An unstable airmass was in place across Iowa with afternoon highs reaching well into the 80s, and dewpoint readings in the low to mid 70s.  CAPE rose to 2000 to 3000 J/kg.  Downdraft CAPE was around 900 to 1000 J/kg, with CAPE in the -10 to -30 C layer of the atmosphere in the 600 to 900 J/kg range.  Precipitable water increased to around 1.75 inches.  The freezing level was quite high at around 15,000 feet.  Fairly strong shear was present with 40 to 50 kts of effective shear by late afternoon.  A line of thunderstorms formed ahead of the cold front by late afternoon and moved east across the state through the evening hours.  Hail with the storms was generally quite small.  One inch diameter hail fell in Crawford County in Dow City.  The primary severe events from this system were high winds that occurred as the MCS progressed across the state.  Several locations reported gusts of 60 MPH or higher.  An 80 MPH gust was reported in Guthrie County at Yale and Bayard.  A 71 MPH wind gust occurred in Marion County.  Heavy rainfall was also of significance with flash flooding in Crawford County.  This was caused by a dam failure which flooded Highway 39.  Three inches of rain fell in 50 minutes in Dallas County.  There were numerous reports of around 2 inches of rain falling in Boone and Polk Counties.  Water ponding and low-land flooding was common.  One person was struck by lightning at the Denison Airport.  The person received minor injuries. Funnel clouds were sighted in both Crawford and Boone Counties.  Additional heavy rainfall events are included on 01 September 2014 entry.

Thunderstorm Wind in POCAHONTAS, IOWA
From 31-AUG-14 18:53:00 to 31-AUG-14 18:53:00 (CST-6)
Location: POCAHONTAS
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in AUDUBON, IOWA
From 31-AUG-14 19:12:00 to 31-AUG-14 19:12:00 (CST-6)
Location: AUDUBON
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in DALLAS, IOWA
From 31-AUG-14 19:58:00 to 31-AUG-14 19:58:00 (CST-6)
Location: DALLAS CENTER ARPT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Estimated wind of 60 MPH.

Tornado in CARROLL, IOWA
From 31-AUG-14 18:57:00 to 31-AUG-14 19:02:00 (CST-6)
Location: GLIDDEN
Tornado F-scale: EF0
Property damage: 2.00K
Crop damage: 7.00K
Reported by: NWS Storm Survey

This tornado formed on the leading edge of a QLCS and damaged mostly trees and crops along its path. One small open farm structure was destroyed. A distinct path was noted through corn fields.  Track also found and extended into Greene county using high resolution satellite imagery.

Thunderstorm Wind in CRAWFORD, IOWA
From 31-AUG-14 18:19:00 to 31-AUG-14 18:19:00 (CST-6)
Location: DENISON
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Campers were tipped over by high winds.

Thunderstorm Wind in HARDIN, IOWA
From 31-AUG-14 20:15:00 to 31-AUG-14 20:16:00 (CST-6)
Location: BUCKEYE
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Miso-vortex produced minor crop damage.  Damage was found and documented using high resolution satellite imagery.

Tornado in BUTLER, IOWA
From 31-AUG-14 20:39:00 to 31-AUG-14 20:42:00 (CST-6)
Location: APLINGTON
Tornado F-scale: EF0
Property damage: 20.00K
Crop damage: 2.00K
Reported by: Other Federal Agency

This tornado moved northeast and grazed the southeast corner of Aplington, hitting a farmstead on the edge of town.  Two outbuildings were severly damaged and trees were uprooted.  This tornado was found and rated using high resolution satellite imagery.

Tornado in BREMER, IOWA
From 31-AUG-14 21:02:00 to 31-AUG-14 21:03:00 (CST-6)
Location: JANESVILLE
Tornado F-scale: EF0
Property damage: 1.00K
Crop damage: 2.00K
Reported by: Other Federal Agency

This tornado crossed the path of another tornado and then hit a farmstead, doing some minor tree damage.  Crop damage was also noted along its path.  Tornado was found and rated using high resolution satellite imagery.

Thunderstorm Wind in GREENE, IOWA
From 31-AUG-14 19:02:00 to 31-AUG-14 19:05:00 (CST-6)
Location: ADAZA
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Other Federal Agency

This is a continuation of a miso-vortex that began in Calhoun county and entered into northern Greene county.  The weak circulation produced only minor crop damage.  Damage was found and documented using high resolution satellite imagery.

Tornado in WEBSTER, IOWA
From 31-AUG-14 19:19:00 to 31-AUG-14 19:25:00 (CST-6)
Location: LENA
Tornado F-scale: EF0
Property damage: 1.00K
Crop damage: 5.00K
Reported by: Other Federal Agency

Tornado entered Webster county from Greene county.  Tornado continued to head northeast and produced damage to an old grain silo.  The tornado circulation weakened and became somewhat ill-defined before taking and hard right turn before dissipating.  Tornado was found and rated using high resolution satellite imagery.

