A very unstable situation took shape over Iowa during the day on the 11th.  A nearly stationary frontal boundary extended nearly east to west across the state along U.S. Highway 20, or roughly from Fort Dodge to Waterloo.  Very unstable air was to the south of the front with dew point temperatures in the low to mid 70s common.  By early afternoon, CAPE values were near 5000 J/KG with lifted indices in the -10 to -12 C. range.  A dry line advanced east toward the state along with the passage of a short wave lifting northeast across the area.  Thunderstorms fired along the triple point by the early afternoon hours in northwest Iowa.  The storms became severe very quickly and produced tornadoes as the sounding profile became very favorable.  In addition, significant mid level cooling took place as 700 mb temperatures fell several degrees during the day.   Most of the storms remained over the north third of the state with numerous reports of tornadoes.  The bulk of the tornadoes progressed southeast from northwest Iowa into the central counties of the state as the afternoon turned into evening.  For the most part, the tornadoes were quite small with only a few remaining on the ground for more than a few tenths of a mile.  Two tornadoes in Palo Alto and Emmet Counties were on the ground for a significant period of time, however they tracked over open country.  There were several tornadoes in Webster County.  Most of them were also small and did little damage, however one tornado near Otho hit two farmsteads there causing considerable damage.  One farmstead was nearly destroyed, including significant damage to the house.  Hail was common with the storms with much of it in the three quarter to one and one quarter inch diameter range.  There were a few golf ball size hail reports in Webster and Hamilton Counties, and one tennis ball size hail report in Stratford in Hamilton County.  Spotty reports of high were were received.  Winds were in the 60 to 70 MPH range.  Rainfall became a problem in a couple areas.  In Kossuth County rainfall of 2 to over 3 inches fell in under 2 hours causing flooding around the County.  Several roads became flooded, including Iowa Highway 9 and U.S. Highway 169.  Very heavy rain in the 2 to 4 inch range fell in Hamilton County during a 2 hour period.  This caused considerable flooding in the county, especially over the northwest half.  There was one high wind event.  In what turned out to be a high wind event occurred in Marion County.  A 60 MPH wind was recorded in Pella.  The event was in the wake of the line of thunderstorms and actually effected a several county area with winds of 40 to 50 MPH.  Temperatures shot up 9 degrees in a few minutes at the Des Moines Airport as a 51 MPH wind gust pushed the temperature up to 90 during the mid evening hours.

Thunderstorm Wind in WEBSTER, IOWA
From 11-JUN-04 18:00:00 to 11-JUN-04 18:00:00 (CST)
Location: BADGER
Magnitude: 61 EG
Property damage: 10K
Reported by: TRAINED SPOTTER

Hail in WEBSTER, IOWA
From 11-JUN-04 18:00:00 to 11-JUN-04 18:00:00 (CST)
Location: BADGER
Magnitude: 0.75 
Crop damage: 5K
Reported by: TRAINED SPOTTER

Hail in WEBSTER, IOWA
From 11-JUN-04 18:02:00 to 11-JUN-04 18:02:00 (CST)
Location: FT DODGE
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in WEBSTER, IOWA
From 11-JUN-04 18:05:00 to 11-JUN-04 18:05:00 (CST)
Location: FT DODGE
Magnitude: 1.25 
Property damage: 10K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Tornado in WEBSTER, IOWA
From 11-JUN-04 17:39:00 to 11-JUN-04 17:42:00 (CST)
Location: MOORLAND
Tornado F-scale: F0
Crop damage: 2K
Reported by: TRAINED SPOTTER

Rope like tornado touched down several times west of Moorland in open fields.

