An upper level disturbance over northern Kansas, lifted into Nebraska, during the afternoon and evening hours of May 21, 2011. This disturbance, combined with moisture convergence and diurnal heating, allowed thunderstorms to develop. The thunderstorms moved northeast into northwestern Missouri. There were numerous reports of hail and one report of a tornado.

Hail in CLINTON, MISSOURI
From 21-MAY-11 19:12:00 to 21-MAY-11 19:12:00 (CST-6)
Location: PERRIN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in BUCHANAN, MISSOURI
From 21-MAY-11 19:17:00 to 21-MAY-11 19:17:00 (CST-6)
Location: SAXTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in DE KALB, MISSOURI
From 21-MAY-11 19:15:00 to 21-MAY-11 19:15:00 (CST-6)
Location: OSBORN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in BUCHANAN, MISSOURI
From 21-MAY-11 19:30:00 to 21-MAY-11 19:30:00 (CST-6)
Location: SAXTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HARRISON, MISSOURI
From 21-MAY-11 19:36:00 to 21-MAY-11 19:36:00 (CST-6)
Location: HATFIELD
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in DAVIESS, MISSOURI
From 21-MAY-11 19:45:00 to 21-MAY-11 19:45:00 (CST-6)
Location: GALLATIN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in BUCHANAN, MISSOURI
From 21-MAY-11 19:07:00 to 21-MAY-11 19:07:00 (CST-6)
Location: HURLINGEN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in GRUNDY, MISSOURI
From 21-MAY-11 20:07:00 to 21-MAY-11 20:07:00 (CST-6)
Location: COBURN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in GRUNDY, MISSOURI
From 21-MAY-11 20:13:00 to 21-MAY-11 20:13:00 (CST-6)
Location: TRENTON ARPT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in BUCHANAN, MISSOURI
From 21-MAY-11 20:14:00 to 21-MAY-11 20:14:00 (CST-6)
Location: FAUCETT FARRIS ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GRUNDY, MISSOURI
From 21-MAY-11 21:01:00 to 21-MAY-11 21:01:00 (CST-6)
Location: DUNLAP
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in GRUNDY, MISSOURI
From 21-MAY-11 20:55:00 to 21-MAY-11 20:55:00 (CST-6)
Location: DUNLAP
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in GRUNDY, MISSOURI
From 21-MAY-11 21:01:00 to 21-MAY-11 21:01:00 (CST-6)
Location: GALT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in PLATTE, MISSOURI
From 21-MAY-11 22:03:00 to 21-MAY-11 22:03:00 (CST-6)
Location: PLATTE WOODS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in ANDREW, MISSOURI
From 21-MAY-11 18:30:00 to 21-MAY-11 18:33:00 (CST-6)
Location: FILLMORE
Tornado F-scale: EF0
Property damage: 7.00K
Crop damage: 0.00K
Reported by: Storm Chaser

At 1830CST, an EF0 tornado touched down nearly 4 miles southeast of Fillmore. The tornado moved around a mile northeast, before lifting at 1833CST, about 4 miles east of Fillmore. Minor damage was reported to three homes. Tree damage was also reported.

Thunderstorm Wind in GRUNDY, MISSOURI
From 21-MAY-11 20:07:00 to 21-MAY-11 20:07:00 (CST-6)
Location: COBURN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm wind gusts were estimated up to 60 mph.

Thunderstorm Wind in DAVIESS, MISSOURI
From 21-MAY-11 20:45:00 to 21-MAY-11 20:45:00 (CST-6)
Location: GALLATIN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Thunderstorm wind gusts were estimated up to 60 mph.

Thunderstorm Wind in PLATTE, MISSOURI
From 21-MAY-11 20:07:00 to 21-MAY-11 20:07:00 (CST-6)
Location: DEARBORN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree limbs reported on the ground, with thunderstorm wind gusts estimated up to 60 mph.

Hail in PLATTE, MISSOURI
From 21-MAY-11 21:03:00 to 21-MAY-11 21:03:00 (CST-6)
Location: PLATTE WOODS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LIVINGSTON, MISSOURI
From 21-MAY-11 22:27:00 to 21-MAY-11 22:27:00 (CST-6)
Location: CHILLICOTHE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ANDREW, MISSOURI
From 21-MAY-11 18:15:00 to 21-MAY-11 18:15:00 (CST-6)
Location: ROSENDALE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ANDREW, MISSOURI
From 21-MAY-11 18:15:00 to 21-MAY-11 18:15:00 (CST-6)
Location: ROSENDALE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BUCHANAN, MISSOURI
From 21-MAY-11 20:58:00 to 21-MAY-11 20:58:00 (CST-6)
Location: SAN ANTONIO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LINN, MISSOURI
From 21-MAY-11 22:51:00 to 21-MAY-11 22:51:00 (CST-6)
Location: MEADVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in DAVIESS, MISSOURI
From 21-MAY-11 19:47:00 to 21-MAY-11 19:47:00 (CST-6)
Location: GALLATIN
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm wind gusts were estimated up to 65 mph. Small tree limbs were broken.

Hail in ATCHISON, MISSOURI
From 21-MAY-11 17:40:00 to 21-MAY-11 17:40:00 (CST-6)
Location: LINDEN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BUCHANAN, MISSOURI
From 21-MAY-11 18:11:00 to 21-MAY-11 18:11:00 (CST-6)
Location: AGENCY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BUCHANAN, MISSOURI
From 21-MAY-11 18:12:00 to 21-MAY-11 18:12:00 (CST-6)
Location: AGENCY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in NODAWAY, MISSOURI
From 21-MAY-11 18:27:00 to 21-MAY-11 18:27:00 (CST-6)
Location: WILCOX
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in ANDREW, MISSOURI
From 21-MAY-11 18:43:00 to 21-MAY-11 18:43:00 (CST-6)
Location: FILLMORE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in ANDREW, MISSOURI
From 21-MAY-11 18:47:00 to 21-MAY-11 18:47:00 (CST-6)
Location: BOLCKOW
Magnitude: 61.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A power pole was blown over at Highway 71 and Route Y. Thunderstorm wind gusts were estimated up to 70 mph.