Thunderstorm Wind in STORY, IOWA
From 31-AUG-14 20:05:00 to 31-AUG-14 20:05:00 (CST-6)
Location: ROLAND
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Wind gust estimated at 60 MPH.

Thunderstorm Wind in CARROLL, IOWA
From 31-AUG-14 18:30:00 to 31-AUG-14 18:30:00 (CST-6)
Location: MANNING
Magnitude: 56.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous trees were blown down.

Tornado in HAMILTON, IOWA
From 31-AUG-14 19:47:00 to 31-AUG-14 19:49:00 (CST-6)
Location: ROSEDALE
Tornado F-scale: EF0
Property damage: 1.00K
Crop damage: 2.00K
Reported by: Other Federal Agency

This tornado moved into Hamilton county from Boone county.  The tornado narrowed its path in Hamilton county producing crop damage and destroying a lean-to before dissipating.  The tornado was found and rated using high resolution satellite imagery.

Thunderstorm Wind in GRUNDY, IOWA
From 31-AUG-14 20:41:00 to 31-AUG-14 20:41:00 (CST-6)
Location: WELLSBURG
Magnitude: 60.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

One to two foot diameter tree down. Six to 10 inch diameter tree limbs downed and one tree limb landed on power lines taking them down too.

Thunderstorm Wind in CALHOUN, IOWA
From 31-AUG-14 19:02:00 to 31-AUG-14 19:05:00 (CST-6)
Location: LOHRVILLE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Other Federal Agency

Miso-vortex was generally weak but had a brief period of more intense circulation along its path.  Damage was found and documented using high resolution satellite imagery.

Thunderstorm Wind in DALLAS, IOWA
From 31-AUG-14 19:41:00 to 31-AUG-14 19:41:00 (CST-6)
Location: WOODWARD
Magnitude: 43.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Very short but well defined miso-vortex that produced crop damage.  Damage was found and documented using high resolution satellite imagery.

Flash Flood in CRAWFORD, IOWA
From 31-AUG-14 18:42:00 to 31-AUG-14 22:45:00 (CST-6)
Location: DENISON
Flood cause: Heavy Rain
Property damage: 250.00K
Crop damage: 50.00K
Reported by: Emergency Manager

A dam failure occurred with Highway 39 closed due to flash flooding.

Thunderstorm Wind in WEBSTER, IOWA
From 31-AUG-14 19:22:00 to 31-AUG-14 19:22:00 (CST-6)
Location: FARNHAMVILLE
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Very short lived miso-vortex produced minor crop damage along its path.  Damage was found and documented using high resolution satellite imagery.

Tornado in WEBSTER, IOWA
From 31-AUG-14 19:22:00 to 31-AUG-14 19:25:00 (CST-6)
Location: ROBERTS
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 3.00K
Reported by: Other Federal Agency

Narrow tornado tracked just south of Highway 20 near Fort Dodge.  Tornado produce crop damage and crossed Highway 169 before dissipating.  Tornado was found and rated using high resolution satellite imagery.

Thunderstorm Wind in DALLAS, IOWA
From 31-AUG-14 19:50:00 to 31-AUG-14 19:50:00 (CST-6)
Location: ADEL
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A large tree was downed on a power line.

Heavy Rain in CRAWFORD, IOWA
From 31-AUG-14 17:00:00 to 31-AUG-14 19:19:00 (CST-6)
Location: KENWOOD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Rainfall since 1700 CST was 3.6 inches.

Tornado in WEBSTER, IOWA
From 31-AUG-14 19:35:00 to 31-AUG-14 19:41:00 (CST-6)
Location: DAYTON
Tornado F-scale: EF1
Property damage: 200.00K
Crop damage: 7.00K
Reported by: NWS Storm Survey

This small but potent tornado formed just over 3 miles north of Dayton and tracked nearly due east, destroying one hog confinement building and leaving a pronounced trail through multiple corn fields. The tornado weakened midway into its track, but still left a path 20 yards wide through several other corn fields before doing some minor tree damage at the end of its track.  Tornado was surveyed but track lengthened after high resolution satellite imagery showed additional damage and path length.

Thunderstorm Wind in WEBSTER, IOWA
From 31-AUG-14 19:23:00 to 31-AUG-14 19:23:00 (CST-6)
Location: LENA
Magnitude: 43.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Another very short lived miso-vortex with minor crop damage.  Damage was found and documented using high resolution satellite imagery.

Tornado in HARDIN, IOWA
From 31-AUG-14 20:18:00 to 31-AUG-14 20:19:00 (CST-6)
Location: IOWA FALLS MUNI ARPT
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Other Federal Agency

This short lived tornado occurred just west of the Iowa Falls Airport.  The circulation was broad for the duration of the tornado but swirls were very evident in the damage pattern across the agricultural fields.  This tornado was found and rated using high resolution satellite imagery.

