A very dynamic weather situation unfolded during the 5th into the 6th.  Although the atmosphere was summer like in the lower elevations, the upper levels were more typical of April.  A strong upper level low pressure area lifted northeast out of the southern Rockies with a negatively tilted trough of low pressure lifting northeast across the central U.S.  An intense low pressure area developed over northern Kansas and lifted north into southeast North Dakota by the morning of the 6th, with a central Pressure of 984 mb.  During the day on the 5th, the atmosphere was capped with the freezing level rising to 15,600 feet by the evening hours over central Iowa.  A warm front lifted north across Iowa, with temperatures warming into the mid 80s to the south of the front with dewpoint readings in the low 70s.  It became quite unstable by evening with MUCAPE between 2500 and 3000 J/kg and lifted indices in the -5 to -9 C. range.  Considerable shear was available with the effective shear between 40 and 65 kts by evening.  Downdraft CAPE was between 800 and 1400 J/kg across the CWA, with 400 to 500 J/kg of CAPE available in the -10 to -30 C. layer of the atmosphere.  The airmass became very moist by evening with 1.6 to 1.9 inches of precipitable water available by evening.  The LCL fall to between 750 and 1250 meters.  Thunderstorms erupted to the southwest of Iowa in central Kansas, along the dry line there.  The storms raced northeast into Iowa by sunset.  In spite of the dynamics that were in place, the amount of severe weather was relatively limited.  Hail was limited by the high freezing level and lack of supercellular development.  Several of the storms produced small hail and a few produced high winds.  There were several reports of brief tornado touchdowns, but little in the way of damage was reported for the most part.  The first tornado touched down in Cass County and was only on the ground briefly.  Another tornado touched down in Union County.  The tornado took the roof off of an outbuilding and knocked down some power lines.  The strongest tornado was on the ground for over 18 miles in Warren and Marion Counties.  The tornado track was over open country for the most part and damaged outbuildings and one house.  Three other tornadoes touched down in Jasper County, causing some moderate damage.  The most significant feature with this event was the flash flooding.  Soil conditions across the state were very saturated.  Any significant rainfall resulted in flash flooding.  A narrow band of heavier rainfall stretched from south central into central Iowa.  Flash flooding occurred in the Des Moines metro area as the airport recorded 4.15 inches of rainfall for the day, with about 3 inches falling in two hours.  Reports of severe street flooding were received with numerous reports of manhole covers being blown off.  During the event, high winds occurred over the far northwest part of the CWA as the surface low intensified rapidly and the gradient tightened.  A window was blown out in Pocahontas County, with tree and power line damage done in Emmet County.  A barn was also damaged near Gruver in Emmet County by the high wind.

Tornado in WARREN, IOWA
From 05-JUN-08 23:10:00 to 05-JUN-08 23:25:00 (CST-6)
Location: LIBERTY CENTER
Tornado F-scale: EF1
Property damage: 150.00K
Crop damage: 10.00K
Reported by: Emergency Manager

Tornado touched down in the central part of the county and tracked to the northeast corner.  For the most part, the track was across open country with damage to outbuildings and one house. Tornado crossed from Warren County in Marion County.

High Wind in EMMET, IOWA
From 05-JUN-08 21:07:00 to 05-JUN-08 23:59:00 (CST-6)
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Power outages and trees were downed in Gruver as reported by the Emmet County Sheriff.

Thunderstorm Wind in MARSHALL, IOWA
From 06-JUN-08 00:05:00 to 06-JUN-08 00:05:00 (CST-6)
Location: GILMAN
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Power poles were leaning at a 45 degree angle.  A highway sign was snapped off and large tree branches were downed.

Thunderstorm Wind in GRUNDY, IOWA
From 06-JUN-08 00:30:00 to 06-JUN-08 00:30:00 (CST-6)
Location: DIKE
Magnitude: 65.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Damage was done to a mobile home park.  A shed was destroyed.  Mobile home was moved off its foundation with siding blown off homes.

Thunderstorm Wind in BLACK HAWK, IOWA
From 06-JUN-08 00:45:00 to 06-JUN-08 00:45:00 (CST-6)
Location: WATERLOO
Magnitude: 57.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees and power lines were down across the Waterloo and Cedar Falls area including the University of Northern Iowa.  One tree fell on a house.

