Alert archive / Iowa / Tornado Watches in 2008

Tornado Watch 509

June 11, 20084 states

The Storm Prediction Center issued this tornado watch at Jun 11, 2008, 2:52 PM CDT for 4 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Jun 11, 2008, 2:52 PM CDT (19:52 UTC)
Expired: Jun 11, 2008, 10:00 PM CDT
In force: 7 hr
Issued by: the Storm Prediction Center

All 82 counties

Adair County, IA, Adams County, IA, Audubon County, IA, Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cherokee County, IA, Clay County, IA, Crawford County, IA, Dickinson County, IA, Emmet County, IA, Fremont County, IA, Greene County, IA, Guthrie County, IA, Hancock County, IA, Harrison County, IA, Humboldt County, IA, Ida County, IA, Kossuth County, IA, Lyon County, IA, Mills County, IA, Monona 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, Pottawattamie County, IA, Sac County, IA, Shelby County, IA, Sioux County, IA, Taylor County, IA, Webster County, IA, Winnebago County, IA, Woodbury County, IA, Blue Earth County, MN, Brown County, MN, Cottonwood County, MN, Faribault County, MN, Jackson County, MN, Lincoln County, MN, Lyon County, MN, Martin County, MN, McLeod County, MN, Murray County, MN, Nicollet County, MN, Nobles County, MN, Pipestone County, MN, Redwood County, MN, Renville County, MN, Rock County, MN, Sibley County, MN, Watonwan County, MN, Atchison County, MO, Holt County, MO, Nodaway County, MO, Burt County, NE, Butler County, NE, Cass County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Thurston County, NE, Washington County, NE

The radar

The Sioux Falls radar (KFSD), 134 km from the middle of the area, began a volume at 19:52 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