Thunderstorm Wind in GREENE, IOWA
From 31-AUG-14 19:05:00 to 31-AUG-14 19:05:00 (CST-6)
Location: ADAZA
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Short lived miso-vortex that produced minor crop damage.  Damage was found and documented using high resolution satellite imagery.

Thunderstorm Wind in CALHOUN, IOWA
From 31-AUG-14 18:51:00 to 31-AUG-14 18:51:00 (CST-6)
Location: WIGHTMAN
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Very short miso-vortex noted in minor crop damage.  Damage was found and documented using high resolution satellite imagery.

Tornado in DALLAS, IOWA
From 31-AUG-14 19:31:00 to 31-AUG-14 19:50:00 (CST-6)
Location: PANTHER
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 4.00K
Reported by: Other Federal Agency

Longest track tornado of the event remained in rural areas of Dallas county.  Only damage was to crops along the path.  Tornado was found and rated using high resolution satellite imagery.

Tornado in HARDIN, IOWA
From 31-AUG-14 20:09:00 to 31-AUG-14 20:10:00 (CST-6)
Location: BUCKEYE
Tornado F-scale: EF1
Property damage: 100.00K
Crop damage: 5.00K
Reported by: Other Federal Agency

This tornado moved into Hardin county from Hamilton county.  This short segment did primarily crop damage but hit a farmstead before dissipating causing the destruction of two grain bins and badly damaging three outbuildings.  This tornado was found and rated using high resolution satellite imagery.

Tornado in HAMILTON, IOWA
From 31-AUG-14 19:42:00 to 31-AUG-14 19:51:00 (CST-6)
Location: STANHOPE
Tornado F-scale: EF0
Property damage: 1.00K
Crop damage: 6.00K
Reported by: Other Federal Agency

Tornado developed between Stratford and Stanhope and moved north northeast.  The tornado produced mainly crop and minor tree damage with some shingles removed from a house near the track.  This tornado merged with another tornado which began near Stratford before ending.  Tornado was found and rated using high resolution satellite imagery.

Tornado in HAMILTON, IOWA
From 31-AUG-14 19:58:00 to 31-AUG-14 20:03:00 (CST-6)
Location: KAMRAR
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Other Federal Agency

Narrow tornado formed about 4.5 miles east of Kamrar and moved northeast.  The tornado remained in open farmland for the duration of its life producing only damage to crops.  Tornado was found and rated using high resolution satellite imagery.

Heavy Rain in DALLAS, IOWA
From 31-AUG-14 19:40:00 to 31-AUG-14 20:10:00 (CST-6)
Location: DAWSON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Three inches of rain fell in a 50 minute period.

Tornado in GREENE, IOWA
From 31-AUG-14 19:11:00 to 31-AUG-14 19:16:00 (CST-6)
Location: FARLIN
Tornado F-scale: EF0
Property damage: 1.00K
Crop damage: 5.00K
Reported by: Other Federal Agency

Tornado traveled northeast through Greene county east of Churdan.  Encountered a farmstead where a small barn lost its roof.  Tornado was found and rated using high resolution satellite imagery.

Thunderstorm Wind in GUTHRIE, IOWA
From 31-AUG-14 19:15:00 to 31-AUG-14 19:15:00 (CST-6)
Location: BAYARD
Magnitude: 70.00 EG
Property damage: 25.00K
Crop damage: 50.00K
Reported by: Law Enforcement

Public estimated wind gusts.

Thunderstorm Wind in BUTLER, IOWA
From 31-AUG-14 20:53:00 to 31-AUG-14 20:53:00 (CST-6)
Location: SWANTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Very short but somewhat intense miso-vortex produced crop damage.  Damage was found and documented using high resolution satellite imagery.

Thunderstorm Wind in CALHOUN, IOWA
From 31-AUG-14 19:10:00 to 31-AUG-14 19:10:00 (CST-6)
Location: SOMERS
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Short lived miso-vortex the produced minor crop damage.  Damage found and documented using high resolution satellite imagery.

Thunderstorm Wind in WEBSTER, IOWA
From 31-AUG-14 19:19:00 to 31-AUG-14 19:19:00 (CST-6)
Location: FARNHAMVILLE
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Small miso-vortex which crossed from Calhoun county into Webster county and dissipated shortly thereafter.  Only minor crop damage.  Damage was found and documented using high resolution satellite imagery.

Thunderstorm Wind in WEBSTER, IOWA
From 31-AUG-14 19:18:00 to 31-AUG-14 19:18:00 (CST-6)
Location: FARNHAMVILLE
Magnitude: 43.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Very brief miso-vortex that produced only minor crop damage.  Damage was found and documented using high resolutions satellite imagery.