Hail in TAYLOR, IOWA
From 11-JUN-04 17:46:00 to 11-JUN-04 17:46:00 (CST)
Location: NEW MARKET
Magnitude: 0.88 
Crop damage: 5K
Reported by: TRAINED SPOTTER

Hail in WEBSTER, IOWA
From 11-JUN-04 17:49:00 to 11-JUN-04 17:49:00 (CST)
Location: FT DODGE
Magnitude: 1.00 
Property damage: 2K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Hail in WEBSTER, IOWA
From 11-JUN-04 17:51:00 to 11-JUN-04 17:51:00 (CST)
Location: FT DODGE
Magnitude: 1.00 
Property damage: 2K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Hail in WEBSTER, IOWA
From 11-JUN-04 17:52:00 to 11-JUN-04 17:52:00 (CST)
Location: FT DODGE
Magnitude: 1.00 
Property damage: 2K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Hail in WEBSTER, IOWA
From 11-JUN-04 17:53:00 to 11-JUN-04 17:53:00 (CST)
Location: FT DODGE
Magnitude: 0.88 
Property damage: 1K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Hail in WEBSTER, IOWA
From 11-JUN-04 17:54:00 to 11-JUN-04 17:54:00 (CST)
Location: FT DODGE
Magnitude: 1.00 
Property damage: 5K
Reported by: TRAINED SPOTTER

Hail in WEBSTER, IOWA
From 11-JUN-04 17:55:00 to 11-JUN-04 17:55:00 (CST)
Location: FT DODGE
Magnitude: 1.00 
Property damage: 2K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Hail in WEBSTER, IOWA
From 11-JUN-04 17:57:00 to 11-JUN-04 17:57:00 (CST)
Location: BADGER
Magnitude: 1.00 
Property damage: 2K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Hail in WEBSTER, IOWA
From 11-JUN-04 18:00:00 to 11-JUN-04 18:00:00 (CST)
Location: FT DODGE
Magnitude: 1.00 
Property damage: 5K
Reported by: TRAINED SPOTTER

Hail in WEBSTER, IOWA
From 11-JUN-04 18:07:00 to 11-JUN-04 18:07:00 (CST)
Location: FT DODGE
Magnitude: 1.25 
Property damage: 10K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Hail in WEBSTER, IOWA
From 11-JUN-04 18:09:00 to 11-JUN-04 18:09:00 (CST)
Location: FT DODGE
Magnitude: 1.75 
Property damage: 50K
Reported by: TRAINED SPOTTER

Hail in WEBSTER, IOWA
From 11-JUN-04 18:11:00 to 11-JUN-04 18:11:00 (CST)
Location: FT DODGE
Magnitude: 1.00 
Property damage: 5K
Reported by: TRAINED SPOTTER

Hail in WEBSTER, IOWA
From 11-JUN-04 18:12:00 to 11-JUN-04 18:12:00 (CST)
Location: FT DODGE
Magnitude: 0.88 
Property damage: 2K
Reported by: TRAINED SPOTTER

Thunderstorm Wind in WRIGHT, IOWA
From 11-JUN-04 18:15:00 to 11-JUN-04 18:15:00 (CST)
Location: CLARION
Magnitude: 50 MG
Reported by: AWOS,ASOS,MESONET,ETC

Tornado in WEBSTER, IOWA
From 11-JUN-04 18:20:00 to 11-JUN-04 18:25:00 (CST)
Location: OTHO
Tornado F-scale: F0
Property damage: 100K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Tornado touched down south of Otho and caused extensive damage to two farmsteads.

Hail in WEBSTER, IOWA
From 11-JUN-04 18:20:00 to 11-JUN-04 18:20:00 (CST)
Location: OTHO
Magnitude: 1.75 
Property damage: 10K
Crop damage: 5K
Reported by: LAW ENFORCEMENT

Hail in WEBSTER, IOWA
From 11-JUN-04 18:25:00 to 11-JUN-04 18:25:00 (CST)
Location: DUNCOMBE
Magnitude: 1.00 
Property damage: 3K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Tornado in WEBSTER, IOWA
From 11-JUN-04 18:30:00 to 11-JUN-04 18:44:00 (CST)
Location: LEHIGH
Tornado F-scale: F0
Crop damage: 10K
Reported by: TRAINED SPOTTER

Tornado was very small and remained in open country.  The track of the tornado was very intermittent as well.

