Alert archive / Iowa / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 411

June 8, 20044 states

The Storm Prediction Center issued this severe thunderstorm watch at Jun 8, 2004, 5:00 PM CDT for 4 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jun 8, 2004, 5:00 PM CDT (22:00 UTC)
Expired: Jun 8, 2004, 11:00 PM CDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 48 counties

Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Cerro Gordo County, IA, Cherokee County, IA, Clay County, IA, Crawford County, IA, Emmet County, IA, Franklin County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Harrison County, IA, Humboldt County, IA, Ida County, IA, Kossuth County, IA, Monona County, IA, O'Brien County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Sac County, IA, Webster County, IA, Winnebago County, IA, Woodbury County, IA, Worth County, IA, Wright County, IA, Freeborn County, MN, Antelope County, NE, Boone County, NE, Burt County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE, Union County, SD

The radar

The Omaha radar (KOAX), 123 km from the middle of the area, began a volume at 22:01 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

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

Issued	Product	Office	Counties	Lasted
Jun 8, 5:24 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Plymouth	51 min
Jun 8, 5:27 PM CDT	Severe Thunderstorm Warning	FSD	Woodbury	33 min
Jun 8, 5:48 PM CDT	Severe Thunderstorm Warning	FSD	Ida	27 min
Jun 8, 6:01 PM CDT	Severe Thunderstorm Warning	FSD	O'Brien	44 min
Jun 8, 6:12 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista, Cherokee	48 min
Jun 8, 6:26 PM CDT	Severe Thunderstorm Warning	DMX	Palo Alto	49 min
Jun 8, 7:12 PM CDT	Severe Thunderstorm Warning	FSD	Clay	33 min
Jun 8, 7:52 PM CDT	Severe Thunderstorm Warning	DMX	Pocahontas	38 min
Jun 8, 8:07 PM CDT	Severe Thunderstorm Warning	DMX	Winnebago	38 min
Jun 8, 8:13 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn	62 min
Jun 8, 8:21 PM CDT	Severe Thunderstorm Warning	DMX	Worth	39 min
Jun 8, 8:47 PM CDT	Flash Flood Warning	DMX	Winnebago	16 hr
Jun 8, 8:57 PM CDT	Flash Flood Warning	DMX	Worth	16 hr
Jun 8, 9:03 PM CDT	Severe Thunderstorm Warning	DMX	Worth	42 min
Jun 8, 9:26 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo	49 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

Omaha, NE (KOAX), launched 12:00Z, 10.0 hours before the alert went out and 123 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: 1844 J/kg
Mixed-layer CIN: -183 J/kg
Mixed-layer LCL: 813 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 170 m²/s²
0-3 km storm-relative helicity: 253 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 8, 3:29 PM CDT	Mesoscale Discussion	SPC	Allamakee, Audubon, Black Hawk, Boone, Bremer, Buchanan and 46 more	2 hr
Jun 8, 6:44 PM CDT	Mesoscale Discussion	SPC	Boone, Buena Vista, Butler, Calhoun, Carroll, Cerro Gordo and 16 more	2 hr
Jun 7, 7:08 PM CDT	Mesoscale Discussion	SPC	Aitkin, Anoka, Benton, Carlton, Carver, Chisago and 14 more	2 hr
Jun 7, 9:46 PM CDT	Mesoscale Discussion	SPC	Chippewa, Kandiyohi, Lac qui Parle, Lincoln, Lyon, McLeod and 8 more	119 min
Jun 7, 10:25 PM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Benton, Big Stone, Carlton, Chippewa, Cook and 21 more	6 hr
Jun 8, 12:42 AM CDT	Mesoscale Discussion	SPC	Anoka, Brown, Carver, Chisago, Dakota, Dodge and 17 more	63 min
Jun 8, 12:55 AM CDT	Severe Thunderstorm Watch	SPC	Anoka, Carver, Chisago, Dakota, Goodhue, Hennepin and 10 more	3 hr
Jun 8, 2:08 AM CDT	Mesoscale Discussion	SPC	Aitkin, Benton, Carlton, Chippewa, Cook, Crow Wing and 14 more	67 min
Jun 8, 3:02 AM CDT	Mesoscale Discussion	SPC	Aitkin, Anoka, Benton, Carlton, Carver, Chisago and 23 more	58 min
Jun 8, 2:24 PM CDT	Mesoscale Discussion	SPC	Arthur, Blaine, Boone, Buffalo, Chase, Custer and 21 more	2 hr
Jun 8, 3:00 PM CDT	Tornado Watch	SPC	Adams, Arthur, Buffalo, Chase, Custer, Dawson and 22 more	6 hr
Jun 8, 5:24 PM CDT	Mesoscale Discussion	SPC	Buffalo, Chase, Custer, Dawson, Frontier, Furnas and 10 more	2 hr
Jun 8, 6:02 PM CDT	Mesoscale Discussion	SPC	Chase, Dundy, Perkins	118 min

Nearby

Severe Thunderstorm Watches in Iowa, 2004 Severe Thunderstorm Watches in Nebraska, 2004 Severe Thunderstorm Watches in Minnesota, 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.