Alert archive / Iowa / Tornado Watches in 2010

Tornado Watch 241

June 1, 201062 counties in Iowa; 62 counties in Nebraska

The Storm Prediction Center issued this tornado watch at Jun 1, 2010, 1:53 PM CDT for 62 counties in Iowa; 62 counties in Nebraska. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued: Jun 1, 2010, 1:53 PM CDT (18:53 UTC)
Expired: Jun 1, 2010, 11:00 PM CDT
In force: 9 hr
Issued by: the Storm Prediction Center
Largest hail expected: 4 in
Strongest gust expected: 70 kt

All 124 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Black Hawk County, IA, Boone County, IA, Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Cass 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, 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, 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, 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, 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, Wright County, IA, Adams County, NE, Antelope County, NE, Blaine County, NE, Boone County, NE, Buffalo County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Custer County, NE, Dakota County, NE, Dawson County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Franklin County, NE, Frontier County, NE, Gage County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Howard County, NE, Jefferson County, NE, Johnson County, NE, Kearney County, NE, Lancaster County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Phelps County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Stanton County, NE, Thayer County, NE, Thomas County, NE, Thurston County, NE, Valley County, NE, Washington County, NE, Wayne County, NE, Webster County, NE, Wheeler County, NE, York County, NE

The radar

The Omaha radar (KOAX), 74 km from the middle of the area, began a volume at 18:56 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 60%
One or more EF2 to EF5 tornadoes: 30%
Ten or more severe wind reports: 50%
One or more gusts of 65 knots or more: 30%
Ten or more severe hail reports: 90%
One or more hailstones of 2 inches or more: 80%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 1, 1:59 PM CDT	Tornado Warning	FSD	Clay	31 min
Jun 1, 2:17 PM CDT	Tornado Warning	DMX	Emmet, Palo Alto	43 min
Jun 1, 2:47 PM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Plymouth	28 min
Jun 1, 2:57 PM CDT	Severe Thunderstorm Warning	OAX	Cuming, Stanton	48 min
Jun 1, 3:05 PM CDT	Severe Thunderstorm Warning	LBF	Cherry, Thomas	40 min
Jun 1, 3:09 PM CDT	Severe Thunderstorm Warning	OAX	Madison, Stanton	16 min
Jun 1, 3:24 PM CDT	Tornado Warning	OAX	Burt, Colfax, Cuming, Dodge	51 min
Jun 1, 3:32 PM CDT	Severe Thunderstorm Warning	GID	Nance	43 min
Jun 1, 3:37 PM CDT	Severe Thunderstorm Warning	FSD	Ida, Woodbury	23 min
Jun 1, 3:41 PM CDT	Severe Thunderstorm Warning	OAX	Boone, Madison, Platte	49 min
Jun 1, 3:45 PM CDT	Severe Thunderstorm Warning	OAX	Burt, Cuming	45 min
Jun 1, 3:58 PM CDT	Tornado Warning	GID	Merrick, Nance	18 min
Jun 1, 4:08 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Ringgold, Taylor, Union	52 min
Jun 1, 4:12 PM CDT	Severe Thunderstorm Warning	GID	Merrick, Nance	28 min
Jun 1, 4:19 PM CDT	Tornado Warning	OAX	Burt, Washington	41 min
Jun 1, 4:25 PM CDT	Severe Thunderstorm Warning	OAX	Colfax, Platte	35 min
Jun 1, 4:28 PM CDT	Severe Thunderstorm Warning	OAX	Dodge	32 min
Jun 1, 4:30 PM CDT	Severe Thunderstorm Warning	DMX	Adams	30 min
Jun 1, 4:35 PM CDT	Severe Thunderstorm Warning	GID	Polk	25 min
Jun 1, 4:39 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Colfax, Dodge, Saunders	40 min
Jun 1, 4:43 PM CDT	Severe Thunderstorm Warning	OAX	Dodge, Washington	47 min
Jun 1, 4:52 PM CDT	Tornado Warning	OAX	Harrison, Pottawattamie	38 min
Jun 1, 4:56 PM CDT	Severe Thunderstorm Warning	OAX	Douglas, Saunders	49 min
Jun 1, 4:57 PM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Webster	48 min
Jun 1, 4:58 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Madison, Union	47 min
Jun 1, 5:01 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Decatur, Madison, Ringgold, Union	44 min
Jun 1, 5:06 PM CDT	Tornado Warning	DMX	Clarke, Decatur, Ringgold, Union	39 min
Jun 1, 5:08 PM CDT	Tornado Warning	OAX	Harrison, Pottawattamie	52 min
Jun 1, 5:13 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Saunders	47 min
Jun 1, 5:32 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Pottawattamie	43 min
Jun 1, 5:35 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Lucas, Marion, Warren	40 min
Jun 1, 5:42 PM CDT	Severe Thunderstorm Warning	OAX	Mills, Pottawattamie	48 min
Jun 1, 5:45 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Decatur, Lucas, Wayne	27 min
Jun 1, 5:46 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Dallas, Guthrie, Madison	44 min
Jun 1, 5:46 PM CDT	Severe Thunderstorm Warning	GID	York	29 min
Jun 1, 5:52 PM CDT	Severe Thunderstorm Warning	LBF	Custer	38 min
Jun 1, 5:54 PM CDT	Flash Flood Warning	OAX	Pottawattamie	97 min
Jun 1, 5:55 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Carroll	50 min
Jun 1, 5:57 PM CDT	Tornado Warning	OAX	Pottawattamie	48 min
Jun 1, 5:59 PM CDT	Tornado Warning	OAX	Fremont, Mills	31 min
Jun 1, 6:09 PM CDT	Severe Thunderstorm Warning	LBF	Lincoln, Logan, McPherson	51 min
Jun 1, 6:11 PM CDT	Severe Thunderstorm Warning	GID	Fillmore, York	49 min
Jun 1, 6:15 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Pottawattamie, Shelby	45 min
Jun 1, 6:16 PM CDT	Severe Thunderstorm Warning	OAX	Mills, Montgomery, Pottawattamie	44 min
Jun 1, 6:23 PM CDT	Severe Thunderstorm Warning	DMX	Carroll, Dallas, Greene, Guthrie	52 min
Jun 1, 6:27 PM CDT	Tornado Warning	OAX	Pottawattamie	48 min
Jun 1, 6:29 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster, Saline, Seward	46 min
Jun 1, 6:31 PM CDT	Tornado Warning	DMX	Cass	44 min
Jun 1, 6:45 PM CDT	Severe Thunderstorm Warning	DMX	Audubon, Guthrie	30 min
Jun 1, 6:49 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Cass, Union	41 min
Jun 1, 6:50 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska, Marion, Monroe, Wapello	40 min
Jun 1, 6:52 PM CDT	Severe Thunderstorm Warning	OAX	Montgomery, Page	38 min
Jun 1, 6:57 PM CDT	Severe Thunderstorm Warning	OAX	Mills	33 min
Jun 1, 6:59 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Lancaster, Saline	46 min
Jun 1, 7:03 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	42 min
Jun 1, 7:12 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Polk	48 min
Jun 1, 7:15 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis, Wapello	45 min
Jun 1, 7:20 PM CDT	Severe Thunderstorm Warning	OAX	Page	25 min
Jun 1, 7:29 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Adams, Cass, Union	46 min
Jun 1, 7:33 PM CDT	Flash Flood Warning	DMX	Dallas, Guthrie	4 hr
