A very intense upper low was located over the southwest U.S. and lifted northeast during the weekend of the 24th into the morning of the 26th.  The seasons first strong push of deep moisture moved into Iowa on the 25th with surface temperatures warming into the mid 80s and dew points surging into the upper 60s to low 70s.  Precipitable water values were near 1.5 inches.  The dry slot pushed north across the area the previous night as the warm front lifted north.  The primary surface low was located over northern Minnesota.  A cold front extended south from the low into northwest Iowa.  The airmass became very unstable by the mid afternoon hours.  MUCAPE rose to between 4000 and 5000 J/kg.  Lifted indices fell to -8 to -11 C.  There was a considerable amount of both DCAPE at 1000-1500 J/kg and cape in the -10 to-30 C. layer of the atmoshpere, between 400 and 600 J/kg.  The freezing level was around 13,200 feet.  The environment was quite sheared with effective shear in the 40 to 50 kt range.  LCL values were between 1000 and 1500 meters.  The airmass was initially capped.  During the late afternoon hours, a small cluster of thunderstorms formed over north central into northeast Iowa.  The storms became severe very quickly.  Initially, the storms dropped hail up to golf ball in size.  One became a strong super cell and produced a major tornado. This cell, in addition to being tornadic, also produced hail of baseball to softball in size and winds in excess of 90 MPH.  The tornado track was from approximately 2 miles south of Aplington to Parkersburg, then continued to New Hartford and across northern Black Hawk County.  The average path width ranged from 0.6 to 0.7 miles near Parkersburg to just north of New Hartford.  The path constricted to near one quarter mile wide east of New Hartford to north of Waterloo.  The width then increased to near 1.2 miles wide north of Dunkerton before dissipating near the Black Hawk and Buchanan County line.  The tornado was on the ground for approximately 43 miles.  In addition to the main tornado, a satellite tornado was observed by storm chasers and one off duty NWS employee.  It was located south of the main tornado and was on the ground for a little over a mile in Grundy County.  Initial reports indicated 9 fatalities with 7 in Parkersburg (pop 1889) and 2 in New Hartford (pop 637).  There were at least 50 injuries, with 4 of those in critical condition.  Two of the fatalities occurred a few days after the tornado from injuries sustained in the tornado.  The last fatality occurred on 7 Nov.  A 61 year old female sustained injuries in the stairwell of her home when a 2 x 4 was thrown through her right side lung.  She was hospitalized and died several months later of complications.  Significant structural damage occurred across the southern end of Parkersburg and along a path to just north of New Hartford.  Numerous structures completely destroyed from Parkersburg to near New Hartford.  The tornado continued eastward to just north of the Waterloo and Cedar Falls area.  Significant damage also occurred north of Dunkerton where the tornado increased to its greatest path width. This storm also produced substantial straight line wind damage along the southern periphery of the storm just south of the tornado track.  News accounts indicated that a receipt from Parkersburg was found around 1915 CST 3 miles north of Prairie du Chien, WI, 109 miles to the northeast.  Receipits were also found in Clayton County at Elkader, and full scrapbook pages and photos were found in far northeast Bremer County at Sumner.  Preliminary estimates that straight line winds of 90 to 100 MPH occurred with this storm. At 1637 CST, the Waterloo Airport  recorded a 93 MPH wind gust. Survey results suggest that straight line wind damage was the cause of the severe damage at the recreational vehicle dealership north of Cedar Falls.  At least 627 homes were damaged, including 288 homes destroyed in Parkersburg, 88 in New Hartford, 15 in Hazelton and another 50 in Black Hawk County. In addition, 58 had major damage, 33 had moderate damage, 2 were inaccessible, and 93 damaged but able to be occupied. There were also 21 businesses destroyed. Governor Chet Culver declared both Butler and Black Hawk disaster areas with both given the State Declaration.  A Federal Disaster Declaration occurred two days later for both Butler and Black Hawk Counties.  The tornado was rated a low end EF5 by a Quick Response Team (QRT) in portions of Parkersburg and north of New Hartford with peak winds estimated at 205 MPH.  For historical reference, the last F5 tornado to hit Iowa was on 13 June 1976 in Boone and Story Counties in the town of Jordan, with a 21 mile path length.  The last F4 tornado to hit Iowa was in Union, Madison, and Dallas Counties with a 56 mile path length on 8 April 1999.  There was one other smaller tornado during the evening.  A tornado touched down in Clarke County and was on the ground for a short time southeast of Osceola.  After the initial thunderstorm area developed over north central and northeast Iowa, a large complex developed over southeast Nebraska. The two areas of storms filled in to form a squall line by the mid evening hours.  The complex over Nebraska then pushed east and northeast along the squall line.  A considerable amount of severe weather was generated during the evening as this occurred.  Along the squall line, high winds and hail were common with the dominant mode of severe weather being hail of up to golf ball in size.  As the MCS out of Nebraska advanced east, a tail extending south from the centroid took on a bow echo configuration and raced east across Iowa at 65 MPH.  Very high winds occurred with this feature with numerous locations reporting winds of 65 to 85 MPH.  Some of the higher winds included an 85 MPH wind gust in the Winterset area and numerous reports of 75 to 85 MPH winds from Madison, Dallas, Warren and Polk Counties.  Lightning struck a house in Ankeny.  The house was set on fire by the strike.

