On May 30, 2012 a cold front moved through the central Plains causing widespread thunderstorm activity. The early mode of the storms was a supercellular/multicellular mode with large hail and damaging winds, but by late evening they congealed into a squall line, with damaging winds being the primary threat.

Hail in LYON, KANSAS
From 29-MAY-12 21:41:00 to 29-MAY-12 21:41:00 (CST-6)
Location: OLPE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in FRANKLIN, KANSAS
From 29-MAY-12 22:51:00 to 29-MAY-12 22:51:00 (CST-6)
Location: OTTAWA
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WABAUNSEE, KANSAS
From 29-MAY-12 22:43:00 to 29-MAY-12 22:53:00 (CST-6)
Location: ALTA VISTA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The hail fell for 10 minutes.

Hail in WABAUNSEE, KANSAS
From 29-MAY-12 23:08:00 to 29-MAY-12 23:08:00 (CST-6)
Location: ALTA VISTA
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in OSAGE, KANSAS
From 29-MAY-12 23:14:00 to 29-MAY-12 23:14:00 (CST-6)
Location: CARBONDALE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in OSAGE, KANSAS
From 29-MAY-12 23:17:00 to 29-MAY-12 23:21:00 (CST-6)
Location: CARBONDALE
Magnitude: 1.50 
Reported by: NWS Employee

Hail in WABAUNSEE, KANSAS
From 29-MAY-12 23:19:00 to 29-MAY-12 23:21:00 (CST-6)
Location: HESSDALE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in SHAWNEE, KANSAS
From 29-MAY-12 23:52:00 to 29-MAY-12 23:55:00 (CST-6)
Location: AUBURN
Magnitude: 1.50 
Reported by: Trained Spotter

Hail in SHAWNEE, KANSAS
From 29-MAY-12 23:54:00 to 29-MAY-12 23:56:00 (CST-6)
Location: AUBURN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in CLOUD, KANSAS
From 30-MAY-12 15:50:00 to 30-MAY-12 15:54:00 (CST-6)
Location: MACYVILLE
Magnitude: 56.00 EG
Reported by: Trained Spotter

A trained spotter near Glasco reported a 65 mph wind gust.

Hail in CLOUD, KANSAS
From 30-MAY-12 15:53:00 to 30-MAY-12 15:55:00 (CST-6)
Location: MACYVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in OTTAWA, KANSAS
From 30-MAY-12 16:23:00 to 30-MAY-12 16:23:00 (CST-6)
Location: ADA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in RILEY, KANSAS
From 30-MAY-12 17:05:00 to 30-MAY-12 17:09:00 (CST-6)
Location: WINKLER
Magnitude: 52.00 EG
Reported by: COOP Observer

A COOP observer reported a 60 mph wind.

Thunderstorm Wind in POTTAWATOMIE, KANSAS
From 30-MAY-12 17:15:00 to 30-MAY-12 17:55:00 (CST-6)
Location: OLSBURG
Magnitude: 52.00 EG
Reported by: Trained Spotter

Trained spotters from across Pottawatomie County reported 60 to 65 mph wind gusts. The only reported damage was in Wamego where a few 6 inch tree limbs broke.

Thunderstorm Wind in OTTAWA, KANSAS
From 30-MAY-12 16:18:00 to 30-MAY-12 16:22:00 (CST-6)
Location: ADA
Magnitude: 56.00 EG
Reported by: Public

Winds of 65 to 70 mph were estimated. Some crop damage was reported, but no hail size was available.

Thunderstorm Wind in SHAWNEE, KANSAS
From 30-MAY-12 18:52:00 to 30-MAY-12 18:56:00 (CST-6)
Location: KIRO
Magnitude: 56.00 EG
Reported by: Broadcast Media

A framed building under construction was blown completely to the ground. This was a delayed report from broadcast media, and the time was estimated from radar.

Thunderstorm Wind in SHAWNEE, KANSAS
From 30-MAY-12 18:45:00 to 30-MAY-12 18:49:00 (CST-6)
Location: WILLARD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a 60 mph wind gust.

Hail in WABAUNSEE, KANSAS
From 29-MAY-12 22:58:00 to 29-MAY-12 23:03:00 (CST-6)
Location: ALTA VISTA
Magnitude: 1.75 
Reported by: Trained Spotter

Thunderstorm Wind in SHAWNEE, KANSAS
From 30-MAY-12 19:06:00 to 30-MAY-12 19:10:00 (CST-6)
Location: WILLARD
Magnitude: 61.00 EG
Reported by: Broadcast Media

Broadcast media and Emergency Managers in Shawnee County reported several 60 to 70 mph wind gusts. Power outages were reported from Willard, Rossville, Silver Lake, and north Topeka.