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

Issued	Product	Office	Counties	Lasted
Jun 11, 3:58 PM CDT	Tornado Warning	FSD	Plymouth	32 min
Jun 11, 4:26 PM CDT	Severe Thunderstorm Warning	OAX	Cuming, Thurston	27 min
Jun 11, 4:32 PM CDT	Severe Thunderstorm Warning	OAX	Saunders	43 min
Jun 11, 4:57 PM CDT	Flash Flood Warning	FSD	Cherokee, O'Brien, Osceola	2 hr
Jun 11, 4:57 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, O'Brien, Plymouth, Sioux	33 min
Jun 11, 5:00 PM CDT	Severe Thunderstorm Warning	FSD	Plymouth, Woodbury	45 min
Jun 11, 5:02 PM CDT	Severe Thunderstorm Warning	OAX	Burt, Cuming	28 min
Jun 11, 5:10 PM CDT	Tornado Warning	FSD	Lyon, Osceola, Sioux	35 min
Jun 11, 5:22 PM CDT	Tornado Warning	FSD	Cherokee, O'Brien, Osceola, Plymouth, Sioux	23 min
Jun 11, 5:25 PM CDT	Severe Thunderstorm Warning	OAX	Monona	50 min
Jun 11, 5:27 PM CDT	Tornado Warning	FSD	Cherokee, Plymouth, Woodbury	48 min
Jun 11, 5:30 PM CDT	Flash Flood Warning	FSD	Cherokee, Plymouth, Woodbury	68 min
Jun 11, 5:36 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Dodge, Douglas, Lancaster, Saunders, Seward and 1 more	54 min
Jun 11, 5:42 PM CDT	Tornado Warning	FSD	Osceola	48 min
Jun 11, 5:46 PM CDT	Tornado Warning	FSD	Cherokee, O'Brien	44 min
Jun 11, 5:49 PM CDT	Severe Thunderstorm Warning	OAX	Burt, Dodge, Washington	26 min
Jun 11, 5:56 PM CDT	Tornado Warning	FSD	Cottonwood, Murray	49 min
Jun 11, 5:56 PM CDT	Tornado Warning	OAX	Saunders	49 min
Jun 11, 6:03 PM CDT	Flash Flood Warning	OAX	Saunders	3 hr
Jun 11, 6:06 PM CDT	Tornado Warning	MPX	Redwood	39 min
Jun 11, 6:08 PM CDT	Severe Thunderstorm Warning	OAX	Monona	37 min
Jun 11, 6:09 PM CDT	Tornado Warning	FSD	Lyon, Murray	36 min
Jun 11, 6:13 PM CDT	Flash Flood Warning	OAX	Monona	3 hr
Jun 11, 6:13 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Monona	47 min
Jun 11, 6:16 PM CDT	Tornado Warning	FSD	Cherokee, Ida, Plymouth, Woodbury	44 min
Jun 11, 6:16 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster, Saline, Seward	59 min
Jun 11, 6:22 PM CDT	Tornado Warning	FSD	Ida, Woodbury	38 min
Jun 11, 6:23 PM CDT	Tornado Warning	OAX	Harrison, Monona	37 min
Jun 11, 6:25 PM CDT	Tornado Warning	FSD	Cottonwood, Murray	50 min
Jun 11, 6:27 PM CDT	Tornado Warning	OAX	Harrison, Pottawattamie	63 min
Jun 11, 6:28 PM CDT	Tornado Warning	FSD	Buena Vista, Cherokee, Clay, Dickinson, O'Brien	32 min
Jun 11, 6:32 PM CDT	Tornado Warning	MPX	Brown, Redwood	43 min
Jun 11, 6:37 PM CDT	Severe Thunderstorm Warning	FSD	Buena Vista, Cherokee, Ida	38 min
Jun 11, 6:40 PM CDT	Flash Flood Warning	OAX	Burt, Washington	3 hr
Jun 11, 6:48 PM CDT	Tornado Warning	FSD	Clay, Dickinson	42 min
Jun 11, 6:57 PM CDT	Tornado Warning	OAX	Harrison, Monona	23 min
Jun 11, 6:58 PM CDT	Tornado Warning	OAX	Cass, Lancaster, Otoe, Saline, Seward	62 min
Jun 11, 6:59 PM CDT	Tornado Warning	DMX	Crawford	46 min
Jun 11, 7:02 PM CDT	Tornado Warning	FSD	Dickinson	28 min
Jun 11, 7:03 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Saline, Saunders, Seward	42 min
Jun 11, 7:05 PM CDT	Tornado Warning	FSD	Cottonwood	25 min
Jun 11, 7:08 PM CDT	Tornado Warning	MPX	Brown, Watonwan	37 min
Jun 11, 7:11 PM CDT	Tornado Warning	OAX	Monona	12 min
Jun 11, 7:12 PM CDT	Tornado Warning	DMX	Emmet, Palo Alto	48 min
Jun 11, 7:13 PM CDT	Tornado Warning	OAX	Mills, Pottawattamie	62 min
Jun 11, 7:15 PM CDT	Tornado Warning	FSD	Buena Vista	30 min
Jun 11, 7:16 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Shelby	29 min
Jun 11, 7:16 PM CDT	Tornado Warning	MPX	Redwood	14 min
Jun 11, 7:20 PM CDT	Tornado Warning	FSD	Clay	25 min
Jun 11, 7:29 PM CDT	Tornado Warning	DMX	Emmet, Palo Alto	46 min
Jun 11, 7:30 PM CDT	Tornado Warning	OAX	Harrison, Pottawattamie, Shelby	30 min
Jun 11, 7:35 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Lancaster, Saline, Seward	40 min
Jun 11, 7:36 PM CDT	Flash Flood Warning	OAX	Douglas	3 hr
Jun 11, 7:37 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Shelby	38 min
Jun 11, 7:39 PM CDT	Tornado Warning	DMX	Crawford	18 min
Jun 11, 7:39 PM CDT	Tornado Warning	OAX	Harrison, Shelby	17 min
Jun 11, 7:39 PM CDT	Flash Flood Warning	OAX	Lancaster	3 hr
Jun 11, 7:41 PM CDT	Tornado Warning	DMX	Palo Alto, Pocahontas	34 min
Jun 11, 7:41 PM CDT	Tornado Warning	OAX	Cass, Lancaster, Sarpy, Saunders	34 min
Jun 11, 7:45 PM CDT	Tornado Warning	MPX	Brown, Nicollet	30 min