Thunderstorm Wind in DALLAS, IOWA
From 31-AUG-14 20:20:00 to 31-AUG-14 20:20:00 (CST-6)
Location: MORAN
Magnitude: 56.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in DALLAS, IOWA
From 31-AUG-14 19:40:00 to 31-AUG-14 19:40:00 (CST-6)
Location: PERRY
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Tornado in GREENE, IOWA
From 31-AUG-14 19:02:00 to 31-AUG-14 19:07:00 (CST-6)
Location: RALSTON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 5.00K
Reported by: Other Federal Agency

This is a continuation of a tornado from Carroll county.  This tornado remained in rural area of western Greene county doing mainly crop damage.  This extension of the path was found and rated using high resolutions satellite imagery.

Thunderstorm Wind in GUTHRIE, IOWA
From 31-AUG-14 19:04:00 to 31-AUG-14 19:04:00 (CST-6)
Location: BAYARD
Magnitude: 56.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Four to ten inch diameter tree branches down.

Thunderstorm Wind in CRAWFORD, IOWA
From 31-AUG-14 18:06:00 to 31-AUG-14 18:06:00 (CST-6)
Location: DENISON
Magnitude: 53.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Social Media

Ten inch diameter trees down.

Thunderstorm Wind in HARDIN, IOWA
From 31-AUG-14 20:18:00 to 31-AUG-14 20:19:00 (CST-6)
Location: IOWA FALLS MUNI ARPT
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Miso-vortex just west of the Iowa Fall Airport produced minor crop damage.  Damage was found and documented using high resolution satellite imagery.

Tornado in BUTLER, IOWA
From 31-AUG-14 20:51:00 to 31-AUG-14 20:53:00 (CST-6)
Location: NEW ALBION
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Other Federal Agency

Produced crop damage and the likely merged with another tornado before dissipating.  Tornado was found and rated using high resolution satellite imagery.

Tornado in BREMER, IOWA
From 31-AUG-14 21:17:00 to 31-AUG-14 21:24:00 (CST-6)
Location: KNITTEL
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Other Federal Agency

Tornado which moved eastward and producing crop damage.  Tornado moved north of the town of Readlyn before dissipating.  Tornado was found and rated using high resolution satellite imagery.

Tornado in WEBSTER, IOWA
From 31-AUG-14 19:19:00 to 31-AUG-14 19:24:00 (CST-6)
Location: FARNHAMVILLE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 6.00K
Reported by: Other Federal Agency

Tornado had an intermittent path with moderate to brief areas of extensive crop damage.   Tornado was found and rated using high resolution satellite imagery.

Thunderstorm Wind in HARDIN, IOWA
From 31-AUG-14 20:36:00 to 31-AUG-14 20:36:00 (CST-6)
Location: STEAMBOAT ROCK
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Recorded at a mesonet site.

Thunderstorm Wind in DALLAS, IOWA
From 31-AUG-14 19:58:00 to 31-AUG-14 19:58:00 (CST-6)
Location: DALLAS CENTER
Magnitude: 71.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Power poles were snapped in half by high winds.

Tornado in CARROLL, IOWA
From 31-AUG-14 18:45:00 to 31-AUG-14 18:48:00 (CST-6)
Location: CARROLL
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 10.00K
Reported by: Other Federal Agency

QLCS tornado that began just northeast of Carroll.  There were two separate vorticies with a common circulation.  Path became intermittent at the end.  Tornado was found and rated using high resolution satellite imagery.

Thunderstorm Wind in CRAWFORD, IOWA
From 31-AUG-14 18:19:00 to 31-AUG-14 18:20:00 (CST-6)
Location: ASPINWALL
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Other Federal Agency

Small miso-vortex associated with large thunderstorm complex in Crawford county.  Produced minor to occasionally moderate crop damage.  Damage was found and documented using high resolution satellite imagery.

Thunderstorm Wind in POLK, IOWA
From 31-AUG-14 20:25:00 to 31-AUG-14 20:25:00 (CST-6)
Location: URBANDALE
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Public

Limbs were blown off of trees.

Thunderstorm Wind in CERRO GORDO, IOWA
From 31-AUG-14 19:57:00 to 31-AUG-14 19:58:00 (CST-6)
Location: CLEAR LAKE LAKE
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Miso-vortex in northern Cerro Gordo county produced crop damage.  Damage was found and documented using high resolution satellite imagery.

Thunderstorm Wind in CRAWFORD, IOWA
From 31-AUG-14 18:21:00 to 31-AUG-14 18:21:00 (CST-6)
Location: DENISON
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

The public estimated a wind gust of 70 MPH.

Tornado in WEBSTER, IOWA
From 31-AUG-14 19:40:00 to 31-AUG-14 19:42:00 (CST-6)
Location: LEHIGH
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Tornado formed about 5 miles southeast of Lehigh and traveled through primarily wooded areas of the Des Moines river valley.  Tree damage was noted as well as crop damage in a few fields it crossed through.  The tornado then continued on into Hamilton county.  Tornado was found and rated using high resolution satellite imagery.

Thunderstorm Wind in GRUNDY, IOWA
From 31-AUG-14 20:40:00 to 31-AUG-14 20:40:00 (CST-6)
Location: WELLSBURG
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Minor tree damage reported.

