Alert archive / North Dakota / Severe Thunderstorm Watches in 2012

Severe Thunderstorm Watch 388

June 13, 20124 counties in Minnesota; 19 counties in North Dakota; 8 counties in South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jun 13, 2012, 10:53 PM CDT for 4 counties in Minnesota; 19 counties in North Dakota; 8 counties in South Dakota. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Jun 13, 2012, 10:53 PM CDT (03:53 UTC)
Expired: Jun 14, 2012, 4:00 AM CDT
In force: 5 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1.5 in
Strongest gust expected: 60 kt

All 31 counties

Clay County, MN, Norman County, MN, Traverse County, MN, Wilkin County, MN, Barnes County, ND, Burleigh County, ND, Cass County, ND, Dickey County, ND, Emmons County, ND, Foster County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Morton County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Sioux County, ND, Steele County, ND, Stutsman County, ND, Traill County, ND, Brown County, SD, Campbell County, SD, Corson County, SD, Edmunds County, SD, Marshall County, SD, McPherson County, SD, Roberts County, SD, Walworth County, SD

The radar

The Bismarck radar (KBIS), 120 km from the middle of the area, began a volume at 03:55 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: 5%
Ten or more severe wind reports: 50%
One or more gusts of 65 knots or more: 20%
Ten or more severe hail reports: 30%
One or more hailstones of 2 inches or more: 10%
Six or more combined severe hail and wind reports: 70%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 13, 11:19 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh	41 min
Jun 14, 2:34 AM CDT	Severe Thunderstorm Warning	ABR	Brown	26 min
Jun 14, 2:44 AM CDT	Severe Thunderstorm Warning	FGF	Richland, Sargent	46 min
Jun 14, 2:50 AM CDT	Severe Thunderstorm Warning	ABR	Brown, McPherson	40 min
Jun 14, 2:59 AM CDT	Severe Thunderstorm Warning	ABR	Brown, Marshall	46 min
Jun 14, 3:00 AM CDT	Severe Thunderstorm Warning	ABR	Marshall, Roberts	30 min
Jun 14, 3:30 AM CDT	Severe Thunderstorm Warning	ABR	Marshall, Roberts	30 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

Bismarck Municip, ND (KBIS), launched 00:00Z, 3.9 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: 220 J/kg
Mixed-layer CIN: -239 J/kg
Mixed-layer LCL: 1942 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 171 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 14, 3:01 AM CDT	Mesoscale Discussion	SPC	Big Stone, Douglas, Grant, Otter Tail, Pope, Stevens and 2 more	89 min
Jun 14, 7:37 AM CDT	Mesoscale Discussion	SPC	Anoka, Benton, Carver, Chisago, Dakota, Hennepin and 9 more	113 min
Jun 14, 1:44 PM CDT	Mesoscale Discussion	SPC	Blue Earth, Brown, Chippewa, Cottonwood, Faribault, Jackson and 19 more	2 hr
Jun 14, 2:31 PM CDT	Mesoscale Discussion	SPC	Clay, Marshall, Norman, Pennington, Polk, Red Lake and 1 more	89 min
Jun 14, 2:45 PM CDT	Severe Thunderstorm Watch	SPC	Blue Earth, Brown, Carver, Cottonwood, Dakota, Dodge and 22 more	7 hr
Jun 13, 9:34 PM CDT	Mesoscale Discussion	SPC	Adams, Barnes, Cass, Dickey, Emmons, Grant and 10 more	86 min

Nearby

Severe Thunderstorm Watches in North Dakota, 2012 Severe Thunderstorm Watches in South Dakota, 2012 Severe Thunderstorm Watches in Minnesota, 2012 Every severe thunderstorm watch in 2012

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.