A significant episode of severe weather, featuring extremely large and destructive hail and a few brief tornadoes, impacted portions of northwest and north central Missouri during the late afternoon and evening hours on June 7th. The setup for the event featured a slow moving warm front that was draped from far northwest Missouri southeastward into central Missouri. This front had been reinforced by a complex of thunderstorms that had impacted northern Missouri during the overnight and early morning hours prior, allowing abundant low level moisture to become pooled along the front. Strong daytime heating along and south of the front sent temperatures into the middle and upper 80s. With strong instability and moisture in place by late afternoon, conditions were ripe for rapid thunderstorm development as an upper level disturbance moving through Kansas provided the lift necessary for thunderstorms. However, it was the strong turning and increase in winds with height (known as wind shear) that set the stage for severe storms, specifically supercells.
While these extremely photogenic storms thankfully were not damaging tornado producers, June 7th featured some of the most destructive hail ever observed across northern Missouri, with two separate storms producing softball and grapefruit size hail, leaving widespread destruction to trees, homes, and vehicles.

Hail in DE KALB, MISSOURI
From 07-JUN-09 18:46:00 to 07-JUN-09 18:46:00 (CST-6)
Location: UNION STAR
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HOLT, MISSOURI
From 07-JUN-09 17:50:00 to 07-JUN-09 17:50:00 (CST-6)
Location: OREGON
Magnitude: 3.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in LIVINGSTON, MISSOURI
From 07-JUN-09 22:49:00 to 07-JUN-09 22:49:00 (CST-6)
Location: CHULA
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds were estimated to gust to 75 mph.

Hail in RAY, MISSOURI
From 07-JUN-09 18:07:00 to 07-JUN-09 18:07:00 (CST-6)
Location: TINNEY GROVE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DAVIESS, MISSOURI
From 07-JUN-09 19:54:00 to 07-JUN-09 19:54:00 (CST-6)
Location: ALTAMONT
Magnitude: 2.75 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in DAVIESS, MISSOURI
From 07-JUN-09 20:07:00 to 07-JUN-09 20:07:00 (CST-6)
Location: GALLATIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in DAVIESS, MISSOURI
From 07-JUN-09 22:26:00 to 07-JUN-09 22:26:00 (CST-6)
Location: JAMESPORT
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A car was blown off Highway 6, by winds estimated at 80 mph.

Thunderstorm Wind in GRUNDY, MISSOURI
From 07-JUN-09 22:40:00 to 07-JUN-09 22:40:00 (CST-6)
Location: COBURN
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Winds were estimated to have gusted to 65 mph.

Hail in GRUNDY, MISSOURI
From 07-JUN-09 19:22:00 to 07-JUN-09 19:22:00 (CST-6)
Location: SPICKARD
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DE KALB, MISSOURI
From 07-JUN-09 19:47:00 to 07-JUN-09 19:47:00 (CST-6)
Location: WEATHERBY
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in CALDWELL, MISSOURI
From 07-JUN-09 21:44:00 to 07-JUN-09 21:45:00 (CST-6)
Location: KIDDER
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A brief EFO touchdown was observed in open country at 2144 CST. No damage was reported.

Thunderstorm Wind in CALDWELL, MISSOURI
From 07-JUN-09 21:46:00 to 07-JUN-09 21:46:00 (CST-6)
Location: KIDDER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two trees were reported down in the city park.

Hail in GRUNDY, MISSOURI
From 07-JUN-09 18:59:00 to 07-JUN-09 18:59:00 (CST-6)
Location: COBURN
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GENTRY, MISSOURI
From 07-JUN-09 19:06:00 to 07-JUN-09 19:06:00 (CST-6)
Location: KING CITY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in DAVIESS, MISSOURI
From 07-JUN-09 20:31:00 to 07-JUN-09 20:31:00 (CST-6)
Location: LOCK SPGS
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in GRUNDY, MISSOURI
From 07-JUN-09 20:53:00 to 07-JUN-09 20:53:00 (CST-6)
Location: TRENTON ARPT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in LIVINGSTON, MISSOURI
From 07-JUN-09 20:48:00 to 07-JUN-09 20:48:00 (CST-6)
Location: SPRING HILL
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in DE KALB, MISSOURI
From 07-JUN-09 19:13:00 to 07-JUN-09 19:14:00 (CST-6)
Location: AMITY
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

A brief EF0 tornado touchdown occurred in rural land at 1913 CST. Tree branches were snapped off.

Hail in GENTRY, MISSOURI
From 07-JUN-09 18:43:00 to 07-JUN-09 18:43:00 (CST-6)
Location: KING CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DAVIESS, MISSOURI
From 07-JUN-09 20:10:00 to 07-JUN-09 20:10:00 (CST-6)
Location: GALLATIN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in DAVIESS, MISSOURI
From 07-JUN-09 20:13:00 to 07-JUN-09 20:13:00 (CST-6)
Location: GALLATIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in GRUNDY, MISSOURI
From 07-JUN-09 20:53:00 to 07-JUN-09 20:53:00 (CST-6)
Location: LAREDO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in DE KALB, MISSOURI
From 07-JUN-09 21:24:00 to 07-JUN-09 21:24:00 (CST-6)
Location: OSBORN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flash Flood in DAVIESS, MISSOURI
From 07-JUN-09 22:28:00 to 08-JUN-09 04:28:00 (CST-6)
Location: GALLATIN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Highway 13 at the intersection of Richardson Street, was impassable due to high water.

