During the late afternoon on July 9th, storms developed off the Rockies and moved southeast across Northern Colorado and Southern Wyoming. As the storms moved southeast, they clustered together and produced outflow boundaries for more storms to develop along. These storm clusters continued to move southeast into Northwest Kansas, producing thunderstorm wind gusts up to 90 mph. These strong winds were able to knock down trees, snap a large wooden swing set in half, and blow out a Sonic Restaurant sign.

Thunderstorm Wind in CHEYENNE, KANSAS
From 09-JUL-21 20:10:00 to 09-JUL-21 20:10:00 (CST-6)
Location: ST FRANCIS ARPT
Magnitude: 53.00 MG
Reported by: Mesonet

Kansas State Mesonet site KCNK1 measured a 61 mph wind gust as a passing storm produced strong winds.

Thunderstorm Wind in GOVE, KANSAS
From 09-JUL-21 21:55:00 to 09-JUL-21 21:55:00 (CST-6)
Location: GOVE
Magnitude: 51.00 MG
Reported by: Mesonet

Kansas State mesonet recorded a 59 mph wind gust.

Thunderstorm Wind in WICHITA, KANSAS
From 09-JUL-21 22:10:00 to 09-JUL-21 22:10:00 (CST-6)
Location: LEOTI
Magnitude: 54.00 MG
Reported by: Mesonet

Kansas State mesonet station KWHK1 measured a 62 mph wind gust.

Thunderstorm Wind in SHERMAN, KANSAS
From 09-JUL-21 21:11:00 to 09-JUL-21 21:13:00 (MST-7)
Location: GOODLAND ARPT
Magnitude: 51.00 MG
Reported by: ASOS

ASOS Station KGLD recorded a 59 mph wind gust associated with outflow behind the storms for a duration of two minutes.

Thunderstorm Wind in SHERMAN, KANSAS
From 09-JUL-21 21:15:00 to 09-JUL-21 21:15:00 (MST-7)
Location: GOODLAND
Magnitude: 78.00 EG
Property damage: 1.00K
Reported by: NWS Employee

With strong winds reported with outflow behind the storms, a large tree was uprooted.

Thunderstorm Wind in THOMAS, KANSAS
From 09-JUL-21 22:15:00 to 09-JUL-21 22:15:00 (CST-6)
Location: BROWNVILLE
Magnitude: 78.00 EG
Property damage: 1.50K
Crop damage: 0.50K
Reported by: Public

After the storms moved through western Thomas County, winds strengthened enough to snap a large redwood swing-set in half and toss a hay bale on top of a parked vehicle on the property.

Thunderstorm Wind in GOVE, KANSAS
From 09-JUL-21 23:35:00 to 09-JUL-21 23:35:00 (CST-6)
Location: GOVE
Magnitude: 58.00 MG
Reported by: Mesonet

Kansas State mesonet OVEK1 recorded a 67 mph wind gust on the back edge of the storms as they exited Gove County.

Thunderstorm Wind in NORTON, KANSAS
From 10-JUL-21 01:35:00 to 10-JUL-21 01:35:00 (CST-6)
Location: NORTON MUNI ARPT
Magnitude: 53.00 MG
Reported by: AWOS

The Norton AWOS station recorded a thunderstorm wind gust of 61 mph.

Thunderstorm Wind in NORTON, KANSAS
From 10-JUL-21 01:30:00 to 10-JUL-21 01:30:00 (CST-6)
Location: ORONOQUE
Magnitude: 53.00 MG
Reported by: Mesonet

Kansas State mesonet NRRK1 measured a thunderstorm wind gust of 61 mph.

Thunderstorm Wind in NORTON, KANSAS
From 10-JUL-21 01:35:00 to 10-JUL-21 01:35:00 (CST-6)
Location: NORTON
Magnitude: 65.00 EG
Property damage: 25.00K
Reported by: Trained Spotter

Strong thunderstorm wind gusts estimated at 75 mph blew out the display sign at the Sonic Restaurant in Norton. The sign was approximately 15 ft wide by 20 ft across and was laying across all lanes of Highway 36. Smaller parts to the sign were scattered across the highway.

Thunderstorm Wind in NORTON, KANSAS
From 10-JUL-21 01:35:00 to 10-JUL-21 01:35:00 (CST-6)
Location: NORTON
Magnitude: 52.00 EG
Property damage: 0.30K
Reported by: Trained Spotter

Strong thunderstorm wind gusts broke off several 8-10 ft long branches with diameters of 0.75 to 1 inch.

Thunderstorm Wind in GRAHAM, KANSAS
From 10-JUL-21 01:44:00 to 10-JUL-21 01:44:00 (CST-6)
Location: (HLC)HILL CITY MUNI
Magnitude: 50.00 MG
Reported by: ASOS

Outflow from an approaching thunderstorm produced a 58 mph wind gust.

Thunderstorm Wind in LOGAN, KANSAS
From 10-JUL-21 01:55:00 to 10-JUL-21 01:55:00 (CST-6)
Location: OAKLEY MUNI ARPT
Magnitude: 52.00 MG
Reported by: AWOS

Oakley Airport AWOS station KOEL recorded a 60 mph wind gust as an outflow boundary moved south over the location.

Thunderstorm Wind in LOGAN, KANSAS
From 10-JUL-21 02:15:00 to 10-JUL-21 02:15:00 (CST-6)
Location: MC ALLASTER
Magnitude: 50.00 MG
Reported by: Mesonet

Mesonet station UP840 measured a 58 mph wind gust as an outflow boundary moved over the location.

Thunderstorm Wind in GRAHAM, KANSAS
From 10-JUL-21 02:16:00 to 10-JUL-21 02:16:00 (CST-6)
Location: (HLC)HILL CITY MUNI
Magnitude: 51.00 MG
Reported by: ASOS

The Hill City ASOS station KHLC measured a 59 mph wind gust in the outflow behind the storms as they moved across North-Central Kansas.