Alert archive / South Dakota / Tornado Warnings in 2025

Tornado Warning 3, NWS Sioux Falls, SD

July 7, 2025Yankton County, South Dakota

NWS Sioux Falls, SD issued this tornado warning at Jul 7, 2025, 6:15 PM CDT for Yankton County, South Dakota. It was in force for 30 min. 2 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: Jul 7, 2025, 6:15 PM CDT (23:15 UTC)
Expired: Jul 7, 2025, 6:45 PM CDT
In force: 30 min
Issued by: NWS Sioux Falls, SD
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Yankton County, SD

The radar

The Sioux Falls radar (KFSD), 93 km from the middle of the area, began a volume at 23:18 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
Jul 7, 6:39 PM CDT	TSTM WND GST 68	2 Ne Yankton, SD	AWOS station KYKN Yankton Municipal Airport.
Jul 7, 6:46 PM CDT	TSTM WND DMG	Yankton, SD	Large tree limbs down in Yankton. Time estimated from radar.

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
Jul 7, 3:14 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 11.3 hours before the alert went out and 236 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 243 J/kg
Mixed-layer CIN: -125 J/kg
Mixed-layer LCL: 1168 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 164 m²/s²
0-3 km storm-relative helicity: 160 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

138 
WFUS53 KFSD 072315
TORFSD
SDC135-072345-
/O.NEW.KFSD.TO.W.0003.250707T2315Z-250707T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Sioux Falls SD
615 PM CDT Mon Jul 7 2025

The National Weather Service in Sioux Falls has issued a

* Tornado Warning for...
  Southern Yankton County in southeastern South Dakota...

* Until 645 PM CDT.

* At 614 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Utica, or 7 miles northwest of Yankton, moving
  southeast at 15 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...
  Yankton and Lewis And Clark State Recreation Area around 620 PM 
  CDT.
  Mission Hill around 630 PM CDT.

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 4300 9755 4308 9740 4286 9720 4285 9729
      4287 9730 4286 9737 4286 9742 4285 9743
      4285 9748
TIME...MOT...LOC 2314Z 332DEG 14KT 4298 9747 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

Weisser

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 7, 3:01 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Sanborn	44 min
Jul 7, 3:20 PM CDT	Severe Thunderstorm Warning	FSD	Aurora, Jerauld, Sanborn	40 min
Jul 7, 3:49 PM CDT	Severe Thunderstorm Warning	FSD	Brule, Charles Mix, Gregory	41 min
Jul 7, 3:59 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix, Gregory	46 min
Jul 7, 4:10 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Lake, McCook, Miner	26 min
Jul 7, 4:46 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix	44 min
Jul 7, 5:23 PM CDT	Severe Thunderstorm Warning	FSD	Hutchinson, McCook, Turner	52 min
Jul 7, 5:30 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Yankton	45 min
Jul 7, 5:35 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme, Charles Mix	40 min
Jul 7, 5:49 PM CDT	Severe Thunderstorm Warning	FSD	Hutchinson, Turner	41 min
Jul 7, 6:06 PM CDT	Severe Thunderstorm Warning	FSD	Yankton	39 min
Jul 7, 6:27 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Lincoln, Turner	63 min
Jul 7, 6:44 PM CDT	Severe Thunderstorm Warning Considerable damage threat	FSD	Yankton	35 min

Nearby

Tornado Warnings in South Dakota, 2025 Every tornado warning in 2025 Tornadoes in 2025

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.