Tornado in CASS, IOWA
From 05-JUN-08 19:12:00 to 05-JUN-08 19:14:00 (CST-6)
Location: CUMBERLAND
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Relayed public report of brief touchdown.

Tornado in UNION, IOWA
From 05-JUN-08 20:24:00 to 05-JUN-08 20:29:00 (CST-6)
Location: CRESTON
Tornado F-scale: EF1
Property damage: 25.00K
Crop damage: 2.00K
Reported by: Law Enforcement

The roof was taken off of an outbuilding and power lines were blown down north of Creston.

Tornado in JASPER, IOWA
From 05-JUN-08 23:45:00 to 05-JUN-08 23:56:00 (CST-6)
Location: REASNOR
Tornado F-scale: EF1
Property damage: 250.00K
Crop damage: 5.00K
Reported by: Emergency Manager

Newly built machine shed destroyed with roof off of a house.  Hit campground near Kellogg with 2 injuries along with flipped campers. Semis blown off Interstate 80.

Tornado in CLARKE, IOWA
From 05-JUN-08 22:49:00 to 05-JUN-08 22:54:00 (CST-6)
Location: LESLIE
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Power lines downed and numerous trees damaged.

Tornado in MARION, IOWA
From 05-JUN-08 23:25:00 to 05-JUN-08 23:28:00 (CST-6)
Location: SWAN
Tornado F-scale: EF1
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Tornado continued into Marion County from Warren County.  Roof was taken off house.

Tornado in JASPER, IOWA
From 05-JUN-08 23:36:00 to 05-JUN-08 23:45:00 (CST-6)
Location: PRAIRIE CITY
Tornado F-scale: EF1
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Twelve outbuildings sustained damage with significant damage to trees.

Tornado in JASPER, IOWA
From 05-JUN-08 23:49:00 to 05-JUN-08 23:59:00 (CST-6)
Location: NEWTON
Tornado F-scale: EF0
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Roofs off of outbuildings along with tree damage.

Flood in WARREN, IOWA
From 05-JUN-08 19:23:00 to 06-JUN-08 08:00:00 (CST-6)
Location: SUMMERSET
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 5.00K
Reported by: Emergency Manager

Highway G24 was covered with water just west of the intersection of Highway 65/69 and Highway G24.  Was caused by the overflow from the Middle River.

Flood in WARREN, IOWA
From 05-JUN-08 22:45:00 to 06-JUN-08 08:00:00 (CST-6)
Location: PROLE
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Highway 28 on the north edge of Martensdale had water over the road.

Flood in STORY, IOWA
From 06-JUN-08 08:10:00 to 06-JUN-08 08:10:00 (CST-6)
Location: NEVADA
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Indian Creek was well out of its banks...flooding the 4H grounds at City Park in Nevada.

Flash Flood in WARREN, IOWA
From 05-JUN-08 22:16:00 to 06-JUN-08 04:15:00 (CST-6)
Location: CUMMING
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Street flooding was reported in Orillia.

Flash Flood in MADISON, IOWA
From 05-JUN-08 21:56:00 to 06-JUN-08 04:15:00 (CST-6)
Location: EAST PERU
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flash flooding was reported at Clanton Creek.

Flash Flood in WARREN, IOWA
From 05-JUN-08 22:22:00 to 06-JUN-08 04:15:00 (CST-6)
Location: SUMMERSET
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water was over the road at 115th Ave.

Flash Flood in POLK, IOWA
From 05-JUN-08 22:45:00 to 06-JUN-08 04:15:00 (CST-6)
Location: (DSM)DES MOINES INTL
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Five feet of water was reported over Highway 5 and Highway 28 with multiple cars stalled.

Flash Flood in POLK, IOWA
From 05-JUN-08 22:45:00 to 06-JUN-08 04:15:00 (CST-6)
Location: (DSM)DES MOINES INTL
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Fleur Drive south of Army Post Road had cars stalled with 8 to 9 inches of water on the road.

Flash Flood in WARREN, IOWA
From 05-JUN-08 22:45:00 to 06-JUN-08 03:15:00 (CST-6)
Location: NORWALK
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Six to eight inches of water was running over the road in places, with up to a foot of standing water in places.

Flash Flood in TAYLOR, IOWA
From 05-JUN-08 22:50:00 to 06-JUN-08 01:30:00 (CST-6)
Location: GUSS
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flash Flood in TAYLOR, IOWA
From 05-JUN-08 22:50:00 to 06-JUN-08 01:30:00 (CST-6)
Location: GUSS
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water reported over the road on Badger Ave between 150th and 155th Streets.

Flash Flood in DECATUR, IOWA
From 05-JUN-08 23:00:00 to 06-JUN-08 02:12:00 (CST-6)
Location: LEON
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water reported over roads in Leon.

Flash Flood in POLK, IOWA
From 06-JUN-08 00:08:00 to 06-JUN-08 04:15:00 (CST-6)
Location: DES MOINES
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Reports of manhole covers being blown off from flood waters around Court Ave.

Flash Flood in POLK, IOWA
From 06-JUN-08 00:08:00 to 06-JUN-08 04:15:00 (CST-6)
Location: DES MOINES
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Manhole covers being blown off in downtown Des Moines.

Funnel Cloud in POLK, IOWA
From 05-JUN-08 21:25:00 to 05-JUN-08 21:25:00 (CST-6)
Location: WINDSOR HGTS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Heavy Rain in POLK, IOWA
From 05-JUN-08 21:55:00 to 05-JUN-08 22:40:00 (CST-6)
Location: DES MOINES
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Two inches of rain fell in 45 minutes.

Hail in STORY, IOWA
From 05-JUN-08 21:34:00 to 05-JUN-08 21:34:00 (CST-6)
Location: SLATER
Magnitude: 0.88 
Property damage: 1.00K
Crop damage: 5.00K
Reported by: Amateur Radio

Hail in STORY, IOWA
From 05-JUN-08 21:49:00 to 05-JUN-08 21:49:00 (CST-6)
Location: AMES
Magnitude: 0.88 
Property damage: 2.00K
Crop damage: 5.00K
Reported by: Amateur Radio

Thunderstorm Wind in JASPER, IOWA
From 05-JUN-08 23:44:00 to 05-JUN-08 23:44:00 (CST-6)
Location: BAXTER
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Report received from a Schoolnet site.

Thunderstorm Wind in CLARKE, IOWA
From 05-JUN-08 22:49:00 to 05-JUN-08 22:49:00 (CST-6)
Location: LESLIE
Magnitude: 61.00 EG
Property damage: 35.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A hog confinement building was damaged with roofs off of the buildings at the intersection of H48 and R48 east of Highway 69.  Possible tornado.

Thunderstorm Wind in CLARKE, IOWA
From 05-JUN-08 22:54:00 to 05-JUN-08 22:54:00 (CST-6)
Location: OSCEOLA MUNI ARPT
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Eight to 10 inch limbs and power lines were downed at 270th Ave and Kansas St.  Possible tornado.

Thunderstorm Wind in WARREN, IOWA
From 05-JUN-08 23:20:00 to 05-JUN-08 23:20:00 (CST-6)
Location: SANDYVILLE
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees and power lines were blown down on Highway 92.  Extensive damage was also reported in town.

Thunderstorm Wind in MARION, IOWA
From 05-JUN-08 23:27:00 to 05-JUN-08 23:27:00 (CST-6)
Location: KNOXVILLE ARPT
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees were blown down.

Thunderstorm Wind in BUTLER, IOWA
From 06-JUN-08 00:30:00 to 06-JUN-08 00:30:00 (CST-6)
Location: NEW HARTFORD
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down.

Thunderstorm Wind in BLACK HAWK, IOWA
From 06-JUN-08 00:41:00 to 06-JUN-08 00:41:00 (CST-6)
Location: CEDAR FALLS
Magnitude: 57.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were uprooted and power lines blown down.

Thunderstorm Wind in MARION, IOWA
From 05-JUN-08 23:52:00 to 05-JUN-08 23:52:00 (CST-6)
Location: PELLA
Magnitude: 50.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in GRUNDY, IOWA
From 06-JUN-08 00:13:00 to 06-JUN-08 00:13:00 (CST-6)
Location: WELLSBURG
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in TAMA, IOWA
From 06-JUN-08 00:39:00 to 06-JUN-08 00:39:00 (CST-6)
Location: TAMA
Magnitude: 55.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Report received from the Tama RWIS site.

Thunderstorm Wind in BREMER, IOWA
From 06-JUN-08 00:55:00 to 06-JUN-08 00:55:00 (CST-6)
Location: TRIPOLI
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Flash Flood in MADISON, IOWA
From 06-JUN-08 00:10:00 to 06-JUN-08 03:15:00 (CST-6)
Location: PATTERSON
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Debris was washing into the streets from the Middle River.

Flash Flood in POLK, IOWA
From 06-JUN-08 00:10:00 to 06-JUN-08 04:15:00 (CST-6)
Location: DES MOINES
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Debris over the road on Keo Way.  Cars damaged from driving over large debris.

Flash Flood in POLK, IOWA
From 06-JUN-08 00:29:00 to 06-JUN-08 04:15:00 (CST-6)
Location: URBANDALE
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Waist high water in the road near 47th and 48th Streets between Hickman and Beaver Crest.  Report received from KCCI TV.

Flash Flood in MADISON, IOWA
From 06-JUN-08 00:41:00 to 06-JUN-08 03:15:00 (CST-6)
Location: PATTERSON
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water over the road at Cumming Road and Quail Ridge Ave.

Flash Flood in STORY, IOWA
From 06-JUN-08 00:42:00 to 06-JUN-08 04:15:00 (CST-6)
Location: STORY CITY
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flooding of a Creek in town prompted moving of several cars from area businesses.

Flash Flood in STORY, IOWA
From 06-JUN-08 01:54:00 to 06-JUN-08 04:15:00 (CST-6)
Location: CAMBRIDGE
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Flash flooding of the South Skunk River and a creek east of town.  Residents were evacuated from a few homes.

Flash Flood in STORY, IOWA
From 06-JUN-08 02:30:00 to 06-JUN-08 05:30:00 (CST-6)
Location: CAMBRIDGE
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Significant flooding in Cambridge. Twelve people were evacuated with home...basement...and street flooding and streets closed. Over four inches of rainfall reported.

Hail in UNION, IOWA
From 05-JUN-08 21:10:00 to 05-JUN-08 21:10:00 (CST-6)
Location: LORIMOR
Magnitude: 0.88 
Property damage: 1.00K
Crop damage: 5.00K
Reported by: Trained Spotter

Thunderstorm Wind in DECATUR, IOWA
From 05-JUN-08 22:30:00 to 05-JUN-08 22:30:00 (CST-6)
Location: DECATUR CITY
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Windows were blown out of a building.  Several trees were down and a camper was damaged.

Thunderstorm Wind in DECATUR, IOWA
From 05-JUN-08 22:40:00 to 05-JUN-08 22:40:00 (CST-6)
Location: VAN WERT
Magnitude: 57.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Power lines were downed near Van Wert.

Thunderstorm Wind in DECATUR, IOWA
From 05-JUN-08 22:45:00 to 05-JUN-08 22:45:00 (CST-6)
Location: VAN WERT
Magnitude: 57.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Power poles were leaning east of Weldon.

Thunderstorm Wind in DECATUR, IOWA
From 05-JUN-08 22:50:00 to 05-JUN-08 22:50:00 (CST-6)
Location: LEON
Magnitude: 57.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Power lines and tree limbs were down in town.

High Wind in POCAHONTAS, IOWA
From 05-JUN-08 19:58:00 to 05-JUN-08 23:59:00 (CST-6)
Magnitude: 57.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Law Enforcement

High winds blew a window out in Fonda.

High Wind in POCAHONTAS, IOWA
From 05-JUN-08 19:58:00 to 05-JUN-08 23:59:00 (CST-6)
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

High winds caused minor damage to a barn.

Thunderstorm Wind in CASS, IOWA
From 05-JUN-08 19:23:00 to 05-JUN-08 19:23:00 (CST-6)
Location: ANITA MUNI ARPT
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An 8 to 9 inch tree was downed.

Thunderstorm Wind in WARREN, IOWA
From 05-JUN-08 23:13:00 to 05-JUN-08 23:13:00 (CST-6)
Location: LIBERTY CENTER
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several trees were blown down east of Liberty Center.