Severe Thunderstorm Warning 84, NWS Sioux Falls, SD

704 
WWUS53 KFSD 010158
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
858 PM CDT Sun May 31 2026

SDC135-010208-
/O.CAN.KFSD.SV.W.0084.000000T0000Z-260601T0245Z/
Yankton SD-
858 PM CDT Sun May 31 2026

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL YANKTON COUNTY IS
CANCELLED...

The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
southeastern South Dakota.

&&

LAT...LON 4286 9713 4299 9715 4318 9702 4320 9679
      4309 9679 4308 9681 4304 9680 4285 9681
TIME...MOT...LOC 0158Z 226DEG 11KT 4297 9713 

$$

SDC027-083-125-010245-
/O.CON.KFSD.SV.W.0084.000000T0000Z-260601T0245Z/
Clay SD-Lincoln SD-Turner SD-
858 PM CDT Sun May 31 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM CDT
FOR CLAY...SOUTHWESTERN LINCOLN AND SOUTHEASTERN TURNER COUNTIES...

At 858 PM CDT, a severe thunderstorm was located over Volin, or 14
miles east of Yankton, moving northeast at 15 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Beresford, Centerville, and Wakonda.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4286 9713 4299 9715 4318 9702 4320 9679
      4309 9679 4308 9681 4304 9680 4285 9681
TIME...MOT...LOC 0158Z 226DEG 11KT 4297 9713 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

BP

789 
WWUS53 KFSD 010214
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
914 PM CDT Sun May 31 2026

SDC027-083-125-010245-
/O.CON.KFSD.SV.W.0084.000000T0000Z-260601T0245Z/
Clay SD-Lincoln SD-Turner SD-
914 PM CDT Sun May 31 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM CDT
FOR NORTHEASTERN CLAY...SOUTHWESTERN LINCOLN AND SOUTHEASTERN TURNER
COUNTIES...

At 914 PM CDT, a severe thunderstorm was located 7 miles southwest of
Beresford, moving east at 25 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Beresford and Centerville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.

&&

LAT...LON 4286 9699 4300 9702 4318 9694 4320 9679
      4309 9679 4308 9681 4304 9680 4285 9681
TIME...MOT...LOC 0214Z 251DEG 21KT 4301 9689 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

BP

678 
WWUS53 KFSD 010245
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
945 PM CDT Sun May 31 2026

SDC027-083-125-010255-
/O.EXP.KFSD.SV.W.0084.000000T0000Z-260601T0245Z/
Clay SD-Lincoln SD-Turner SD-
945 PM CDT Sun May 31 2026

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CLAY...
SOUTHWESTERN LINCOLN AND SOUTHEASTERN TURNER COUNTIES HAS EXPIRED...

The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.

A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
southeastern South Dakota.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Sioux Falls.

Remember, a Severe Thunderstorm Warning still remains in effect for 
eastern Clay County Iowa until 1030 PM CDT.


&&

LAT...LON 4286 9699 4300 9702 4318 9694 4320 9679
      4309 9679 4308 9681 4304 9680 4285 9681
TIME...MOT...LOC 0245Z 226DEG 11KT 4307 9680 

$$

BP

Area Forecast Discussion
National Weather Service Sioux Falls SD
Issued by National Weather Service Rapid City SD
655 PM CDT Sun May 31 2026

.KEY MESSAGES...

- Isolated to scattered thunderstorms should develop late this
  afternoon into early evening. Large hail up to half dollar and
  damaging winds to 60 mph would be the main hazards. A Level 1
  of 5 risk for severe storms covers most of the area for this
  threat.

- Similar to today, a conditional Level 1 of 5 risk for severe
  storms covers the forecast area Monday afternoon. The chance
  of development looks lower than today, but if a storm can
  form, large hail and isolated damaging winds could occur.

- High chances (50-80%) for rain will persist through the bulk
  of next week. However, severe storm chances continue to look
  low (near 5% or less) through next week. The better chances
  for rainfall appear to be Wednesday in central SD and
  Wednesday night into Thursday area wide.

&&

.DISCUSSION...
Issued at 1235 PM CDT Sun May 31 2026

An active pattern is expected over the next several days, although
severe weather appears to remain a minor threat. Patchy heavy rain
may play the bigger role with each event.

For this afternoon and tonight, a small corridor of low level
convergence and lift will focus near and just east of the James
Valley. Clouds have cleared through early afternoon and temperatures
have risen a touch. Along with this temperature rise is a turn in
the surface winds to a more south to southwest direction vs.
southeast. This is what is aiding in this low level convergence. The
latest model soundings indicate something around 1500-2000 J/kg CAPE
but weak, disorganized shear. This suggests severe weather should
remain limited, but maybe a cell merger or two could produce a
couple of updrafts strong enough to support hail to half dollar
and wind gusts to 60 mph. Stronger storms will likely drift
east or northeast at about 15 mph, so fairly slow moving. With
this slower storm motion in mind, will need to keep an eye on
the locally heavy rain potential. A handful of the latest hi-res
models are showing small areas of 1-3" of rain with this
development. One area to keep a closer eye on will be parts of
Western Lake county, Northeast McCook and western Minnehaha
where 1-3" of rain fell late last night.

The question becomes what will drive development; will it be diurnal
heating, which would allow updrafts to start developing around 19-
21z, or will it be the weak wave which moves into the area closer to
0-3z this evening. The latest HRRR and Nam output agree with the
later start times, with the Nam indicating a stronger cap and less
development, while the RRFS and RAP kick off development a little
sooner with weaker capping. With the clearing that we are seeing in
central SD towards the James Valley we may see some development by
mid to late afternoon as destabilization is more likely. Suspect
some development between about 5-6pm.

One last thing to watch out for, if we can get mid to late afternoon
development, the LFC are marginally low and a weak convergent
boundary should be in parts of south central and southeast SD, so an
isolated funnel or two will be possible.

While a marginal risk for severe weather is in place for Monday,
confidence in the chances of development are very low. A capping
inversion may win out and for now CAPE values only running around
1000 J/kg with continued weak shear, albeit a little bit better than
today.

Another wave moves through Tuesday but weak shear and weak
instability suggest if anything can develop severe weather is very
unlikely.

Wednesday into Thursday looks like the better chance for more clouds
and better rainfall chances. Broad southerly warm advection looks to
bring in some weak elevated instability as low pressure tracks east
through ND. For now not anticipating all day rainfall but should see
off and on chances Wednesday and Thursday as this low tracks by to
the north.

Friday into Sunday will see periodic weaker waves move through the
area with a continuation of relatively weak flow aloft. This
continued weaker shear environment should keep severe weather
threats very limited.

&&

.AVIATION...(For the 00Z TAFS Through 00Z Monday Evening)
Issued At 651 PM CDT Sun May 31 2026

Isolated showers and thunderstorms will continue to be possible
across the area through the early evening hours. Low stratus is
expected to develop tonight over southwest Minnesota and eastern
South Dakota, especially near and east of I-29. Highest confidence
location for this MVFR to IFR stratus regarding the TAF sites will
be at KFSD. Winds will turn light through the overnight hours, and
this could also result in fog, though confidence is a bit lower in
development. Additional showers and storms may develop Monday
afternoon, but low confidence in development and location of these
storms preclude mention in the TAFs at this time.

&&

.FSD WATCHES/WARNINGS/ADVISORIES...
SD...None.
MN...None.
IA...None.
NE...None.

&&

DISCUSSION...08
AVIATION...13

Hazardous Weather Outlook
National Weather Service Sioux Falls SD
133 PM CDT Sun May 31 2026

IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097-
098-NEZ013-014-SDZ038>040-050-052>071-011845-
Lyon-Osceola-Dickinson-Sioux-O'Brien-Clay-Plymouth-Cherokee-
Buena Vista-Woodbury-Ida-Lincoln-Murray-Cottonwood-Nobles-Jackson-
Pipestone-Rock-Dixon-Dakota-Beadle-Kingsbury-Brookings-Gregory-
Jerauld-Sanborn-Miner-Lake-Moody-Brule-Aurora-Davison-Hanson-McCook-
Minnehaha-Charles Mix-Douglas-Hutchinson-Turner-Bon Homme-Yankton-
Union-
133 PM CDT Sun May 31 2026

This Hazardous Weather Outlook is for northwest Iowa, west central
Iowa, southwest Minnesota, northeast Nebraska, central South
Dakota, east central South Dakota, south central South Dakota and
southeast South Dakota.

.DAY ONE...This afternoon and tonight.

A Level 1 of 5 risk for severe storms is in place for late this
afternoon and evening. Isolated to scattered thunderstorms should
develop late this afternoon between the James River and I-29, then
progress eastward through the evening. A very isolated stronger
storm could produce hail to half dollar and wind gusts to 60 mph.
Locally heavier rain will also be possible with small swaths of one
to three inches of rainfall.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

There is a low chance for storms again Monday afternoon. Similar to
today, confidence in storm development is low. However, if storms
can develop, isolated damaging winds and large hail would be the
main threats.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

Preliminary Local Storm Report
National Weather Service Sioux Falls SD
724 PM CDT Sun May 31 2026

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

0723 PM     Rain             Emery                   43.60N 97.62W
05/31/2026  M3.50 Inch       Hanson             SD   Law Enforcement

&&

PR

Preliminary Local Storm Report
National Weather Service Sioux Falls SD
738 PM CDT Sun May 31 2026

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

0726 PM     Hail             2 WSW Humboldt          43.63N 97.12W
05/31/2026  M1.00 Inch       Minnehaha          SD   Trained Spotter

            In addition to hail up to the size of
            quarters, heavy rainfall was reported.

&&

TRM

Preliminary Local Storm Report
National Weather Service Sioux Falls SD
740 PM CDT Sun May 31 2026

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

0733 PM     Hail             4 SW Hurley             43.24N 97.15W
05/31/2026  E1.00 Inch       Turner             SD   Fire Dept/Rescue

&&

TRM

Preliminary Local Storm Report
National Weather Service Sioux Falls SD
805 PM CDT Sun May 31 2026

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

0754 PM     Hail             2 WNW Davis             43.27N 97.04W
05/31/2026  E1.00 Inch       Turner             SD   Public

&&

TRM

Preliminary Local Storm Report
National Weather Service Sioux Falls SD
818 PM CDT Sun May 31 2026

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

0817 PM     Hail             Wakonda                 43.01N 97.11W
05/31/2026  E0.88 Inch       Clay               SD   Trained Spotter

&&

TRM

Preliminary Local Storm Report
National Weather Service Sioux Falls SD
823 PM CDT Sun May 31 2026

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

0811 PM     Tornado          4 W Wall Lake           43.53N 97.03W
05/31/2026                   Minnehaha          SD   NWS Employee

            Radar confirmed tonado.

&&

TRM