A complex weather situation was in place during the overnight hours of the 2nd into the morning of the 3rd.  A warm front was positioned to the south of Iowa.  Meanwhile, a secondary cold front dropped into the north central  U.S. and stretched from eastern Montana into southern Minnesota.  The upper flow was northwest and quite conducive for MCS development as considerable moisture transport took place over Iowa.  Initially, an area of thunderstorms formed over south central Iowa.  The storms remained below severe limits as they tracked east-southeast out of the CWA.  A strong thunderstorm complex developed over western South Dakota during the night and propagated southeast, along with the upper air northwest flow, into Iowa.  The MCS became linear in nature as it moved out of northwest Iowa into the central sections of the state.  Very heavy rainfall resulted in flash flooding in several counties, with urban street flooding along the length of the line.  Rainfall rates of one to two inches in one half hour or less were reported.  A few areas received 2 to 3 inches of rain.  Appanoose County was quite hard hit with water flowing over the roads two feet deep.  The main severe mode of the system was the high winds.  There were numerous reports of 60 to 70 MPH winds.  The entire length of the line produced 40 to 50 MPH winds however.  Hail was somewhat limited as the freezing level was over 14,000 feet.  Following the passage of the line, high winds became a problem as a wake low developed.  Winds gusted to 58 MPH in Story County at Colo and wind damage was reported in Polk County at Bondurant.

Thunderstorm Wind in DALLAS, IOWA
From 03-JUN-08 05:00:00 to 03-JUN-08 05:00:00 (CST-6)
Location: HADDEN HILL
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: NWS Employee

Winds were estimated at 60 MPH.

Hail in POLK, IOWA
From 03-JUN-08 05:18:00 to 03-JUN-08 05:18:00 (CST-6)
Location: FT DES MOINES
Magnitude: 1.00 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in POLK, IOWA
From 03-JUN-08 05:19:00 to 03-JUN-08 05:19:00 (CST-6)
Location: (DSM)DES MOINES INTL
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flood in DALLAS, IOWA
From 01-JUN-08 06:15:00 to 01-JUN-08 18:15:00 (CST-6)
Location: ADEL
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The Raccoon River was flooding over Highway 169.

Heavy Rain in WAPELLO, IOWA
From 03-JUN-08 05:30:00 to 03-JUN-08 06:14:00 (CST-6)
Location: OTTUMWA
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Street flooding was reported in Ottumwa.  A number of intersections and low lying areas were under water, including the intersection of Jefferson and Main.

Thunderstorm Wind in GUTHRIE, IOWA
From 03-JUN-08 04:17:00 to 03-JUN-08 04:17:00 (CST-6)
Location: GUTHRIE CENTER
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree damage was reported with 10 to 12 inch limbs down.

Hail in ADAIR, IOWA
From 03-JUN-08 04:30:00 to 03-JUN-08 04:30:00 (CST-6)
Location: HOWE
Magnitude: 1.00 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in WARREN, IOWA
From 03-JUN-08 05:03:00 to 03-JUN-08 05:03:00 (CST-6)
Location: PROLE
Magnitude: 1.25 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Report received from KCCI television.

Thunderstorm Wind in DALLAS, IOWA
From 03-JUN-08 04:54:00 to 03-JUN-08 04:54:00 (CST-6)
Location: ADEL
Magnitude: 48.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: NWS Employee

Fifty to 60 MPH winds were reported with minor tree damage.

Thunderstorm Wind in POLK, IOWA
From 03-JUN-08 05:04:00 to 03-JUN-08 05:04:00 (CST-6)
Location: WINDSOR HGTS
Magnitude: 53.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: NWS Employee

Four inch diameter limbs down.

Thunderstorm Wind in WAPELLO, IOWA
From 03-JUN-08 06:24:00 to 03-JUN-08 06:24:00 (CST-6)
Location: EDDYVILLE
Magnitude: 50.00 MG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Mesonet

High Wind in STORY, IOWA
From 03-JUN-08 07:30:00 to 03-JUN-08 08:30:00 (CST-6)
Magnitude: 50.00 MG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Mesonet

A 58 MPH wind was measured by a mesonet site in Colo.

Thunderstorm Wind in WARREN, IOWA
From 03-JUN-08 05:27:00 to 03-JUN-08 05:27:00 (CST-6)
Location: HARTFORD
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hartford Law Enforcement reported 60 MPH winds and heavy rain.

Thunderstorm Wind in POWESHIEK, IOWA
From 03-JUN-08 05:57:00 to 03-JUN-08 05:57:00 (CST-6)
Location: GRINNELL ARPT
Magnitude: 56.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Mesonet

Flash Flood in APPANOOSE, IOWA
From 03-JUN-08 05:00:00 to 03-JUN-08 10:00:00 (CST-6)
Location: CLARKDALE
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: County Official

Water from a creek flooded 493rd street.  Also 176th ave four miles northeast of Centerville was flooded.

Flood in TAMA, IOWA
From 01-JUN-08 08:44:00 to 01-JUN-08 17:45:00 (CST-6)
Location: HAVEN
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

All roads in and out of Chelsea were impassible due to flooding along the Iowa River.

Flash Flood in BOONE, IOWA
From 03-JUN-08 05:11:00 to 03-JUN-08 10:19:00 (CST-6)
Location: MOINGONA
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Street flooding was reported with stalled cars. Water was running in fields near the Boone Story county border.

Flash Flood in MARION, IOWA
From 03-JUN-08 05:00:00 to 03-JUN-08 12:15:00 (CST-6)
Location: HAMILTON
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: County Official

Numerous secondary roads were under water from flooded creeks.

Flash Flood in MARION, IOWA
From 03-JUN-08 07:50:00 to 03-JUN-08 12:15:00 (CST-6)
Location: KNOXVILLE
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roads were closed at McKimber Drive and 170th with water running over the road.

Flash Flood in POLK, IOWA
From 03-JUN-08 05:34:00 to 03-JUN-08 08:34:00 (CST-6)
Location: URBANDALE
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Flash flooding was reported at Hickman and Merle Hay Rd, and on MLK near Douglas and Euclid avenues. The roads were flooded from curb to curb.

Flash Flood in BOONE, IOWA
From 03-JUN-08 05:50:00 to 03-JUN-08 10:19:00 (CST-6)
Location: ERICSON
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Several county gravel roads were under water across southeast Boone County.

Flash Flood in JASPER, IOWA
From 03-JUN-08 06:19:00 to 03-JUN-08 11:45:00 (CST-6)
Location: COLFAX
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Highway 117 was closed and street flooding was reported in Colfax.

Flash Flood in STORY, IOWA
From 03-JUN-08 05:35:00 to 03-JUN-08 10:42:00 (CST-6)
Location: HUXLEY
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

One to two feet of water was reported over Interstate 35 near mile marker 106.

Flash Flood in MAHASKA, IOWA
From 03-JUN-08 06:22:00 to 03-JUN-08 09:25:00 (CST-6)
Location: OSKALOOSA
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Street flooding was reported in Oskaloosa between 2nd and 3rd streets.

Flash Flood in POLK, IOWA
From 03-JUN-08 05:48:00 to 03-JUN-08 08:34:00 (CST-6)
Location: DES MOINES
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flooding was reported on 5th St south of Court Avenue.

Flash Flood in STORY, IOWA
From 03-JUN-08 05:50:00 to 03-JUN-08 10:42:00 (CST-6)
Location: KELLEY
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Six inches of water was over County Road 57.

Thunderstorm Wind in JASPER, IOWA
From 03-JUN-08 05:15:00 to 03-JUN-08 05:15:00 (CST-6)
Location: MINGO
Magnitude: 45.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Large tree reportedly downed in Mingo by KCCI TV.

High Wind in POLK, IOWA
From 03-JUN-08 07:00:00 to 03-JUN-08 08:00:00 (CST-6)
Magnitude: 57.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Power poles were downed due to high winds in the Bondurant area.

High Wind in POLK, IOWA
From 03-JUN-08 06:30:00 to 03-JUN-08 08:00:00 (CST-6)
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Large tree downed and tree limb damage caused by high winds in Windsor Heights.

Thunderstorm Wind in DALLAS, IOWA
From 03-JUN-08 04:45:00 to 03-JUN-08 04:45:00 (CST-6)
Location: ADEL
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Eight to 10 inch tree blown down with additional smaller limbs down.

Thunderstorm Wind in POWESHIEK, IOWA
From 03-JUN-08 06:04:00 to 03-JUN-08 06:04:00 (CST-6)
Location: GRINNELL ARPT
Magnitude: 58.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in DALLAS, IOWA
From 03-JUN-08 05:06:00 to 03-JUN-08 05:06:00 (CST-6)
Location: DALLAS CENTER
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Unknown

Thunderstorm Wind in POWESHIEK, IOWA
From 03-JUN-08 05:57:00 to 03-JUN-08 05:57:00 (CST-6)
Location: GRINNELL ARPT
Magnitude: 56.00 MG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in BOONE, IOWA
From 03-JUN-08 04:43:00 to 03-JUN-08 04:43:00 (CST-6)
Location: OGDEN
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The EM reported 60 MPH winds from Ogden to Berkley.

Thunderstorm Wind in WAPELLO, IOWA
From 03-JUN-08 06:38:00 to 03-JUN-08 06:38:00 (CST-6)
Location: OTTUMWA
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree limbs were downed in Ottumwa.