Hail in RINGGOLD, IOWA
From 11-JUN-04 18:30:00 to 11-JUN-04 18:30:00 (CST)
Location: CLEARFIELD
Magnitude: 0.88 
Property damage: 2K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Hail in RINGGOLD, IOWA
From 11-JUN-04 18:30:00 to 11-JUN-04 18:30:00 (CST)
Location: DIAGONAL
Magnitude: 1.00 
Property damage: 3K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Tornado in WEBSTER, IOWA
From 11-JUN-04 18:41:00 to 11-JUN-04 18:41:00 (CST)
Location: DAYTON
Tornado F-scale: F0
Crop damage: 2K
Reported by: AMATEUR RADIO

Brief touchdown in open country.

Tornado in PALO ALTO, IOWA
From 11-JUN-04 14:00:00 to 11-JUN-04 14:28:00 (CST)
Location: RUTHVEN
Tornado F-scale: F1
Property damage: 10K
Crop damage: 5K
Reported by: LAW ENFORCEMENT

Tornado tracked through mostly open area with only minor damage reported.

Hail in EMMET, IOWA
From 11-JUN-04 14:44:00 to 11-JUN-04 14:44:00 (CST)
Location: RINGSTED
Magnitude: 0.75 
Crop damage: 5K
Reported by: LAW ENFORCEMENT

Tornado in EMMET, IOWA
From 11-JUN-04 14:50:00 to 11-JUN-04 15:02:00 (CST)
Location: RINGSTED
Tornado F-scale: F1
Property damage: 5K
Crop damage: 5K
Reported by: LAW ENFORCEMENT

Tonado tracked through open country with little damage reported.

Hail in EMMET, IOWA
From 11-JUN-04 15:18:00 to 11-JUN-04 15:18:00 (CST)
Location: RINGSTED
Magnitude: 0.75 
Crop damage: 5K
Reported by: LAW ENFORCEMENT

Hail in EMMET, IOWA
From 11-JUN-04 15:29:00 to 11-JUN-04 15:29:00 (CST)
Location: ARMSTRONG
Magnitude: 0.75 
Crop damage: 5K
Reported by: LAW ENFORCEMENT

Hail in KOSSUTH, IOWA
From 11-JUN-04 15:37:00 to 11-JUN-04 15:37:00 (CST)
Location: SWEA CITY
Magnitude: 1.00 
Property damage: 2K
Crop damage: 5K
Reported by: BROADCAST MEDIA

Hail in PALO ALTO, IOWA
From 11-JUN-04 15:43:00 to 11-JUN-04 15:43:00 (CST)
Location: EMMETSBURG
Magnitude: 1.75 
Property damage: 10K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Hail in EMMET, IOWA
From 11-JUN-04 15:45:00 to 11-JUN-04 15:45:00 (CST)
Location: RINGSTED
Magnitude: 1.50 
Property damage: 10K
Crop damage: 3K
Reported by: OFFICIAL NWS OBS.

Hail in KOSSUTH, IOWA
From 11-JUN-04 16:11:00 to 11-JUN-04 16:11:00 (CST)
Location: SWEA CITY
Magnitude: 0.88 
Property damage: 1K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Hail in HAMILTON, IOWA
From 11-JUN-04 19:40:00 to 11-JUN-04 19:40:00 (CST)
Location: STRATFORD
Magnitude: 1.00 
Property damage: 5K
Reported by: TRAINED SPOTTER

Tornado in BOONE, IOWA
From 11-JUN-04 19:45:00 to 11-JUN-04 19:46:00 (CST)
Location: PILOT MOUND
Tornado F-scale: F0
Crop damage: 3K
Reported by: AMATEUR RADIO

Tornado touched down in open areas east of Pilot Mound.

Thunderstorm Wind in BOONE, IOWA
From 11-JUN-04 19:52:00 to 11-JUN-04 19:52:00 (CST)
Location: PILOT MOUND
Magnitude: 61 EG
Property damage: 25K
Reported by: EMERGENCY MANAGER

Flash Flood in HAMILTON, IOWA
From 11-JUN-04 20:00:00 to 11-JUN-04 22:45:00 (CST)
Location: COUNTYWIDE
Property damage: 100K
Crop damage: 10K
Reported by: LAW ENFORCEMENT

Tornado in BOONE, IOWA
From 11-JUN-04 20:01:00 to 11-JUN-04 20:01:00 (CST)
Location: BOONE
Tornado F-scale: F0
Crop damage: 1K
Reported by: STORM CHASER

Tornado reported by chase team to be on the ground in open country for 20 seconds.

