Alert archive / South Dakota / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 397

June 4, 200410 counties in Nebraska; 5 counties in North Dakota; 18 counties in South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jun 4, 2004, 2:30 PM MDT for 10 counties in Nebraska; 5 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 4, 2004, 2:30 PM MDT (20:30 UTC)
Expired: Jun 4, 2004, 8:00 PM MDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 33 counties

Emmons County, ND, Grant County, ND, Logan County, ND, Morton County, ND, Sioux County, ND, Arthur County, NE, Box Butte County, NE, Cherry County, NE, Dawes County, NE, Garden County, NE, Grant County, NE, Hooker County, NE, McPherson County, NE, Morrill County, NE, Sheridan County, NE, Bennett County, SD, Campbell County, SD, Corson County, SD, Dewey County, SD, Haakon County, SD, Jackson County, SD, Jones County, SD, Meade County, SD, Mellette County, SD, Oglala Lakota County, SD, Pennington County, SD, Perkins County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Todd County, SD, Walworth County, SD, Ziebach County, SD

The radar

The Rapid City radar (KUDX), 93 km from the middle of the area, began a volume at 20:29 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

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

Issued	Product	Office	Counties	Lasted
Jun 4, 4:02 PM MDT	Severe Thunderstorm Warning	BIS	Morton	43 min
Jun 4, 4:06 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte	54 min
Jun 4, 4:22 PM MDT	Severe Thunderstorm Warning	UNR	Ziebach	53 min
Jun 4, 5:14 PM MDT	Severe Thunderstorm Warning	ABR	Corson	61 min
Jun 4, 5:27 PM MDT	Severe Thunderstorm Warning	UNR	Jackson	48 min
Jun 4, 6:42 PM MDT	Severe Thunderstorm Warning	UNR	Pennington	63 min
Jun 4, 7:38 PM MDT	Severe Thunderstorm Warning	LBF	McPherson	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

Rapid City, SD (KUNR), launched 12:00Z, 8.5 hours before the alert went out and 91 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: 11 J/kg
Mixed-layer CIN: -251 J/kg
Mixed-layer LCL: 2368 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: -49 m²/s²
0-3 km storm-relative helicity: -53 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 4, 1:29 PM MDT	Mesoscale Discussion	SPC	Banner, Box Butte, Cheyenne, Dawes, Deuel, Garden and 5 more	2 hr
Jun 4, 2:10 PM MDT	Severe Thunderstorm Watch	SPC	Chase, Cheyenne, Deuel, Dundy, Hayes, Hitchcock and 2 more	6 hr
Jun 4, 5:04 PM MDT	Mesoscale Discussion	SPC	Arthur, Chase, Cherry, Deuel, Dundy, Garden and 8 more	116 min
Jun 4, 12:46 PM MDT	Mesoscale Discussion	SPC	Adams, Burleigh, Dunn, Emmons, Grant, Hettinger and 10 more	119 min

Nearby

Severe Thunderstorm Watches in South Dakota, 2004 Severe Thunderstorm Watches in Nebraska, 2004 Severe Thunderstorm Watches in North Dakota, 2004 Every severe thunderstorm watch in 2004

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.