A warm frontal boundary lifted north across Iowa during the day on the 25th and was located over northern Iowa by the evening hours.  The airmass became very unstable to the south of the front as surface temperatures warmed into the 85 to 90 degree range, and dewpoints rose into the low to mid 70s.  This produced CAPE in the 4500 to 5000 J/kg range and a lifted index of -10 to -15 C.  The atmosphere was weakly sheared with 20 to 25 kts of bulk shear.  The freezing level was relatively low, around to just over 13,000 feet.  A small area of thunderstorms formed over northwest and north central Iowa by the late afternoon and early evening hours.  The storms became more widespread and formed into an MCS, which propagated southeast across the state and became severe.  The storms produced hail, high winds, and some flash flooding.  The primary mode of severe weather with this MCS was hail.  Reports of hail were widespread.  Much of the hail was in the three-quarter to one and one quarter inch range.  There were, however, several reports of large hail.  Three inch diameter hail fell northeast of Madrid in Boone County, with another report of two and one half inch diameter hail about 3 miles southwest of that.  Later on, another two and one half inch hail report was received in Story County.  Much of the larger hail occurred during the early stages of the event with golf ball size hail reported in Story, Dallas, and Marshall Counties as well.  During the late evening hours, golf ball size hail also fell in Polk and Warren Counties as a small area of stronger storms developed within the MCS.  The storms produced gusty winds in most areas as they passed, however much of the wind was below severe levels.  Winds gusted to 60 to 70 MPH during the later part of the severe event in Dallas, Polk and Warren Counties as a beta bow element dropped south across these counties.  Rainfall was very heavy with the storms and did cause some flash flooding.  Water was reported over Highway 17 near the Des Moines River in Dallas County, caused by flash flooding.  Fortunately, the weather had been relatively dry for the previous 2 weeks, so antecedent soil conditions were relatively dry.  Five inches of rain fell west of Polk City in Polk County in a 2 to 3 hour time frame.  There were several reports of rainfall in the 2 to 3 inch range in under three hours.  Although the system was not a tornadic system, there was one report of a funnel cloud in Grundy County.  Lightning struck a house in Polk County.  The house was damaged by the lightning wand it was started on fire.

Hail in HARDIN, IOWA
From 25-JUN-08 18:19:00 to 25-JUN-08 18:19:00 (CST-6)
Location: HUBBARD
Magnitude: 0.88 
Property damage: 1.00K
Crop damage: 15.00K
Reported by: Trained Spotter

Plenty of one half inch to nickel hail falling, along with very heavy rain.

Hail in STORY, IOWA
From 25-JUN-08 18:23:00 to 25-JUN-08 18:23:00 (CST-6)
Location: NEVADA
Magnitude: 1.50 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Quarter to ping pong ball sized hail was reported.

Lightning in POLK, IOWA
From 25-JUN-08 18:40:00 to 25-JUN-08 18:40:00 (CST-6)
Location: SAYLORVILLE
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A house was damaged due to a lightning strike.

Hail in STORY, IOWA
From 25-JUN-08 18:30:00 to 25-JUN-08 18:30:00 (CST-6)
Location: NEVADA
Magnitude: 2.00 
Property damage: 20.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Hail in POLK, IOWA
From 25-JUN-08 20:59:00 to 25-JUN-08 20:59:00 (CST-6)
Location: (DSM)DES MOINES INTL
Magnitude: 1.00 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported quarter size hail 2 blocks east of the Des Moines International Airport.

Hail in POLK, IOWA
From 25-JUN-08 21:03:00 to 25-JUN-08 21:03:00 (CST-6)
Location: FT DES MOINES
Magnitude: 1.00 
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Public

Public reported quarter size hail at the intersection of SW 9th and McKinley.

Hail in POLK, IOWA
From 25-JUN-08 21:10:00 to 25-JUN-08 21:10:00 (CST-6)
Location: FT DES MOINES
Magnitude: 1.25 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Public reported hail up to half dollar size with nickel size covering the ground at SW 9th and McKinley.

Hail in STORY, IOWA
From 25-JUN-08 18:28:00 to 25-JUN-08 18:28:00 (CST-6)
Location: COLO
Magnitude: 1.00 
Property damage: 2.00K
Crop damage: 10.00K
Reported by: Trained Spotter

Hail in STORY, IOWA
From 25-JUN-08 18:29:00 to 25-JUN-08 18:29:00 (CST-6)
Location: AMES
Magnitude: 1.00 
Property damage: 2.00K
Crop damage: 10.00K
Reported by: Broadcast Media

Report received from KCCI television.

Hail in STORY, IOWA
From 25-JUN-08 18:31:00 to 25-JUN-08 18:35:00 (CST-6)
Location: NEVADA
Magnitude: 1.00 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported quarter size hail in Nevada at 1835 CST, started 4 minutes earlier.

Hail in DALLAS, IOWA
From 25-JUN-08 18:33:00 to 25-JUN-08 18:43:00 (CST-6)
Location: MORAN
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 20.00K
Reported by: Trained Spotter

At 1843 CST a trained spotter reported hail near Minburn, mostly pea to penny size with some stones up to golf ball in size.  Hail lasted about 10 minutes.

Hail in MARSHALL, IOWA
From 25-JUN-08 18:33:00 to 25-JUN-08 18:33:00 (CST-6)
Location: ST ANTHONY
Magnitude: 1.75 
Property damage: 5.00K
Crop damage: 10.00K
Reported by: Trained Spotter

Hail in HAMILTON, IOWA
From 25-JUN-08 18:35:00 to 25-JUN-08 18:35:00 (CST-6)
Location: ELLSWORTH
Magnitude: 1.00 
Property damage: 3.00K
Crop damage: 10.00K
Reported by: Law Enforcement

Hail in STORY, IOWA
From 25-JUN-08 18:35:00 to 25-JUN-08 18:40:00 (CST-6)
Location: NEVADA
Magnitude: 1.75 
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Broadcast Media

WHO television relayed a report from a viewer of golf ball size hail in Nevada from 1835 to 1840 CST.

Hail in STORY, IOWA
From 25-JUN-08 18:37:00 to 25-JUN-08 18:37:00 (CST-6)
Location: NEVADA
Magnitude: 1.00 
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DALLAS, IOWA
From 25-JUN-08 18:42:00 to 25-JUN-08 18:42:00 (CST-6)
Location: MORAN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 10.00K
Reported by: Trained Spotter

Hail in GREENE, IOWA
From 25-JUN-08 19:22:00 to 25-JUN-08 19:22:00 (CST-6)
Location: DANA
Magnitude: 0.88 
Property damage: 1.00K
Crop damage: 5.00K
Reported by: Broadcast Media

KCCI television relayed a report from the public of nickel size hail in Dana.

Hail in GREENE, IOWA
From 25-JUN-08 19:34:00 to 25-JUN-08 19:34:00 (CST-6)
Location: GRAND JCT
Magnitude: 1.50 
Property damage: 5.00K
Crop damage: 10.00K
Reported by: Broadcast Media

Received from KCCI television.

Hail in GREENE, IOWA
From 25-JUN-08 20:00:00 to 25-JUN-08 20:00:00 (CST-6)
Location: RIPPEY
Magnitude: 0.88 
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in POLK, IOWA
From 25-JUN-08 20:00:00 to 25-JUN-08 20:00:00 (CST-6)
Location: DES MOINES
Magnitude: 0.88 
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The Des Moines fire department reported dime to nickel size hail at East 14th St and Court Ave.

Hail in POLK, IOWA
From 25-JUN-08 20:35:00 to 25-JUN-08 20:35:00 (CST-6)
Location: ASHAWA
Magnitude: 1.00 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter reported hail at the Hickman exit of Interstate 35/80.

Hail in WARREN, IOWA
From 25-JUN-08 20:37:00 to 25-JUN-08 20:37:00 (CST-6)
Location: CLARKSON
Magnitude: 1.00 
Property damage: 3.00K
Crop damage: 10.00K
Reported by: Emergency Manager

Nickel to quarter size hail was reported.

