Alert archive / Nebraska / Severe Thunderstorm Watches in 2017

Severe Thunderstorm Watch 339

June 16, 20178 counties in Iowa; 9 counties in Kansas; 51 counties in Nebraska

The Storm Prediction Center issued this severe thunderstorm watch at Jun 16, 2017, 3:30 PM CDT for 8 counties in Iowa; 9 counties in Kansas; 51 counties in Nebraska. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: Jun 16, 2017, 3:30 PM CDT (20:30 UTC)
Expired: Jun 16, 2017, 11:00 PM CDT
In force: 8 hr
Issued by: the Storm Prediction Center
Largest hail expected: 3 in
Strongest gust expected: 65 kt

All 68 counties

Fremont County, IA, Harrison County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Shelby County, IA, Brown County, KS, Jewell County, KS, Marshall County, KS, Nemaha County, KS, Norton County, KS, Phillips County, KS, Republic County, KS, Smith County, KS, Washington County, KS, Adams County, NE, Antelope County, NE, Boone County, NE, Buffalo County, NE, Burt County, NE, Butler County, NE, Cass County, NE, Cedar County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Franklin County, NE, Furnas County, NE, Gage 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, Knox County, NE, Lancaster 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, Thurston County, NE, Washington County, NE, Wayne County, NE, Webster County, NE, York County, NE

