Alert archive / South Dakota / Severe Thunderstorm Watches in 2025

Severe Thunderstorm Watch 421

June 15, 202526 counties in South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jun 15, 2025, 6:51 PM MDT for 26 counties in South Dakota. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
Jun 15, 2025, 6:51 PM MDT (00:51 UTC)
Expired
Jun 16, 2025, 3:00 AM MDT
In force
8 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
75 kt
All 26 counties

Bennett County, SD, Butte County, SD, Campbell County, SD, Corson County, SD, Custer County, SD, Dewey County, SD, Fall River County, SD, Haakon County, SD, Harding County, SD, Hughes County, SD, Jackson County, SD, Jones County, SD, Lawrence County, SD, Lyman County, SD, Meade County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Perkins County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Todd County, SD, Tripp County, SD, Walworth County, SD, Ziebach County, SD

The radar

The Rapid City radar (KUDX), 74 km from the middle of the area, began a volume at 00:55 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
10%
One or more EF2 to EF5 tornadoes
2%
Ten or more severe wind reports
80%
One or more gusts of 65 knots or more
60%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

31 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jun 15, 7:15 PM MDTSevere Thunderstorm WarningUNRLawrence, Meade45 min
Jun 15, 7:45 PM MDTSevere Thunderstorm WarningUNRCuster, Pennington60 min
Jun 15, 7:46 PM MDTSevere Thunderstorm WarningUNRBennett, Jackson, Oglala Lakota44 min
Jun 15, 7:55 PM MDTSevere Thunderstorm WarningUNRButte, Lawrence, Meade65 min
Jun 15, 7:56 PM MDTSevere Thunderstorm WarningUNRBennett49 min
Jun 15, 8:15 PM MDTSevere Thunderstorm WarningUNROglala Lakota60 min
Jun 15, 8:29 PM MDTSevere Thunderstorm WarningUNRBennett46 min
Jun 15, 8:38 PM MDTSevere Thunderstorm WarningUNRCuster, Meade, Pennington45 min
Jun 15, 9:07 PM MDTSevere Thunderstorm Warning Considerable damage threatUNRCuster, Haakon, Jackson, Meade, Oglala Lakota, Pennington53 min
Jun 15, 9:12 PM MDTSevere Thunderstorm WarningUNRFall River, Oglala Lakota48 min
Jun 15, 9:15 PM MDTSevere Thunderstorm WarningUNRBennett45 min
Jun 15, 9:19 PM MDTSevere Thunderstorm WarningUNRHaakon, Meade, Pennington41 min
Jun 15, 9:28 PM MDTSevere Thunderstorm WarningUNROglala Lakota, Pennington32 min
Jun 15, 9:54 PM MDTSevere Thunderstorm Warning Considerable damage threatUNRBennett, Jackson, Oglala Lakota, Pennington51 min
Jun 15, 9:56 PM MDTSevere Thunderstorm Warning Considerable damage threatUNRHaakon, Jackson, Meade, Pennington49 min
Jun 15, 10:40 PM MDTSevere Thunderstorm Warning Considerable damage threatUNRHaakon, Jackson, Mellette50 min
Jun 15, 10:42 PM MDTSevere Thunderstorm WarningUNRBennett, Jackson, Mellette, Todd48 min
Jun 15, 10:45 PM MDTSevere Thunderstorm WarningABRJones, Stanley45 min
Jun 15, 11:27 PM MDTSevere Thunderstorm WarningUNRHarding63 min
Jun 15, 11:28 PM MDTSevere Thunderstorm WarningUNRBennett, Haakon, Jackson, Mellette, Todd, Tripp62 min
Jun 16, 12:00 AM MDTSevere Thunderstorm WarningABRCorson, Dewey45 min
Jun 16, 12:12 AM MDTSevere Thunderstorm WarningUNRHarding, Perkins18 min
Jun 16, 12:13 AM MDTSevere Thunderstorm WarningABRCorson32 min
Jun 16, 12:26 AM MDTSevere Thunderstorm Warning Destructive damage threatUNRHarding, Perkins49 min
Jun 16, 12:47 AM MDTSevere Thunderstorm WarningABRCorson43 min
Jun 16, 12:58 AM MDTSevere Thunderstorm Warning Destructive damage threatABRCorson62 min
Jun 16, 1:06 AM MDTSevere Thunderstorm WarningABRCampbell39 min
Jun 16, 1:15 AM MDTSevere Thunderstorm Warning Considerable damage threatUNRHarding, Perkins60 min
Jun 16, 1:26 AM MDTSevere Thunderstorm Warning Considerable damage threatABRCorson, Dewey64 min
Jun 16, 2:01 AM MDTSevere Thunderstorm WarningABRCampbell, Corson, Potter, Walworth44 min
Jun 16, 2:16 AM MDTSevere Thunderstorm WarningABRCorson, Dewey44 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Rapid City, SD (KUNR), launched 00:00Z, 0.9 hours before the alert went out and 81 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-pSkew-T log-p diagram, Rapid City, SD at 00:00Z on 2025-06-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2203 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Rapid City, SD at 00:00Z on 2025-06-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
2203 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
2506 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
-56 m²/s²
Significant tornado parameter
0.0
Supercell composite
-3.8

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 15, 6:27 PM MDTMesoscale DiscussionSPCBennett, Butte, Custer, Dewey, Fall River, Haakon and 13 more93 min
Jun 16, 12:40 AM MDTMesoscale DiscussionSPCCampbell, Corson, Edmunds, McPherson, Perkins, Walworth2 hr
Jun 16, 12:49 PM MDTMesoscale DiscussionSPCAurora, Bon Homme, Charles Mix, Clay, Davison, Douglas and 8 more116 min
Jun 16, 3:46 PM MDTMesoscale DiscussionSPCClay, Union89 min
Jun 16, 4:52 PM MDTMesoscale DiscussionSPCButte, Custer, Lawrence113 min

Nearby

Severe Thunderstorm Watches in South Dakota, 2025Every severe thunderstorm watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.