Alert archive / Iowa / Severe Thunderstorm Watches in 2014

Severe Thunderstorm Watch 372

June 30, 201448 counties in Iowa; 24 counties in Nebraska

The Storm Prediction Center issued this severe thunderstorm watch at Jun 30, 2014, 4:06 AM CDT for 48 counties in Iowa; 24 counties in Nebraska. It was in force for 10 hr.

The area

The outline as issued.

The facts

Issued: Jun 30, 2014, 4:06 AM CDT (09:06 UTC)
Expired: Jun 30, 2014, 2:00 PM CDT
In force: 10 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2.5 in
Strongest gust expected: 60 kt

All 72 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Boone County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Clarke County, IA, Crawford County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Fremont County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hardin County, IA, Harrison County, IA, Ida County, IA, Jasper 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, Page County, IA, Plymouth 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, Woodbury County, IA, Antelope County, NE, Boone County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Knox County, NE, Lancaster County, NE, Madison County, NE, Pierce County, NE, Platte County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE

The radar

The Omaha radar (KOAX), 97 km from the middle of the area, began a volume at 09:06 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: 20%
One or more EF2 to EF5 tornadoes: 5%
Ten or more severe wind reports: 40%
One or more gusts of 65 knots or more: 20%
Ten or more severe hail reports: 30%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 80%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 30, 4:08 AM CDT	Severe Thunderstorm Warning	DMX	Boone, Greene, Hamilton, Story, Webster	52 min
Jun 30, 4:23 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Greene, Webster	41 min
Jun 30, 4:29 AM CDT	Severe Thunderstorm Warning	OAX	Cedar, Pierce	31 min
Jun 30, 4:32 AM CDT	Severe Thunderstorm Warning	FSD	Dixon	43 min
Jun 30, 5:08 AM CDT	Severe Thunderstorm Warning	FSD	Woodbury	37 min
Jun 30, 6:09 AM CDT	Flash Flood Warning	DMX	Calhoun, Sac	10 hr
Jun 30, 6:26 AM CDT	Severe Thunderstorm Warning	OAX	Cedar, Pierce	34 min
Jun 30, 7:12 AM CDT	Severe Thunderstorm Warning	OAX	Burt, Dodge, Washington	33 min
Jun 30, 7:20 AM CDT	Severe Thunderstorm Warning	OAX	Antelope, Knox	29 min
Jun 30, 7:29 AM CDT	Severe Thunderstorm Warning	OAX	Cedar, Pierce, Wayne	46 min
Jun 30, 7:43 AM CDT	Severe Thunderstorm Warning	OAX	Harrison, Pottawattamie	32 min
Jun 30, 7:45 AM CDT	Severe Thunderstorm Warning	OAX	Harrison	30 min
Jun 30, 7:59 AM CDT	Tornado Warning	OAX	Pierce, Wayne	31 min
Jun 30, 8:14 AM CDT	Severe Thunderstorm Warning	OAX	Pottawattamie	46 min
Jun 30, 8:16 AM CDT	Severe Thunderstorm Warning	OAX	Harrison, Shelby	44 min
Jun 30, 8:24 AM CDT	Tornado Warning	OAX	Cuming, Stanton, Thurston, Wayne	36 min
Jun 30, 8:45 AM CDT	Severe Thunderstorm Warning	OAX	Harrison, Shelby	45 min
Jun 30, 8:51 AM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone	39 min
Jun 30, 8:57 AM CDT	Severe Thunderstorm Warning	OAX	Pottawattamie, Shelby	33 min
Jun 30, 8:59 AM CDT	Severe Thunderstorm Warning	OAX	Burt, Cuming, Thurston	31 min
Jun 30, 9:00 AM CDT	Severe Thunderstorm Warning	DMX	Audubon, Cass	30 min
Jun 30, 9:12 AM CDT	Severe Thunderstorm Warning	DMX	Sac	48 min
Jun 30, 9:18 AM CDT	Severe Thunderstorm Warning	OAX	Monona	42 min
Jun 30, 9:28 AM CDT	Severe Thunderstorm Warning	OAX	Shelby	34 min
Jun 30, 9:29 AM CDT	Severe Thunderstorm Warning	DMX	Audubon, Guthrie	46 min
Jun 30, 9:37 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Sac	38 min
Jun 30, 9:39 AM CDT	Severe Thunderstorm Warning	OAX	Shelby	23 min
Jun 30, 9:55 AM CDT	Severe Thunderstorm Warning	FSD	Ida, Woodbury	50 min
Jun 30, 9:57 AM CDT	Severe Thunderstorm Warning	OAX	Colfax, Cuming, Madison, Platte, Stanton, Wayne	48 min
Jun 30, 9:58 AM CDT	Severe Thunderstorm Warning	OAX	Monona	32 min
Jun 30, 10:01 AM CDT	Severe Thunderstorm Warning	FSD	Dakota, Dixon	44 min
Jun 30, 10:02 AM CDT	Severe Thunderstorm Warning	OAX	Antelope, Madison, Pierce	28 min
Jun 30, 10:09 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Webster	51 min
Jun 30, 10:13 AM CDT	Severe Thunderstorm Warning	DMX	Audubon, Dallas, Guthrie	42 min
Jun 30, 10:13 AM CDT	Severe Thunderstorm Warning	DMX	Crawford, Sac	47 min
Jun 30, 10:16 AM CDT	Severe Thunderstorm Warning	OAX	Burt, Cuming, Thurston, Wayne	44 min
Jun 30, 10:32 AM CDT	Severe Thunderstorm Warning	FSD	Cherokee, Ida, Plymouth, Woodbury	43 min
Jun 30, 10:37 AM CDT	Severe Thunderstorm Warning	OAX	Harrison, Monona	53 min
Jun 30, 10:37 AM CDT	Flash Flood Warning	OAX	Burt, Cuming, Stanton, Thurston, Wayne	3 hr
Jun 30, 10:44 AM CDT	Severe Thunderstorm Warning	FSD	Ida	13 min
Jun 30, 10:50 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Humboldt, Pocahontas, Webster	40 min
Jun 30, 10:51 AM CDT	Severe Thunderstorm Warning	OAX	Pierce, Wayne	39 min
Jun 30, 10:55 AM CDT	Severe Thunderstorm Warning	DMX	Hamilton, Webster, Wright	38 min
Jun 30, 10:59 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Crawford, Greene, Sac	46 min
Jun 30, 11:04 AM CDT	Flash Flood Warning	OAX	Harrison, Monona	3 hr
Jun 30, 11:06 AM CDT	Severe Thunderstorm Warning	DMX	Carroll, Crawford, Sac	54 min
Jun 30, 11:09 AM CDT	Severe Thunderstorm Warning	FSD	Buena Vista, Cherokee, Ida, Woodbury	36 min
Jun 30, 11:10 AM CDT	Severe Thunderstorm Warning	OAX	Harrison, Monona, Shelby	65 min
Jun 30, 11:24 AM CDT	Severe Thunderstorm Warning	DMX	Boone, Greene	51 min
Jun 30, 11:24 AM CDT	Severe Thunderstorm Warning	OAX	Thurston, Wayne	51 min
Jun 30, 11:36 AM CDT	Severe Thunderstorm Warning	DMX	Boone, Calhoun, Carroll, Greene, Hamilton, Webster	39 min
Jun 30, 11:36 AM CDT	Severe Thunderstorm Warning	OAX	Shelby	39 min
Jun 30, 11:42 AM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Crawford, Greene, Pocahontas, Sac	48 min
Jun 30, 11:48 AM CDT	Severe Thunderstorm Warning	DMX	Audubon, Guthrie	42 min
Jun 30, 11:50 AM CDT	Severe Thunderstorm Warning	FSD	Woodbury	40 min
Jun 30, 11:50 AM CDT	Severe Thunderstorm Warning	OAX	Pottawattamie	25 min
Jun 30, 11:56 AM CDT	Flash Flood Warning	OAX	Harrison, Pottawattamie, Shelby	3 hr
Jun 30, 12:04 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Audubon, Cass, Guthrie	41 min
Jun 30, 12:12 PM CDT	Flash Flood Warning	DMX	Audubon	6 hr
Jun 30, 12:12 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Hamilton, Hardin, Story, Webster	48 min
Jun 30, 12:37 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Dallas, Guthrie, Madison	53 min
Jun 30, 12:44 PM CDT	Tornado Warning	DMX	Adair, Dallas, Guthrie, Madison	31 min
Jun 30, 12:49 PM CDT	Flash Flood Warning	DMX	Boone, Hamilton, Story, Webster	6 hr
Jun 30, 12:56 PM CDT	Tornado Warning	DMX	Marshall, Story	34 min
Jun 30, 12:59 PM CDT	Severe Thunderstorm Warning	DMX	Grundy, Hamilton, Hardin, Marshall, Story	46 min
Jun 30, 1:10 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Polk	50 min
Jun 30, 1:16 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Madison, Marion, Polk, Warren	59 min
Jun 30, 1:25 PM CDT	Flash Flood Warning	DMX	Dallas, Polk	6 hr
Jun 30, 1:29 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Grundy, Hardin, Marshall, Tama	46 min
Jun 30, 1:38 PM CDT	Flash Flood Warning	DMX	Grundy, Hardin, Marshall, Story, Tama	6 hr
Jun 30, 1:46 PM CDT	Flash Flood Warning	DMX	Adair, Dallas, Guthrie	6 hr
Jun 30, 1:46 PM CDT	Tornado Warning	DMX	Marion, Warren	29 min
Jun 30, 1:50 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Mahaska, Marion, Poweshiek	40 min
Jun 30, 2:00 PM CDT	Flash Flood Warning	DMX	Black Hawk, Tama	6 hr
Jun 30, 2:00 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marshall, Poweshiek, Tama	45 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 00:00Z, 9.1 hours before the alert went out and 97 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: 2027 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 1288 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 146 m²/s²
0-3 km storm-relative helicity: 271 m²/s²
Significant tornado parameter: 2.3
Supercell composite: 24.3

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 29, 7:50 PM CDT	Mesoscale Discussion	SPC	Buchanan, Clayton, Delaware, Dubuque, Fayette, Jackson and 2 more	85 min
Jun 29, 8:15 PM CDT	Severe Thunderstorm Watch	SPC	Allamakee, Benton, Buchanan, Cedar, Chickasaw, Clayton and 14 more	7 hr
Jun 29, 9:43 PM CDT	Mesoscale Discussion	SPC	Allamakee, Buchanan, Cedar, Clayton, Clinton, Delaware and 6 more	92 min
Jun 29, 10:10 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Clarke, Dallas, Decatur and 16 more	65 min
Jun 29, 10:54 PM CDT	Tornado Watch	SPC	Clinton, Jackson	5 hr
Jun 30, 3:32 AM CDT	Mesoscale Discussion	SPC	Audubon, Boone, Calhoun, Carroll, Cherokee, Crawford and 15 more	58 min
Jun 30, 7:16 AM CDT	Mesoscale Discussion	SPC	Audubon, Benton, Black Hawk, Boone, Bremer, Buchanan and 36 more	89 min
Jun 30, 9:08 AM CDT	Mesoscale Discussion	SPC	Adair, Adams, Cass, Harrison, Mills, Montgomery and 2 more	67 min
Jun 30, 9:38 AM CDT	Tornado Watch	SPC	Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 46 more	10 hr
Jun 30, 10:48 AM CDT	Mesoscale Discussion	SPC	Audubon, Calhoun, Carroll, Crawford, Greene, Guthrie and 7 more	87 min
Jun 30, 1:27 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Audubon, Benton, Black Hawk and 60 more	93 min
Jun 30, 2:03 PM CDT	Tornado Watch	SPC	Benton, Buchanan, Cedar, Clayton, Clinton, Delaware and 17 more	5 hr
Jun 30, 3:17 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Audubon, Boone, Carroll and 28 more	58 min
Jun 30, 3:25 PM CDT	Mesoscale Discussion	SPC	Allamakee, Benton, Buchanan, Cedar, Clayton, Clinton and 18 more	35 min
Jun 30, 6:28 PM CDT	Mesoscale Discussion	SPC	Benton, Cedar, Clinton, Dubuque, Iowa, Jackson and 10 more	92 min
Jun 29, 11:53 PM CDT	Mesoscale Discussion	SPC	Adams, Buffalo, Clay, Custer, Dawson, Franklin and 13 more	97 min
Jun 30, 1:02 AM CDT	Severe Thunderstorm Watch	SPC	Adams, Antelope, Blaine, Boone, Brown, Buffalo and 31 more	10 hr
Jun 30, 12:06 PM CDT	Mesoscale Discussion	SPC	Pawnee, Richardson	54 min
Jun 30, 3:52 PM CDT	Mesoscale Discussion	SPC	Gage, Johnson, Nemaha, Pawnee, Richardson	113 min

Nearby

Severe Thunderstorm Watches in Iowa, 2014 Severe Thunderstorm Watches in Nebraska, 2014 Every severe thunderstorm watch in 2014

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.