Thunderstorm Wind in ADAIR, IOWA
From 25-MAY-08 20:26:00 to 25-MAY-08 20:26:00 (CST-6)
Location: HOWE
Magnitude: 66.00 MG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Winds of 76 MPH were reported 7 miles northeast of Greenfield.

Thunderstorm Wind in MADISON, IOWA
From 25-MAY-08 20:33:00 to 25-MAY-08 20:33:00 (CST-6)
Location: WINTERSET
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in GUTHRIE, IOWA
From 25-MAY-08 20:34:00 to 25-MAY-08 20:34:00 (CST-6)
Location: STUART
Magnitude: 55.00 MG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MADISON, IOWA
From 25-MAY-08 20:40:00 to 25-MAY-08 20:40:00 (CST-6)
Location: WINTERSET
Magnitude: 74.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Public

Wind gusts of 85 MPH were reported in Winterset.

Thunderstorm Wind in GUTHRIE, IOWA
From 25-MAY-08 20:45:00 to 25-MAY-08 20:45:00 (CST-6)
Location: HERNDON
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Live wires were reported down.

Thunderstorm Wind in ADAIR, IOWA
From 25-MAY-08 20:50:00 to 25-MAY-08 20:50:00 (CST-6)
Location: ARBOR HILL
Magnitude: 55.00 MG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A wind gust of 63 MPH was recorded by a trained spotter.

Thunderstorm Wind in DALLAS, IOWA
From 25-MAY-08 20:51:00 to 25-MAY-08 20:51:00 (CST-6)
Location: DAWSON
Magnitude: 69.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm Wind in WARREN, IOWA
From 25-MAY-08 20:52:00 to 25-MAY-08 20:52:00 (CST-6)
Location: NORWALK
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Pea size hail also occurred.

Thunderstorm Wind in POLK, IOWA
From 25-MAY-08 20:57:00 to 25-MAY-08 20:57:00 (CST-6)
Location: (DSM)DES MOINES INTL
Magnitude: 56.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in POLK, IOWA
From 25-MAY-08 21:00:00 to 25-MAY-08 21:00:00 (CST-6)
Location: (DSM)DES MOINES INTL
Magnitude: 67.00 MG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in WARREN, IOWA
From 25-MAY-08 21:00:00 to 25-MAY-08 21:00:00 (CST-6)
Location: INDIANOLA
Magnitude: 68.00 MG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in POLK, IOWA
From 25-MAY-08 21:18:00 to 25-MAY-08 21:18:00 (CST-6)
Location: ANKENY
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Four inch diameter tree limbs were downed.

Thunderstorm Wind in JASPER, IOWA
From 25-MAY-08 21:32:00 to 25-MAY-08 21:32:00 (CST-6)
Location: COLFAX
Magnitude: 65.00 MG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Measured wind gusts of 75 MPH received.

