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Severe Thunderstorm Warning 0047
Issued by the Sioux Falls Forecast Office

Action Issued Starts Expiration
New 2026-05-17 19:20:35 2026-05-17 19:20:00 2026-05-17 20:00:00
Cancelled 2026-05-17 19:49:06 2026-05-17 20:00:00


Action: New
Issued At: 2026-05-17 19:20:35

918 
WUUS53 KFSD 180020
SVRFSD
IAC149-167-180100-
/O.NEW.KFSD.SV.W.0047.260518T0020Z-260518T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
720 PM CDT Sun May 17 2026

The National Weather Service in Sioux Falls has issued a

* Severe Thunderstorm Warning for...
  Southeastern Sioux County in northwestern Iowa...
  Northeastern Plymouth County in northwestern Iowa...

* Until 800 PM CDT.

* At 719 PM CDT, a severe thunderstorm was located near Alton, or
  near Orange City, moving northeast at 20 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.

* This severe thunderstorm will be near...
  Orange City, Alton, and Granville around 725 PM CDT.
  Hospers around 735 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

A Tornado Watch remains in effect until 1000 PM CDT for northwestern
Iowa.

&&

LAT...LON 4304 9623 4312 9587 4283 9586 4281 9612
TIME...MOT...LOC 0019Z 243DEG 19KT 4293 9605 

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

$$

BP


Action: Cancelled
Issued At: 2026-05-17 19:49:06

982 
WWUS53 KFSD 180048
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
748 PM CDT Sun May 17 2026

IAC149-167-180058-
/O.CAN.KFSD.SV.W.0047.000000T0000Z-260518T0100Z/
Sioux IA-Plymouth IA-
748 PM CDT Sun May 17 2026

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SIOUX AND
NORTHEASTERN PLYMOUTH COUNTIES IS CANCELLED...

The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

A Tornado Watch remains in effect until 1000 PM CDT for northwestern
Iowa.

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

&&

LAT...LON 4304 9623 4312 9587 4283 9586 4281 9612
TIME...MOT...LOC 0046Z 243DEG 19KT 4300 9586 

$$

BP



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