Jun 11, 7:46 PM CDT	Severe Thunderstorm Warning	DMX	Crawford	44 min
Jun 11, 7:47 PM CDT	Tornado Warning	OAX	Harrison, Pottawattamie, Shelby	28 min
Jun 11, 7:53 PM CDT	Tornado Warning	DMX	Crawford	52 min
Jun 11, 7:53 PM CDT	Tornado Warning	MPX	Blue Earth, Brown, Watonwan	37 min
Jun 11, 7:59 PM CDT	Flash Flood Warning	DMX	Crawford	6 hr
Jun 11, 8:00 PM CDT	Tornado Warning	FSD	Buena Vista, Ida	35 min
Jun 11, 8:01 PM CDT	Tornado Warning	OAX	Cass, Lancaster, Otoe	44 min
Jun 11, 8:02 PM CDT	Tornado Warning	DMX	Sac	28 min
Jun 11, 8:02 PM CDT	Tornado Warning	OAX	Shelby	28 min
Jun 11, 8:04 PM CDT	Tornado Warning	OAX	Gage, Jefferson, Lancaster, Saline	41 min
Jun 11, 8:05 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Faribault, Martin	40 min
Jun 11, 8:08 PM CDT	Flash Flood Warning	DMX	Palo Alto, Pocahontas	6 hr
Jun 11, 8:09 PM CDT	Flash Flood Warning	OAX	Harrison, Pottawattamie, Shelby	3 hr
Jun 11, 8:12 PM CDT	Severe Thunderstorm Warning	DMX	Kossuth	48 min
Jun 11, 8:13 PM CDT	Tornado Warning	OAX	Fremont, Mills, Pottawattamie	62 min
Jun 11, 8:13 PM CDT	Flash Flood Warning	OAX	Cass, Sarpy	3 hr
Jun 11, 8:14 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Lancaster, Saline, Seward	46 min
Jun 11, 8:15 PM CDT	Tornado Warning	DMX	Palo Alto, Pocahontas	45 min
Jun 11, 8:15 PM CDT	Tornado Warning	OAX	Pottawattamie, Shelby	18 min
Jun 11, 8:17 PM CDT	Tornado Warning	DMX	Audubon, Carroll	43 min
Jun 11, 8:22 PM CDT	Tornado Warning	MPX	Nicollet	23 min
Jun 11, 8:26 PM CDT	Tornado Warning	DMX	Palo Alto, Pocahontas	34 min
Jun 11, 8:26 PM CDT	Severe Thunderstorm Warning	MPX	Faribault	49 min
Jun 11, 8:31 PM CDT	Tornado Warning	DMX	Carroll	29 min
Jun 11, 8:33 PM CDT	Tornado Warning	DMX	Kossuth	42 min
Jun 11, 8:39 PM CDT	Tornado Warning	OAX	Gage, Jefferson	51 min
Jun 11, 8:41 PM CDT	Severe Thunderstorm Warning	MPX	Carver, Le Sueur, Scott, Sibley	64 min
Jun 11, 8:43 PM CDT	Tornado Warning	OAX	Gage, Jefferson, Johnson, Lancaster, Otoe, Saline	47 min
Jun 11, 8:46 PM CDT	Flash Flood Warning	OAX	Cass, Lancaster, Otoe	3 hr
Jun 11, 8:48 PM CDT	Severe Thunderstorm Warning	DMX	Carroll, Greene	27 min
Jun 11, 8:48 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Sac	57 min
Jun 11, 8:48 PM CDT	Tornado Warning	MPX	Sibley	27 min
Jun 11, 8:49 PM CDT	Severe Thunderstorm Warning	FSD	Woodbury	26 min
Jun 11, 8:52 PM CDT	Flash Flood Warning	DMX	Sac	6 hr
Jun 11, 8:52 PM CDT	Severe Thunderstorm Warning	MPX	Blue Earth, Waseca	38 min
Jun 11, 8:53 PM CDT	Flash Flood Warning	OAX	Mills, Montgomery, Pottawattamie	3 hr
Jun 11, 8:59 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Cass	46 min
Jun 11, 8:59 PM CDT	Tornado Warning	DMX	Palo Alto, Pocahontas	31 min
Jun 11, 9:00 PM CDT	Tornado Warning	OAX	Mills, Montgomery, Pottawattamie	45 min
Jun 11, 9:06 PM CDT	Flash Flood Warning	DMX	Kossuth	6 hr
Jun 11, 9:06 PM CDT	Tornado Warning	OAX	Fremont	39 min
Jun 11, 9:07 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills, Pottawattamie	38 min
Jun 11, 9:10 PM CDT	Severe Thunderstorm Warning	DMX	Webster	50 min
Jun 11, 9:10 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster, Saline, Seward	25 min
Jun 11, 9:12 PM CDT	Tornado Warning	DMX	Kossuth	33 min
Jun 11, 9:14 PM CDT	Tornado Warning	OAX	Fremont, Mills, Montgomery, Page, Pottawattamie	61 min
Jun 11, 9:16 PM CDT	Flash Flood Warning	DMX	Audubon, Carroll, Cass	6 hr
Jun 11, 9:18 PM CDT	Severe Thunderstorm Warning	DMX	Greene, Guthrie	42 min
Jun 11, 9:25 PM CDT	Flash Flood Warning	OAX	Gage, Jefferson, Johnson, Lancaster, Otoe, Saline	3 hr
Jun 11, 9:32 PM CDT	Flash Flood Warning	OAX	Montgomery, Pottawattamie	6 hr
Jun 11, 9:35 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Winnebago	40 min
Jun 11, 9:37 PM CDT	Severe Thunderstorm Warning	DMX	Kossuth, Winnebago	38 min
Jun 11, 9:53 PM CDT	Severe Thunderstorm Warning	MPX	Faribault, Freeborn	52 min
Jun 11, 9:55 PM CDT	Flash Flood Warning	DMX	Adair, Greene, Guthrie, Webster	6 hr
Jun 11, 9:57 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Humboldt, Webster, Wright	48 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, 7.9 hours before the alert went out and 165 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: 1784 J/kg
Mixed-layer CIN: -93 J/kg
Mixed-layer LCL: 818 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 548 m²/s²
0-3 km storm-relative helicity: 862 m²/s²
Significant tornado parameter: 4.9
Supercell composite: 43.9

