Alert archive / North Dakota / Severe Thunderstorm Watches in 2013

Severe Thunderstorm Watch 331

June 20, 201311 counties in Minnesota; 26 counties in North Dakota; 21 counties in South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jun 20, 2013, 3:26 PM CDT for 11 counties in Minnesota; 26 counties in North Dakota; 21 counties in South Dakota. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued: Jun 20, 2013, 3:26 PM CDT (20:26 UTC)
Expired: Jun 21, 2013, 12:00 AM CDT
In force: 9 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 58 counties

Becker County, MN, Big Stone County, MN, Clay County, MN, Grant County, MN, Hubbard County, MN, Mahnomen County, MN, Norman County, MN, Otter Tail County, MN, Traverse County, MN, Wadena County, MN, Wilkin County, MN, Barnes County, ND, Burleigh County, ND, Cass County, ND, Dickey County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Grant County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Oliver County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Sheridan County, ND, Sioux County, ND, Steele County, ND, Stutsman County, ND, Traill County, ND, Wells County, ND, Brown County, SD, Campbell County, SD, Clark County, SD, Codington County, SD, Corson County, SD, Day County, SD, Deuel County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Hamlin County, SD, Hand County, SD, Hyde County, SD, Marshall County, SD, McPherson County, SD, Potter County, SD, Roberts County, SD, Spink County, SD, Sully County, SD, Walworth County, SD

The radar

The Bismarck radar (KBIS), 119 km from the middle of the area, began a volume at 20:27 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: 20%
Ten or more severe hail reports: 60%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 90%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 20, 3:51 PM CDT	Severe Thunderstorm Warning	FGF	Griggs	39 min
Jun 20, 4:30 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Logan	60 min
Jun 20, 5:00 PM CDT	Flash Flood Warning	BIS	Emmons	6 hr
Jun 20, 5:16 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Steele, Traill	44 min
Jun 20, 5:30 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Kidder	60 min
Jun 20, 5:31 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Logan	44 min
Jun 20, 5:54 PM CDT	Severe Thunderstorm Warning	FGF	Barnes	51 min
Jun 20, 5:58 PM CDT	Tornado Warning	FGF	Barnes	47 min
Jun 20, 6:05 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	40 min
Jun 20, 6:17 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Logan	43 min
Jun 20, 6:17 PM CDT	Severe Thunderstorm Warning	ABR	Dewey	58 min
Jun 20, 6:29 PM CDT	Severe Thunderstorm Warning	FGF	Clay, Norman, Polk	46 min
Jun 20, 6:42 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Griggs, Steele	48 min
Jun 20, 6:49 PM CDT	Severe Thunderstorm Warning	BIS	Emmons	41 min
Jun 20, 7:06 PM CDT	Severe Thunderstorm Warning	ABR	Dewey	54 min
Jun 20, 7:18 PM CDT	Severe Thunderstorm Warning	FGF	Clay, Norman	57 min
Jun 20, 7:22 PM CDT	Flash Flood Warning	BIS	Emmons, Logan	6 hr
Jun 20, 7:25 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Steele	50 min
Jun 20, 7:31 PM CDT	Severe Thunderstorm Warning	BIS	Emmons	59 min
Jun 20, 7:47 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass	58 min
Jun 20, 8:09 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay	66 min
Jun 20, 8:11 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Logan, McIntosh	64 min
Jun 20, 8:12 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass	48 min
Jun 20, 8:32 PM CDT	Severe Thunderstorm Warning	ABR	Campbell	43 min
Jun 20, 8:35 PM CDT	Severe Thunderstorm Warning	FGF	Otter Tail	55 min
Jun 20, 8:42 PM CDT	Flash Flood Warning	FGF	Barnes	15 hr
Jun 20, 8:52 PM CDT	Severe Thunderstorm Warning	BIS	LaMoure, Logan	53 min
Jun 20, 9:04 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay	56 min
Jun 20, 9:14 PM CDT	Severe Thunderstorm Warning	FGF	Becker	61 min
Jun 20, 9:15 PM CDT	Severe Thunderstorm Warning	BIS	McIntosh	60 min
Jun 20, 9:20 PM CDT	Severe Thunderstorm Warning	FGF	Cass	40 min
Jun 20, 9:27 PM CDT	Severe Thunderstorm Warning	FGF	Otter Tail	63 min
Jun 20, 9:35 PM CDT	Severe Thunderstorm Warning	FGF	Clay	55 min
Jun 20, 9:44 PM CDT	Severe Thunderstorm Warning	BIS	Dickey, LaMoure, Stutsman	61 min
Jun 20, 9:44 PM CDT	Severe Thunderstorm Warning	FGF	Cass	46 min
Jun 20, 9:46 PM CDT	Severe Thunderstorm Warning	FGF	Clay	59 min
Jun 20, 10:05 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay, Otter Tail, Wilkin	55 min
Jun 20, 10:17 PM CDT	Severe Thunderstorm Warning	FGF	Ransom, Richland, Sargent	58 min
Jun 20, 10:44 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Ransom, Sargent	61 min
Jun 20, 11:04 PM CDT	Severe Thunderstorm Warning	FGF	Clay, Otter Tail, Wilkin	41 min
Jun 20, 11:31 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Ransom, Richland	59 min
Jun 20, 11:59 PM CDT	Flash Flood Warning	ABR	Traverse	6 hr

Discussions around it

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

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 8.4 hours before the alert went out and 115 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: 921 J/kg
Mixed-layer CIN: -317 J/kg
Mixed-layer LCL: 830 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 246 m²/s²
0-3 km storm-relative helicity: 414 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 19, 11:32 PM CDT	Mesoscale Discussion	SPC	Big Stone, Traverse, Wilkin	88 min
Jun 20, 6:55 AM CDT	Mesoscale Discussion	SPC	Big Stone, Chippewa, Lac qui Parle, Lincoln, Lyon, Pope and 4 more	2 hr
Jun 20, 5:20 PM CDT	Mesoscale Discussion	SPC	Aitkin, Becker, Benton, Big Stone, Cass, Chippewa and 25 more	85 min
Jun 19, 11:49 PM CDT	Mesoscale Discussion	SPC	Golden Valley	86 min
Jun 20, 1:57 AM CDT	Mesoscale Discussion	SPC	Burke, Divide, McKenzie, Mountrail, Williams	93 min
Jun 20, 2:50 PM CDT	Mesoscale Discussion	SPC	Burleigh, Dickey, Emmons, Kidder, LaMoure, Logan and 2 more	55 min

Nearby

Severe Thunderstorm Watches in North Dakota, 2013 Severe Thunderstorm Watches in South Dakota, 2013 Severe Thunderstorm Watches in Minnesota, 2013 Every severe thunderstorm watch in 2013

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.