Alert archive / North Dakota / Severe Thunderstorm Watches in 2018

Severe Thunderstorm Watch 155

June 5, 201823 counties in North Dakota; 18 counties in South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jun 5, 2018, 9:07 PM CDT for 23 counties in North Dakota; 18 counties in South Dakota. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jun 5, 2018, 9:07 PM CDT (02:07 UTC)
Expired: Jun 6, 2018, 3:00 AM CDT
In force: 6 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 41 counties

Barnes County, ND, Burleigh County, ND, Cass County, ND, Dickey County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Grand Forks County, ND, Grant County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Morton County, ND, Nelson 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, Day County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Haakon County, SD, Marshall County, SD, McPherson County, SD, Perkins County, SD, Potter County, SD, Roberts County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD, Ziebach County, SD

The radar

The Bismarck radar (KBIS), 93 km from the middle of the area, began a volume at 02:07 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: 10%
One or more EF2 to EF5 tornadoes: 2%
Ten or more severe wind reports: 30%
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: 30%
Six or more combined severe hail and wind reports: 60%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 5, 9:16 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	59 min
Jun 5, 9:18 PM CDT	Severe Thunderstorm Warning	UNR	Perkins	27 min
Jun 5, 9:31 PM CDT	Severe Thunderstorm Warning	UNR	Perkins, Ziebach	59 min
Jun 5, 9:38 PM CDT	Severe Thunderstorm Warning	ABR	Corson	37 min
Jun 5, 9:52 PM CDT	Severe Thunderstorm Warning	UNR	Meade, Perkins, Ziebach	38 min
Jun 5, 10:04 PM CDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	41 min
Jun 5, 10:11 PM CDT	Severe Thunderstorm Warning	ABR	Dewey	49 min
Jun 5, 10:47 PM CDT	Severe Thunderstorm Warning	FGF	Barnes	58 min
Jun 5, 10:53 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	37 min
Jun 5, 10:54 PM CDT	Severe Thunderstorm Warning	ABR	Dewey, Potter, Walworth	51 min
Jun 5, 10:59 PM CDT	Severe Thunderstorm Warning	BIS	Dickey, LaMoure, Logan, McIntosh	48 min
Jun 5, 11:10 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Griggs, Steele	35 min
Jun 5, 11:21 PM CDT	Severe Thunderstorm Warning	BIS	Dickey, LaMoure	37 min
Jun 5, 11:21 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, Corson, Dewey, Walworth	39 min
Jun 5, 11:22 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Grand Forks, Griggs, Steele, Traill	38 min
Jun 5, 11:30 PM CDT	Severe Thunderstorm Warning	ABR	Campbell, Dewey, Edmunds, Faulk, McPherson, Potter and 1 more	45 min
Jun 5, 11:40 PM CDT	Severe Thunderstorm Warning	FGF	Barnes, Cass, Ransom, Richland	65 min
Jun 5, 11:56 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Grand Forks, Steele, Traill	64 min
Jun 5, 11:56 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk, Potter	49 min
Jun 6, 12:21 AM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland	39 min
Jun 6, 12:21 AM CDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds, Faulk, McPherson, Spink	39 min
Jun 6, 1:01 AM CDT	Severe Thunderstorm Warning	ABR	Brown, Edmunds, McPherson	12 min
Jun 6, 1:24 AM CDT	Severe Thunderstorm Warning	ABR	Day, Grant, Marshall, Roberts	51 min
Jun 6, 1:49 AM CDT	Severe Thunderstorm Warning	ABR	Grant, Roberts	41 min
Jun 6, 1:53 AM CDT	Severe Thunderstorm Warning	ABR	Codington, Day, Deuel, Grant, Hamlin, Roberts	52 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, 2.1 hours before the alert went out and 90 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: 1433 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 2088 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 196 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.9

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 5, 11:26 PM CDT	Mesoscale Discussion	SPC	Barnes, Cass, Dickey, Emmons, Foster, Grand Forks and 9 more	94 min
Jun 6, 2:48 AM CDT	Mesoscale Discussion	SPC	Brookings, Codington, Deuel, Grant, Hamlin, Kingsbury and 4 more	87 min

Nearby

Severe Thunderstorm Watches in North Dakota, 2018 Severe Thunderstorm Watches in South Dakota, 2018 Every severe thunderstorm watch in 2018

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.