On the afternoon of September 18, 2010 very strong thunderstorms formed along two colliding boundaries in northeast Kansas. At least two of these storms morphed into supercells and dropped hail the size of baseballs and larger on portions of Jefferson County. Elsewhere, these storms produced hail up to the size of golf balls. A few isolated reports of strong damaging winds were reported, however most of the severe weather reports from September 18th were large hail reports.

Flash Flood in JEFFERSON, KANSAS
From 18-SEP-10 17:00:00 to 18-SEP-10 18:00:00 (CST-6)
Location: VALLEY FALLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported water over the road at K4 and 138th Road.

Hail in JEFFERSON, KANSAS
From 18-SEP-10 15:01:00 to 18-SEP-10 15:01:00 (CST-6)
Location: OZAWKIE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JEFFERSON, KANSAS
From 18-SEP-10 15:04:00 to 18-SEP-10 15:07:00 (CST-6)
Location: WILLIAMSTOWN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JEFFERSON, KANSAS
From 18-SEP-10 15:17:00 to 18-SEP-10 15:20:00 (CST-6)
Location: MC LOUTH ARPT
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail up to the size of golf balls was reported at the intersection of 54th Road and Wellman Road.

Hail in JEFFERSON, KANSAS
From 18-SEP-10 15:22:00 to 18-SEP-10 15:27:00 (CST-6)
Location: MC LOUTH ARPT
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail up to 2 inches was falling at the intersection of 54th Road and Wellman Road.

Funnel Cloud in JEFFERSON, KANSAS
From 18-SEP-10 15:19:00 to 18-SEP-10 15:20:00 (CST-6)
Location: ROCK CREEK
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The Jefferson County emergency manager reported a funnel cloud just north of the intersection of K4 and Highway 92, near Ozawkie.

Hail in JACKSON, KANSAS
From 18-SEP-10 14:30:00 to 18-SEP-10 14:30:00 (CST-6)
Location: MAYETTA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in JACKSON, KANSAS
From 18-SEP-10 14:30:00 to 18-SEP-10 14:30:00 (CST-6)
Location: MAYETTA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in JEFFERSON, KANSAS
From 18-SEP-10 15:55:00 to 18-SEP-10 15:55:00 (CST-6)
Location: WILLIAMSTOWN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JEFFERSON, KANSAS
From 18-SEP-10 16:02:00 to 18-SEP-10 16:02:00 (CST-6)
Location: MC LOUTH ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JEFFERSON, KANSAS
From 18-SEP-10 16:02:00 to 18-SEP-10 16:02:00 (CST-6)
Location: OSKALOOSA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JEFFERSON, KANSAS
From 18-SEP-10 16:11:00 to 18-SEP-10 16:16:00 (CST-6)
Location: MC LOUTH ARPT
Magnitude: 3.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

A storm chaser reported hail to the size of 3.5 inches near Oskaloosa.

Hail in JEFFERSON, KANSAS
From 18-SEP-10 16:16:00 to 18-SEP-10 16:16:00 (CST-6)
Location: MC LOUTH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JEFFERSON, KANSAS
From 18-SEP-10 15:26:00 to 18-SEP-10 15:26:00 (CST-6)
Location: MC LOUTH ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JEFFERSON, KANSAS
From 18-SEP-10 15:34:00 to 18-SEP-10 15:34:00 (CST-6)
Location: OZAWKIE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JEFFERSON, KANSAS
From 18-SEP-10 15:35:00 to 18-SEP-10 15:38:00 (CST-6)
Location: MC LOUTH ARPT
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JEFFERSON, KANSAS
From 18-SEP-10 14:40:00 to 18-SEP-10 14:43:00 (CST-6)
Location: THOMPSONVILLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JEFFERSON, KANSAS
From 18-SEP-10 14:55:00 to 18-SEP-10 15:00:00 (CST-6)
Location: PERRY
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in JEFFERSON, KANSAS
From 18-SEP-10 15:47:00 to 18-SEP-10 15:47:00 (CST-6)
Location: PERRY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JEFFERSON, KANSAS
From 18-SEP-10 22:14:00 to 18-SEP-10 22:19:00 (CST-6)
Location: MC LOUTH
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JEFFERSON, KANSAS
From 18-SEP-10 16:13:00 to 18-SEP-10 16:18:00 (CST-6)
Location: MC LOUTH ARPT
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JEFFERSON, KANSAS
From 18-SEP-10 17:13:00 to 18-SEP-10 17:13:00 (CST-6)
Location: WILLIAMSTOWN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JEFFERSON, KANSAS
From 18-SEP-10 16:40:00 to 18-SEP-10 16:40:00 (CST-6)
Location: BUCK CREEK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

One inch hail was reported near 21st Road and Union Road.

Hail in JEFFERSON, KANSAS
From 18-SEP-10 17:30:00 to 18-SEP-10 17:30:00 (CST-6)
Location: BUCK CREEK
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JEFFERSON, KANSAS
From 18-SEP-10 17:36:00 to 18-SEP-10 17:36:00 (CST-6)
Location: BUCK CREEK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JEFFERSON, KANSAS
From 18-SEP-10 22:00:00 to 18-SEP-10 22:03:00 (CST-6)
Location: MC LOUTH
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail to the size of golf balls was reported in McLouth.

Hail in JEFFERSON, KANSAS
From 18-SEP-10 21:55:00 to 18-SEP-10 21:55:00 (CST-6)
Location: MC LOUTH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in JEFFERSON, KANSAS
From 18-SEP-10 21:57:00 to 18-SEP-10 21:57:00 (CST-6)
Location: MC LOUTH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JEFFERSON, KANSAS
From 18-SEP-10 15:41:00 to 18-SEP-10 15:41:00 (CST-6)
Location: BOYLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter