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Home Return to list Severe Thunderstorm Warning 0054 Issued by the Sioux Falls Forecast Office
Action: New Issued At: 2026-05-18 18:08:30
687
WUUS53 KFSD 182308
SVRFSD
IAC149-167-NEC043-051-SDC027-127-182345-
/O.NEW.KFSD.SV.W.0054.260518T2308Z-260518T2345Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
608 PM CDT Mon May 18 2026
The National Weather Service in Sioux Falls has issued a
* Severe Thunderstorm Warning for...
Southwestern Sioux County in northwestern Iowa...
Northwestern Plymouth County in northwestern Iowa...
Northwestern Dakota County in northeastern Nebraska...
Northeastern Dixon County in northeastern Nebraska...
Southeastern Clay County in southeastern South Dakota...
Union County in southeastern South Dakota...
* Until 645 PM CDT.
* At 607 PM CDT, a severe thunderstorm was located over Martinsburg,
or near Ponca, moving north at 60 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Trained weather spotters. At 605pm, a trained weather
spotter reported quarter size hail in Allen, Nebraska!
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* This severe thunderstorm will be near...
Ponca, Newcastle, Martinsburg, and Ponca State Park around 610 PM
CDT.
Elk Point around 615 PM CDT.
Akron around 625 PM CDT.
Other locations in the path of this severe thunderstorm include
Hawarden and Alcester.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4240 9673 4244 9693 4306 9679 4296 9632
TIME...MOT...LOC 2307Z 200DEG 50KT 4249 9680
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Meyers
Action: Cancelled Issued At: 2026-05-18 18:17:30
123
WWUS53 KFSD 182317
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
617 PM CDT Mon May 18 2026
SDC027-182326-
/O.CAN.KFSD.SV.W.0054.000000T0000Z-260518T2345Z/
Clay SD-
617 PM CDT Mon May 18 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CLAY COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
&&
LAT...LON 4253 9687 4305 9673 4297 9636 4296 9635
4249 9669
TIME...MOT...LOC 2316Z 201DEG 46KT 4257 9675
$$
IAC149-167-NEC043-051-SDC127-182345-
/O.CON.KFSD.SV.W.0054.000000T0000Z-260518T2345Z/
Sioux IA-Plymouth IA-Dakota NE-Dixon NE-Union SD-
617 PM CDT Mon May 18 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR SOUTHWESTERN SIOUX...NORTHWESTERN PLYMOUTH...NORTHWESTERN
DAKOTA...NORTHEASTERN DIXON AND UNION COUNTIES...
At 616 PM CDT, a severe thunderstorm was located over Ponca, moving
north at 55 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Trained weather spotters. At 610pm, trained weather
spotters reported quarter size hail 3 miles southwest of
Ponca, Nebraska!
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.
This severe storm will be near...
Elk Point and Ponca State Park around 620 PM CDT.
Other locations in the path of this severe thunderstorm include
Akron, Hawarden and Alcester.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4253 9687 4305 9673 4297 9636 4296 9635
4249 9669
TIME...MOT...LOC 2316Z 201DEG 46KT 4257 9675
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Meyers
Action: Continued Issued At: 2026-05-18 18:17:30
123
WWUS53 KFSD 182317
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
617 PM CDT Mon May 18 2026
SDC027-182326-
/O.CAN.KFSD.SV.W.0054.000000T0000Z-260518T2345Z/
Clay SD-
617 PM CDT Mon May 18 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CLAY COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
&&
LAT...LON 4253 9687 4305 9673 4297 9636 4296 9635
4249 9669
TIME...MOT...LOC 2316Z 201DEG 46KT 4257 9675
$$
IAC149-167-NEC043-051-SDC127-182345-
/O.CON.KFSD.SV.W.0054.000000T0000Z-260518T2345Z/
Sioux IA-Plymouth IA-Dakota NE-Dixon NE-Union SD-
617 PM CDT Mon May 18 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR SOUTHWESTERN SIOUX...NORTHWESTERN PLYMOUTH...NORTHWESTERN
DAKOTA...NORTHEASTERN DIXON AND UNION COUNTIES...
At 616 PM CDT, a severe thunderstorm was located over Ponca, moving
north at 55 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Trained weather spotters. At 610pm, trained weather
spotters reported quarter size hail 3 miles southwest of
Ponca, Nebraska!
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.
