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Severe Thunderstorm Warning 0218
Issued by the Sioux Falls Forecast Office

Action Issued Starts Expiration
New 2026-08-09 04:03:34 2026-08-09 04:03:00 2026-08-09 05:00:00
Continued 2026-08-09 04:12:19 2026-08-09 05:00:00
Cancelled 2026-08-09 04:36:35 2026-08-09 05:00:00
Continued 2026-08-09 04:36:35 2026-08-09 05:00:00
Expired 2026-08-09 04:51:06 2026-08-09 05:00:00


Action: New
Issued At: 2026-08-09 04:03:34

777 
WUUS53 KFSD 090903
SVRFSD
IAC059-MNC063-091000-
/O.NEW.KFSD.SV.W.0218.260809T0903Z-260809T1000Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
403 AM CDT Sun Aug 9 2026

The National Weather Service in Sioux Falls has issued a

* Severe Thunderstorm Warning for...
  Dickinson County in northwestern Iowa...
  South central Jackson County in southwestern Minnesota...

* Until 500 AM CDT.

* At 402 AM CDT, a severe thunderstorm was located near West Okoboji,
  or 10 miles southwest of Spirit Lake, moving northeast at 20 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.

* This severe thunderstorm will be near...
  Spirit Lake, Milford, Arnolds Park, Okoboji, Wahpeton, and West 
  Okoboji around 410 AM CDT.
  Orleans around 415 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4325 9521 4325 9524 4333 9535 4357 9512
      4344 9497
TIME...MOT...LOC 0902Z 231DEG 18KT 4332 9526 

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

$$

IG


Action: Continued
Issued At: 2026-08-09 04:12:19

035 
WWUS53 KFSD 090911
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
411 AM CDT Sun Aug 9 2026

IAC059-MNC063-091000-
/O.CON.KFSD.SV.W.0218.000000T0000Z-260809T1000Z/
Dickinson IA-Jackson MN-
411 AM CDT Sun Aug 9 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 AM CDT
FOR CENTRAL DICKINSON AND SOUTH CENTRAL JACKSON COUNTIES...

At 411 AM CDT, a severe thunderstorm was located over West Okoboji,
or near Spirit Lake, moving northeast at 25 mph.

HAZARD...Golf 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.

This severe storm will be near...
  Spirit Lake, Milford, Arnolds Park, Okoboji, Orleans, Wahpeton, 
  and West Okoboji around 415 AM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4327 9518 4337 9531 4357 9512 4344 9497
TIME...MOT...LOC 0911Z 228DEG 24KT 4335 9518 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

IG


Action: Cancelled
Issued At: 2026-08-09 04:36:35

683 
WWUS53 KFSD 090936
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
436 AM CDT Sun Aug 9 2026

MNC063-090945-
/O.CAN.KFSD.SV.W.0218.000000T0000Z-260809T1000Z/
Jackson MN-
436 AM CDT Sun Aug 9 2026

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL JACKSON 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 4330 9514 4333 9517 4346 9499 4344 9497
TIME...MOT...LOC 0935Z 244DEG 21KT 4341 9501 

$$

IAC059-091000-
/O.CON.KFSD.SV.W.0218.000000T0000Z-260809T1000Z/
Dickinson IA-
436 AM CDT Sun Aug 9 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 AM CDT
FOR SOUTHEASTERN DICKINSON COUNTY...

At 435 AM CDT, a severe thunderstorm was located near Superior, or
near Spirit Lake, moving northeast at 25 mph.

HAZARD...Golf 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.

This severe thunderstorm will remain over mainly rural areas of
southeastern Dickinson County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4330 9514 4333 9517 4346 9499 4344 9497
TIME...MOT...LOC 0935Z 244DEG 21KT 4341 9501 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

IG


Action: Continued
Issued At: 2026-08-09 04:36:35

683 
WWUS53 KFSD 090936
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
436 AM CDT Sun Aug 9 2026

MNC063-090945-
/O.CAN.KFSD.SV.W.0218.000000T0000Z-260809T1000Z/
Jackson MN-
436 AM CDT Sun Aug 9 2026

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL JACKSON 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 4330 9514 4333 9517 4346 9499 4344 9497
TIME...MOT...LOC 0935Z 244DEG 21KT 4341 9501 

$$

IAC059-091000-
/O.CON.KFSD.SV.W.0218.000000T0000Z-260809T1000Z/
Dickinson IA-
436 AM CDT Sun Aug 9 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 AM CDT
FOR SOUTHEASTERN DICKINSON COUNTY...

At 435 AM CDT, a severe thunderstorm was located near Superior, or
near Spirit Lake, moving northeast at 25 mph.

HAZARD...Golf 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.

This severe thunderstorm will remain over mainly rural areas of
southeastern Dickinson County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4330 9514 4333 9517 4346 9499 4344 9497
TIME...MOT...LOC 0935Z 244DEG 21KT 4341 9501 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

IG


Action: Expired
Issued At: 2026-08-09 04:51:06

049 
WWUS53 KFSD 090950
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
450 AM CDT Sun Aug 9 2026

IAC059-091000-
/O.EXP.KFSD.SV.W.0218.000000T0000Z-260809T1000Z/
Dickinson IA-
450 AM CDT Sun Aug 9 2026

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DICKINSON COUNTY
WILL EXPIRE AT 500 AM CDT...

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

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

&&

LAT...LON 4330 9514 4333 9517 4346 9499 4344 9497
TIME...MOT...LOC 0950Z 231DEG 18KT 4346 9493 

$$

IG



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