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Severe Thunderstorm Warning 0215
Issued by the Sioux Falls Forecast Office

Action Issued Starts Expiration
New 2026-08-07 07:27:40 2026-08-07 07:27:00 2026-08-07 08:15:00
Continued 2026-08-07 07:39:40 2026-08-07 08:15:00
Cancelled 2026-08-07 07:50:11 2026-08-07 08:15:00


Action: New
Issued At: 2026-08-07 07:27:40

884 
WUUS53 KFSD 071227
SVRFSD
IAC059-143-MNC063-105-071315-
/O.NEW.KFSD.SV.W.0215.260807T1227Z-260807T1315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Sioux Falls SD
727 AM CDT Fri Aug 7 2026

The National Weather Service in Sioux Falls has issued a

* Severe Thunderstorm Warning for...
  Northern Osceola County in northwestern Iowa...
  Northwestern Dickinson County in northwestern Iowa...
  Western Jackson County in southwestern Minnesota...
  Southeastern Nobles County in southwestern Minnesota...

* Until 815 AM CDT.

* At 726 AM CDT, severe thunderstorms were located along a line
  extending from near Worthington to 7 miles southeast of Rushmore,
  moving east at 40 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.

* Severe thunderstorms will be near...
  Worthington around 730 AM CDT.
  Brewster and Round Lake around 735 AM CDT.

Other locations in the path of these severe thunderstorms include
Lakefield.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4340 9515 4345 9586 4374 9568 4378 9505
TIME...MOT...LOC 1226Z 268DEG 34KT 4365 9565 4353 9571 

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

$$

JH


Action: Continued
Issued At: 2026-08-07 07:39:40

165 
WWUS53 KFSD 071239
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
739 AM CDT Fri Aug 7 2026

IAC059-143-MNC063-105-071315-
/O.CON.KFSD.SV.W.0215.000000T0000Z-260807T1315Z/
Osceola IA-Dickinson IA-Jackson MN-Nobles MN-
739 AM CDT Fri Aug 7 2026

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 AM CDT
FOR NORTHERN OSCEOLA...NORTHWESTERN DICKINSON...SOUTHWESTERN JACKSON
AND SOUTHEASTERN NOBLES COUNTIES...

At 738 AM CDT, severe thunderstorms were located along a line 
extending from near Round Lake to 6 miles northwest of Ocheyedan, 
moving east at 40 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

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

These severe storms will be near...
  Round Lake through 745 AM CDT.
  Harris around 745 AM CDT.

Other locations in the path of these severe thunderstorms include
Lake Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4344 9579 4367 9565 4372 9507 4340 9515
TIME...MOT...LOC 1238Z 271DEG 35KT 4360 9547 4351 9556 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

JH


Action: Cancelled
Issued At: 2026-08-07 07:50:11

466 
WWUS53 KFSD 071249
SVSFSD

Severe Weather Statement
National Weather Service Sioux Falls SD
749 AM CDT Fri Aug 7 2026

IAC059-143-MNC063-105-071258-
/O.CAN.KFSD.SV.W.0215.000000T0000Z-260807T1315Z/
Osceola IA-Dickinson IA-Jackson MN-Nobles MN-
749 AM CDT Fri Aug 7 2026

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN OSCEOLA...
NORTHWESTERN DICKINSON...SOUTHWESTERN JACKSON AND SOUTHEASTERN NOBLES
COUNTIES IS CANCELLED...

The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled.  However, gusty winds are
still possible with these thunderstorms.

&&

LAT...LON 4344 9579 4367 9565 4372 9507 4340 9515
TIME...MOT...LOC 1245Z 268DEG 34KT 4360 9538 4351 9547 

$$

JH



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