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 10, 9:47 PM CDT	Mesoscale Discussion	SPC	Allamakee, Cerro Gordo, Chickasaw, Clayton, Fayette, Floyd and 4 more	88 min
Jun 10, 11:06 PM CDT	Mesoscale Discussion	SPC	Fremont, Harrison, Mills, Pottawattamie	54 min
Jun 11, 4:40 AM CDT	Mesoscale Discussion	SPC	Buena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 14 more	65 min
Jun 11, 5:16 AM CDT	Severe Thunderstorm Watch	SPC	Buena Vista, Calhoun, Cherokee, Clay, Dickinson, Emmet and 17 more	5 hr
Jun 11, 6:23 AM CDT	Mesoscale Discussion	SPC	Buena Vista, Cherokee, Clay, Dickinson, Emmet, Humboldt and 8 more	2 hr
Jun 11, 2:03 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Buena Vista, Calhoun, Carroll and 22 more	117 min
Jun 11, 5:59 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 35 more	91 min
Jun 11, 12:55 AM CDT	Severe Thunderstorm Watch	SPC	Big Stone, Traverse	7 hr
Jun 11, 3:19 AM CDT	Mesoscale Discussion	SPC	Lac qui Parle, Lincoln, Pipestone	116 min
Jun 10, 10:05 PM CDT	Mesoscale Discussion	SPC	Atchison	55 min
Jun 11, 3:37 PM CDT	Tornado Watch	SPC	Thayer	6 hr

Nearby

Tornado Watches in Iowa, 2008 Tornado Watches in Nebraska, 2008 Tornado Watches in Minnesota, 2008 Every tornado watch in 2008

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.