The airmass remained quite unstable across the state as a weak cold front approached from the northwest and the main short wave lifted northeast through the central U.S.  CAPE values were in the 3000 to 4000 J/kg range with lifted indices between -8 and -9 C.  Thunderstorms formed over southern Iowa in the rich air with dew points in the mid 70s.  Downdraft CAPE was quite high at 1000 to 1200 J/kg.  CAPE in the -10 to -30 C layer of the atmosphere was quite a bit less than the previous round, in the 400 to 800 J/kg range.  The column was significantly sheared with 45 to 65 kts of effective shear present.  Plenty of moisture was available with 2.2 inches of precipitable water noted just south of the thunderstorm inception area.  Thunderstorms fired by early afternoon over a good part of Iowa with the strongest in the south central and parts of central Iowa.  Initially, the storms produced sub-severe hail around nickle size.  As the afternoon progressed, the storms became stronger and resulted in high winds.  Winds of 68 MPH hit the ASOS at Ottumwa for example.  In addition, the storms produced heavy rainfall.  This produced flooded roads in some areas, especially in Warren and Madison Counties.

Hail in JASPER, IOWA
From 19-JUN-09 13:52:00 to 19-JUN-09 13:52:00 (CST-6)
Location: NEWTON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 5.00K
Reported by: Trained Spotter

Thunderstorm Wind in MAHASKA, IOWA
From 19-JUN-09 15:10:00 to 19-JUN-09 15:10:00 (CST-6)
Location: OSKALOOSA MUNI ARPT
Magnitude: 52.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: ASOS

Heavy Rain in MADISON, IOWA
From 19-JUN-09 13:30:00 to 19-JUN-09 14:30:00 (CST-6)
Location: TRURO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water reported over Valley View Trail just north of Truro.

Hail in JASPER, IOWA
From 19-JUN-09 13:47:00 to 19-JUN-09 13:47:00 (CST-6)
Location: NEWTON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 5.00K
Reported by: Amateur Radio

Hail in JASPER, IOWA
From 19-JUN-09 13:50:00 to 19-JUN-09 13:50:00 (CST-6)
Location: NEWTON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 5.00K
Reported by: Law Enforcement

Hail in WARREN, IOWA
From 19-JUN-09 13:00:00 to 19-JUN-09 13:00:00 (CST-6)
Location: NORWALK
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 5.00K
Reported by: Trained Spotter

Thunderstorm Wind in WAPELLO, IOWA
From 19-JUN-09 15:13:00 to 19-JUN-09 15:13:00 (CST-6)
Location: (OTM)OTTUMWA INDSTRL
Magnitude: 59.00 MG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in MAHASKA, IOWA
From 19-JUN-09 15:14:00 to 19-JUN-09 15:14:00 (CST-6)
Location: OSKALOOSA MUNI ARPT
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Minor tree and roof damage was reported.

Heavy Rain in MADISON, IOWA
From 19-JUN-09 13:36:00 to 19-JUN-09 14:36:00 (CST-6)
Location: TRURO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Up to a foot of water over County Road G68.

Thunderstorm Wind in WAPELLO, IOWA
From 19-JUN-09 15:10:00 to 19-JUN-09 15:10:00 (CST-6)
Location: (OTM)OTTUMWA INDSTRL
Magnitude: 52.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: ASOS

Flood in WARREN, IOWA
From 19-JUN-09 15:00:00 to 19-JUN-09 17:00:00 (CST-6)
Location: NORWALK
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Cumming Highway and several gravel roads were covered with water due to the North River flooding.

Thunderstorm Wind in WAPELLO, IOWA
From 19-JUN-09 15:18:00 to 19-JUN-09 15:18:00 (CST-6)
Location: BLADENSBURG
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Rain in POWESHIEK, IOWA
From 19-JUN-09 15:00:00 to 19-JUN-09 15:00:00 (CST-6)
Location: BROOKLYN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water was briefly onto Highway F29 from a farm field.  Water was shallow, of hydroplane depth.