Thunderstorm Wind in JASPER, IOWA
From 25-MAY-08 21:34:00 to 25-MAY-08 21:34:00 (CST-6)
Location: NEWTON
Magnitude: 51.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: AWOS

Newton AWOS reported winds gusts of 51 kts at 1034 PM.

Thunderstorm Wind in MARION, IOWA
From 25-MAY-08 21:34:00 to 25-MAY-08 21:34:00 (CST-6)
Location: PELLA
Magnitude: 51.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: AWOS

Pella AWOS measured a wind gust of 51 kts at 1034 PM.

Thunderstorm Wind in MAHASKA, IOWA
From 25-MAY-08 21:52:00 to 25-MAY-08 21:52:00 (CST-6)
Location: UNIVERSITY PARK
Magnitude: 65.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

High winds and very heavy rain was reported along with power loss.

Thunderstorm Wind in POWESHIEK, IOWA
From 25-MAY-08 21:53:00 to 25-MAY-08 21:53:00 (CST-6)
Location: MONTEZUMA
Magnitude: 51.00 MG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in POWESHIEK, IOWA
From 25-MAY-08 21:57:00 to 25-MAY-08 21:57:00 (CST-6)
Location: BROOKLYN
Magnitude: 51.00 MG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in POWESHIEK, IOWA
From 25-MAY-08 22:00:00 to 25-MAY-08 22:00:00 (CST-6)
Location: MONTEZUMA
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in UNION, IOWA
From 25-MAY-08 20:03:00 to 25-MAY-08 20:03:00 (CST-6)
Location: AFTON
Magnitude: 55.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Mesonet

Report from an RWIS site.

Tornado in GRUNDY, IOWA
From 25-MAY-08 15:48:00 to 25-MAY-08 15:50:00 (CST-6)
Location: FERN
Tornado F-scale: EF2
Property damage: 300.00K
Crop damage: 2.00K
Reported by: NWS Storm Survey

This was the initial tornado touchdown point.  The tornado continued on into Butler County.

Tornado in BUTLER, IOWA
From 25-MAY-08 15:50:00 to 25-MAY-08 16:16:00 (CST-6)
Location: APLINGTON
Tornado F-scale: EF5
Property damage: 75.00M
Crop damage: 75.00K
Reported by: NWS Storm Survey

First EF5 tornado in Iowa since 13 June 1976.  Nine deaths and 50 injuries occurred in Butler County.  Tornado moved out of Butler County and continued in Black Hawk County.

Tornado in BLACK HAWK, IOWA
From 25-MAY-08 16:16:00 to 25-MAY-08 16:58:00 (CST-6)
Location: BENSON
Tornado F-scale: EF2
Property damage: 25.00M
Crop damage: 155.00K
Reported by: NWS Storm Survey

Tornado moved in from Butler County and became very broad as it headed toward Fairbank.  Tornado lifted on the Buchanan County border.

Thunderstorm Wind in MAHASKA, IOWA
From 25-MAY-08 22:00:00 to 25-MAY-08 22:00:00 (CST-6)
Location: OSKALOOSA
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Debris from a pole barn were spread one half mile to the east and north.

Tornado in GRUNDY, IOWA
From 25-MAY-08 16:07:00 to 25-MAY-08 16:09:00 (CST-6)
Location: STOUT
Tornado F-scale: EF0
Property damage: 1.00K
Crop damage: 1.00K
Reported by: Storm Chaser

Iowa State storm chasers tracked a satellite tornado just south of the main EF-5 tornado.  It was located in Grundy County.

Funnel Cloud in TAMA, IOWA
From 25-MAY-08 20:52:00 to 25-MAY-08 20:52:00 (CST-6)
Location: GARWIN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A funnel cloud was sighted at 250th and Highway 63.

Hail in WRIGHT, IOWA
From 25-MAY-08 14:40:00 to 25-MAY-08 14:40:00 (CST-6)
Location: HOLMES
Magnitude: 1.25 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail was 2.5 miles northwest of Clarion.

Hail in FRANKLIN, IOWA
From 25-MAY-08 14:58:00 to 25-MAY-08 14:58:00 (CST-6)
Location: ALEXANDER
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WRIGHT, IOWA
From 25-MAY-08 15:05:00 to 25-MAY-08 15:05:00 (CST-6)
Location: DOWS
Magnitude: 0.88 
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Report was received from a KCCI TV viewer.  Time was estimated.

Hail in FRANKLIN, IOWA
From 25-MAY-08 15:21:00 to 25-MAY-08 15:21:00 (CST-6)
Location: COULTER
Magnitude: 1.00 
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CERRO GORDO, IOWA
From 25-MAY-08 15:25:00 to 25-MAY-08 15:25:00 (CST-6)
Location: ROCKWELL
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Report received from a KIMT TV viewer.

Thunderstorm Wind in POLK, IOWA
From 25-MAY-08 21:20:00 to 25-MAY-08 21:20:00 (CST-6)
Location: DES MOINES
Magnitude: 65.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Five and one half inch tree limbs were snapped by winds estimated at 75 MPH.

Thunderstorm Wind in WAYNE, IOWA
From 25-MAY-08 21:33:00 to 25-MAY-08 21:33:00 (CST-6)
Location: SEYMOUR
Magnitude: 52.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Outbuildings were blown down.

Thunderstorm Wind in APPANOOSE, IOWA
From 25-MAY-08 21:42:00 to 25-MAY-08 21:42:00 (CST-6)
Location: MORAVIA
Magnitude: 57.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A boat was ripped from anchor at the Rathbun Lake Marina.  Trees were blown down as well.

Thunderstorm Wind in APPANOOSE, IOWA
From 25-MAY-08 21:44:00 to 25-MAY-08 21:44:00 (CST-6)
Location: CENTERVILLE
Magnitude: 52.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Reports of outbuildings blown down.

Thunderstorm Wind in MAHASKA, IOWA
From 25-MAY-08 21:50:00 to 25-MAY-08 21:50:00 (CST-6)
Location: OSKALOOSA
Magnitude: 57.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A canopy was blown away by winds estimated at 60 to 70 MPH.

Thunderstorm Wind in MAHASKA, IOWA
From 25-MAY-08 21:55:00 to 25-MAY-08 21:55:00 (CST-6)
Location: OSKALOOSA
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Power lines were blown down on south 3rd St.

Thunderstorm Wind in MAHASKA, IOWA
From 25-MAY-08 22:10:00 to 25-MAY-08 22:10:00 (CST-6)
Location: FREMONT
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A large shed was demolished with the tin blown 3 blocks.  The front porch on a house was destroyed.  There was also other tree damage reported in the area.

Thunderstorm Wind in WAPELLO, IOWA
From 25-MAY-08 22:18:00 to 25-MAY-08 22:18:00 (CST-6)
Location: OTTUMWA
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Some damage was reported in downtown Ottumwa, along with half inch diameter hail.

Thunderstorm Wind in BLACK HAWK, IOWA
From 25-MAY-08 16:33:00 to 25-MAY-08 16:33:00 (CST-6)
Location: (ALO)WATERLOO MUNI A
Magnitude: 66.00 MG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in BLACK HAWK, IOWA
From 25-MAY-08 16:37:00 to 25-MAY-08 16:37:00 (CST-6)
Location: (ALO)WATERLOO MUNI A
Magnitude: 81.00 MG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: ASOS

The sustained windspeed was 65 MPH.

Thunderstorm Wind in GREENE, IOWA
From 25-MAY-08 19:55:00 to 25-MAY-08 19:55:00 (CST-6)
Location: RIPPEY
Magnitude: 69.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in UNION, IOWA
From 25-MAY-08 20:03:00 to 25-MAY-08 20:03:00 (CST-6)
Location: CRESTON
Magnitude: 52.00 MG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Mesonet

The Creston High School in the Union County Schoolnet reported winds of 60 MPH.

Thunderstorm Wind in CASS, IOWA
From 25-MAY-08 20:04:00 to 25-MAY-08 20:04:00 (CST-6)
Location: ATLANTIC ARPT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in ADAIR, IOWA
From 25-MAY-08 20:06:00 to 25-MAY-08 20:06:00 (CST-6)
Location: FONTANELLE
Magnitude: 63.00 MG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Mesonet

The Fontanelle School Net reported 72 MPH wind gusts.

Thunderstorm Wind in ADAIR, IOWA
From 25-MAY-08 20:24:00 to 25-MAY-08 20:24:00 (CST-6)
Location: ARBOR HILL
Magnitude: 55.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winds of 63 MPH were reported in Stuart.

Thunderstorm Wind in GRUNDY, IOWA
From 25-MAY-08 20:23:00 to 25-MAY-08 20:23:00 (CST-6)
Location: CONRAD
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Trees of 18 inch diameter were snapped in Conrad.

Thunderstorm Wind in AUDUBON, IOWA
From 25-MAY-08 20:30:00 to 25-MAY-08 20:30:00 (CST-6)
Location: VIOLA CENTER
Magnitude: 57.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Two power poles were downed.

Thunderstorm Wind in GUTHRIE, IOWA
From 25-MAY-08 20:35:00 to 25-MAY-08 20:35:00 (CST-6)
Location: BAGLEY
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

High winds downed a power pole.

Thunderstorm Wind in GUTHRIE, IOWA
From 25-MAY-08 20:40:00 to 25-MAY-08 20:40:00 (CST-6)
Location: BAGLEY
Magnitude: 57.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Power lines were downed by high winds.

Thunderstorm Wind in GUTHRIE, IOWA
From 25-MAY-08 20:45:00 to 25-MAY-08 20:45:00 (CST-6)
Location: BAGLEY
Magnitude: 57.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Power lines were downed.

Thunderstorm Wind in GUTHRIE, IOWA
From 25-MAY-08 20:45:00 to 25-MAY-08 20:45:00 (CST-6)
Location: HERNDON
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Power lines and trees were downed.

Thunderstorm Wind in WARREN, IOWA
From 25-MAY-08 20:55:00 to 25-MAY-08 20:55:00 (CST-6)
Location: MARTENSDALE
Magnitude: 61.00 EG
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A Morton building was destroyed.

Thunderstorm Wind in WARREN, IOWA
From 25-MAY-08 20:57:00 to 25-MAY-08 20:57:00 (CST-6)
Location: SCOTCH RIDGE
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Large trees were damaged along U.S. Highway 65 69.

Thunderstorm Wind in POLK, IOWA
From 25-MAY-08 21:00:00 to 25-MAY-08 21:00:00 (CST-6)
Location: DES MOINES
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tree was split in half by the high winds.

Thunderstorm Wind in MADISON, IOWA
From 25-MAY-08 20:40:00 to 25-MAY-08 20:40:00 (CST-6)
Location: EARLHAM
Magnitude: 57.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Trees, some up to 18 inches in diameter, were uprooted 4 miles south of Dexter.

Thunderstorm Wind in WARREN, IOWA
From 25-MAY-08 21:06:00 to 25-MAY-08 21:06:00 (CST-6)
Location: LACONA
Magnitude: 57.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two foot diameter trees were uprooted.

Thunderstorm Wind in BOONE, IOWA
From 25-MAY-08 21:04:00 to 25-MAY-08 21:04:00 (CST-6)
Location: BERKLEY
Magnitude: 57.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Power lines were downed at 319th and Clover in Boone.

Thunderstorm Wind in WAYNE, IOWA
From 25-MAY-08 21:15:00 to 25-MAY-08 21:15:00 (CST-6)
Location: LINEVILLE
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in GREENE, IOWA
From 25-MAY-08 21:16:00 to 25-MAY-08 21:16:00 (CST-6)
Location: DANA
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large trees were downed in Dana.

Thunderstorm Wind in POLK, IOWA
From 25-MAY-08 21:16:00 to 25-MAY-08 21:16:00 (CST-6)
Location: DES MOINES
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Multiple power lines were reported downed at multiple locations and reported to be arcing.

Thunderstorm Wind in WARREN, IOWA
From 25-MAY-08 21:16:00 to 25-MAY-08 21:16:00 (CST-6)
Location: NORWALK
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous reports of power lines down in Norwalk.

Hail in BUTLER, IOWA
From 25-MAY-08 19:22:00 to 25-MAY-08 19:22:00 (CST-6)
Location: PARKERSBURG
Magnitude: 1.00 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in BOONE, IOWA
From 25-MAY-08 19:23:00 to 25-MAY-08 19:23:00 (CST-6)
Location: BOONE
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Golf ball size hail was reported.

Hail in HARDIN, IOWA
From 25-MAY-08 19:23:00 to 25-MAY-08 19:23:00 (CST-6)
Location: NEW PROVIDENCE
Magnitude: 0.88 
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Reports from New Providence of nickel size hail.

Hail in BOONE, IOWA
From 25-MAY-08 19:24:00 to 25-MAY-08 19:24:00 (CST-6)
Location: BOONE MUNI ARPT
Magnitude: 1.00 
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in POLK, IOWA
From 25-MAY-08 19:24:00 to 25-MAY-08 19:24:00 (CST-6)
Location: SAYLORVILLE
Magnitude: 1.00 
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter size hail was reported at the Saylorville Information Center.

Hail in POLK, IOWA
From 25-MAY-08 19:25:00 to 25-MAY-08 19:25:00 (CST-6)
Location: ORALABOR
Magnitude: 0.88 
Property damage: 1.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in POLK, IOWA
From 25-MAY-08 19:29:00 to 25-MAY-08 19:29:00 (CST-6)
Location: ANKENY
Magnitude: 1.00 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HARDIN, IOWA
From 25-MAY-08 19:17:00 to 25-MAY-08 19:17:00 (CST-6)
Location: GARDEN CITY
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in POLK, IOWA
From 25-MAY-08 20:21:00 to 25-MAY-08 20:21:00 (CST-6)
Location: BONDURANT
Magnitude: 1.00 
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Quarter size hail was reported by a HAM radio operator 4 miles north of Bondurant and 5 miles east of Ankeny.

Hail in TAMA, IOWA
From 25-MAY-08 20:25:00 to 25-MAY-08 20:25:00 (CST-6)
Location: GLADBROOK
Magnitude: 1.00 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Quarter size hail was reported in Gladbrook.

Hail in GRUNDY, IOWA
From 25-MAY-08 20:28:00 to 25-MAY-08 20:28:00 (CST-6)
Location: BEAMAN
Magnitude: 0.88 
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Nickel size hail was reported between Conrad and Beaman.

Hail in TAMA, IOWA
From 25-MAY-08 20:52:00 to 25-MAY-08 20:52:00 (CST-6)
Location: TRAER MUNI ARPT
Magnitude: 1.00 
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter size hail was reported.

Hail in MONROE, IOWA
From 25-MAY-08 22:02:00 to 25-MAY-08 22:02:00 (CST-6)
Location: AVERY
Magnitude: 1.25 
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Very heavy rain was occurring on T61 on the Monroe/Wapello County line.

Heavy Rain in MAHASKA, IOWA
From 25-MAY-08 21:57:00 to 25-MAY-08 21:57:00 (CST-6)
Location: OSKALOOSA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Torrential rainfall with high winds were reported.

Lightning in POLK, IOWA
From 25-MAY-08 19:55:00 to 25-MAY-08 19:55:00 (CST-6)
Location: ANKENY
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Lightning struck a house in Ankeny, setting it on fire.

Tornado in CLARKE, IOWA
From 25-MAY-08 17:25:00 to 25-MAY-08 17:37:00 (CST-6)
Location: WELDON
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A relatively brief touchdown in fields, resulting in no damage.

Thunderstorm Wind in BUTLER, IOWA
From 25-MAY-08 16:17:00 to 25-MAY-08 16:17:00 (CST-6)
Location: NEW HARTFORD
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Thunderstorm winds downed numerous trees in the New Hartford area.  It appeared to be RFD damage.

Thunderstorm Wind in BLACK HAWK, IOWA
From 25-MAY-08 16:25:00 to 25-MAY-08 16:25:00 (CST-6)
Location: NORTH CEDAR
Magnitude: 70.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: NWS Employee

Numerous recreational vehicles in a dealership were destroyed.  This was likely due to straight line winds.

Thunderstorm Wind in HARDIN, IOWA
From 25-MAY-08 19:25:00 to 25-MAY-08 19:25:00 (CST-6)
Location: NEW PROVIDENCE
Magnitude: 61.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Roof damage occurred due to the high winds.

Hail in CERRO GORDO, IOWA
From 25-MAY-08 15:26:00 to 25-MAY-08 15:26:00 (CST-6)
Location: MASON CITY
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Dime to golf ball size hail nearly covered the ground.

Hail in CERRO GORDO, IOWA
From 25-MAY-08 15:36:00 to 25-MAY-08 15:36:00 (CST-6)
Location: CARTERSVILLE
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CERRO GORDO, IOWA
From 25-MAY-08 15:40:00 to 25-MAY-08 15:40:00 (CST-6)
Location: CARTERSVILLE
Magnitude: 1.50 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Report came from the intersection of Vine and 150th.

Hail in BLACK HAWK, IOWA
From 25-MAY-08 16:20:00 to 25-MAY-08 16:20:00 (CST-6)
Location: FINCHFORD
Magnitude: 4.25 
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A viewer reported softball size hail in Finchford.

Hail in BLACK HAWK, IOWA
From 25-MAY-08 16:23:00 to 25-MAY-08 16:23:00 (CST-6)
Location: BOIES
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BREMER, IOWA
From 25-MAY-08 16:23:00 to 25-MAY-08 16:23:00 (CST-6)
Location: JANESVILLE
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BLACK HAWK, IOWA
From 25-MAY-08 16:29:00 to 25-MAY-08 16:29:00 (CST-6)
Location: BOIES
Magnitude: 1.00 
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BREMER, IOWA
From 25-MAY-08 16:31:00 to 25-MAY-08 16:31:00 (CST-6)
Location: DENVER
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in BLACK HAWK, IOWA
From 25-MAY-08 16:33:00 to 25-MAY-08 16:33:00 (CST-6)
Location: CEDAR CITY
Magnitude: 2.75 
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in POLK, IOWA
From 25-MAY-08 19:20:00 to 25-MAY-08 19:20:00 (CST-6)
Location: SAYLORVILLE
Magnitude: 1.00 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in POLK, IOWA
From 25-MAY-08 19:32:00 to 25-MAY-08 19:32:00 (CST-6)
Location: ANKENY
Magnitude: 0.88 
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HARDIN, IOWA
From 25-MAY-08 19:34:00 to 25-MAY-08 19:34:00 (CST-6)
Location: NEW PROVIDENCE
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in CASS, IOWA
From 25-MAY-08 20:03:00 to 25-MAY-08 20:03:00 (CST-6)
Location: WIOTA
Magnitude: 0.88 
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BLACK HAWK, IOWA
From 25-MAY-08 20:05:00 to 25-MAY-08 20:05:00 (CST-6)
Location: CEDAR FALLS
Magnitude: 1.00 
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Quarter size hail was reported.

Hail in POLK, IOWA
From 25-MAY-08 20:10:00 to 25-MAY-08 20:10:00 (CST-6)
Location: (DSM)DES MOINES INTL
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The hail was reported in the vicinity of old Army Post road, the International Airport, and 63rd St.

Hail in DALLAS, IOWA
From 25-MAY-08 20:12:00 to 25-MAY-08 20:12:00 (CST-6)
Location: BOONEVILLE
Magnitude: 0.88 
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Amateur Radio

HAM radio operator reported nickel size hail.

Hail in POLK, IOWA
From 25-MAY-08 20:17:00 to 25-MAY-08 20:17:00 (CST-6)
Location: FT DES MOINES
Magnitude: 1.75 
Property damage: 20.00K
Crop damage: 0.00K
Reported by: County Official

Hail was reported by Des Moines Public Safety.  It occurred at the intersection of Union and McKinley.

Hail in POLK, IOWA
From 25-MAY-08 20:19:00 to 25-MAY-08 20:19:00 (CST-6)
Location: FT DES MOINES
Magnitude: 1.00 
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter size hail was reported 3 miles south of Des Moines.

Thunderstorm Wind in HARDIN, IOWA
From 25-MAY-08 19:17:00 to 25-MAY-08 19:17:00 (CST-6)
Location: GARDEN CITY
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Damage was reported to a building.

Thunderstorm Wind in ADAIR, IOWA
From 25-MAY-08 20:00:00 to 25-MAY-08 20:00:00 (CST-6)
Location: BRIDGEWATER
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

EM reported 60 MPH winds with trees blown down.

Thunderstorm Wind in CASS, IOWA
From 25-MAY-08 20:04:00 to 25-MAY-08 20:04:00 (CST-6)
Location: ATLANTIC
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Employee

Widespread tree and power line damage was reported.

Thunderstorm Wind in ADAIR, IOWA
From 25-MAY-08 20:10:00 to 25-MAY-08 20:10:00 (CST-6)
Location: ORIENT
Magnitude: 57.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees and power lines were downed.

Hail in BREMER, IOWA
From 25-MAY-08 16:35:00 to 25-MAY-08 16:35:00 (CST-6)
Location: WAVERLY
Magnitude: 0.88 
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CLARKE, IOWA
From 25-MAY-08 16:59:00 to 25-MAY-08 16:59:00 (CST-6)
Location: LACELLE
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There was also a brief funnel cloud that had subsequently dissipated.

Hail in AUDUBON, IOWA
From 25-MAY-08 18:24:00 to 25-MAY-08 18:24:00 (CST-6)
Location: LARLAND
Magnitude: 0.88 
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GUTHRIE, IOWA
From 25-MAY-08 18:20:00 to 25-MAY-08 18:20:00 (CST-6)
Location: YALE
Magnitude: 1.75 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GUTHRIE, IOWA
From 25-MAY-08 18:50:00 to 25-MAY-08 18:50:00 (CST-6)
Location: FANSLERS
Magnitude: 1.75 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Report came from Springbrook State Park.

Hail in GUTHRIE, IOWA
From 25-MAY-08 18:58:00 to 25-MAY-08 18:58:00 (CST-6)
Location: FANSLERS
Magnitude: 1.75 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GUTHRIE, IOWA
From 25-MAY-08 18:59:00 to 25-MAY-08 18:59:00 (CST-6)
Location: FANSLERS
Magnitude: 1.75 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HAMILTON, IOWA
From 25-MAY-08 19:00:00 to 25-MAY-08 19:00:00 (CST-6)
Location: RANDALL
Magnitude: 1.00 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel to quarter size hail, along with 50 MPH winds were reported.

Hail in HAMILTON, IOWA
From 25-MAY-08 19:04:00 to 25-MAY-08 19:04:00 (CST-6)
Location: RANDALL
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BLACK HAWK, IOWA
From 25-MAY-08 16:39:00 to 25-MAY-08 16:39:00 (CST-6)
Location: BOIES
Magnitude: 4.00 
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Baseball to softball size hail was reported 7 miles north of Waterloo.

Hail in POLK, IOWA
From 25-MAY-08 19:43:00 to 25-MAY-08 19:43:00 (CST-6)
Location: DODGE FLD ARPT
Magnitude: 1.00 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: County Official

Quarter size hail was reported by the Des Moines Public Safety at the 7800 block of Beaver Drive.

Thunderstorm Wind in POLK, IOWA
From 25-MAY-08 21:03:00 to 25-MAY-08 21:03:00 (CST-6)
Location: DES MOINES
Magnitude: 65.00 MG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: ASOS