Isolated thunderstorms developed over far northeastern Colorado mid afternoon on June 17th and tracked into Deuel where they became severe. Storms moved east northeast into the Sandhills and remained severe through the mid evening hours. Large hail, damaging winds and tornadoes were reported from Deuel county, east northeast into Blaine county.

Thunderstorm Wind in KEITH, NEBRASKA
From 17-JUN-18 14:25:00 to 17-JUN-18 14:25:00 (MST-7)
Location: KEYSTONE
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Measured wind gust of 64 MPH at this location.

Thunderstorm Wind in KEITH, NEBRASKA
From 17-JUN-18 14:25:00 to 17-JUN-18 14:25:00 (MST-7)
Location: KEYSTONE
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm wind gust of 70 MPH measured at this location.

Thunderstorm Wind in LOGAN, NEBRASKA
From 17-JUN-18 16:30:00 to 17-JUN-18 16:30:00 (CST-6)
Location: STAPLETON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Estimated wind gust of 60 MPH at this location.

Tornado in DEUEL, NEBRASKA
From 17-JUN-18 13:17:00 to 17-JUN-18 13:28:00 (MST-7)
Location: BIG SPGS
Tornado F-scale: EF1
Property damage: 125.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down and damaged two farmsteads along its path. The first farmstead had a livestock shed which lost its roof.  Wooden beams were tossed 30 yards, piercing the side of a garage. Shingles were ripped off of nearby outbuildings. The tornado then passed onto another farmstead where two full irrigation pivots were flipped, the first by the tornado, and a second by straight line winds. Large branches were also broken off of trees at this location.

Tornado in KEITH, NEBRASKA
From 17-JUN-18 13:50:00 to 17-JUN-18 13:50:00 (MST-7)
Location: BRULE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado briefly touched down in an open field with no damage reported.

Tornado in KEITH, NEBRASKA
From 17-JUN-18 15:01:00 to 17-JUN-18 15:01:00 (MST-7)
Location: SARBEN
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Tornado touched down briefly in an open field with no damage reported.

Tornado in MCPHERSON, NEBRASKA
From 17-JUN-18 16:13:00 to 17-JUN-18 16:17:00 (CST-6)
Location: TRYON
Tornado F-scale: EF1
Property damage: 60.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A rental house and a tree line were damaged by the tornado.  The tornado continued to the northeast where it hit another homestead where windows were shattered and a door was blown in on a residence. A full irrigation pivot was also flipped at this location.

Hail in KEITH, NEBRASKA
From 17-JUN-18 14:25:00 to 17-JUN-18 14:25:00 (MST-7)
Location: KEYSTONE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail ranged in size from nickles to golf balls.

Hail in BLAINE, NEBRASKA
From 17-JUN-18 17:32:00 to 17-JUN-18 17:32:00 (CST-6)
Location: BREWSTER
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Pea to half dollar sized hail reported at this location.

Hail in BLAINE, NEBRASKA
From 17-JUN-18 17:50:00 to 17-JUN-18 17:50:00 (CST-6)
Location: BREWSTER
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in DEUEL, NEBRASKA
From 17-JUN-18 13:34:00 to 17-JUN-18 13:34:00 (MST-7)
Location: BIG SPGS
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Healthy trees completely uprooted at this location.

Thunderstorm Wind in DEUEL, NEBRASKA
From 17-JUN-18 13:35:00 to 17-JUN-18 13:35:00 (MST-7)
Location: CHAPPELL
Magnitude: 70.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts estimated at 80 MPH flipped a camper along Interstate 80 near mile marker 92.

Thunderstorm Wind in DEUEL, NEBRASKA
From 17-JUN-18 13:54:00 to 17-JUN-18 13:54:00 (MST-7)
Location: BIG SPGS
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm wind gusts estimated at 60 MPH, blew shingles off of a roof at this location.

Thunderstorm Wind in DEUEL, NEBRASKA
From 17-JUN-18 13:56:00 to 17-JUN-18 13:56:00 (MST-7)
Location: BIG SPGS
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Power lines and 6 inch diameter tree limbs reported down at this location. Winds estimated at 60 MPH.

Thunderstorm Wind in KEITH, NEBRASKA
From 17-JUN-18 14:00:00 to 17-JUN-18 14:00:00 (MST-7)
Location: BRULE
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Power lines reported down at this location.  Winds estimated at 60 MPH.

Thunderstorm Wind in MCPHERSON, NEBRASKA
From 17-JUN-18 16:16:00 to 17-JUN-18 16:16:00 (CST-6)
Location: TRYON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Two inch diameter tree limbs reported down at this location.

Thunderstorm Wind in LOGAN, NEBRASKA
From 17-JUN-18 16:45:00 to 17-JUN-18 16:45:00 (CST-6)
Location: STAPLETON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Six to 8 inch diameter tree limbs reported down at this location. Winds estimated at 70 MPH.

Thunderstorm Wind in DEUEL, NEBRASKA
From 17-JUN-18 13:34:00 to 17-JUN-18 13:34:00 (MST-7)
Location: BIG SPGS
Magnitude: 71.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Wind gust measured on a Davis Weather Station. Gust duration estimated at 4 minutes.