The radar

The Grand Island radar (KUEX), 76 km from the middle of the area, began a volume at 20:30 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: 2%
Ten or more severe wind reports: 80%
One or more gusts of 65 knots or more: 50%
Ten or more severe hail reports: 80%
One or more hailstones of 2 inches or more: 60%
Six or more combined severe hail and wind reports: 90%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 16, 3:54 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Knox, Pierce	38 min
Jun 16, 4:08 PM CDT	Severe Thunderstorm Warning	GID	Furnas, Harlan	21 min
Jun 16, 4:15 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Pierce	45 min
Jun 16, 4:44 PM CDT	Tornado Warning	OAX	Madison, Pierce	31 min
Jun 16, 4:57 PM CDT	Severe Thunderstorm Warning	OAX	Cuming, Stanton, Thurston, Wayne	48 min
Jun 16, 5:10 PM CDT	Tornado Warning	OAX	Madison, Pierce, Stanton	35 min
Jun 16, 5:15 PM CDT	Tornado Warning	OAX	Cuming, Pierce, Stanton, Wayne	30 min
Jun 16, 5:32 PM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone, Madison	28 min
Jun 16, 5:42 PM CDT	Tornado Warning	OAX	Colfax, Cuming, Madison, Platte, Stanton	33 min
Jun 16, 5:44 PM CDT	Tornado Warning	OAX	Cuming, Stanton	31 min
Jun 16, 5:58 PM CDT	Severe Thunderstorm Warning	OAX	Boone, Madison, Platte	32 min
Jun 16, 6:05 PM CDT	Severe Thunderstorm Warning	OAX	Burt, Cuming, Dodge	25 min
Jun 16, 6:09 PM CDT	Tornado Warning	OAX	Boone, Madison, Platte	16 min
Jun 16, 6:13 PM CDT	Severe Thunderstorm Warning	OAX	Colfax, Cuming, Dodge, Platte, Stanton	47 min
Jun 16, 6:18 PM CDT	Severe Thunderstorm Warning	OAX	Monona	42 min
Jun 16, 6:23 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Colfax, Madison, Platte	52 min
Jun 16, 6:27 PM CDT	Severe Thunderstorm Warning	OAX	Burt, Cuming, Dodge, Washington	48 min
Jun 16, 6:47 PM CDT	Severe Thunderstorm Warning	OAX	Harrison	28 min
Jun 16, 6:47 PM CDT	Severe Thunderstorm Warning	GID	Merrick, Nance, Polk	43 min
Jun 16, 7:03 PM CDT	Severe Thunderstorm Warning	GID	Hamilton	27 min
Jun 16, 7:07 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Monona, Pottawattamie, Shelby	38 min
Jun 16, 7:08 PM CDT	Severe Thunderstorm Warning	GID	Merrick, Nance, Polk	22 min
Jun 16, 7:14 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Colfax, Platte	16 min
Jun 16, 7:27 PM CDT	Severe Thunderstorm Warning	GID	Merrick, Polk, York	48 min
Jun 16, 7:30 PM CDT	Severe Thunderstorm Warning	OAX	Harrison, Mills, Pottawattamie	30 min
Jun 16, 7:34 PM CDT	Severe Thunderstorm Warning	GID	Fillmore, York	41 min
Jun 16, 7:43 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Lancaster, Saunders, Seward	47 min
Jun 16, 7:49 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Harrison, Mills, Pottawattamie	26 min
Jun 16, 7:51 PM CDT	Tornado Warning	OAX	Harrison, Shelby	11 min
Jun 16, 8:07 PM CDT	Tornado Warning	OAX	Fremont, Mills, Montgomery	23 min
Jun 16, 8:14 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Harrison, Mills, Montgomery, Page, Pottawattamie and 1 more	31 min
Jun 16, 8:15 PM CDT	Severe Thunderstorm Warning	GID	York	30 min
Jun 16, 8:23 PM CDT	Severe Thunderstorm Warning	OAX	Butler, Lancaster, Seward	52 min
Jun 16, 8:29 PM CDT	Tornado Warning	OAX	Mills, Montgomery, Pottawattamie	31 min
Jun 16, 8:43 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Mills, Montgomery, Page, Pottawattamie, Shelby	32 min
Jun 16, 8:45 PM CDT	Severe Thunderstorm Warning	GID	Fillmore, York	30 min
Jun 16, 8:51 PM CDT	Severe Thunderstorm Warning	OAX	Cass, Gage, Jefferson, Johnson, Lancaster, Nemaha and 5 more	39 min
Jun 16, 8:57 PM CDT	Tornado Warning	OAX	Nemaha, Otoe	33 min
Jun 16, 9:01 PM CDT	Tornado Warning	OAX	Gage, Lancaster, Saline	29 min
Jun 16, 9:10 PM CDT	Tornado Warning	OAX	Gage, Saline	35 min
Jun 16, 9:13 PM CDT	Severe Thunderstorm Warning	OAX	Fremont, Montgomery, Page	32 min
Jun 16, 9:15 PM CDT	Severe Thunderstorm Warning	GID	Fillmore, Thayer	45 min
Jun 16, 9:27 PM CDT	Severe Thunderstorm Warning	OAX	Fremont	48 min
Jun 16, 9:33 PM CDT	Tornado Warning	OAX	Gage	27 min
Jun 16, 9:49 PM CDT	Severe Thunderstorm Warning	TOP	Brown, Nemaha	41 min
Jun 16, 9:55 PM CDT	Severe Thunderstorm Warning	TOP	Marshall, Washington	50 min
Jun 16, 9:57 PM CDT	Tornado Warning	OAX	Gage, Pawnee	33 min
Jun 16, 10:00 PM CDT	Severe Thunderstorm Warning	GID	Thayer	45 min
Jun 16, 10:14 PM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson, Johnson, Nemaha, Pawnee, Richardson	46 min
Jun 16, 10:17 PM CDT	Severe Thunderstorm Warning	TOP	Republic, Washington	43 min
Jun 16, 10:29 PM CDT	Severe Thunderstorm Warning	TOP	Brown	46 min
Jun 16, 10:37 PM CDT	Severe Thunderstorm Warning	TOP	Marshall, Washington	38 min
Jun 16, 10:57 PM CDT	Severe Thunderstorm Warning	TOP	Washington	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, 8.5 hours before the alert went out and 133 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: 139 J/kg
Mixed-layer CIN: -389 J/kg
Mixed-layer LCL: 1600 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 277 m²/s²
0-3 km storm-relative helicity: 293 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 15, 9:33 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Benton, Black Hawk, Buchanan, Cedar and 32 more	57 min
Jun 16, 3:29 PM CDT	Mesoscale Discussion	SPC	Allamakee, Bremer, Buena Vista, Butler, Cerro Gordo, Cherokee and 21 more	91 min
Jun 16, 3:53 PM CDT	Severe Thunderstorm Watch	SPC	Allamakee, Black Hawk, Bremer, Buena Vista, Butler, Calhoun and 33 more	7 hr
Jun 16, 6:16 PM CDT	Mesoscale Discussion	SPC	Adams, Cass, Fremont, Harrison, Mills, Monona and 5 more	119 min
Jun 16, 6:56 PM CDT	Mesoscale Discussion	SPC	Allamakee, Benton, Black Hawk, Boone, Bremer, Buchanan and 31 more	64 min
Jun 15, 7:07 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Barber, Bourbon, Brown, Butler and 45 more	6 hr
Jun 16, 1:41 PM CDT	Mesoscale Discussion	SPC	Jewell, Marshall, Republic, Washington	94 min

Nearby

Severe Thunderstorm Watches in Nebraska, 2017 Severe Thunderstorm Watches in Kansas, 2017 Severe Thunderstorm Watches in Iowa, 2017 Every severe thunderstorm watch in 2017

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.