Alert archive / Minnesota / Severe Thunderstorm Watches in 2016

Severe Thunderstorm Watch 248

June 12, 201627 counties in Minnesota; 6 counties in North Dakota; 8 counties in South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jun 12, 2016, 2:50 PM CDT for 27 counties in Minnesota; 6 counties in North Dakota; 8 counties in South Dakota. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Jun 12, 2016, 2:50 PM CDT (19:50 UTC)
Expired: Jun 12, 2016, 10:00 PM CDT
In force: 7 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 41 counties

Becker County, MN, Benton County, MN, Big Stone County, MN, Chippewa County, MN, Clay County, MN, Douglas County, MN, Grant County, MN, Hubbard County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Mahnomen County, MN, Meeker County, MN, Morrison County, MN, Norman County, MN, Otter Tail County, MN, Pope County, MN, Renville County, MN, Sherburne County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Traverse County, MN, Wadena County, MN, Wilkin County, MN, Wright County, MN, Yellow Medicine County, MN, Cass County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Steele County, ND, Traill County, ND, Clark County, SD, Codington County, SD, Day County, SD, Deuel County, SD, Grant County, SD, Hamlin County, SD, Marshall County, SD, Roberts County, SD

The radar

The Aberdeen radar (KABR), 143 km from the middle of the area, began a volume at 19:52 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: 20%
One or more EF2 to EF5 tornadoes: 5%
Ten or more severe wind reports: 50%
One or more gusts of 65 knots or more: 10%
Ten or more severe hail reports: 40%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 80%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 12, 3:09 PM CDT	Severe Thunderstorm Warning	ABR	Big Stone, Traverse	37 min
Jun 12, 3:11 PM CDT	Severe Thunderstorm Warning	MPX	Stevens	64 min
Jun 12, 3:19 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay, Otter Tail, Wilkin	39 min
Jun 12, 3:23 PM CDT	Severe Thunderstorm Warning	FGF	Grant, Otter Tail, Wilkin	67 min
Jun 12, 3:48 PM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope, Stevens	42 min
Jun 12, 4:29 PM CDT	Severe Thunderstorm Warning	FGF	Grant	26 min
Jun 12, 4:29 PM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope	61 min
Jun 12, 5:18 PM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope, Stearns, Todd	57 min
Jun 12, 5:48 PM CDT	Severe Thunderstorm Warning	MPX	Kandiyohi, Stearns	57 min
Jun 12, 5:59 PM CDT	Severe Thunderstorm Warning	FGF	Grant	47 min
Jun 12, 8:48 PM CDT	Severe Thunderstorm Warning	MPX	Redwood, Renville	28 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

Aberdeen, SD (KABR), launched 12:00Z, 7.8 hours before the alert went out and 172 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: 1002 J/kg
Mixed-layer CIN: -217 J/kg
Mixed-layer LCL: 1892 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 185 m²/s²
0-3 km storm-relative helicity: 209 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 12, 2:30 PM CDT	Mesoscale Discussion	SPC	Becker, Benton, Big Stone, Chippewa, Clay, Douglas and 16 more	90 min
Jun 12, 5:26 PM CDT	Mesoscale Discussion	SPC	Benton, Big Stone, Brown, Carver, Chippewa, Douglas and 17 more	2 hr
Jun 11, 8:36 PM CDT	Mesoscale Discussion	SPC	Adams, Billings, Bowman, Dunn, Golden Valley, Grant and 10 more	84 min
Jun 11, 11:04 PM CDT	Mesoscale Discussion	SPC	Adams, Benson, Billings, Bottineau, Bowman, Burke and 20 more	116 min
Jun 12, 1:41 PM CDT	Mesoscale Discussion	SPC	Aurora, Brule, Buffalo, Gregory, Lyman, Tripp	3 hr

Nearby

Severe Thunderstorm Watches in Minnesota, 2016 Severe Thunderstorm Watches in South Dakota, 2016 Severe Thunderstorm Watches in North Dakota, 2016 Every severe thunderstorm watch in 2016

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.