Hail in STORY, IOWA
From 11-JUN-04 20:30:00 to 11-JUN-04 20:30:00 (CST)
Location: STORY CITY
Magnitude: 1.75 
Property damage: 10K
Crop damage: 5K
Reported by: EMERGENCY MANAGER

Hail in HAMILTON, IOWA
From 11-JUN-04 18:47:00 to 11-JUN-04 18:47:00 (CST)
Location: WEBSTER CITY
Magnitude: 1.00 
Property damage: 2K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Tornado in WEBSTER, IOWA
From 11-JUN-04 18:49:00 to 11-JUN-04 18:49:00 (CST)
Location: LEHIGH
Tornado F-scale: F0
Crop damage: 1K
Reported by: TRAINED SPOTTER

Brief touchdown in open field.

Hail in EMMET, IOWA
From 11-JUN-04 14:46:00 to 11-JUN-04 14:46:00 (CST)
Location: RINGSTED
Magnitude: 1.00 
Property damage: 2K
Crop damage: 5K
Reported by: LAW ENFORCEMENT

Hail in WEBSTER, IOWA
From 11-JUN-04 18:49:00 to 11-JUN-04 18:49:00 (CST)
Location: BURNSIDE
Magnitude: 1.00 
Property damage: 2K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Hail in HAMILTON, IOWA
From 11-JUN-04 19:00:00 to 11-JUN-04 19:00:00 (CST)
Location: WEBSTER CITY
Magnitude: 1.75 
Property damage: 10K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Hail in HAMILTON, IOWA
From 11-JUN-04 19:15:00 to 11-JUN-04 19:15:00 (CST)
Location: WEBSTER CITY
Magnitude: 1.50 
Property damage: 25K
Reported by: BROADCAST MEDIA

Hail in HAMILTON, IOWA
From 11-JUN-04 19:27:00 to 11-JUN-04 19:27:00 (CST)
Location: WEBSTER CITY
Magnitude: 1.00 
Property damage: 5K
Reported by: AMATEUR RADIO

Hail in HAMILTON, IOWA
From 11-JUN-04 19:28:00 to 11-JUN-04 19:28:00 (CST)
Location: STRATFORD
Magnitude: 0.75 
Reported by: AMATEUR RADIO

Hail in HAMILTON, IOWA
From 11-JUN-04 19:30:00 to 11-JUN-04 19:30:00 (CST)
Location: STRATFORD
Magnitude: 1.50 
Property damage: 10K
Crop damage: 5K
Reported by: LAW ENFORCEMENT

Hail in HAMILTON, IOWA
From 11-JUN-04 19:32:00 to 11-JUN-04 19:32:00 (CST)
Location: STRATFORD
Magnitude: 2.00 
Property damage: 50K
Reported by: BROADCAST MEDIA

Hail in HAMILTON, IOWA
From 11-JUN-04 19:36:00 to 11-JUN-04 19:36:00 (CST)
Location: STRATFORD
Magnitude: 1.75 
Property damage: 25K
Reported by: LAW ENFORCEMENT

Hail in HAMILTON, IOWA
From 11-JUN-04 19:36:00 to 11-JUN-04 19:36:00 (CST)
Location: STRATFORD
Magnitude: 0.75 
Crop damage: 5K
Reported by: TRAINED SPOTTER

Tornado in CALHOUN, IOWA
From 11-JUN-04 17:35:00 to 11-JUN-04 17:37:00 (CST)
Location: SOMERS
Tornado F-scale: F0
Crop damage: 2K
Reported by: LAW ENFORCEMENT

Several brief touchdowns in open fields near Somers.

Tornado in WEBSTER, IOWA
From 11-JUN-04 17:36:00 to 11-JUN-04 17:37:00 (CST)
Location: MOORLAND
Tornado F-scale: F0
Crop damage: 2K
Reported by: LAW ENFORCEMENT

Brief touchdown in open fields.

