Alert archive / Nebraska / Severe Thunderstorm Watches in 2019

Severe Thunderstorm Watch 413

June 20, 201914 counties in Kansas; 59 counties in Nebraska

The Storm Prediction Center issued this severe thunderstorm watch at Jun 20, 2019, 9:44 PM CDT for 14 counties in Kansas; 59 counties in Nebraska. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued: Jun 20, 2019, 9:44 PM CDT (02:44 UTC)
Expired: Jun 21, 2019, 7:00 AM CDT
In force: 9 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 73 counties

Cheyenne County, KS, Decatur County, KS, Graham County, KS, Jewell County, KS, Marshall County, KS, Mitchell County, KS, Norton County, KS, Osborne County, KS, Phillips County, KS, Rawlins County, KS, Republic County, KS, Rooks County, KS, Smith County, KS, Washington County, KS, Adams County, NE, Arthur County, NE, Blaine County, NE, Boone County, NE, Buffalo County, NE, Butler County, NE, Chase County, NE, Cherry County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Custer County, NE, Dawson County, NE, Dodge County, NE, Dundy County, NE, Fillmore County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Gage County, NE, Garfield County, NE, Gosper County, NE, Grant County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Hooker County, NE, Howard County, NE, Jefferson County, NE, Kearney County, NE, Keith County, NE, Lancaster County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, Madison County, NE, McPherson County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Perkins County, NE, Phelps County, NE, Platte County, NE, Polk County, NE, Red Willow County, NE, Saline County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Stanton County, NE, Thayer County, NE, Thomas County, NE, Valley County, NE, Webster County, NE, Wheeler County, NE, York County, NE

The radar

The North Platte radar (KLNX), 124 km from the middle of the area, began a volume at 02:45 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: 50%
One or more gusts of 65 knots or more: 20%
Ten or more severe hail reports: 40%
One or more hailstones of 2 inches or more: 40%
Six or more combined severe hail and wind reports: 90%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 20, 10:09 PM CDT	Severe Thunderstorm Warning	LBF	Cherry, Sheridan	66 min
Jun 20, 10:35 PM CDT	Severe Thunderstorm Warning	GID	Furnas, Gosper	40 min
Jun 20, 10:39 PM CDT	Severe Thunderstorm Warning	GLD	Decatur, Norton, Rawlins, Sheridan	66 min
Jun 20, 11:00 PM CDT	Severe Thunderstorm Warning	GID	Furnas, Gosper	45 min
Jun 20, 11:00 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	45 min
Jun 20, 11:25 PM CDT	Severe Thunderstorm Warning	GID	Buffalo, Dawson, Gosper, Phelps	35 min
Jun 20, 11:33 PM CDT	Severe Thunderstorm Warning	LBF	Cherry	42 min
Jun 20, 11:34 PM CDT	Severe Thunderstorm Warning	GID	Phillips	41 min
Jun 20, 11:40 PM CDT	Severe Thunderstorm Warning	GLD	Norton	35 min
Jun 21, 12:00 AM CDT	Severe Thunderstorm Warning	GID	Buffalo, Dawson, Gosper, Phelps	45 min
Jun 21, 12:01 AM CDT	Severe Thunderstorm Warning	GLD	Decatur, Norton	29 min
Jun 21, 12:09 AM CDT	Severe Thunderstorm Warning	GID	Phillips, Smith	51 min
Jun 21, 12:10 AM CDT	Severe Thunderstorm Warning	LBF	Cherry	50 min
Jun 21, 12:50 AM CDT	Severe Thunderstorm Warning	GID	Adams, Buffalo, Clay, Franklin, Hall, Hamilton and 5 more	40 min
Jun 21, 1:30 AM CDT	Severe Thunderstorm Warning	GID	Adams, Clay, Fillmore, Hall, Hamilton, Howard and 5 more	45 min
Jun 21, 1:47 AM CDT	Severe Thunderstorm Warning	TOP	Republic	58 min
Jun 21, 1:58 AM CDT	Severe Thunderstorm Warning	GLD	Dundy	47 min
Jun 21, 2:00 AM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson, Lancaster, Saline, Seward	45 min
Jun 21, 2:12 AM CDT	Severe Thunderstorm Warning	GID	Fillmore, Hamilton, Howard, Merrick, Nance, Polk and 1 more	48 min
Jun 21, 2:25 AM CDT	Severe Thunderstorm Warning	OAX	Butler, Colfax, Platte, Saunders, Seward	50 min
Jun 21, 2:37 AM CDT	Severe Thunderstorm Warning	OAX	Lancaster, Otoe, Saline, Saunders, Seward	38 min
Jun 21, 2:40 AM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson, Johnson, Lancaster, Otoe, Pawnee and 1 more	50 min
Jun 21, 3:13 AM CDT	Severe Thunderstorm Warning	OAX	Cass, Lancaster, Otoe, Saline, Saunders, Seward	22 min
Jun 21, 3:53 AM CDT	Severe Thunderstorm Warning	GID	Adams, Clay, Nuckolls, Webster	23 min
Jun 21, 4:02 AM CDT	Severe Thunderstorm Warning	GID	Clay, Fillmore, Nuckolls, Thayer	43 min
Jun 21, 4:36 AM CDT	Severe Thunderstorm Warning	GID	Fillmore, Thayer	24 min
Jun 21, 5:30 AM CDT	Severe Thunderstorm Warning	GID	Jewell, Smith	60 min
Jun 21, 5:45 AM CDT	Severe Thunderstorm Warning	TOP	Cloud, Republic	60 min
Jun 21, 6:16 AM CDT	Severe Thunderstorm Warning	OAX	Jefferson, Saline	29 min
Jun 21, 6:26 AM CDT	Severe Thunderstorm Warning	GID	Fillmore, Thayer	19 min
Jun 21, 6:27 AM CDT	Severe Thunderstorm Warning	TOP	Clay, Cloud, Republic, Washington	63 min
Jun 21, 6:43 AM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson, Saline	32 min
Jun 21, 6:57 AM CDT	Severe Thunderstorm Warning	OAX	Gage, Jefferson, Johnson, Lancaster, Otoe, Pawnee and 1 more	33 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 2.7 hours before the alert went out and 71 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: 766 J/kg
Mixed-layer CIN: -209 J/kg
Mixed-layer LCL: 1735 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 173 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 20, 7:15 PM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Doniphan, Jackson, Jefferson, Johnson and 5 more	60 min
Jun 20, 8:14 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Cloud, Decatur, Graham, Jewell, Mitchell and 10 more	91 min
Jun 21, 12:42 AM CDT	Mesoscale Discussion	SPC	Graham, Jewell, Norton, Phillips, Republic, Rooks and 1 more	93 min
Jun 21, 2:07 AM CDT	Mesoscale Discussion	SPC	Brown, Doniphan, Nemaha	83 min
Jun 21, 2:39 AM CDT	Severe Thunderstorm Watch	SPC	Atchison, Brown, Clay, Cloud, Doniphan, Douglas and 14 more	8 hr
Jun 21, 4:34 AM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Clay, Cloud, Doniphan, Jackson and 15 more	86 min
Jun 21, 7:26 AM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Clay, Cloud, Doniphan, Douglas and 13 more	94 min
Jun 21, 8:28 AM CDT	Severe Thunderstorm Watch	SPC	Bourbon, Linn, Miami	9 hr
Jun 21, 5:20 PM CDT	Mesoscale Discussion	SPC	Greeley, Logan, Sherman, Thomas, Wallace, Wichita	85 min
Jun 21, 6:16 PM CDT	Severe Thunderstorm Watch	SPC	Greeley, Logan, Sherman, Thomas, Wallace, Wichita	6 hr
Jun 21, 6:24 PM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Clay, Dickinson, Doniphan, Douglas and 17 more	66 min

Nearby

Severe Thunderstorm Watches in Nebraska, 2019 Severe Thunderstorm Watches in Kansas, 2019 Every severe thunderstorm watch in 2019

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.