Hail in HOLT, MISSOURI
From 07-JUN-09 17:27:00 to 07-JUN-09 17:27:00 (CST-6)
Location: FORTESCUE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HOLT, MISSOURI
From 07-JUN-09 17:54:00 to 07-JUN-09 17:54:00 (CST-6)
Location: OREGON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in ANDREW, MISSOURI
From 07-JUN-09 18:05:00 to 07-JUN-09 18:05:00 (CST-6)
Location: ROSENDALE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HOLT, MISSOURI
From 07-JUN-09 17:48:00 to 07-JUN-09 17:48:00 (CST-6)
Location: FOREST CITY
Magnitude: 3.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in CASS, MISSOURI
From 07-JUN-09 16:40:00 to 07-JUN-09 16:40:00 (CST-6)
Location: DREXEL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HOLT, MISSOURI
From 07-JUN-09 17:48:00 to 07-JUN-09 17:48:00 (CST-6)
Location: NEW PT
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in RAY, MISSOURI
From 07-JUN-09 17:54:00 to 07-JUN-09 17:54:00 (CST-6)
Location: RICHMOND
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in DE KALB, MISSOURI
From 07-JUN-09 19:27:00 to 07-JUN-09 19:28:00 (CST-6)
Location: WEATHERBY
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A brief EF0 tornado touchdown was reported in rural land at 1927 CST. No damage was reported.

Hail in HOLT, MISSOURI
From 07-JUN-09 17:38:00 to 07-JUN-09 17:38:00 (CST-6)
Location: FOREST CITY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in HOLT, MISSOURI
From 07-JUN-09 17:41:00 to 07-JUN-09 17:41:00 (CST-6)
Location: FOREST CITY
Magnitude: 3.00 
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HOLT, MISSOURI
From 07-JUN-09 17:48:00 to 07-JUN-09 17:48:00 (CST-6)
Location: OREGON
Magnitude: 4.25 
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DAVIESS, MISSOURI
From 07-JUN-09 20:03:00 to 07-JUN-09 20:13:00 (CST-6)
Location: ALTAMONT
Magnitude: 4.00 
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Grapefruit sized hail lasted 10 minutes, on the west shore of Lake Viking. One injury was reported from broken glass. Most homes suffered damage to roofs, windows, siding, and automobiles.

Hail in LAFAYETTE, MISSOURI
From 07-JUN-09 17:30:00 to 07-JUN-09 17:30:00 (CST-6)
Location: BATES CITY
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in CALDWELL, MISSOURI
From 07-JUN-09 21:46:00 to 07-JUN-09 21:46:00 (CST-6)
Location: KIDDER
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two trees were knocked down in the city park. One of the trees was broken in half.

Thunderstorm Wind in DAVIESS, MISSOURI
From 07-JUN-09 21:59:00 to 07-JUN-09 21:59:00 (CST-6)
Location: GALLATIN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds were reported by a trained spotter to have gusted to 60 mph.

Thunderstorm Wind in DAVIESS, MISSOURI
From 07-JUN-09 22:17:00 to 07-JUN-09 22:17:00 (CST-6)
Location: GALLATIN
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds were reported to have gusted to 70 mph.

Hail in CLINTON, MISSOURI
From 07-JUN-09 20:53:00 to 07-JUN-09 20:53:00 (CST-6)
Location: PLATTSBURG ARPK ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in DAVIESS, MISSOURI
From 07-JUN-09 18:39:00 to 07-JUN-09 18:39:00 (CST-6)
Location: LOCK SPGS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CALDWELL, MISSOURI
From 07-JUN-09 21:54:00 to 07-JUN-09 21:54:00 (CST-6)
Location: MIRABILE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in CASS, MISSOURI
From 07-JUN-09 16:58:00 to 07-JUN-09 16:58:00 (CST-6)
Location: DREXEL
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CASS, MISSOURI
From 07-JUN-09 17:08:00 to 07-JUN-09 17:08:00 (CST-6)
Location: HARRISONVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in GRUNDY, MISSOURI
From 07-JUN-09 22:44:00 to 07-JUN-09 22:44:00 (CST-6)
Location: TRENTON ARPT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in DE KALB, MISSOURI
From 07-JUN-09 19:29:00 to 07-JUN-09 19:29:00 (CST-6)
Location: SANTA ROSA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JACKSON, MISSOURI
From 07-JUN-09 16:45:00 to 07-JUN-09 16:45:00 (CST-6)
Location: COCKRELL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DAVIESS, MISSOURI
From 07-JUN-09 21:48:00 to 07-JUN-09 21:48:00 (CST-6)
Location: WINSTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in JACKSON, MISSOURI
From 07-JUN-09 17:17:00 to 07-JUN-09 17:17:00 (CST-6)
Location: OAK GROVE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in HOLT, MISSOURI
From 07-JUN-09 17:27:00 to 07-JUN-09 17:27:00 (CST-6)
Location: FORTESCUE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HOLT, MISSOURI
From 07-JUN-09 17:31:00 to 07-JUN-09 17:31:00 (CST-6)
Location: FOREST CITY
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in DAVIESS, MISSOURI
From 07-JUN-09 22:04:00 to 07-JUN-09 22:04:00 (CST-6)
Location: GALLATIN
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Powerlines were reported down and an elementary school was damaged.

Hail in LAFAYETTE, MISSOURI
From 07-JUN-09 17:14:00 to 07-JUN-09 17:14:00 (CST-6)
Location: CHAPEL HILL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter