Alert archive / Nebraska / Severe Thunderstorm Watches in 2014

Severe Thunderstorm Watch 371

June 30, 201437 counties in Nebraska

The Storm Prediction Center issued this severe thunderstorm watch at Jun 30, 2014, 1:02 AM CDT for 37 counties in Nebraska. It was in force for 10 hr.

The area

The outline as issued.

The facts

Issued: Jun 30, 2014, 1:02 AM CDT (06:02 UTC)
Expired: Jun 30, 2014, 10:50 AM CDT
In force: 10 hr
Issued by: the Storm Prediction Center
Largest hail expected: 3 in
Strongest gust expected: 60 kt

All 37 counties

Adams County, NE, Antelope County, NE, Blaine County, NE, Boone County, NE, Brown County, NE, Buffalo County, NE, Clay County, NE, Custer County, NE, Dawson County, NE, Fillmore County, NE, Frontier County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Hayes County, NE, Holt County, NE, Howard County, NE, Kearney County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, Madison County, NE, McPherson County, NE, Merrick County, NE, Nance County, NE, Phelps County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Rock County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Wheeler County, NE, York County, NE

The radar

The North Platte radar (KLNX), 97 km from the middle of the area, began a volume at 06:01 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: 10%
One or more EF2 to EF5 tornadoes: 5%
Ten or more severe wind reports: 30%
One or more gusts of 65 knots or more: 10%
Ten or more severe hail reports: 40%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 60%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 30, 1:11 AM CDT	Severe Thunderstorm Warning	LBF	Blaine, Custer, Garfield, Loup	49 min
Jun 30, 1:40 AM CDT	Severe Thunderstorm Warning	GID	Valley	50 min
Jun 30, 1:57 AM CDT	Severe Thunderstorm Warning	LBF	Custer, Garfield, Loup	18 min
Jun 30, 2:15 AM CDT	Severe Thunderstorm Warning	LBF	Garfield, Loup, Wheeler	45 min
Jun 30, 2:24 AM CDT	Severe Thunderstorm Warning	GID	Greeley, Valley	21 min
Jun 30, 3:33 AM CDT	Severe Thunderstorm Warning	OAX	Antelope, Knox, Pierce	27 min
Jun 30, 3:43 AM CDT	Severe Thunderstorm Warning	LBF	Wheeler	17 min
Jun 30, 3:51 AM CDT	Severe Thunderstorm Warning	OAX	Antelope, Knox, Pierce	39 min
Jun 30, 4:01 AM CDT	Severe Thunderstorm Warning	OAX	Cedar, Pierce	29 min
Jun 30, 4:29 AM CDT	Severe Thunderstorm Warning	OAX	Cedar, Pierce	31 min
Jun 30, 6:26 AM CDT	Severe Thunderstorm Warning	OAX	Cedar, Pierce	34 min
Jun 30, 7:03 AM CDT	Severe Thunderstorm Warning	LBF	Holt	27 min
Jun 30, 7:20 AM CDT	Severe Thunderstorm Warning	OAX	Antelope, Knox	29 min
Jun 30, 7:21 AM CDT	Severe Thunderstorm Warning	LBF	Blaine, Brown, Garfield, Holt, Loup, Rock and 1 more	39 min
Jun 30, 7:29 AM CDT	Severe Thunderstorm Warning	OAX	Cedar, Pierce, Wayne	46 min
Jun 30, 7:59 AM CDT	Tornado Warning	OAX	Pierce, Wayne	31 min
Jun 30, 8:13 AM CDT	Severe Thunderstorm Warning	LBF	Garfield, Holt, Wheeler	47 min
Jun 30, 8:51 AM CDT	Severe Thunderstorm Warning	OAX	Antelope, Boone	39 min
Jun 30, 9:57 AM CDT	Severe Thunderstorm Warning	OAX	Colfax, Cuming, Madison, Platte, Stanton, Wayne	48 min
Jun 30, 10:02 AM CDT	Severe Thunderstorm Warning	OAX	Antelope, Madison, Pierce	28 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, 6.0 hours before the alert went out and 109 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3062 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 287 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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, 11:53 PM CDT	Mesoscale Discussion	SPC	Adams, Buffalo, Clay, Custer, Dawson, Franklin and 13 more	97 min
Jun 30, 3:32 AM CDT	Mesoscale Discussion	SPC	Antelope, Boone, Burt, Cedar, Cuming, Dakota and 8 more	58 min
Jun 30, 4:06 AM CDT	Severe Thunderstorm Watch	SPC	Antelope, Boone, Burt, Butler, Cass, Cedar and 18 more	10 hr
Jun 30, 7:16 AM CDT	Mesoscale Discussion	SPC	Antelope, Boone, Burt, Cedar, Colfax, Cuming and 18 more	89 min
Jun 30, 9:08 AM CDT	Mesoscale Discussion	SPC	Burt, Colfax, Cuming, Dodge, Douglas, Sarpy and 2 more	67 min
Jun 30, 9:38 AM CDT	Tornado Watch	SPC	Antelope, Boone, Burt, Butler, Cass, Colfax and 22 more	10 hr
Jun 30, 10:48 AM CDT	Mesoscale Discussion	SPC	Burt, Cuming, Dakota, Thurston	87 min
Jun 30, 12:06 PM CDT	Mesoscale Discussion	SPC	Pawnee, Richardson	54 min
Jun 30, 1:27 PM CDT	Mesoscale Discussion	SPC	Butler, Cass, Dodge, Douglas, Lancaster, Otoe and 5 more	93 min
Jun 30, 3:52 PM CDT	Mesoscale Discussion	SPC	Gage, Johnson, Nemaha, Pawnee, Richardson	113 min

Nearby

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.