A strong upper level trough of low pressure lifted across the central Rockies during the late afternoon of May 17th. As this feature approached a stalled out frontal boundary, which was anchored along the Kansas and Nebraska border, thunderstorms developed and quickly became severe as they lifted north. A lone supercell produced multiple tornadoes while moving northeast through Frontier County. Two farms sustained damage with the Johnson's farm sustaining damage to every building with the tornado rated an EF-3. As storms moved northeast large hail and damaging winds were reported.

Hail in HOOKER, NEBRASKA
From 17-MAY-19 17:00:00 to 17-MAY-19 17:00:00 (MST-7)
Location: MULLEN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in FRONTIER, NEBRASKA
From 17-MAY-19 17:43:00 to 17-MAY-19 17:43:00 (CST-6)
Location: STOCKVILLE
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Time estimated from radar.

Hail in BROWN, NEBRASKA
From 17-MAY-19 16:56:00 to 17-MAY-19 16:56:00 (CST-6)
Location: (ANW)AINSWORTH MUNI
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in HAYES, NEBRASKA
From 17-MAY-19 17:30:00 to 17-MAY-19 17:30:00 (CST-6)
Location: HAYES CENTER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in THOMAS, NEBRASKA
From 17-MAY-19 15:10:00 to 17-MAY-19 15:10:00 (CST-6)
Location: THEDFORD
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Golf ball sized hail and some quarter sized hail fell.

Hail in THOMAS, NEBRASKA
From 17-MAY-19 15:15:00 to 17-MAY-19 15:15:00 (CST-6)
Location: THEDFORD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in KEITH, NEBRASKA
From 17-MAY-19 15:40:00 to 17-MAY-19 15:40:00 (MST-7)
Location: LEMOYNE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DEUEL, NEBRASKA
From 17-MAY-19 14:50:00 to 17-MAY-19 14:50:00 (MST-7)
Location: CHAPPELL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LOUP, NEBRASKA
From 17-MAY-19 16:21:00 to 17-MAY-19 16:21:00 (CST-6)
Location: ALMERIA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LINCOLN, NEBRASKA
From 17-MAY-19 18:14:00 to 17-MAY-19 18:14:00 (CST-6)
Location: WELLFLEET
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Delayed report sent via social media.

Tornado in FRONTIER, NEBRASKA
From 17-MAY-19 17:11:00 to 17-MAY-19 17:14:00 (CST-6)
Location: HUGH BUTLER LAKE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Tornado touched down in far northern Red Willow county and crossed into southern Frontier county. No damage was reported.

Hail in LINCOLN, NEBRASKA
From 17-MAY-19 20:49:00 to 17-MAY-19 20:49:00 (CST-6)
Location: BRADY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in KEITH, NEBRASKA
From 17-MAY-19 17:27:00 to 17-MAY-19 17:27:00 (MST-7)
Location: LEMOYNE
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind from the west northwest.

Hail in KEITH, NEBRASKA
From 17-MAY-19 15:40:00 to 17-MAY-19 15:40:00 (MST-7)
Location: LEMOYNE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Lightning in LINCOLN, NEBRASKA
From 16-MAY-19 20:30:00 to 16-MAY-19 20:30:00 (CST-6)
Location: NORTH PLATTE
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Lightning struck a transformer on the west side of North Platte leading to a power outage on the west side of town.

Hail in LOGAN, NEBRASKA
From 17-MAY-19 20:02:00 to 17-MAY-19 20:02:00 (CST-6)
Location: STAPLETON
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in CUSTER, NEBRASKA
From 17-MAY-19 20:07:00 to 17-MAY-19 20:07:00 (CST-6)
Location: BERWYN
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LINCOLN, NEBRASKA
From 17-MAY-19 20:30:00 to 17-MAY-19 20:30:00 (CST-6)
Location: BRADY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in CUSTER, NEBRASKA
From 17-MAY-19 20:35:00 to 17-MAY-19 20:35:00 (CST-6)
Location: ARNOLD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CUSTER, NEBRASKA
From 17-MAY-19 19:45:00 to 17-MAY-19 19:45:00 (CST-6)
Location: OCONTO
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HOOKER, NEBRASKA
From 17-MAY-19 17:12:00 to 17-MAY-19 17:12:00 (MST-7)
Location: MULLEN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail up to quarter size reported.

