Alert archive / South Dakota / Tornado Warnings in 2026
Tornado Warning 4, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this tornado warning at May 17, 2026, 3:23 PM CDT for Hutchinson County, Turner County, Yankton County, South Dakota. It was in force for 52 min. 15 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 17, 2026, 3:23 PM CDT (20:23 UTC)
- Expired
- May 17, 2026, 4:15 PM CDT
- In force
- 52 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.5 in
Counties Hutchinson County, SD, Turner County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 74 km from the middle of the area, began a volume at 20:22 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 17, 3:36 PM CDT | HAIL 1 | 3 E Menno, SD | Corrects time of previous hail report from 3 E Menno. Via mping. Time estimated via radar. |
| May 17, 3:36 PM CDT | HAIL 1 | 3 E Menno, SD | Corrects time of previous hail report from 3 E Menno. Via mping. Time estimated via radar. |
| May 17, 3:36 PM CDT | HAIL 1.75 | 6 Ese Menno, SD | Photo of roughly golf ball size hail. Time estimated via radar. |
| May 17, 3:36 PM CDT | HAIL 1.75 | 6 Ese Menno, SD | Photo of roughly golf ball size hail. Time estimated via radar. |
| May 17, 3:37 PM CDT | TSTM WND DMG | 6 E Menno, SD | Large garage door on outbuilding bowed in. Time estimated from radar. |
| May 17, 3:37 PM CDT | TSTM WND DMG | 6 E Menno, SD | Large garage door on outbuilding bowed in. Time estimated from radar. |
| May 17, 3:38 PM CDT | TSTM WND GST 81 | 7 Ese Menno, SD | Mesonet station MNMS2 Menno 7ESE (SD Mesonet). |
| May 17, 3:38 PM CDT | TSTM WND GST 81 | 7 Ese Menno, SD | Mesonet station MNMS2 Menno 7ESE (SD Mesonet). |
| May 17, 3:39 PM CDT | TSTM WND DMG | 8 S Freeman, SD | Damage to large road signs near intersection of Hwy 18/81. |
| May 17, 3:39 PM CDT | TSTM WND DMG | 8 S Freeman, SD | Damage to large road signs near intersection of Hwy 18/81. |
| May 17, 3:44 PM CDT | HAIL 1 | 7 N Mayfield, SD | Via mping. Time estimated via radar. |
| May 17, 3:44 PM CDT | HAIL 1 | 7 N Mayfield, SD | Via mping. Time estimated via radar. |
| May 17, 3:47 PM CDT | TSTM WND GST 60 | 9 W Hurley, SD | Spotter estimated 50-60 mph winds along with half dollar size hail. |
| May 17, 3:47 PM CDT | TSTM WND GST 60 | 9 W Hurley, SD | Spotter estimated 50-60 mph winds along with half dollar size hail. |
| May 17, 4:06 PM CDT | TORNADO | 2 W Davis, SD | Video via social media of brief gustnado. Location estimated. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 17, 1:42 PM CDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 8.4 hours before the alert went out and 206 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2103 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 372 m²/s²
- 0-3 km storm-relative helicity
- 379 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
634
WFUS53 KFSD 172023
TORFSD
SDC067-125-135-172115-
/O.NEW.KFSD.TO.W.0004.260517T2023Z-260517T2115Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Sioux Falls SD
323 PM CDT Sun May 17 2026
The National Weather Service in Sioux Falls has issued a
* Tornado Warning for...
Northern Yankton County in southeastern South Dakota...
Southern Turner County in southeastern South Dakota...
Southeastern Hutchinson County in southeastern South Dakota...
* Until 415 PM CDT.
* At 323 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Scotland, or 16 miles northeast of Tyndall, moving
east at 50 mph.
HAZARD...Tornado and ping pong ball 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.
* This dangerous storm will be near...
Mayfield around 335 PM CDT.
Other locations in the path of this tornadic thunderstorm include
Viborg, Hurley and Davis.
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 4316 9763 4317 9766 4319 9767 4339 9702
4311 9694 4306 9763
TIME...MOT...LOC 2023Z 250DEG 43KT 4313 9759
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
$$
Weisser3 follow-up statements
424
WWUS53 KFSD 172037 RRA
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
337 PM CDT Sun May 17 2026
SDC067-125-135-172115-
/O.CON.KFSD.TO.W.0004.000000T0000Z-260517T2115Z/
Yankton SD-Turner SD-Hutchinson SD-
337 PM CDT Sun May 17 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM CDT FOR NORTHERN
YANKTON...SOUTHERN TURNER AND SOUTHEASTERN HUTCHINSON COUNTIES...