Thunderstorm Wind in DALLAS, IOWA
From 31-AUG-14 19:55:00 to 31-AUG-14 19:55:00 (CST-6)
Location: DALLAS CENTER
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Ten to twelve inch tree limbs were blown down.

Tornado in HAMILTON, IOWA
From 31-AUG-14 19:59:00 to 31-AUG-14 20:01:00 (CST-6)
Location: BLAIRSBURG
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Tornado formed nearly 5 miles north of Blairsburg and travel northeast in rural farmland producing only crop damage.  This tornado then moved into Wright county.  The tornado was found and rated using high resolution satellite imagery.

Thunderstorm Wind in CRAWFORD, IOWA
From 31-AUG-14 18:23:00 to 31-AUG-14 18:24:00 (CST-6)
Location: VAIL
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 3.00K
Reported by: Other Federal Agency

Miso-vortex that produce moderate crop damage.  Damage was found and documented using high resolution satellite imagery.

Thunderstorm Wind in GREENE, IOWA
From 31-AUG-14 19:15:00 to 31-AUG-14 19:15:00 (CST-6)
Location: JEFFERSON
Magnitude: 52.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Public

Trees were blown down in Jefferson.

Thunderstorm Wind in CALHOUN, IOWA
From 31-AUG-14 19:05:00 to 31-AUG-14 19:05:00 (CST-6)
Location: ADAIR
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Short lived miso-vortex producing only minor crop damage.  Damage was found and documented using high resolution satellite imagery.

Tornado in HARDIN, IOWA
From 31-AUG-14 20:18:00 to 31-AUG-14 20:19:00 (CST-6)
Location: OWASA
Tornado F-scale: EF1
Property damage: 25.00K
Crop damage: 4.00K
Reported by: Other Federal Agency

Tornado formed 2 miles southwest of Owasa immediately hitting a farmstead destroying a grain bin and uprooting several trees.  The tornado then travel across open farmland for the remainder of its path.  The tornado was found and rated using high resolution satellite imagery.

Thunderstorm Wind in GREENE, IOWA
From 31-AUG-14 19:09:00 to 31-AUG-14 19:09:00 (CST-6)
Location: ADAZA
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Short-lived miso-vortex that produced minor crop damage.  Damage was found and documented using high resolution satellite imagery.

Thunderstorm Wind in CALHOUN, IOWA
From 31-AUG-14 18:58:00 to 31-AUG-14 18:58:00 (CST-6)
Location: WIGHTMAN
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Very short miso-vortex evident in crop damage.  Damage was found and documented using high resolution satellite imagery.

Tornado in WRIGHT, IOWA
From 31-AUG-14 20:01:00 to 31-AUG-14 20:07:00 (CST-6)
Location: GALT
Tornado F-scale: EF0
Property damage: 25.00K
Crop damage: 7.00K
Reported by: Other Federal Agency

This tornado moved into Wright county from Hamilton county.  The tornado continued to travel east northeast in rural areas of southern Wright county producing mainly crop damage.  It did destroyed two empty grain bins before dissipating.  The tornado was found and rated using high resolution satellite imagery.

Tornado in HARDIN, IOWA
From 31-AUG-14 20:11:00 to 31-AUG-14 20:13:00 (CST-6)
Location: BUCKEYE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

This short lived and narrow tornado remained in rural areas of western Hardin county producing only crop damage.  The tornado was found and rated using high resolution satellite imagery.

Tornado in HAMILTON, IOWA
From 31-AUG-14 19:50:00 to 31-AUG-14 19:51:00 (CST-6)
Location: KAMRAR
Tornado F-scale: EF0
Property damage: 95.00K
Crop damage: 5.00K
Reported by: Other Federal Agency

Brief tornado formed about 4 miles southwest of Kamrar and moved east southeast for its entire length.  The tornado destroyed 3 grain bins at a farmstead along with crop damage.  Tornado was found and rated using high resolution satellite imagery.

Tornado in HAMILTON, IOWA
From 31-AUG-14 20:06:00 to 31-AUG-14 20:07:00 (CST-6)
Location: WILLIAMS
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Other Federal Agency

This brief and narrow tornado formed a little over 3 miles southeast of Williams and moved east southeast.  It remained in open farmland producing some crop damage.  The tornado was found and rated using high resolution satellite imagery.

Heavy Rain in POLK, IOWA
From 31-AUG-14 21:14:00 to 31-AUG-14 21:14:00 (CST-6)
Location: CARNEY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Rainfall just short of 2 inches.

Flash Flood in WARREN, IOWA
From 31-AUG-14 21:30:00 to 31-AUG-14 23:00:00 (CST-6)
Location: NORWALK
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Three feet of standing water was reported over the road.

Thunderstorm Wind in GREENE, IOWA
From 31-AUG-14 19:16:00 to 31-AUG-14 19:16:00 (CST-6)
Location: JEFFERSON
Magnitude: 56.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous reports of trees down and power lines down across the county.

Thunderstorm Wind in HAMILTON, IOWA
From 31-AUG-14 19:57:00 to 31-AUG-14 19:57:00 (CST-6)
Location: ELLSWORTH
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Broad wind field, especially on south side of miso-vortex.  Produced minor crop damage along its path.  Damage was found and documented using high resolutions satellite imagery.

Thunderstorm Wind in CALHOUN, IOWA
From 31-AUG-14 19:16:00 to 31-AUG-14 19:17:00 (CST-6)
Location: FARNHAMVILLE
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Another in a series of short lived miso-vorticies with this convective system.  Produced minor crop damage.  Damage was found and documented using high resolution satellite imagery.

Thunderstorm Wind in CALHOUN, IOWA
From 31-AUG-14 19:19:00 to 31-AUG-14 19:19:00 (CST-6)
Location: FARNHAMVILLE
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Another very brief miso-vortex which passed into Webster county.  This vortex produced minor crop damage.  Damage was found and documented using high resolutions satellite imagery.

Thunderstorm Wind in WEBSTER, IOWA
From 31-AUG-14 19:18:00 to 31-AUG-14 19:18:00 (CST-6)
Location: FARNHAMVILLE
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Another very brief miso-vortex that produced minor crop damage.  Damage was found and documented using high resolution satellite imagery.

Heavy Rain in POLK, IOWA
From 31-AUG-14 21:15:00 to 31-AUG-14 21:15:00 (CST-6)
Location: POLK CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Rainfall of 1.82 inches reported at the NWS in Johnston.

Thunderstorm Wind in HARDIN, IOWA
From 31-AUG-14 20:25:00 to 31-AUG-14 20:25:00 (CST-6)
Location: IOWA FALLS MUNI ARPT
Magnitude: 57.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in MARION, IOWA
From 31-AUG-14 22:05:00 to 31-AUG-14 22:05:00 (CST-6)
Location: KNOXVILLE ARPT
Magnitude: 62.00 MG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: AWOS

Heavy Rain in BOONE, IOWA
From 31-AUG-14 20:03:00 to 31-AUG-14 21:48:00 (CST-6)
Location: MADRID
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Rainfall in the past hour and 45 minutes.

Tornado in CARROLL, IOWA
From 31-AUG-14 18:38:00 to 31-AUG-14 18:44:00 (CST-6)
Location: HALBUR
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 10.00K
Reported by: Other Federal Agency

QLCS tornado that moved north and merged with another tornado just prior to lifting.  Tornado found and rated using high resolution satellite imagery.

Thunderstorm Wind in GUTHRIE, IOWA
From 31-AUG-14 19:17:00 to 31-AUG-14 19:17:00 (CST-6)
Location: JAMAICA
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Short lived miso-vortex produced crop damage south of Jamaica.  Damage was found and documented using high resolution satellite imagery.

Thunderstorm Wind in HARDIN, IOWA
From 31-AUG-14 20:19:00 to 31-AUG-14 20:19:00 (CST-6)
Location: IOWA FALLS MUNI ARPT
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Short lived miso-vortex occurred just southeast of Iowa Falls Airport producing only minor crop damage.  Damage was found and documented using high resolution satellite imagery.

Tornado in BUTLER, IOWA
From 31-AUG-14 21:00:00 to 31-AUG-14 21:01:00 (CST-6)
Location: SHELL ROCK
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

This tornado developed and quickly moved out of the county and into Bremer county.  Only crop damage was noted with this segment of the tornado.  Tornado was found and rated using high resolution satellite imagery.

Tornado in BLACK HAWK, IOWA
From 31-AUG-14 21:04:00 to 31-AUG-14 21:07:00 (CST-6)
Location: FARMER
Tornado F-scale: EF0
Property damage: 1.00K
Crop damage: 2.00K
Reported by: Other Federal Agency

This tornado moved northeast on the southeast edge of Janesville.  This tornado produced primarily crop damage with some minor tree damage.

Tornado in SAC, IOWA
From 31-AUG-14 17:44:00 to 31-AUG-14 17:50:00 (CST-6)
Location: ODEBOLT
Tornado F-scale: EF0
Property damage: 90.00K
Crop damage: 7.00K
Reported by: Other Federal Agency

This tornado moved northward before encountering a farmstead west of Odebolt.  The tornado destroyed 4 grain bins at this site and damage a few augers before taking a 90 degree turn to the east for the remainder of its path.  Tornado was found and rated using high resolution satellite imagery.

Thunderstorm Wind in HARDIN, IOWA
From 31-AUG-14 20:34:00 to 31-AUG-14 20:34:00 (CST-6)
Location: CLEVES
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in STORY, IOWA
From 31-AUG-14 20:26:00 to 31-AUG-14 20:26:00 (CST-6)
Location: SLATER
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Employee

Several tree limbs down in town.

Flash Flood in POLK, IOWA
From 31-AUG-14 21:43:00 to 31-AUG-14 23:00:00 (CST-6)
Location: FT DES MOINES
Flood cause: Heavy Rain
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A report that southwest 9th and Luster Lane had two stalled cars with water 6 inches deep.

Thunderstorm Wind in POLK, IOWA
From 31-AUG-14 20:49:00 to 31-AUG-14 20:49:00 (CST-6)
Location: ALTOONA
Magnitude: 56.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter estimated 65 mph wind gust.

Thunderstorm Wind in HAMILTON, IOWA
From 31-AUG-14 19:59:00 to 31-AUG-14 20:04:00 (CST-6)
Location: ELLSWORTH
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Large trees down and power pole snapped.  Winds lasted 5 minutes.

Thunderstorm Wind in DALLAS, IOWA
From 31-AUG-14 19:56:00 to 31-AUG-14 19:56:00 (CST-6)
Location: DALLAS CENTER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Located at R16 and 215TH Street.

Tornado in WEBSTER, IOWA
From 31-AUG-14 19:26:00 to 31-AUG-14 19:29:00 (CST-6)
Location: GOWRIE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 5.00K
Reported by: Other Federal Agency

Tornado traveled east southeast along it entire path and had a broad circulation for much of its life.  Very well defined swirls and convergence noted along its path.  Tornado was found and rated using high resolution satellite data.

Tornado in HAMILTON, IOWA
From 31-AUG-14 19:42:00 to 31-AUG-14 19:45:00 (CST-6)
Location: HOMER
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Other Federal Agency

This tornado entered Hamilton county from Webster county.  The tornado continued in rural areas of western Hamilton county producing crop and some tree damage.  Tornado was found and rated using high resolution satellite imagery.

Lightning in CRAWFORD, IOWA
From 31-AUG-14 18:15:00 to 31-AUG-14 18:15:00 (CST-6)
Location: DENISON MUNI ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

One person was injured at the airport by lightning.

Heavy Rain in POLK, IOWA
From 31-AUG-14 23:59:00 to 31-AUG-14 23:59:00 (CST-6)
Location: WINDSOR HGTS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Rainfall of 2.03 inches.

Tornado in CRAWFORD, IOWA
From 31-AUG-14 17:24:00 to 31-AUG-14 17:42:00 (CST-6)
Location: DOW CITY
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 5.00K
Reported by: Other Federal Agency

First of many tornadoes to occur on this day.  Path was intermittent initially becoming more intense with time.  There was video of the parent circulation but path and rating  determined by high resolution satellite data.

Flash Flood in DALLAS, IOWA
From 31-AUG-14 21:06:00 to 31-AUG-14 23:00:00 (CST-6)
Location: PERRY
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous locations on Highway 44 throughout the county have water over the road, in some places 6 to 8 inches deep.  Highway 169 north of Minburn had water over the road.

Thunderstorm Wind in CARROLL, IOWA
From 31-AUG-14 18:51:00 to 31-AUG-14 18:51:00 (CST-6)
Location: MT CARMEL
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Small miso-vortex produced minor crop damage.  Vortex was found and documented using high resolution satellite imagery.

Thunderstorm Wind in GREENE, IOWA
From 31-AUG-14 19:10:00 to 31-AUG-14 19:10:00 (CST-6)
Location: ADAZA
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Another in a series of short lived miso-vorticies in Greene county.  Produced only minor crop damage.  The damage was found and documented using high resolution satellite imagery.

Heavy Rain in BOONE, IOWA
From 31-AUG-14 19:45:00 to 31-AUG-14 21:45:00 (CST-6)
Location: MADRID
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Rainfall of 2.35 inches in the past 2 hours.

Tornado in FRANKLIN, IOWA
From 31-AUG-14 20:07:00 to 31-AUG-14 20:10:00 (CST-6)
Location: OAKLAND
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Other Federal Agency

Tornado formed nearly 3 miles west of Popejoy and moved east northeast for the duration of the tornado.  The tornado remained in rural areas of Franklin county producing minor crop damage.  The tornado was found and rated using high resolution satellite imagery.

Tornado in HAMILTON, IOWA
From 31-AUG-14 19:52:00 to 31-AUG-14 19:54:00 (CST-6)
Location: KAMRAR
Tornado F-scale: EF0
Property damage: 75.00K
Crop damage: 4.00K
Reported by: Other Federal Agency

Brief tornado developed about 2.5 miles southwest of Kamrar and moved east southeast.  This tornado took part of the roof off a confinement building along with crop damage along its path.  Tornado was found and rated using high resolution satellite imagery.

Thunderstorm Wind in WEBSTER, IOWA
From 31-AUG-14 19:30:00 to 31-AUG-14 19:30:00 (CST-6)
Location: HARCOURT
Magnitude: 70.00 EG
Property damage: 50.00K
Crop damage: 50.00K
Reported by: Public

A garage was destroyed and several trees were downed in town.