Hail in WEBSTER, IOWA
From 11-JUN-04 17:22:00 to 11-JUN-04 17:22:00 (CST)
Location: CLARE
Magnitude: 0.88 
Property damage: 2K
Crop damage: 5K
Reported by: TRAINED SPOTTER

Tornado in WEBSTER, IOWA
From 11-JUN-04 17:35:00 to 11-JUN-04 17:35:00 (CST)
Location: BARNUM
Tornado F-scale: F0
Reported by: STORM CHASER

Brief tornado touchdown in open areas of the county.

Thunderstorm Wind in KOSSUTH, IOWA
From 11-JUN-04 16:33:00 to 11-JUN-04 16:33:00 (CST)
Location: BANCROFT
Magnitude: 52 EG
Property damage: 5K
Reported by: AMATEUR RADIO

Thunderstorm Wind in KOSSUTH, IOWA
From 11-JUN-04 16:53:00 to 11-JUN-04 16:53:00 (CST)
Location: LAKOTA
Magnitude: 61 EG
Property damage: 10K
Reported by: TRAINED SPOTTER

Hail in KOSSUTH, IOWA
From 11-JUN-04 17:05:00 to 11-JUN-04 17:05:00 (CST)
Location: ALGONA
Magnitude: 0.75 
Crop damage: 5K
Reported by: TRAINED SPOTTER

Hail in KOSSUTH, IOWA
From 11-JUN-04 17:07:00 to 11-JUN-04 17:07:00 (CST)
Location: TITONKA
Magnitude: 0.75 
Crop damage: 3K
Reported by: LAW ENFORCEMENT

Flash Flood in KOSSUTH, IOWA
From 11-JUN-04 17:00:00 to 11-JUN-04 20:15:00 (CST)
Location: COUNTYWIDE
Property damage: 50K
Crop damage: 20K
Reported by: LAW ENFORCEMENT

Hail in KOSSUTH, IOWA
From 11-JUN-04 17:08:00 to 11-JUN-04 17:08:00 (CST)
Location: ALGONA
Magnitude: 1.00 
Property damage: 10K
Crop damage: 3K
Reported by: TRAINED SPOTTER

Hail in WEBSTER, IOWA
From 11-JUN-04 18:11:00 to 11-JUN-04 18:11:00 (CST)
Location: FT DODGE
Magnitude: 0.88 
Property damage: 5K
Crop damage: 3K
Reported by: TRAINED SPOTTER

Hail in HUMBOLDT, IOWA
From 11-JUN-04 17:11:00 to 11-JUN-04 17:11:00 (CST)
Location: RUTLAND
Magnitude: 1.00 
Property damage: 5K
Crop damage: 5K
Reported by: LAW ENFORCEMENT

Hail in POCAHONTAS, IOWA
From 11-JUN-04 17:12:00 to 11-JUN-04 17:12:00 (CST)
Location: PALMER
Magnitude: 0.75 
Crop damage: 5K
Reported by: STORM CHASER

Thunderstorm Wind in STORY, IOWA
From 11-JUN-04 20:50:00 to 11-JUN-04 20:50:00 (CST)
Location: MC CALLSBURG
Magnitude: 52 EG
Property damage: 5K
Reported by: EMERGENCY MANAGER

Hail in STORY, IOWA
From 11-JUN-04 20:55:00 to 11-JUN-04 20:55:00 (CST)
Location: NEVADA
Magnitude: 1.00 
Property damage: 3K
Crop damage: 5K
Reported by: LAW ENFORCEMENT

Hail in STORY, IOWA
From 11-JUN-04 21:13:00 to 11-JUN-04 21:13:00 (CST)
Location: COLO
Magnitude: 0.75 
Crop damage: 5K
Reported by: EMERGENCY MANAGER

High Wind in MARION, IOWA
From 11-JUN-04 22:07:00 to 11-JUN-04 22:07:00 (CST)
Magnitude: 52 MG
Property damage: 2K
Reported by: AWOS,ASOS,MESONET,ETC