At 337 PM CDT, a severe thunderstorm capable of producing a tornado
was located 8 miles northwest of Mayfield, or 19 miles southwest of
Parker, moving east at 45 mph.
HAZARD...Tornado and golf ball size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Viborg, Hurley and Davis.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4316 9763 4317 9766 4319 9767 4339 9702
4311 9694 4306 9763
TIME...MOT...LOC 2037Z 248DEG 39KT 4319 9739
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
$$
Weisser701
WWUS53 KFSD 172050
SVSFSD
Severe Weather Statement
National Weather Service Sioux Falls SD
350 PM CDT Sun May 17 2026
SDC067-172059-
/O.CAN.KFSD.TO.W.0004.000000T0000Z-260517T2115Z/
Hutchinson SD-
350 PM CDT Sun May 17 2026
...THE TORNADO WARNING FOR SOUTHEASTERN HUTCHINSON 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 southeastern
South Dakota.
&&
LAT...LON 4317 9740 4339 9702 4311 9694 4308 9739
TIME...MOT...LOC 2049Z 252DEG 42KT 4323 9719
$$
SDC125-135-172115-
/O.CON.KFSD.TO.W.0004.000000T0000Z-260517T2115Z/
Yankton SD-Turner SD-
350 PM CDT Sun May 17 2026
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM CDT FOR
NORTHEASTERN YANKTON AND SOUTHERN TURNER COUNTIES...
At 349 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Hurley, or 12 miles south of Parker, moving east at
50 mph.
HAZARD...Tornado and golf ball size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Centerville, Viborg, Hurley, and Davis.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4317 9740 4339 9702 4311 9694 4308 9739
TIME...MOT...LOC 2049Z 252DEG 42KT 4323 9719
TORNADO...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
$$
Weisser639 WWUS53 KFSD 172111 SVSFSD Severe Weather Statement National Weather Service Sioux Falls SD 411 PM CDT Sun May 17 2026 SDC125-135-172121- /O.EXP.KFSD.TO.W.0004.000000T0000Z-260517T2115Z/ Yankton SD-Turner SD- 411 PM CDT Sun May 17 2026 ...THE TORNADO WARNING FOR NORTHEASTERN YANKTON AND SOUTHERN TURNER COUNTIES WILL EXPIRE AT 415 PM CDT... The storm which prompted the warning has moved out of the area. Therefore, the warning will be allowed to expire. However, small hail, gusty winds and heavy rain are still possible with this thunderstorm. A Tornado Watch remains in effect until 1000 PM CDT for southeastern South Dakota. && LAT...LON 4317 9740 4339 9702 4311 9694 4308 9739 TIME...MOT...LOC 2111Z 250DEG 43KT 4331 9689 $$ Weisser
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 17, 1:10 AM CDT | Flash Flood Warning | FSD | Union | 4 hr |
| May 17, 1:09 PM CDT | Severe Thunderstorm Warning | FSD | Gregory | 51 min |
| May 17, 2:10 PM CDT | Severe Thunderstorm Warning | FSD | Charles Mix, Gregory | 50 min |
| May 17, 2:15 PM CDT | Severe Thunderstorm Warning | FSD | Aurora, Brule, Charles Mix, Douglas | 45 min |
| May 17, 2:49 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Hutchinson, Yankton | 41 min |
| May 17, 2:50 PM CDT | Tornado Warning | FSD | Bon Homme, Charles Mix, Hutchinson | 40 min |
| May 17, 3:28 PM CDT | Severe Thunderstorm Warning | FSD | Bon Homme, Clay, Hutchinson, Turner, Yankton | 47 min |
| May 17, 3:35 PM CDT | Tornado Warning | FSD | Hutchinson, Turner | 28 min |
| May 17, 3:59 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Turner | 46 min |
| May 17, 4:18 PM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Minnehaha, Turner | 42 min |
| May 17, 4:27 PM CDT | Tornado Warning | FSD | Lincoln, Minnehaha | 48 min |
| May 17, 4:56 PM CDT | Severe Thunderstorm Warning | FSD | Minnehaha | 49 min |
Nearby
Tornado Warnings in South Dakota, 2026Every tornado warning in 2026Tornadoes in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.