Alert archive / North Dakota / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 589

August 11, 2002Kittson County, Minnesota; 29 counties in North Dakota; 23 counties in South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Aug 11, 2002, 1:55 PM CDT for Kittson County, Minnesota; 29 counties in North Dakota; 23 counties in South Dakota. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Aug 11, 2002, 1:55 PM CDT (18:55 UTC)
Expired: Aug 11, 2002, 7:00 PM CDT
In force: 5 hr
Issued by: the Storm Prediction Center

All 53 counties

Kittson County, MN, Barnes County, ND, Benson County, ND, Burleigh County, ND, Cass County, ND, Cavalier County, ND, Dickey County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Grand Forks County, ND, Griggs County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Nelson County, ND, Pembina County, ND, Pierce County, ND, Ramsey County, ND, Ransom County, ND, Rolette County, ND, Sargent County, ND, Sheridan County, ND, Steele County, ND, Stutsman County, ND, Towner County, ND, Traill County, ND, Walsh County, ND, Wells County, ND, Beadle County, SD, Brown County, SD, Buffalo County, SD, Campbell County, SD, Clark County, SD, Day County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jerauld County, SD, Jones County, SD, Lyman County, SD, Marshall County, SD, McPherson County, SD, Potter County, SD, Sanborn County, SD, Spink County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD

The radar

The Aberdeen radar (KABR), 88 km from the middle of the area, began a volume at 18:59 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.

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Aug 11, 3:02 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Sioux	58 min
Aug 11, 3:17 PM CDT	Severe Thunderstorm Warning	ABR	Dewey	43 min
Aug 11, 3:41 PM CDT	Severe Thunderstorm Warning	BIS	Foster, Stutsman	64 min
Aug 11, 3:53 PM CDT	Tornado Warning	BIS	Stutsman	52 min
Aug 11, 4:01 PM CDT	Severe Thunderstorm Warning	ABR	Dewey	59 min
Aug 11, 4:02 PM CDT	Severe Thunderstorm Warning	BIS	Emmons, Logan	58 min
Aug 11, 4:50 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	55 min
Aug 11, 4:54 PM CDT	Severe Thunderstorm Warning	FGF	Eddy	51 min
Aug 11, 5:01 PM CDT	Severe Thunderstorm Warning	ABR	Dewey	44 min
Aug 11, 5:08 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Nelson, Ramsey	37 min
Aug 11, 5:22 PM CDT	Severe Thunderstorm Warning	ABR	Stanley, Sully	53 min
Aug 11, 5:44 PM CDT	Severe Thunderstorm Warning	FGF	Barnes	61 min
Aug 11, 5:47 PM CDT	Severe Thunderstorm Warning	FGF	Nelson, Ramsey, Walsh	43 min
Aug 11, 5:48 PM CDT	Severe Thunderstorm Warning	ABR	Hughes	57 min
Aug 11, 5:54 PM CDT	Severe Thunderstorm Warning	FGF	Griggs, Steele	51 min
Aug 11, 6:14 PM CDT	Severe Thunderstorm Warning	ABR	Sully	46 min
Aug 11, 6:29 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Traill	56 min
Aug 11, 6:32 PM CDT	Tornado Warning	ABR	Hughes	28 min
Aug 11, 6:54 PM CDT	Tornado Warning	ABR	Hyde	36 min

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 6.9 hours before the alert went out and 133 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: 61 J/kg
Mixed-layer CIN: -306 J/kg
Mixed-layer LCL: 2395 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 130 m²/s²
0-3 km storm-relative helicity: 162 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
Aug 11, 6:45 PM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Becker, Beltrami, Cass, Clay, Clearwater and 16 more	5 hr
Aug 11, 3:35 PM CDT	Severe Thunderstorm Watch	SPC	Bennett, Jackson, Mellette, Todd, Tripp	5 hr

Nearby

Severe Thunderstorm Watches in North Dakota, 2002 Severe Thunderstorm Watches in South Dakota, 2002 Severe Thunderstorm Watches in Minnesota, 2002 Every severe thunderstorm watch in 2002

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.