Alert archive / Iowa / Tornado Watches in 2005

Tornado Watch 858

November 12, 20054 states

The Storm Prediction Center issued this tornado watch at Nov 12, 2005, 1:44 PM CST for 4 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Nov 12, 2005, 1:44 PM CST (19:44 UTC)
Expired: Nov 12, 2005, 7:55 PM CST
In force: 6 hr
Issued by: the Storm Prediction Center

All 109 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Boone County, IA, Buena Vista County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cerro Gordo County, IA, Cherokee County, IA, Clarke County, IA, Clay County, IA, Crawford County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Dickinson County, IA, Emmet County, IA, Franklin County, IA, Fremont County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Harrison County, IA, Humboldt County, IA, Ida County, IA, Jasper County, IA, Kossuth County, IA, Lucas County, IA, Lyon County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Mills County, IA, Monona County, IA, Monroe County, IA, Montgomery County, IA, O'Brien County, IA, Osceola County, IA, Page County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Polk County, IA, Pottawattamie County, IA, Poweshiek County, IA, Ringgold County, IA, Sac County, IA, Shelby County, IA, Sioux County, IA, Story County, IA, Tama County, IA, Taylor County, IA, Union County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA, Webster County, IA, Winnebago County, IA, Woodbury County, IA, Worth County, IA, Wright County, IA, Blue Earth County, MN, Brown County, MN, Cottonwood County, MN, Faribault County, MN, Freeborn County, MN, Jackson County, MN, Le Sueur County, MN, Lincoln County, MN, Lyon County, MN, Martin County, MN, Murray County, MN, Nicollet County, MN, Nobles County, MN, Pipestone County, MN, Redwood County, MN, Rice County, MN, Rock County, MN, Steele County, MN, Waseca County, MN, Watonwan County, MN, Burt County, NE, Cass County, NE, Dakota County, NE, Dixon County, NE, Douglas County, NE, Nemaha County, NE, Otoe County, NE, Sarpy County, NE, Thurston County, NE, Washington County, NE, Brookings County, SD, Clay County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Turner County, SD, Union County, SD

The radar

The Sioux Falls radar (KFSD), 135 km from the middle of the area, began a volume at 19:45 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

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

Issued	Product	Office	Counties	Lasted
Nov 12, 2:17 PM CST	Severe Thunderstorm Warning	FSD	Lyon	28 min
Nov 12, 2:34 PM CST	Severe Thunderstorm Warning	OAX	Shelby	26 min
Nov 12, 2:39 PM CST	Severe Thunderstorm Warning	DMX	Cass	21 min
Nov 12, 2:56 PM CST	Severe Thunderstorm Warning	DMX	Crawford	34 min
Nov 12, 2:59 PM CST	Severe Thunderstorm Warning	FSD	Hanson, McCook	46 min
Nov 12, 3:01 PM CST	Severe Thunderstorm Warning	FSD	Lincoln, Union	29 min
Nov 12, 3:05 PM CST	Severe Thunderstorm Warning	DMX	Audubon, Guthrie	25 min
Nov 12, 3:15 PM CST	Severe Thunderstorm Warning	FSD	Hutchinson, Turner	45 min
Nov 12, 3:19 PM CST	Tornado Warning	DMX	Audubon, Guthrie	26 min
Nov 12, 3:22 PM CST	Severe Thunderstorm Warning	DMX	Adair	38 min
Nov 12, 3:23 PM CST	Severe Thunderstorm Warning	FSD	Plymouth	29 min
Nov 12, 3:43 PM CST	Tornado Warning	DMX	Greene	47 min
Nov 12, 3:45 PM CST	Severe Thunderstorm Warning	FSD	McCook, Minnehaha	45 min
Nov 12, 3:51 PM CST	Severe Thunderstorm Warning	DMX	Dallas, Guthrie	39 min
Nov 12, 3:52 PM CST	Severe Thunderstorm Warning	FSD	Lake	38 min
Nov 12, 3:58 PM CST	Tornado Warning	DMX	Dallas, Guthrie	32 min
Nov 12, 3:59 PM CST	Severe Thunderstorm Warning	FSD	Turner	31 min
Nov 12, 4:01 PM CST	Severe Thunderstorm Warning	FSD	Lyon, Sioux	29 min
Nov 12, 4:14 PM CST	Severe Thunderstorm Warning	FSD	Rock	31 min
Nov 12, 4:24 PM CST	Severe Thunderstorm Warning	DMX	Boone, Hamilton, Webster	51 min
Nov 12, 4:29 PM CST	Severe Thunderstorm Warning	FSD	Minnehaha	46 min
Nov 12, 4:30 PM CST	Tornado Warning	DMX	Boone, Hamilton, Webster	30 min
Nov 12, 4:30 PM CST	Tornado Warning	DMX	Boone, Dallas	30 min
Nov 12, 4:33 PM CST	Tornado Warning	FSD	O'Brien, Sioux	27 min
Nov 12, 4:54 PM CST	Severe Thunderstorm Warning	FSD	Pipestone	32 min
Nov 12, 4:55 PM CST	Tornado Warning	FSD	Clay	20 min
Nov 12, 4:56 PM CST	Tornado Warning	DMX	Story	34 min
Nov 12, 4:57 PM CST	Tornado Warning	DMX	Franklin, Hamilton, Hardin, Wright	48 min
Nov 12, 5:06 PM CST	Tornado Warning	DMX	Hamilton	24 min
Nov 12, 5:16 PM CST	Severe Thunderstorm Warning	FSD	Rock	44 min
Nov 12, 5:18 PM CST	Severe Thunderstorm Warning	DMX	Jasper, Polk	27 min
Nov 12, 5:23 PM CST	Tornado Warning	DMX	Hardin	22 min
Nov 12, 5:41 PM CST	Tornado Warning	DMX	Franklin, Hardin	34 min
Nov 12, 6:33 PM CST	Severe Thunderstorm Warning	DMX	Butler	27 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, 7.7 hours before the alert went out and 201 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1049 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 155 m²/s²
0-3 km storm-relative helicity: 136 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
Nov 12, 12:33 PM CST	Mesoscale Discussion	SPC	Adams, Audubon, Buena Vista, Carroll, Cass, Cherokee and 18 more	87 min
Nov 12, 3:35 PM CST	Mesoscale Discussion	SPC	Adair, Boone, Buena Vista, Calhoun, Carroll, Cherokee and 18 more	85 min
Nov 12, 4:40 PM CST	Mesoscale Discussion	SPC	Adair, Appanoose, Audubon, Boone, Buena Vista, Butler and 49 more	65 min
Nov 12, 5:24 PM CST	Mesoscale Discussion	SPC	Allamakee, Benton, Bremer, Buchanan, Cedar, Chickasaw and 18 more	66 min
Nov 12, 5:40 PM CST	Tornado Watch	SPC	Allamakee, Benton, Black Hawk, Bremer, Buchanan, Cedar and 14 more	4 hr

Nearby

Tornado Watches in Iowa, 2005 Tornado Watches in Minnesota, 2005 Tornado Watches in South Dakota, 2005 Every tornado watch in 2005

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.