On July 18th, a southward-moving outflow boundary that was caused by thunderstorms in Nebraska from the previous night moved into the northwestern Kansas. This boundary allowed thunderstorms to develop along it in northwestern Kansas during the morning and afternoon hours. These thunderstorms produced hail up to a hen egg in size as well as thunderstorm wind gusts up to an estimated 70 mph that did damage to property.

Hail in SHERMAN, KANSAS
From 18-JUL-21 11:52:00 to 18-JUL-21 11:52:00 (MST-7)
Location: GOODLAND
Magnitude: 2.00 
Reported by: NWS Employee

Off duty NWS employee reported hen egg sized hail at location.

Hail in SHERMAN, KANSAS
From 18-JUL-21 11:53:00 to 18-JUL-21 11:53:00 (MST-7)
Location: GOODLAND
Magnitude: 1.75 
Reported by: NWS Employee

Off duty NWS employee reported golf ball sized hail at location.

Hail in SHERMAN, KANSAS
From 18-JUL-21 11:59:00 to 18-JUL-21 11:59:00 (MST-7)
Location: GOODLAND
Magnitude: 1.25 
Reported by: Public

Report received of half dollar sized hail at location via mPing.

Hail in SHERMAN, KANSAS
From 18-JUL-21 12:08:00 to 18-JUL-21 12:08:00 (MST-7)
Location: GOODLAND
Magnitude: 1.75 
Reported by: Social Media

Report received of golf ball sized hail falling at location via social media.

Hail in SHERMAN, KANSAS
From 18-JUL-21 12:17:00 to 18-JUL-21 12:17:00 (MST-7)
Location: GOODLAND ARPT
Magnitude: 1.60 
Reported by: Public

Report received of hail measured at 1.6 inches at location via photo.

Hail in GREELEY, KANSAS
From 18-JUL-21 13:10:00 to 18-JUL-21 13:25:00 (MST-7)
Location: HORACE
Magnitude: 1.00 
Reported by: Public

Report received of sporadic dime to quarter sized hail at location.

Thunderstorm Wind in WALLACE, KANSAS
From 18-JUL-21 12:15:00 to 18-JUL-21 12:15:00 (MST-7)
Location: SHARON SPGS ARPT
Magnitude: 61.00 EG
Reported by: Public

Delayed report received of an estimated 70 mph thunderstorm wind gust that caused tree limbs to be snapped off of trees on the property. Time is radar estimated.

Hail in CHEYENNE, KANSAS
From 18-JUL-21 15:10:00 to 18-JUL-21 15:10:00 (CST-6)
Location: WHEELER
Magnitude: 1.25 
Reported by: Trained Spotter

Report received of hail ranging from a half inch to a half dollar in size at location.

Hail in CHEYENNE, KANSAS
From 18-JUL-21 15:25:00 to 18-JUL-21 15:25:00 (CST-6)
Location: WHEELER
Magnitude: 1.00 
Reported by: Trained Spotter

Report received of hail ranging from peas to quarters in size at location.

Thunderstorm Wind in DECATUR, KANSAS
From 18-JUL-21 10:00:00 to 18-JUL-21 10:00:00 (CST-6)
Location: NORCATUR
Magnitude: 61.00 EG
Reported by: Trained Spotter

Thunderstorm wind gust reported strong enough to blow steel lawn furniture 6-7 ft. Wind gust also snapped off an 8 ft. long branch from a tree and threw it across from across the road to the house. Spotter estimated wind gust speed to be around 70 mph with the spotter having to hold the door shut to prevent it from opening. Wind gusts also caused rain to come indoors horizontally through a keyhole of a door briefly.

Hail in NORTON, KANSAS
From 18-JUL-21 10:05:00 to 18-JUL-21 10:05:00 (CST-6)
Location: CLAYTON
Magnitude: 0.75 
Reported by: Public

Report received of hail from pea sized up to penny sized at location. Time is radar estimated.

Hail in SHERMAN, KANSAS
From 18-JUL-21 10:45:00 to 18-JUL-21 11:46:00 (MST-7)
Location: KANORADO
Magnitude: 1.00 
Reported by: Trained Spotter

Report received of sporadic pea to quarter sized hail that lasted about an hour at location. Pictures of nickel sized hailstone as well a measured 1 inch hailstone also received at location via social media.

Hail in SHERMAN, KANSAS
From 18-JUL-21 11:48:00 to 18-JUL-21 11:48:00 (MST-7)
Location: GOODLAND
Magnitude: 1.00 
Reported by: Public

Report received of quarter sized hail at location.

Hail in SHERMAN, KANSAS
From 18-JUL-21 11:51:00 to 18-JUL-21 11:55:00 (MST-7)
Location: GOODLAND
Magnitude: 1.25 
Reported by: Public

Report received of half dollar sized hail at location.

Hail in SHERMAN, KANSAS
From 18-JUL-21 11:52:00 to 18-JUL-21 11:57:00 (MST-7)
Location: GOODLAND
Magnitude: 1.25 
Reported by: Public

Reports received of half dollar sized hail followed by penny sized hail at location via mPing.