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Home Return to list Tornado Warning 0006 Issued by the Sioux Falls Forecast Office
Action: New Issued At: 2026-05-17 16:27:59
544
WFUS53 KFSD 172127
TORFSD
IAC119-SDC083-099-172215-
/O.NEW.KFSD.TO.W.0006.260517T2127Z-260517T2215Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Sioux Falls SD
427 PM CDT Sun May 17 2026
The National Weather Service in Sioux Falls has issued a
* Tornado Warning for...
Northwestern Lyon County in northwestern Iowa...
Southeastern Minnehaha County in southeastern South Dakota...
Northern Lincoln County in southeastern South Dakota...
* Until 515 PM CDT.
* At 427 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Tea, or 9 miles southwest of Sioux Falls, moving
east at 40 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This dangerous storm will be near...
Sioux Falls, Harrisburg, and Tea around 430 PM CDT.
Lake Alvin State Recreation Area around 435 PM CDT.
Rowena around 440 PM CDT.
Larchwood around 445 PM CDT.
Other locations in the path of this tornadic thunderstorm include
Valley Springs.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4338 9692 4350 9690 4358 9646 4339 9644
TIME...MOT...LOC 2127Z 256DEG 36KT 4344 9686
TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
$$
Weisser
Action: Continued Issued At: 2026-05-17 16:45:00
224
WWUS53 KFSD 172144
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
444 PM CDT Sun May 17 2026
IAC119-SDC083-099-172215-
/O.CON.KFSD.TO.W.0006.000000T0000Z-260517T2215Z/
Lyon IA-Minnehaha SD-Lincoln SD-
444 PM CDT Sun May 17 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM CDT FOR
NORTHWESTERN LYON...SOUTHEASTERN MINNEHAHA AND NORTHEASTERN LINCOLN
COUNTIES...
At 444 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Lake Alvin State Recreation Area, or near Sioux
Falls, moving east at 35 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Sioux Falls, Larchwood, Valley Springs and Rowena.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4339 9676 4352 9680 4358 9646 4339 9644
TIME...MOT...LOC 2144Z 248DEG 28KT 4349 9666
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
Weisser
Action: Cancelled Issued At: 2026-05-17 17:02:30
753
WWUS53 KFSD 172201
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
501 PM CDT Sun May 17 2026
SDC083-172211-
/O.CAN.KFSD.TO.W.0006.000000T0000Z-260517T2215Z/
Lincoln SD-
501 PM CDT Sun May 17 2026
...THE TORNADO WARNING FOR NORTHEASTERN LINCOLN COUNTY IS
CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 1000 PM CDT for northwestern
Iowa...southwestern Minnesota...and southeastern South Dakota.
&&
LAT...LON 4343 9656 4355 9659 4358 9646 4339 9644
TIME...MOT...LOC 2201Z 257DEG 31KT 4351 9650
$$
IAC119-SDC099-172215-
/O.CON.KFSD.TO.W.0006.000000T0000Z-260517T2215Z/
Lyon IA-Minnehaha SD-
501 PM CDT Sun May 17 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM CDT FOR
NORTHWESTERN LYON AND SOUTHEASTERN MINNEHAHA COUNTIES...
At 501 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Rowena, or 11 miles east of Sioux Falls, moving east
at 35 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Larchwood, Valley Springs, and Rowena.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4343 9656 4355 9659 4358 9646 4339 9644
TIME...MOT...LOC 2201Z 257DEG 31KT 4351 9650
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
Weisser
Action: Continued Issued At: 2026-05-17 17:02:30
753
WWUS53 KFSD 172201
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
501 PM CDT Sun May 17 2026
SDC083-172211-
/O.CAN.KFSD.TO.W.0006.000000T0000Z-260517T2215Z/
Lincoln SD-
501 PM CDT Sun May 17 2026
...THE TORNADO WARNING FOR NORTHEASTERN LINCOLN COUNTY IS
CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 1000 PM CDT for northwestern
Iowa...southwestern Minnesota...and southeastern South Dakota.
&&
LAT...LON 4343 9656 4355 9659 4358 9646 4339 9644
TIME...MOT...LOC 2201Z 257DEG 31KT 4351 9650
$$
IAC119-SDC099-172215-
/O.CON.KFSD.TO.W.0006.000000T0000Z-260517T2215Z/
Lyon IA-Minnehaha SD-
501 PM CDT Sun May 17 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM CDT FOR
NORTHWESTERN LYON AND SOUTHEASTERN MINNEHAHA COUNTIES...
At 501 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Rowena, or 11 miles east of Sioux Falls, moving east
at 35 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Larchwood, Valley Springs, and Rowena.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4343 9656 4355 9659 4358 9646 4339 9644
TIME...MOT...LOC 2201Z 257DEG 31KT 4351 9650
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
$$
Weisser
Action: Expired Issued At: 2026-05-17 17:09:16 876 WWUS53 KFSD 172208 SVSFSD Severe Weather Statement National Weather Service Sioux Falls SD 508 PM CDT Sun May 17 2026 IAC119-SDC099-172218- /O.EXP.KFSD.TO.W.0006.000000T0000Z-260517T2215Z/ Lyon IA-Minnehaha SD- 508 PM CDT Sun May 17 2026 ...THE TORNADO WARNING FOR NORTHWESTERN LYON AND SOUTHEASTERN MINNEHAHA COUNTIES WILL EXPIRE AT 515 PM CDT... The storm which prompted the warning has moved out of the area. Therefore, the warning will be allowed to expire. However, gusty winds and heavy rain are still possible with this thunderstorm. A Tornado Watch remains in effect until 1000 PM CDT for northwestern Iowa...southwestern Minnesota...and southeastern South Dakota. && LAT...LON 4343 9656 4355 9659 4358 9646 4339 9644 TIME...MOT...LOC 2208Z 256DEG 36KT 4353 9641 $$ Weisser | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||