Alert archive / South Dakota / Tornado Watches in 2022

Tornado Watch 350

June 12, 2022Carter County, Powder River County, Montana; 10 counties in South Dakota; 5 counties in Wyoming

The Storm Prediction Center issued this tornado watch at Jun 12, 2022, 3:06 PM MDT for Carter County, Powder River County, Montana; 10 counties in South Dakota; 5 counties in Wyoming. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Jun 12, 2022, 3:06 PM MDT (21:06 UTC)
Expired: Jun 12, 2022, 10:00 PM MDT
In force: 7 hr
Issued by: the Storm Prediction Center
Largest hail expected: 3 in
Strongest gust expected: 65 kt

Counties Carter County, MT, Powder River County, MT, Butte County, SD, Custer County, SD, Haakon County, SD, Harding County, SD, Jackson County, SD, Lawrence County, SD, Meade County, SD, Pennington County, SD, Perkins County, SD, Ziebach County, SD, Campbell County, WY, Crook County, WY, Johnson County, WY, Sheridan County, WY, Weston County, WY

The radar

The Rapid City radar (KUDX), 181 km from the middle of the area, began a volume at 21:07 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: 40%
One or more EF2 to EF5 tornadoes: 20%
Ten or more severe wind reports: 50%
One or more gusts of 65 knots or more: 50%
Ten or more severe hail reports: 70%
One or more hailstones of 2 inches or more: 50%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 12, 3:13 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	45 min
Jun 12, 3:15 PM MDT	Severe Thunderstorm Warning	BYZ	Sheridan	44 min
Jun 12, 3:42 PM MDT	Severe Thunderstorm Warning Destructive damage threat	UNR	Campbell, Crook	63 min
Jun 12, 4:14 PM MDT	Tornado Warning	UNR	Butte, Lawrence	27 min
Jun 12, 4:36 PM MDT	Severe Thunderstorm Warning Considerable damage threat	UNR	Campbell, Crook	24 min
Jun 12, 4:41 PM MDT	Severe Thunderstorm Warning Considerable damage threat	UNR	Butte, Lawrence, Meade	64 min
Jun 12, 4:58 PM MDT	Severe Thunderstorm Warning Considerable damage threat	UNR	Crook	47 min
Jun 12, 5:10 PM MDT	Severe Thunderstorm Warning Destructive damage threat	UNR	Butte, Lawrence, Meade	65 min
Jun 12, 5:47 PM MDT	Severe Thunderstorm Warning Considerable damage threat	UNR	Lawrence	43 min
Jun 12, 5:50 PM MDT	Severe Thunderstorm Warning	UNR	Lawrence, Meade	25 min
Jun 12, 6:11 PM MDT	Severe Thunderstorm Warning Destructive damage threat	UNR	Butte, Meade, Pennington	64 min
Jun 12, 6:23 PM MDT	Severe Thunderstorm Warning Considerable damage threat	UNR	Lawrence, Meade	52 min
Jun 12, 6:35 PM MDT	Severe Thunderstorm Warning Considerable damage threat	UNR	Meade, Pennington	40 min
Jun 12, 6:58 PM MDT	Severe Thunderstorm Warning Considerable damage threat	UNR	Meade, Pennington	17 min
Jun 12, 7:14 PM MDT	Severe Thunderstorm Warning Considerable damage threat	UNR	Haakon, Jackson, Meade, Pennington	61 min
Jun 12, 7:17 PM MDT	Severe Thunderstorm Warning	UNR	Lawrence, Meade	58 min
Jun 12, 7:52 PM MDT	Tornado Warning	UNR	Haakon, Jackson	38 min
Jun 12, 8:11 PM MDT	Severe Thunderstorm Warning Considerable damage threat	UNR	Haakon, Jackson, Mellette, Pennington	64 min
Jun 12, 8:14 PM MDT	Severe Thunderstorm Warning	UNR	Meade, Pennington	46 min
Jun 12, 8:28 PM MDT	Tornado Warning	UNR	Haakon	47 min
Jun 12, 8:37 PM MDT	Tornado Warning	UNR	Haakon, Jackson, Mellette	38 min
Jun 12, 9:15 PM MDT	Severe Thunderstorm Warning Considerable damage threat	UNR	Jackson, Mellette	60 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 12:00Z, 9.1 hours before the alert went out and 180 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: 13 J/kg
Mixed-layer CIN: -291 J/kg
Mixed-layer LCL: 1370 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: -53 m²/s²
0-3 km storm-relative helicity: -33 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 11, 8:04 PM MDT	Mesoscale Discussion	SPC	Carter	86 min
Jun 12, 2:24 PM MDT	Mesoscale Discussion	SPC	Carter, Powder River	96 min
Jun 11, 9:50 PM MDT	Mesoscale Discussion	SPC	Bennett, Butte, Custer, Haakon, Jackson, Jones and 8 more	85 min
Jun 11, 10:17 PM MDT	Severe Thunderstorm Watch	SPC	Bennett, Haakon, Hughes, Jackson, Jones, Lyman and 4 more	5 hr
Jun 11, 11:44 PM MDT	Mesoscale Discussion	SPC	Aurora, Bennett, Bon Homme, Brule, Charles Mix, Clay and 16 more	2 hr
Jun 12, 5:25 PM MDT	Mesoscale Discussion	SPC	Lawrence, Meade, Pennington	95 min
Jun 12, 2:27 PM MDT	Mesoscale Discussion	SPC	Goshen	2 hr

Nearby

Tornado Watches in South Dakota, 2022 Tornado Watches in Wyoming, 2022 Tornado Watches in Montana, 2022 Every tornado watch in 2022

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.