A strong storm system was approaching the region. Several rounds of thunderstorms moved through from the afternoon hours of May 30th through late morning on May 31st.  There were numerous reports of damaging winds, large hail and flash flooding with these storms.  A more significant round of storms moved through the region during the evening hours of May 31st.

Thunderstorm Wind in ST. LOUIS, MISSOURI
From 30-MAY-13 17:39:00 to 30-MAY-13 17:41:00 (CST-6)
Location: FERNRIDGE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down numerous large tree limbs.

Thunderstorm Wind in MONITEAU, MISSOURI
From 31-MAY-13 07:10:00 to 31-MAY-13 07:22:00 (CST-6)
Location: TIPTON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down several large trees just east of Tipton and in California.

Thunderstorm Wind in COLE, MISSOURI
From 31-MAY-13 07:48:00 to 31-MAY-13 07:57:00 (CST-6)
Location: JEFFERSON CITY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds snapped off several large trees across town.  Also, some shingles were blown off of a house south of town.

Hail in COLE, MISSOURI
From 31-MAY-13 07:55:00 to 31-MAY-13 07:55:00 (CST-6)
Location: JEFFERSON CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in CALLAWAY, MISSOURI
From 31-MAY-13 08:05:00 to 31-MAY-13 08:05:00 (CST-6)
Location: WAINWRIGHT
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds blew down a couple of trees which blocked both lanes of Highway 94 near Wainwright.

Thunderstorm Wind in STE. GENEVIEVE, MISSOURI
From 30-MAY-13 17:05:00 to 30-MAY-13 17:05:00 (CST-6)
Location: ST MARYS
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm winds split a three foot diameter tree and blew down numerous large tree limbs around town.

Flash Flood in RALLS, MISSOURI
From 30-MAY-13 16:45:00 to 30-MAY-13 22:00:00 (CST-6)
Location: ILASCO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Up to three inches of rain fell in a short amount of time causing flash flooding.  Bear Creek was running out of its banks and flooding a mobile home park on the south side of Hannibal just off of Warren Barrett Drive on Ledbetter Lane.  Also, Highway 79 near intersection with Monkey Run Trail had water flowing over it.

Flash Flood in MARION, MISSOURI
From 30-MAY-13 15:30:00 to 30-MAY-13 22:00:00 (CST-6)
Location: HELTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Up to three inches of rain fell in a short amount of time causing flash flooding in the Hannibal and Palmyra areas.  Several roads were flooded including the intersection of U.S. Highway 61 and Highway 168.

Thunderstorm Wind in LINCOLN, MISSOURI
From 30-MAY-13 15:53:00 to 30-MAY-13 15:53:00 (CST-6)
Location: FOLEY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds blew down a one foot diameter tree as well as numerous tree limbs in Foley.

Thunderstorm Wind in IRON, MISSOURI
From 30-MAY-13 16:45:00 to 30-MAY-13 16:45:00 (CST-6)
Location: DES ARC
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down several large trees and power lines along County Road 163 just northeast of Des Arc.

Thunderstorm Wind in STE. GENEVIEVE, MISSOURI
From 30-MAY-13 16:45:00 to 30-MAY-13 16:45:00 (CST-6)
Location: AVON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down two large trees, partially blocking Highway F near intersection with Highway MM.

Flash Flood in BOONE, MISSOURI
From 31-MAY-13 08:30:00 to 31-MAY-13 12:30:00 (CST-6)
Location: EASLEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Up to three inches of rain fell in a short amount of time causing flash flooding.  Several roads were flooded including State Highway MM where it goes over Fox Hollow Branch.

Thunderstorm Wind in ST. CHARLES, MISSOURI
From 30-MAY-13 17:55:00 to 30-MAY-13 17:55:00 (CST-6)
Location: ORCHARD FARM
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Two large trees were blown down, which in turn knocked down a couple of power lines.

Thunderstorm Wind in MADISON, MISSOURI
From 30-MAY-13 16:15:00 to 30-MAY-13 16:15:00 (CST-6)
Location: FREDERICKTOWN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm winds blew down several medium to large trees around Fredericktown.