For the second consecutive late afternoon and evening, a complex of severe thunderstorms rolled across parts of North Central Kansas on this Sunday, resulting in several reports of damaging winds, and even an isolated, brief tornado. Again, these storms focused almost directly along a nearly stationary, east-west surface front stretched all the way across Northern Kansas. The initial storm development took place across Northwest Kansas at mid-afternoon, as a subtle mid level shortwave ejected into the region from a large-scale trough anchored over the western United States.  As storms spread east into North Central Kansas in the form of a squall line, the synoptic environment was very supportive of severe weather, featuring deep-layer wind shear of 40-50 knots, and MLCAPE values around 4500 J/kg. Over the course of about two hours, there were numerous reports of 60-70 MPH wind gusts, and an estimated 75 MPH gust in Jewell County. Near the Smith and Jewell County line near Esbon, a brief EF0 tornado was reported in association with a bookend vortex that developed on the north side of a bowing segment in the squall line. While not widespread, there were a few reports of hail up to quarter size as well.

Thunderstorm Wind in PHILLIPS, KANSAS
From 20-JUN-10 17:20:00 to 20-JUN-10 17:29:00 (CST-6)
Location: KIRWIN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Wind gusts estimated at 60 mph.

Thunderstorm Wind in OSBORNE, KANSAS
From 20-JUN-10 17:58:00 to 20-JUN-10 17:58:00 (CST-6)
Location: DOWNS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Wind gusts estimated at 60 mph.

Thunderstorm Wind in SMITH, KANSAS
From 20-JUN-10 18:03:00 to 20-JUN-10 18:03:00 (CST-6)
Location: SMITH CENTER ARPT
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Thunderstorm Wind in SMITH, KANSAS
From 20-JUN-10 18:15:00 to 20-JUN-10 18:15:00 (CST-6)
Location: LEBANON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Wind gusts estimated at 70 mph.

Thunderstorm Wind in JEWELL, KANSAS
From 20-JUN-10 18:32:00 to 20-JUN-10 18:34:00 (CST-6)
Location: BURR OAK
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A couple of tree limbs of 14 to 16 inches in diamter were blown down by wind gusts estimated at 75 mph.

Thunderstorm Wind in JEWELL, KANSAS
From 20-JUN-10 18:49:00 to 20-JUN-10 18:49:00 (CST-6)
Location: RANDALL
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Numerous tree limbs of 6 inches in diameter blown down, one small shed was destroyed.

Thunderstorm Wind in JEWELL, KANSAS
From 20-JUN-10 18:50:00 to 20-JUN-10 18:50:00 (CST-6)
Location: WEBBER
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Wind gusts estimated at 65 mph.

Thunderstorm Wind in JEWELL, KANSAS
From 20-JUN-10 18:55:00 to 20-JUN-10 18:55:00 (CST-6)
Location: RANDALL
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tree approximately 9 inches in diameter was snapped.

Hail in PHILLIPS, KANSAS
From 20-JUN-10 16:51:00 to 20-JUN-10 16:51:00 (CST-6)
Location: SPEED
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ROOKS, KANSAS
From 20-JUN-10 17:02:00 to 20-JUN-10 17:02:00 (CST-6)
Location: DAMAR
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in ROOKS, KANSAS
From 20-JUN-10 17:02:00 to 20-JUN-10 17:02:00 (CST-6)
Location: WEBSTER
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Wind gusts estimated at 70 mph.

Tornado in JEWELL, KANSAS
From 20-JUN-10 18:20:00 to 20-JUN-10 18:20:00 (CST-6)
Location: ESBON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm chaser reported a brief touchdown southeast of Esbon.

Thunderstorm Wind in ROOKS, KANSAS
From 20-JUN-10 17:15:00 to 20-JUN-10 17:15:00 (CST-6)
Location: STOCKTON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Tree limbs ranging from 4 to 8 inches in diameter were blown down.