Hail in POLK, IOWA
From 25-JUN-08 20:44:00 to 25-JUN-08 20:44:00 (CST-6)
Location: URBANDALE
Magnitude: 1.75 
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported quarter to golf ball size hail at 86th and Douglas in Urbandale, and also at 100th and Swanson in Clive.

Hail in POLK, IOWA
From 25-JUN-08 20:45:00 to 25-JUN-08 20:45:00 (CST-6)
Location: ASHAWA
Magnitude: 1.00 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Report relayed by KCCI television.

Hail in DALLAS, IOWA
From 25-JUN-08 20:46:00 to 25-JUN-08 20:46:00 (CST-6)
Location: HADDEN HILL
Magnitude: 0.88 
Property damage: 1.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in WARREN, IOWA
From 25-JUN-08 21:07:00 to 25-JUN-08 21:07:00 (CST-6)
Location: NORWALK
Magnitude: 0.88 
Property damage: 3.00K
Crop damage: 5.00K
Reported by: Amateur Radio

Amateur Radio Operator reported penny to nickel size hail and winds gusting to near 60 MPH in Norwalk.

Hail in WARREN, IOWA
From 25-JUN-08 21:38:00 to 25-JUN-08 21:38:00 (CST-6)
Location: LACONA
Magnitude: 1.75 
Property damage: 5.00K
Crop damage: 10.00K
Reported by: Emergency Manager

Hail in CLARKE, IOWA
From 25-JUN-08 22:32:00 to 25-JUN-08 22:32:00 (CST-6)
Location: OSCEOLA MUNI ARPT
Magnitude: 0.88 
Property damage: 2.00K
Crop damage: 10.00K
Reported by: Trained Spotter

Pea to nickel hail along Interstate 35 near mile post 39.

Hail in WARREN, IOWA
From 25-JUN-08 21:10:00 to 25-JUN-08 21:10:00 (CST-6)
Location: NORWALK
Magnitude: 0.88 
Property damage: 3.00K
Crop damage: 10.00K
Reported by: Trained Spotter

Thunderstorm Wind in WARREN, IOWA
From 25-JUN-08 21:07:00 to 25-JUN-08 21:07:00 (CST-6)
Location: NORWALK
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in TAMA, IOWA
From 25-JUN-08 19:38:00 to 25-JUN-08 19:38:00 (CST-6)
Location: TOLEDO
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Toledo Fire Department reports wind gusting to 60 MPH about 2 miles north of Toledo.

Thunderstorm Wind in DALLAS, IOWA
From 25-JUN-08 20:38:00 to 25-JUN-08 20:40:00 (CST-6)
Location: HADDEN HILL
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

High winds lasted around 2 minutes.  No damage reported.

Thunderstorm Wind in DALLAS, IOWA
From 25-JUN-08 20:41:00 to 25-JUN-08 20:41:00 (CST-6)
Location: HADDEN HILL
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Thunderstorm Wind in DALLAS, IOWA
From 25-JUN-08 20:43:00 to 25-JUN-08 20:43:00 (CST-6)
Location: HADDEN HILL
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 5.00K
Reported by: Trained Spotter

Pea size hail accompanied the wind.

Thunderstorm Wind in POLK, IOWA
From 25-JUN-08 20:45:00 to 25-JUN-08 20:45:00 (CST-6)
Location: (DSM)DES MOINES INTL
Magnitude: 54.00 MG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in DALLAS, IOWA
From 25-JUN-08 20:53:00 to 25-JUN-08 20:53:00 (CST-6)
Location: HADDEN HILL
Magnitude: 59.00 MG
Property damage: 10.00K
Crop damage: 15.00K
Reported by: Trained Spotter

Large hail of unknown size fell with tree branches down.

Hail in POLK, IOWA
From 25-JUN-08 20:44:00 to 25-JUN-08 20:44:00 (CST-6)
Location: URBANDALE
Magnitude: 0.88 
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in WARREN, IOWA
From 25-JUN-08 21:10:00 to 25-JUN-08 21:10:00 (CST-6)
Location: NORWALK
Magnitude: 61.00 EG
Property damage: 20.00K
Crop damage: 10.00K
Reported by: Trained Spotter

Trained spotter reported 70 MPH winds and nickel size hail in Norwalk.

Heavy Rain in POLK, IOWA
From 25-JUN-08 18:00:00 to 25-JUN-08 20:23:00 (CST-6)
Location: POLK CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Storm total of 5 inches of rain relayed by KCCI television.

Hail in BOONE, IOWA
From 25-JUN-08 20:12:00 to 25-JUN-08 20:12:00 (CST-6)
Location: BERKLEY
Magnitude: 1.00 
Property damage: 1.00K
Crop damage: 10.00K
Reported by: Law Enforcement

Boone County law enforcement reported quarter size hail on Highway 169 at the Dallas/Boone County line.

Hail in POLK, IOWA
From 25-JUN-08 20:12:00 to 25-JUN-08 20:12:00 (CST-6)
Location: DES MOINES
Magnitude: 1.25 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Report from KCCI television from 2nd Ave and Interstate 80.

Funnel Cloud in GRUNDY, IOWA
From 25-JUN-08 19:07:00 to 25-JUN-08 19:07:00 (CST-6)
Location: WELLSBURG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported strong rotation and a developing funnel cloud on Highway T19 about 5 miles north of Wellsburg.

Hail in BOONE, IOWA
From 25-JUN-08 17:47:00 to 25-JUN-08 17:47:00 (CST-6)
Location: SHELDAHL
Magnitude: 1.00 
Property damage: 3.00K
Crop damage: 10.00K
Reported by: Trained Spotter

Hail in BOONE, IOWA
From 25-JUN-08 17:47:00 to 25-JUN-08 17:47:00 (CST-6)
Location: NAPIER
Magnitude: 1.50 
Property damage: 5.00K
Crop damage: 10.00K
Reported by: Fire Department/Rescue

Hail just smaller than golf ball size was reported at the intersection of 300th and Y ave.

Hail in BOONE, IOWA
From 25-JUN-08 17:50:00 to 25-JUN-08 17:50:00 (CST-6)
Location: SHELDAHL
Magnitude: 2.50 
Property damage: 20.00K
Crop damage: 10.00K
Reported by: Other Federal Agency

Hail in BOONE, IOWA
From 25-JUN-08 17:52:00 to 25-JUN-08 17:52:00 (CST-6)
Location: NAPIER
Magnitude: 3.00 
Property damage: 20.00K
Crop damage: 10.00K
Reported by: Other Federal Agency

Hail was oblong with the major axis up to 3.25 inches in length.

Hail in BOONE, IOWA
From 25-JUN-08 17:56:00 to 25-JUN-08 17:56:00 (CST-6)
Location: NAPIER
Magnitude: 1.50 
Property damage: 5.00K
Crop damage: 10.00K
Reported by: Fire Department/Rescue

Hail in POLK, IOWA
From 25-JUN-08 17:59:00 to 25-JUN-08 18:19:00 (CST-6)
Location: WINDSOR HGTS
Magnitude: 0.88 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

At 1819 CST a trained spooter reported hail about nickel size.  Hail had been falling for the last 20 minutes.

Hail in STORY, IOWA
From 25-JUN-08 18:01:00 to 25-JUN-08 18:01:00 (CST-6)
Location: KELLEY
Magnitude: 1.75 
Property damage: 5.00K
Crop damage: 10.00K
Reported by: Emergency Manager

Quarter to golf ball size hail was reported between Kelly and Slater.

Hail in STORY, IOWA
From 25-JUN-08 18:02:00 to 25-JUN-08 18:02:00 (CST-6)
Location: KELLEY
Magnitude: 1.00 
Property damage: 3.00K
Crop damage: 10.00K
Reported by: Broadcast Media

Report received via KCCI television.

Hail in DALLAS, IOWA
From 25-JUN-08 18:03:00 to 25-JUN-08 18:03:00 (CST-6)
Location: GRANGER
Magnitude: 0.88 
Property damage: 3.00K
Crop damage: 10.00K
Reported by: Broadcast Media

Dime to nickel size hail was reported by KCCI television.

Hail in STORY, IOWA
From 25-JUN-08 18:07:00 to 25-JUN-08 18:07:00 (CST-6)
Location: SHIPLEY
Magnitude: 1.00 
Property damage: 2.00K
Crop damage: 10.00K
Reported by: Emergency Manager

Hail in STORY, IOWA
From 25-JUN-08 18:08:00 to 25-JUN-08 18:08:00 (CST-6)
Location: AMES ARPT
Magnitude: 0.88 
Property damage: 2.00K
Crop damage: 10.00K
Reported by: Trained Spotter

Nickel to just shy of quarter size hail was reported by a spotter.

Hail in POLK, IOWA
From 25-JUN-08 18:11:00 to 25-JUN-08 18:11:00 (CST-6)
Location: HERROLD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 10.00K
Reported by: Amateur Radio

Penny size hail was reported at the intersection of Highway 17 and Highway 141 near Granger.

Hail in DALLAS, IOWA
From 25-JUN-08 18:18:00 to 25-JUN-08 18:18:00 (CST-6)
Location: GRANGER
Magnitude: 0.88 
Property damage: 1.00K
Crop damage: 10.00K
Reported by: Storm Chaser

Hail in STORY, IOWA
From 25-JUN-08 18:14:00 to 25-JUN-08 18:14:00 (CST-6)
Location: NEVADA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail reported by KCCI television at the public library.

Hail in STORY, IOWA
From 25-JUN-08 18:22:00 to 25-JUN-08 18:22:00 (CST-6)
Location: NEVADA
Magnitude: 1.75 
Property damage: 5.00K
Crop damage: 10.00K
Reported by: Broadcast Media

Report received from KCCI television.

Hail in STORY, IOWA
From 25-JUN-08 18:35:00 to 25-JUN-08 18:35:00 (CST-6)
Location: NEVADA
Magnitude: 2.60 
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Broadcast Media

KCCI relayed a report of 2.60 inch hail.

Hail in STORY, IOWA
From 25-JUN-08 19:19:00 to 25-JUN-08 19:19:00 (CST-6)
Location: HUXLEY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 5.00K
Reported by: Broadcast Media

KCCI television relayed a report from the public of three-quarter inch hail in Huxley.

Hail in BOONE, IOWA
From 25-JUN-08 19:52:00 to 25-JUN-08 19:52:00 (CST-6)
Location: BERKLEY
Magnitude: 1.25 
Property damage: 5.00K
Crop damage: 5.00K
Reported by: Law Enforcement

Boone County law enforcement reported hail up to 1.25 inches in diameter in Berkley.

Flash Flood in POLK, IOWA
From 25-JUN-08 20:40:00 to 26-JUN-08 00:15:00 (CST-6)
Location: POLK CITY
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Report of water over the road on Highway 17 and 122nd ave near the Des Moines River bridge.

Heavy Rain in WAPELLO, IOWA
From 25-JUN-08 21:53:00 to 25-JUN-08 22:21:00 (CST-6)
Location: (OTM)OTTUMWA INDSTRL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Rainfall of 2.04 inches fell in the periods from 2153 to 2221 CST, with 0.99 inches in nine minutes.

Thunderstorm Wind in WARREN, IOWA
From 25-JUN-08 21:03:00 to 25-JUN-08 21:03:00 (CST-6)
Location: NORWALK
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 5.00K
Reported by: Trained Spotter

Trained spotter reported winds gusting to 65 MPH with pea size hail in Norwalk.

Hail in STORY, IOWA
From 25-JUN-08 18:26:00 to 25-JUN-08 18:26:00 (CST-6)
Location: IOWA CENTER
Magnitude: 1.50 
Property damage: 5.00K
Crop damage: 15.00K
Reported by: Trained Spotter

A trained spotter reported hail of mostly penny size, but with a few up to 1.5 inches in diameter about 3 miles south of Nevada at the intersection of Highway F14 and 270th St.

Hail in POLK, IOWA
From 25-JUN-08 21:00:00 to 25-JUN-08 21:00:00 (CST-6)
Location: COMMERCE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported pea to penny size hail at I-35 and Grand Ave.