Jun 1, 7:34 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson, Lancaster, Saline	41 min
Jun 1, 7:42 PM CDT	Severe Thunderstorm Warning	DMX	Adams, Ringgold, Taylor	48 min
Jun 1, 7:50 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Page	40 min
Jun 1, 7:58 PM CDT	Tornado Warning	DMX	Adair, Clarke, Madison, Union	32 min
Jun 1, 8:02 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson	43 min
Jun 1, 8:10 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Madison, Warren	50 min
Jun 1, 8:14 PM CDT	Severe Thunderstorm Warning	DMX	Clarke, Decatur, Ringgold, Union	46 min
Jun 1, 8:22 PM CDT	Severe Thunderstorm Warning	DMX	Taylor	38 min
Jun 1, 8:25 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson	35 min
Jun 1, 8:36 PM CDT	Tornado Warning	DMX	Madison, Warren	24 min
Jun 1, 8:46 PM CDT	Severe Thunderstorm Warning	DMX	Ringgold	44 min
Jun 1, 8:47 PM CDT	Tornado Warning	DMX	Clarke, Decatur, Lucas, Wayne	28 min
Jun 1, 9:02 PM CDT	Tornado Warning	DMX	Marion, Warren	28 min
Jun 1, 9:08 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Pawnee	37 min
Jun 1, 9:13 PM CDT	Tornado Warning	DMX	Clarke, Decatur, Lucas, Wayne	32 min
Jun 1, 9:19 PM CDT	Severe Thunderstorm Warning	DMX	Decatur, Ringgold	41 min
Jun 1, 9:30 PM CDT	Tornado Warning	DMX	Mahaska, Marion	30 min
Jun 1, 9:45 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Wayne	45 min
Jun 1, 9:49 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis, Monroe, Wapello	41 min
Jun 1, 10:02 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska	28 min
Jun 1, 10:06 PM CDT	Severe Thunderstorm Warning	LBF	Frontier	54 min
Jun 1, 10:09 PM CDT	Severe Thunderstorm Warning	LBF	Frontier, Hayes	51 min
Jun 1, 10:28 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Davis, Wapello	36 min
Jun 1, 10:44 PM CDT	Severe Thunderstorm Warning	LBF	Frontier	33 min
Jun 1, 11:00 PM CDT	Severe Thunderstorm Warning	LBF	Frontier	60 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, 6.9 hours before the alert went out and 74 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: 1529 J/kg
Mixed-layer CIN: -110 J/kg
Mixed-layer LCL: 815 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 36 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 1, 10:21 AM CDT	Mesoscale Discussion	SPC	Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 31 more	54 min
Jun 1, 1:36 PM CDT	Mesoscale Discussion	SPC	Adair, Audubon, Boone, Buena Vista, Butler, Calhoun and 43 more	54 min
Jun 1, 5:39 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Audubon, Boone, Buena Vista and 52 more	96 min
Jun 1, 6:25 PM CDT	Severe Thunderstorm Watch	SPC	Benton, Buchanan, Cedar, Des Moines, Henry, Iowa and 10 more	8 hr
May 31, 9:16 PM CDT	Mesoscale Discussion	SPC	Clark, Meade, Seward, Stevens	119 min
Jun 1, 5:53 AM CDT	Mesoscale Discussion	SPC	Jewell, Smith	97 min
Jun 1, 6:20 PM CDT	Mesoscale Discussion	SPC	Barton, Cloud, Decatur, Ellis, Ellsworth, Graham and 18 more	2 hr
Jun 1, 8:46 AM CDT	Severe Thunderstorm Watch	SPC	Adams, Antelope, Blaine, Boone, Boyd, Brown and 56 more	7 hr
Jun 1, 12:37 PM CDT	Mesoscale Discussion	SPC	Adams, Antelope, Blaine, Boone, Boyd, Brown and 56 more	53 min
Jun 1, 3:45 PM CDT	Mesoscale Discussion	SPC	Boyd, Brown, Cedar, Cherry, Holt, Hooker and 3 more	60 min

Nearby

Tornado Watches in Iowa, 2010 Tornado Watches in Nebraska, 2010 Every tornado watch in 2010

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.