This severe storm will be near...
Elk Point and Ponca State Park around 620 PM CDT.
Other locations in the path of this severe thunderstorm include
Akron, Hawarden and Alcester.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4253 9687 4305 9673 4297 9636 4296 9635
4249 9669
TIME...MOT...LOC 2316Z 201DEG 46KT 4257 9675
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Meyers
Action: Cancelled Issued At: 2026-05-18 18:30:01
557
WWUS53 KFSD 182329
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
629 PM CDT Mon May 18 2026
NEC043-051-182338-
/O.CAN.KFSD.SV.W.0054.000000T0000Z-260518T2345Z/
Dakota NE-Dixon NE-
629 PM CDT Mon May 18 2026
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN DAKOTA AND
NORTHEASTERN DIXON COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
&&
LAT...LON 4264 9661 4268 9678 4304 9666 4297 9636
4296 9635 4276 9650
TIME...MOT...LOC 2328Z 202DEG 50KT 4273 9665
$$
IAC149-167-SDC127-182345-
/O.CON.KFSD.SV.W.0054.000000T0000Z-260518T2345Z/
Sioux IA-Plymouth IA-Union SD-
629 PM CDT Mon May 18 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR SOUTHWESTERN SIOUX...NORTHWESTERN PLYMOUTH AND CENTRAL UNION
COUNTIES...
At 628 PM CDT, a severe thunderstorm was located near Elk Point, or
11 miles north of Ponca, moving north at 60 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Trained weather spotters. At 615pm, trained weather
spotters reported ping pong ball size hail 2 miles
west/northwest of Ponca, Nebraska!
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.
This severe storm will be near...
Akron around 635 PM CDT.
Other locations in the path of this severe thunderstorm include
Hawarden and Alcester.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4264 9661 4268 9678 4304 9666 4297 9636
4296 9635 4276 9650
TIME...MOT...LOC 2328Z 202DEG 50KT 4273 9665
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Meyers
Action: Continued Issued At: 2026-05-18 18:30:01
557
WWUS53 KFSD 182329
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
629 PM CDT Mon May 18 2026
NEC043-051-182338-
/O.CAN.KFSD.SV.W.0054.000000T0000Z-260518T2345Z/
Dakota NE-Dixon NE-
629 PM CDT Mon May 18 2026
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN DAKOTA AND
NORTHEASTERN DIXON COUNTIES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
&&
LAT...LON 4264 9661 4268 9678 4304 9666 4297 9636
4296 9635 4276 9650
TIME...MOT...LOC 2328Z 202DEG 50KT 4273 9665
$$
IAC149-167-SDC127-182345-
/O.CON.KFSD.SV.W.0054.000000T0000Z-260518T2345Z/
Sioux IA-Plymouth IA-Union SD-
629 PM CDT Mon May 18 2026
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR SOUTHWESTERN SIOUX...NORTHWESTERN PLYMOUTH AND CENTRAL UNION
COUNTIES...
At 628 PM CDT, a severe thunderstorm was located near Elk Point, or
11 miles north of Ponca, moving north at 60 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Trained weather spotters. At 615pm, trained weather
spotters reported ping pong ball size hail 2 miles
west/northwest of Ponca, Nebraska!
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.
This severe storm will be near...
Akron around 635 PM CDT.
Other locations in the path of this severe thunderstorm include
Hawarden and Alcester.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4264 9661 4268 9678 4304 9666 4297 9636
4296 9635 4276 9650
TIME...MOT...LOC 2328Z 202DEG 50KT 4273 9665
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Meyers
Action: Expired Issued At: 2026-05-18 18:43:01
821
WWUS53 KFSD 182342
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
642 PM CDT Mon May 18 2026
IAC149-167-SDC127-182352-
/O.EXP.KFSD.SV.W.0054.000000T0000Z-260518T2345Z/
Sioux IA-Plymouth IA-Union SD-
642 PM CDT Mon May 18 2026
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN SIOUX...
NORTHWESTERN PLYMOUTH AND CENTRAL UNION COUNTIES WILL EXPIRE AT 645
PM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However, small
hail is still possible with this thunderstorm.
&&
LAT...LON 4264 9661 4268 9678 4304 9666 4297 9636
4296 9635 4276 9650
TIME...MOT...LOC 2342Z 200DEG 50KT 4290 9656
$$
Meyers
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