Severe thunderstorms produced large hail up to baseball size, along with damaging thunderstorm winds gusts to nearly 80 mph over Logan, Phillips, and Sedgwick counties.  A brief tornado was also observed.  The large hail and intense winds caused widespread property and crop damage.  Downed trees and power lines caused extensive power outages.  An assisted living facility in Julesburg was damaged.  Along Interstate 76, the strong winds knocked a semi-trailer on its side.

Thunderstorm Wind in PHILLIPS, COLORADO
From 28-JUL-18 19:45:00 to 28-JUL-18 19:45:00 (MST-7)
Location: AMHERST
Magnitude: 51.00 MG
Reported by: Mesonet

Hail in LOGAN, COLORADO
From 28-JUL-18 18:08:00 to 28-JUL-18 18:08:00 (MST-7)
Location: STERLING ARPT
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in LOGAN, COLORADO
From 28-JUL-18 17:53:00 to 28-JUL-18 17:53:00 (MST-7)
Location: STERLING ARPT
Magnitude: 2.75 
Reported by: Trained Spotter

Hail in LOGAN, COLORADO
From 28-JUL-18 18:13:00 to 28-JUL-18 18:13:00 (MST-7)
Location: STERLING ARPT
Magnitude: 1.75 
Reported by: Trained Spotter

Hail in LOGAN, COLORADO
From 28-JUL-18 18:13:00 to 28-JUL-18 18:13:00 (MST-7)
Location: STERLING
Magnitude: 1.50 
Reported by: Trained Spotter

Hail in SEDGWICK, COLORADO
From 28-JUL-18 19:09:00 to 28-JUL-18 19:09:00 (MST-7)
Location: JULESBURG
Magnitude: 2.75 
Reported by: Trained Spotter

Baseball size hail shattered a windshield.

Hail in SEDGWICK, COLORADO
From 28-JUL-18 19:16:00 to 28-JUL-18 19:16:00 (MST-7)
Location: JULESBURG
Magnitude: 2.50 
Reported by: Trained Spotter

Hail in PHILLIPS, COLORADO
From 28-JUL-18 19:35:00 to 28-JUL-18 19:35:00 (MST-7)
Location: AMHERST
Magnitude: 2.75 
Reported by: Trained Spotter

Hail in PHILLIPS, COLORADO
From 28-JUL-18 19:36:00 to 28-JUL-18 19:36:00 (MST-7)
Location: AMHERST
Magnitude: 2.50 
Reported by: Trained Spotter

Large hail the size of baseballs broke windshields and damaged trees.

Tornado in LOGAN, COLORADO
From 28-JUL-18 18:01:00 to 28-JUL-18 18:02:00 (MST-7)
Location: STERLING ARPT
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tornado touched down briefly in an open field.  No damage was observed.

Thunderstorm Wind in SEDGWICK, COLORADO
From 28-JUL-18 19:04:00 to 28-JUL-18 19:04:00 (MST-7)
Location: JULESBURG
Magnitude: 61.00 EG
Reported by: Law Enforcement

Intense thunderstorm winds blew down power lines.  In addition, a trailer was blown on its side near I-76 and the stateline.

Thunderstorm Wind in SEDGWICK, COLORADO
From 28-JUL-18 19:05:00 to 28-JUL-18 19:05:00 (MST-7)
Location: JULESBURG
Magnitude: 61.00 EG
Reported by: Law Enforcement

Strong winds and large hail caused extensive damage to an assisted living facility.

Thunderstorm Wind in LOGAN, COLORADO
From 28-JUL-18 18:13:00 to 28-JUL-18 18:13:00 (MST-7)
Location: STERLING ARPT
Magnitude: 55.00 MG
Reported by: Trained Spotter

Thunderstorm Wind in SEDGWICK, COLORADO
From 28-JUL-18 19:09:00 to 28-JUL-18 19:09:00 (MST-7)
Location: JULESBURG
Magnitude: 67.00 MG
Reported by: Trained Spotter

Hail in LOGAN, COLORADO
From 28-JUL-18 18:17:00 to 28-JUL-18 18:17:00 (MST-7)
Location: STERLING
Magnitude: 1.75 
Reported by: Trained Spotter

Hail in SEDGWICK, COLORADO
From 28-JUL-18 19:01:00 to 28-JUL-18 19:01:00 (MST-7)
Location: JULESBURG
Magnitude: 2.00 
Reported by: Trained Spotter

The large hail broke the windows on one side of the house.

Hail in LOGAN, COLORADO
From 28-JUL-18 18:10:00 to 28-JUL-18 18:10:00 (MST-7)
Location: STERLING
Magnitude: 1.50 
Reported by: Trained Spotter

Extensive crop damage was observed in the area between Sterling and Iliff.

Hail in SEDGWICK, COLORADO
From 28-JUL-18 19:04:00 to 28-JUL-18 19:04:00 (MST-7)
Location: JULESBURG
Magnitude: 1.25 
Reported by: Public