Low pressure was located over southeast South Dakota during the afternoon of the 21st.  A warm front extended southeast out of the low across central, into southeast Iowa.  Considerable moisture was in place from moisture transport the previous night with precipitable water values in the 1.5 to 2 inch range.  Surface temperatures warmed into the mid 80s to low 90s, with dew point values in the mid 70s to low 80s.  CAPE was 2000 to 3000 J/kg, with 150 to 200 J/kg in the 0-3 km layer.  The freezing level was quite high at 17,300 feet with CAPE in the -10 to -30 C layer of the atmosphere of 300 to 500 J/kg.  The LCL was quite low at 750 meters with downdraft CAPE of 700 to 1000 J/kg.  Thunderstorms erupted over north central Iowa by mid afternoon.  The storms were discrete cells, however organization was poor through the afternoon.  A landspout was produced by one of the storms as it passed north of Stanhope in Hamilton County.  There was some debris in a field as it touched down briefly.  Several of the storms produced wall clouds and funnel clouds.  A tornado touched down briefly southeast of Williams in Hamilton County.  A cluster of storms continued to move east and northeast with numerous reports of land spouts and small tornadoes.  The bulk of the reports came from two to three cells traveling together.  Though the vast majority of the reports were landspout type tornadoes, there were 2 tornadoes that were on the ground for a few miles. The first was in Grundy County in the Wellsburg and Holland areas.  The tornado was on the ground for over 2 miles intermittently.  It did have a debris cloud, then became rain wrapped.  Another was on the ground for about 2 miles in Grundy County in the Dike area.  A hog confinement building was severely damaged west of Dike shortly after the tornado's initial touchdown.  The storms began to produce high winds as they exited the CWA.  Sixty MPH winds caused tree damage in parts of Grundy County before the storm moved east.

Funnel Cloud in GRUNDY, IOWA
From 21-JUN-09 18:07:00 to 21-JUN-09 18:07:00 (CST-6)
Location: WELLSBURG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in GRUNDY, IOWA
From 21-JUN-09 18:16:00 to 21-JUN-09 18:18:00 (CST-6)
Location: WELLSBURG
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Tree damage with 4 to 6 inch diameter branches snapped.

Thunderstorm Wind in GRUNDY, IOWA
From 21-JUN-09 18:30:00 to 21-JUN-09 18:30:00 (CST-6)
Location: HOLLAND
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large trees were uprooted.

Thunderstorm Wind in GRUNDY, IOWA
From 21-JUN-09 18:35:00 to 21-JUN-09 18:35:00 (CST-6)
Location: WELLSBURG
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Several trees were split.

Funnel Cloud in HAMILTON, IOWA
From 21-JUN-09 16:32:00 to 21-JUN-09 16:32:00 (CST-6)
Location: JEWELL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Funnel cloud was reported just southeast of 280th and Poplar Grove.

Heavy Rain in HARDIN, IOWA
From 21-JUN-09 16:50:00 to 21-JUN-09 17:50:00 (CST-6)
Location: IOWA FALLS MUNI ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nearly 2 inches of rain fell in the last hour.

Funnel Cloud in HAMILTON, IOWA
From 21-JUN-09 15:48:00 to 21-JUN-09 15:48:00 (CST-6)
Location: KAMRAR
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A funnel cloud was reported on the east side of Kamrar by spotters.

Funnel Cloud in HAMILTON, IOWA
From 21-JUN-09 16:44:00 to 21-JUN-09 16:44:00 (CST-6)
Location: WILLIAMS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Funnel Cloud in HAMILTON, IOWA
From 21-JUN-09 16:41:00 to 21-JUN-09 16:41:00 (CST-6)
Location: WILLIAMS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Funnel Cloud in BLACK HAWK, IOWA
From 21-JUN-09 18:57:00 to 21-JUN-09 18:57:00 (CST-6)
Location: CASTLE HILL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Funnel Cloud in BLACK HAWK, IOWA
From 21-JUN-09 19:17:00 to 21-JUN-09 19:17:00 (CST-6)
Location: WATERLOO
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Tornado in HAMILTON, IOWA
From 21-JUN-09 16:36:00 to 21-JUN-09 16:37:00 (CST-6)
Location: WILLIAMS
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There was a brief tornado touchdown with no damage reported.

Tornado in HARDIN, IOWA
From 21-JUN-09 17:15:00 to 21-JUN-09 17:16:00 (CST-6)
Location: EAGLE CITY
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Trained Spotter

A brief touchdown was reported.

Tornado in HARDIN, IOWA
From 21-JUN-09 17:39:00 to 21-JUN-09 17:40:00 (CST-6)
Location: ABBOTT
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Trained Spotter

There was a brief touchdown.

Tornado in GRUNDY, IOWA
From 21-JUN-09 17:51:00 to 21-JUN-09 17:52:00 (CST-6)
Location: WELLSBURG
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Amateur Radio

A tornado touched down briefly southeast of Cleves.

Tornado in HARDIN, IOWA
From 21-JUN-09 17:59:00 to 21-JUN-09 18:00:00 (CST-6)
Location: STEAMBOAT ROCK
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Trained Spotter

The tornado was on the ground briefly with a small debris cloud.

Tornado in GRUNDY, IOWA
From 21-JUN-09 18:20:00 to 21-JUN-09 18:28:00 (CST-6)
Location: DIKE
Tornado F-scale: EF1
Property damage: 25.00K
Crop damage: 2.00K
Reported by: Law Enforcement

A tornado touched down west of Dike and ended north of Dike.  A hog containment building sustained significant damage west of Dike.

Tornado in GRUNDY, IOWA
From 21-JUN-09 18:25:00 to 21-JUN-09 18:30:00 (CST-6)
Location: WELLSBURG
Tornado F-scale: EF1
Property damage: 10.00K
Crop damage: 5.00K
Reported by: Law Enforcement

A tornado was skipping up and down through the crops.  The tornado destroyed a corrugated steel building.

Tornado in HAMILTON, IOWA
From 21-JUN-09 15:48:00 to 21-JUN-09 15:50:00 (CST-6)
Location: KAMRAR
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 4.00K
Reported by: Trained Spotter

A tornado was viewed to the north from 320th and Highway 17.  Spotter reported a debris cloud and the tornado becoming rain wrapped.