACOMA             43.71N 99.53W
05/12/2022  E0.75 INCH       LYMAN              SD   PUBLIC

0100 AM     HAIL             6 N OACOMA              43.88N 99.41W
05/12/2022  E1.75 INCH       LYMAN              SD   PUBLIC

            HAILED GOLFBALLS FOR ABOUT 15 MINUTES. WIND
            GUSTS OF ~50MPH.

0113 AM     HAIL             8 ENE RELIANCE          43.92N 99.45W
05/12/2022  E0.88 INCH       LYMAN              SD   PUBLIC

            FACEBOOK MESSAGE.

0350 AM     TSTM WND GST     1 SW TIMBER LAKE        45.42N 101.09W
05/12/2022  M69 MPH          DEWEY              SD   MESONET

0355 AM     HAIL             4 S STONE BRIDGE        44.55N 97.05W
05/12/2022  E1.25 INCH       HAMLIN             SD   TRAINED SPOTTER

            FROM EMAIL.

0402 AM     TSTM WND GST     4 ENE GLENCROSS         45.47N 100.86W
05/12/2022  E70 MPH          CORSON             SD   FIRE DEPT/RESCUE

            CORRECTS PREVIOUS TSTM WND GST REPORT FROM 4
            ENE GLENCROSS. ESTIMATED 70 MPH WIND GUSTS.
            LARGE, OLD COTTONWOOD TREE DOWN.

0410 AM     HAIL             ESTELLINE               44.58N 96.90W
05/12/2022  M1.00 INCH       HAMLIN             SD   TRAINED SPOTTER

0423 AM     TSTM WND GST     4 ENE POINSETT COLONY   44.66N 96.82W
05/12/2022  M49 MPH          DEUEL              SD   MESONET

            MESONET STATION 47 BRANDT (SDDOT).

0436 AM     HAIL             1 W MOBRIDGE MUNICIPAL  45.55N 100.42W
05/12/2022  E0.50 INCH       WALWORTH           SD   PUBLIC

0438 AM     TSTM WND GST     TUNERVILLE              44.89N 96.68W
05/12/2022  M46 MPH          DEUEL              SD   MESONET

            MESONET STATION 291 4N ALTAMONT (SDDOT).

0439 AM     HAIL             2 ENE LANTRY            45.03N 101.38W
05/12/2022  E1.00 INCH       DEWEY              SD   PUBLIC

0443 AM     TSTM WND GST     5 WNW POLLOCK           45.93N 100.39W
05/12/2022  M59 MPH          CAMPBELL           SD   PUBLIC

            PWS FROM MESONET.

0456 AM     HAIL             DEMPSTER                44.63N 96.95W
05/12/2022  E1.00 INCH       HAMLIN             SD   PUBLIC

            FACEBOOK REPORT.

0517 AM     TSTM WND GST     5 SW JAVA               45.45N 99.96W
05/12/2022  M56 MPH          WALWORTH           SD   MESONET

            MESONET STATION 313 SD RWIS SELBY 4 MILES
            EAST OF US 12/83.

0535 AM     TSTM WND GST     1 SW BOWDLE             45.44N 99.67W
05/12/2022  M64 MPH          EDMUNDS            SD   MESONET

            SDSU MESONET.

&&

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

3 flood. Local standard time, as filed.

Flood, Corson

When: May 12, 11:45 AM MST to 5:45 PM MST
Where: Corson County, 1.45 mi W of Wakpala to 4 mi SE of Wakpala
Cause: Heavy Rain
Reported by: River/Stream Gage
Coordinates: 45.670, -100.560

Flood, Codington

When: May 12, 1:58 PM CST to May 13, 9:47 AM CST
Where: Codington County, 3.59 mi NNE of Rauville to 0.49 mi NNW of Rauville
Cause: Heavy Rain
Reported by: River/Stream Gage
Coordinates: 45.030, -97.060

Flood, Codington

When: May 12, 5:00 PM CST to May 16, 3:45 AM CST
Where: Codington County, 13.7 mi SSE of Appleby to 15.96 mi S of Appleby
Cause: Heavy Rain
Crop damage: $20,000
Reported by: River/Stream Gage
Coordinates: 44.640, -96.950

What these are

Flood: Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in South Dakota in 2022 Every state in 2022 This day in weather history Warnings in South Dakota, May 2022

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-30. Each event’s entry at NCEI: 1021184, 1018665, 1021182.