Hail in HOOKER, NEBRASKA
From 17-MAY-19 17:14:00 to 17-MAY-19 17:14:00 (MST-7)
Location: MULLEN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Pea to golf ball sized hail reported.

Hail in HOOKER, NEBRASKA
From 17-MAY-19 17:30:00 to 17-MAY-19 17:30:00 (MST-7)
Location: MULLEN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LINCOLN, NEBRASKA
From 17-MAY-19 18:40:00 to 17-MAY-19 18:40:00 (CST-6)
Location: BRADY
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in FRONTIER, NEBRASKA
From 17-MAY-19 18:41:00 to 17-MAY-19 18:41:00 (CST-6)
Location: STOCKVILLE
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BROWN, NEBRASKA
From 17-MAY-19 18:43:00 to 17-MAY-19 18:43:00 (CST-6)
Location: JOHNSTOWN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CHERRY, NEBRASKA
From 17-MAY-19 18:53:00 to 17-MAY-19 18:53:00 (CST-6)
Location: BROWNLEE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LINCOLN, NEBRASKA
From 17-MAY-19 19:17:00 to 17-MAY-19 19:17:00 (CST-6)
Location: HERSHEY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in PERKINS, NEBRASKA
From 17-MAY-19 14:35:00 to 17-MAY-19 14:35:00 (MST-7)
Location: BRANDON
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in FRONTIER, NEBRASKA
From 17-MAY-19 18:05:00 to 17-MAY-19 18:09:00 (CST-6)
Location: STOCKVILLE
Tornado F-scale: EF3
Property damage: 100.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado touched down 8 miles northeast of Stockville. It traveled northeast striking a farmstead 10 miles northeast of Stockville. Two buildings were destroyed with extensive damage to multiple structures at this farmstead.

Tornado in FRONTIER, NEBRASKA
From 17-MAY-19 17:58:00 to 17-MAY-19 18:00:00 (CST-6)
Location: STOCKVILLE
Tornado F-scale: EF2
Property damage: 12.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Tornado rolled numerous hay bales across a road and into ditches. Twelve power poles were also snapped.

Tornado in FRONTIER, NEBRASKA
From 17-MAY-19 18:12:00 to 17-MAY-19 18:13:00 (CST-6)
Location: STOCKVILLE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Tornado briefly touched down twisting a large cedar tree and broke large tree limbs.

Tornado in FRONTIER, NEBRASKA
From 17-MAY-19 18:15:00 to 17-MAY-19 18:16:00 (CST-6)
Location: MOOREFIELD
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Tornado touched down in Frontier County, then moved northeast into Dawson County. In Frontier County the tornado downed large tree limbs.

Tornado in CUSTER, NEBRASKA
From 17-MAY-19 19:30:00 to 17-MAY-19 19:31:00 (CST-6)
Location: OCONTO
Tornado F-scale: EF1
Property damage: 15.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Tornado touched down in a field and damaged a pole barn, snapped a large tree and produced minor porch damage to a homestead. A horse trailer was rolled over two wooden fences and a metal fence prior to landing in a horse corral.

Tornado in FRONTIER, NEBRASKA
From 17-MAY-19 17:32:00 to 17-MAY-19 17:33:00 (CST-6)
Location: STOCKVILLE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Brief touchdown in an open field. No damage reported.

Tornado in FRONTIER, NEBRASKA
From 17-MAY-19 17:45:00 to 17-MAY-19 17:46:00 (CST-6)
Location: STOCKVILLE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado briefly touched down in an open field just northwest of Stockville. No damage occurred.

Tornado in FRONTIER, NEBRASKA
From 17-MAY-19 17:55:00 to 17-MAY-19 17:57:00 (CST-6)
Location: STOCKVILLE
Tornado F-scale: EF0
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Several 1400 pound hay bales were rolled into two fence lines damaging numerous posts.

Hail in HOOKER, NEBRASKA
From 17-MAY-19 17:23:00 to 17-MAY-19 17:23:00 (MST-7)
Location: MULLEN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement