The frontal system that moved into the state the previous night was located over southeast Iowa during the afternoon of the 12th.  The atmosphere became unstable during peak heating with MUCAPE around 2000 J/kg.  There was 50 to 70 kts of effective shear across the area.  The freezing level lower than the previous day, around 11,300 feet.  This lead to the greater production of hail with this event.  Some of the hail was as large as golf balls in Monroe and Mahaska Counties. One tornado touched down in Davis County near the town of Savannah and was on the ground briefly.  Soil conditions across Iowa remained very saturated with much of the state in flood.  Flash flooding became widespread in Wapello and Appanoose Counties with flash flooding also reported in Monroe County.

Tornado in DAVIS, IOWA
From 12-JUN-08 15:55:00 to 12-JUN-08 15:57:00 (CST-6)
Location: SAVANNAH
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Public reported a tornado near the town of Savannah moving northeast.

Heavy Rain in WAYNE, IOWA
From 12-JUN-08 16:00:00 to 12-JUN-08 20:00:00 (CST-6)
Location: SEYMOUR
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rainfall of 3.7 inches.

Hail in MONROE, IOWA
From 12-JUN-08 16:10:00 to 12-JUN-08 16:10:00 (CST-6)
Location: AVERY
Magnitude: 1.75 
Property damage: 25.00K
Crop damage: 5.00K
Reported by: Trained Spotter

Hail in WAPELLO, IOWA
From 12-JUN-08 16:13:00 to 12-JUN-08 16:16:00 (CST-6)
Location: EDDYVILLE
Magnitude: 1.00 
Property damage: 5.00K
Crop damage: 10.00K
Reported by: Trained Spotter

Hail ranged in size from pennies to the size of quarters and lasted 3 minutes.

Hail in WAPELLO, IOWA
From 12-JUN-08 19:17:00 to 12-JUN-08 19:17:00 (CST-6)
Location: OTTUMWA
Magnitude: 0.88 
Property damage: 1.00K
Crop damage: 5.00K
Reported by: Trained Spotter

Flash Flood in WAPELLO, IOWA
From 12-JUN-08 21:22:00 to 13-JUN-08 04:15:00 (CST-6)
Location: OTTUMWA
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Water from 6 inches to 3 feet deep was flooding about half of the south side of Ottumwa.

Hail in POWESHIEK, IOWA
From 12-JUN-08 14:37:00 to 12-JUN-08 14:37:00 (CST-6)
Location: GRINNELL ARPT
Magnitude: 0.88 
Property damage: 1.00K
Crop damage: 5.00K
Reported by: Law Enforcement

Hail in MONROE, IOWA
From 12-JUN-08 16:00:00 to 12-JUN-08 16:00:00 (CST-6)
Location: ALBIA
Magnitude: 1.75 
Property damage: 75.00K
Crop damage: 5.00K
Reported by: Law Enforcement

Several reports of golf ball size hail in the Albia area.  Car windows were also reported to be broken.

Flash Flood in WAPELLO, IOWA
From 12-JUN-08 20:27:00 to 13-JUN-08 04:15:00 (CST-6)
Location: OTTUMWA
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flash flooding was reported by the Ottumwa police and city management.  Numerous cars stalled.

Flash Flood in MONROE, IOWA
From 13-JUN-08 00:04:00 to 13-JUN-08 04:15:00 (CST-6)
Location: AVERY
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roads were closed due to water running over old Highway 34 east of Albia.

Flash Flood in APPANOOSE, IOWA
From 12-JUN-08 18:21:00 to 13-JUN-08 04:15:00 (CST-6)
Location: MYSTIC
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Deputy reported water at least 3 to 4 inches deep and flowing across 472nd St west of Highway T14.  Also, water was flowing across T14 north of that location.

Flash Flood in APPANOOSE, IOWA
From 13-JUN-08 00:06:00 to 13-JUN-08 04:15:00 (CST-6)
Location: NUMA
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Road closed due to flash flooding on 170th Ave southeast of Numa.

Hail in MAHASKA, IOWA
From 12-JUN-08 16:17:00 to 12-JUN-08 16:17:00 (CST-6)
Location: GIVIN
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 5.00K
Reported by: Law Enforcement

Hail ranged from nickel to golf ball size.