Alert archive / Iowa / Severe Thunderstorm Watches in 2018

Severe Thunderstorm Watch 245

June 30, 20184 states

The Storm Prediction Center issued this severe thunderstorm watch at Jun 30, 2018, 1:39 PM CDT for 4 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Jun 30, 2018, 1:39 PM CDT (18:39 UTC)
Expired: Jun 30, 2018, 9:00 PM CDT
In force: 7 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 111 counties

Adair County, IA, Adams County, IA, Allamakee County, IA, Audubon County, IA, Boone County, IA, Bremer County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clayton County, IA, Crawford County, IA, Dallas County, IA, Emmet County, IA, Fayette County, IA, Floyd 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, Howard County, IA, Humboldt County, IA, Kossuth County, IA, Madison County, IA, Marshall County, IA, Mills County, IA, Mitchell County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Palo Alto County, IA, Pocahontas County, IA, Polk County, IA, Pottawattamie County, IA, Ringgold County, IA, Sac County, IA, Shelby County, IA, Story County, IA, Taylor County, IA, Union County, IA, Webster County, IA, Winnebago County, IA, Winneshiek County, IA, Worth County, IA, Wright County, IA, Blue Earth County, MN, Dakota County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Houston County, MN, Le Sueur County, MN, Martin County, MN, Mower County, MN, Olmsted County, MN, Rice County, MN, Scott County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Washington County, MN, Winona County, MN, Burt County, NE, Butler County, NE, Cass 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, Washington County, NE, Adams County, WI, Barron County, WI, Buffalo County, WI, Chippewa County, WI, Clark County, WI, Crawford County, WI, Dunn County, WI, Eau Claire County, WI, Grant County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Monroe County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Richland County, WI, Rusk County, WI, Saint Croix County, WI, Taylor County, WI, Trempealeau County, WI, Vernon County, WI

The radar

The Des Moines radar (KDMX), 89 km from the middle of the area, began a volume at 18:40 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: 70%
One or more gusts of 65 knots or more: 20%
Ten or more severe hail reports: 60%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 30, 1:54 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Hancock, Winnebago, Worth	51 min
Jun 30, 2:23 PM CDT	Severe Thunderstorm Warning	DMX	Hancock, Humboldt, Kossuth, Wright	52 min
Jun 30, 2:45 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Worth	45 min
Jun 30, 2:55 PM CDT	Severe Thunderstorm Warning	DMX	Cerro Gordo, Franklin, Hancock, Wright	65 min
Jun 30, 3:41 PM CDT	Severe Thunderstorm Warning	ARX	Fillmore	49 min
Jun 30, 3:46 PM CDT	Severe Thunderstorm Warning	ARX	Buffalo, Trempealeau	59 min
Jun 30, 3:56 PM CDT	Severe Thunderstorm Warning	DMX	Butler, Franklin	49 min
Jun 30, 4:05 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll	25 min
Jun 30, 4:06 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Greene, Webster	24 min
Jun 30, 4:07 PM CDT	Tornado Warning	OAX	Harrison, Shelby	23 min
Jun 30, 4:09 PM CDT	Severe Thunderstorm Warning	DMX	Crawford	38 min
Jun 30, 4:09 PM CDT	Severe Thunderstorm Warning	DMX	Pocahontas	51 min
Jun 30, 4:10 PM CDT	Tornado Warning	DMX	Calhoun, Carroll, Greene, Webster	18 min
Jun 30, 4:12 PM CDT	Severe Thunderstorm Warning	OAX	Nemaha, Otoe	33 min
Jun 30, 4:27 PM CDT	Tornado Warning	DMX	Crawford	18 min
Jun 30, 4:27 PM CDT	Severe Thunderstorm Warning	ARX	Winona	48 min
Jun 30, 4:29 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Shelby	31 min
Jun 30, 4:31 PM CDT	Severe Thunderstorm Warning	DMX	Calhoun, Carroll, Greene	25 min
Jun 30, 4:38 PM CDT	Severe Thunderstorm Warning	ARX	Allamakee, Winneshiek	37 min
Jun 30, 4:43 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	47 min
Jun 30, 4:59 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Greene, Webster	46 min
Jun 30, 4:59 PM CDT	Severe Thunderstorm Warning	ARX	Houston, Winona	46 min
Jun 30, 5:02 PM CDT	Severe Thunderstorm Warning	DMX	Dallas, Madison, Polk	29 min
Jun 30, 5:06 PM CDT	Severe Thunderstorm Warning	DMX	Kossuth, Winnebago	24 min
Jun 30, 5:10 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills	35 min
Jun 30, 5:21 PM CDT	Severe Thunderstorm Warning	OAX	Pawnee	39 min
Jun 30, 5:38 PM CDT	Severe Thunderstorm Warning	OAX	Saline, Seward	37 min
Jun 30, 5:43 PM CDT	Severe Thunderstorm Warning	DMX	Boone, Dallas, Greene	23 min
Jun 30, 5:44 PM CDT	Severe Thunderstorm Warning	OAX	Mills	31 min
Jun 30, 5:50 PM CDT	Tornado Warning	OAX	Saline	40 min
Jun 30, 5:57 PM CDT	Severe Thunderstorm Warning	ARX	Juneau, Richland, Vernon	63 min
Jun 30, 6:12 PM CDT	Severe Thunderstorm Warning	OAX	Saline, Seward	48 min
Jun 30, 6:15 PM CDT	Severe Thunderstorm Warning	OAX	Johnson, Otoe	7 min
Jun 30, 6:29 PM CDT	Severe Thunderstorm Warning	ARX	Adams	46 min
Jun 30, 6:35 PM CDT	Severe Thunderstorm Warning	ARX	Dodge, Fillmore, Mower, Olmsted	40 min
Jun 30, 6:38 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Lancaster, Otoe	37 min
Jun 30, 6:42 PM CDT	Severe Thunderstorm Warning	OAX	Richardson	33 min
Jun 30, 6:43 PM CDT	Severe Thunderstorm Warning	DMX	Dallas	47 min
Jun 30, 6:47 PM CDT	Severe Thunderstorm Warning	DMX	Marshall, Polk, Story	43 min
Jun 30, 6:50 PM CDT	Severe Thunderstorm Warning	OAX	Pottawattamie	25 min
Jun 30, 6:53 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Otoe	37 min
Jun 30, 7:03 PM CDT	Severe Thunderstorm Warning	DMX	Black Hawk, Grundy, Marshall, Tama	57 min
Jun 30, 7:03 PM CDT	Severe Thunderstorm Warning	ARX	Fillmore, Houston, Winona	57 min
Jun 30, 7:03 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Seward	42 min
Jun 30, 7:05 PM CDT	Severe Thunderstorm Warning	DMX	Polk, Story	40 min
Jun 30, 7:07 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Lancaster, Sarpy, Saunders	23 min
Jun 30, 7:15 PM CDT	Severe Thunderstorm Warning	ARX	Fillmore, Olmsted	30 min
Jun 30, 7:18 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Saunders, Seward	31 min
Jun 30, 7:20 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster	25 min
Jun 30, 7:24 PM CDT	Severe Thunderstorm Warning	DMX	Jasper, Marshall, Polk, Story	36 min
Jun 30, 7:26 PM CDT	Flash Flood Warning	OAX	Douglas, Sarpy	3 hr
Jun 30, 7:28 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Sarpy, Saunders	32 min
Jun 30, 7:33 PM CDT	Flash Flood Warning	DMX	Polk, Story	6 hr
Jun 30, 7:42 PM CDT	Flash Flood Warning	DMX	Black Hawk, Grundy	6 hr
Jun 30, 7:42 PM CDT	Severe Thunderstorm Warning	ARX	Winona	23 min
Jun 30, 7:42 PM CDT	Severe Thunderstorm Warning	OAX	Lancaster, Saunders	33 min
Jun 30, 7:47 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Otoe	28 min
Jun 30, 7:48 PM CDT	Severe Thunderstorm Warning	ARX	La Crosse	26 min
Jun 30, 7:54 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Audubon, Cass, Guthrie	35 min
Jun 30, 8:02 PM CDT	Flash Flood Warning Emergency	DMX	Polk	6 hr
Jun 30, 8:14 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Dallas, Guthrie, Madison	46 min
Jun 30, 8:16 PM CDT	Flash Flood Warning Emergency	DMX	Dallas, Polk	6 hr
Jun 30, 8:45 PM CDT	Severe Thunderstorm Warning	DMX	Adair, Guthrie, Madison	30 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 30, 12:40 PM CDT	Mesoscale Discussion	SPC	Buena Vista, Calhoun, Carroll, Cerro Gordo, Cherokee, Chickasaw and 26 more	3 hr
Jun 30, 3:40 PM CDT	Mesoscale Discussion	SPC	Audubon, Boone, Butler, Calhoun, Carroll, Cass and 25 more	2 hr
Jun 30, 4:40 PM CDT	Mesoscale Discussion	SPC	Ringgold, Taylor	95 min
Jun 30, 6:09 PM CDT	Mesoscale Discussion	SPC	Fremont, Mills, Montgomery, Page	96 min
Jun 29, 10:57 PM CDT	Mesoscale Discussion	SPC	Aitkin, Benton, Big Stone, Carlton, Cass, Chippewa and 16 more	63 min
Jun 29, 11:56 PM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Benton, Carlton, Cass, Chippewa, Cook and 19 more	5 hr
Jun 30, 3:21 AM CDT	Mesoscale Discussion	SPC	Aitkin, Carlton, Cook, Itasca, Kanabec, Lake and 2 more	114 min
Jun 29, 9:37 PM CDT	Mesoscale Discussion	SPC	Franklin, Furnas, Gosper, Harlan, Kearney, Phelps and 2 more	113 min
Jun 30, 1:35 AM CDT	Mesoscale Discussion	SPC	Antelope, Arthur, Banner, Blaine, Brown, Garden and 12 more	85 min
Jun 30, 2:03 PM CDT	Mesoscale Discussion	SPC	Arthur, Banner, Box Butte, Cheyenne, Dawes, Deuel and 7 more	87 min
Jun 30, 3:03 PM CDT	Severe Thunderstorm Watch	SPC	Banner, Box Butte, Cheyenne, Dawes, Kimball, Morrill and 2 more	7 hr
Jun 30, 3:11 PM CDT	Mesoscale Discussion	SPC	Adams, Boone, Buffalo, Chase, Clay, Custer and 29 more	94 min
Jun 30, 3:26 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Arthur, Blaine, Buffalo, Chase, Cherry and 39 more	8 hr
Jun 30, 5:40 PM CDT	Mesoscale Discussion	SPC	Banner, Box Butte, Cheyenne, Deuel, Kimball, Morrill and 1 more	2 hr
Jun 30, 6:09 PM CDT	Severe Thunderstorm Watch	SPC	Dundy, Hitchcock, Red Willow	7 hr
Jun 30, 4:23 PM CDT	Mesoscale Discussion	SPC	Adams, Brown, Calumet, Clark, Columbia, Crawford and 34 more	67 min
Jun 30, 4:41 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Calumet, Columbia, Dane, Florence, Forest and 21 more	6 hr

Nearby

Severe Thunderstorm Watches in Iowa, 2018 Severe Thunderstorm Watches in Wisconsin, 2018 Severe Thunderstorm Watches in Minnesota, 2018 Every severe thunderstorm watch in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.