Thunderstorm Wind in CALHOUN, IOWA
From 31-AUG-14 19:08:00 to 31-AUG-14 19:09:00 (CST-6)
Location: LOHRVILLE
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Another in a series of short lived miso-vorticies that occurred with this thunderstorm complex.  Produced only minor crop damage along its path.  Damage was found and documented using high resolution satellite imagery.

Thunderstorm Wind in CALHOUN, IOWA
From 31-AUG-14 19:17:00 to 31-AUG-14 19:17:00 (CST-6)
Location: FARNHAMVILLE
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Very short miso-vortex produced minor crop damage.  Damage was found and documented using high resolution satellite imagery.

Thunderstorm Wind in WEBSTER, IOWA
From 31-AUG-14 19:19:00 to 31-AUG-14 19:20:00 (CST-6)
Location: FARNHAMVILLE
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Miso-vortex crossed from Calhoun county into Webster county.  This vortex produced minor crop damage before dissipating.  Damage was found and documented using high resolution satellite imagery.

Thunderstorm Wind in CALHOUN, IOWA
From 31-AUG-14 19:00:00 to 31-AUG-14 19:02:00 (CST-6)
Location: WIGHTMAN
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Other Federal Agency

Small miso-vortex produced minor crop damage before entering into Greene county.  Damage was found and documented using high resolution satellite imagery.

Heavy Rain in POLK, IOWA
From 31-AUG-14 21:50:00 to 31-AUG-14 21:50:00 (CST-6)
Location: GRIMES
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Little Beaver Creek was reported to be bankful.

Thunderstorm Wind in JASPER, IOWA
From 31-AUG-14 21:48:00 to 31-AUG-14 21:48:00 (CST-6)
Location: PRAIRIE CITY
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Tornado in BOONE, IOWA
From 31-AUG-14 19:43:00 to 31-AUG-14 19:47:00 (CST-6)
Location: MACKEY
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 4.00K
Reported by: Other Federal Agency

This tornado developed in rural northern Boone county and moved northeast.  The tornado produce primarily crop damage although did uproot trees when crossing a small creek.  This tornado crossed into Hamilton county before dissipating.  Tornado was found and rated using high resolution satellite imagery.

Tornado in CRAWFORD, IOWA
From 31-AUG-14 18:26:00 to 31-AUG-14 18:33:00 (CST-6)
Location: VAIL
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 10.00K
Reported by: NWS Storm Survey

Three very distinct vortex paths rotating around a common center.  These tracks left very well defined paths in crops across eastern Crawford county.  Several small miso-vortices were also noted nearby.  This tornado was found and rated using high resolution satellite imagery.

Tornado in BUTLER, IOWA
From 31-AUG-14 20:49:00 to 31-AUG-14 20:52:00 (CST-6)
Location: PARKERSBURG
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 3.00K
Reported by: Other Federal Agency

Track meandered to the northeast with only crop damage noted. This tornado likely merged with another tornado before dissipating.  Tornado was found and rated using high resolution satellite imagery.

Thunderstorm Wind in BOONE, IOWA
From 31-AUG-14 19:38:00 to 31-AUG-14 19:38:00 (CST-6)
Location: LUTHER
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Minor crop damage produced by miso-vortex.  Damage was found and documented using high resolution satellite data.

Tornado in GRUNDY, IOWA
From 31-AUG-14 20:35:00 to 31-AUG-14 20:37:00 (CST-6)
Location: WELLSBURG
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Other Federal Agency

Produced only crop damage along its path.  Tornado was found and rated using high resolution satellite imagery.

Tornado in BREMER, IOWA
From 31-AUG-14 20:01:00 to 31-AUG-14 20:03:00 (CST-6)
Location: BABCOCK
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Other Federal Agency

This tornado produced crop damage as it moved to the east.  Another tornado crossed its path.  Tornado was found and rated using high resolution satellite imagery.

Thunderstorm Wind in WEBSTER, IOWA
From 31-AUG-14 19:22:00 to 31-AUG-14 19:22:00 (CST-6)
Location: FARNHAMVILLE
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Short lived miso-vortex that produced minor crop damage along its path.  Damage was found and documented using high resolution satellite imagery.

Tornado in GREENE, IOWA
From 31-AUG-14 19:15:00 to 31-AUG-14 19:19:00 (CST-6)
Location: CHURDAN
Tornado F-scale: EF0
Property damage: 1.00K
Crop damage: 5.00K
Reported by: Other Federal Agency

Tornado traveled northeast through Greene county in rural areas.  The tornado did some tree damage to a farmstead but otherwise only produced crop damage before moving into Webster county.  Tornado was found and rated using high resolution satellite imagery.

Thunderstorm Wind in GUTHRIE, IOWA
From 31-AUG-14 19:15:00 to 31-AUG-14 19:15:00 (CST-6)
Location: HERNDON
Magnitude: 70.00 EG
Property damage: 50.00K
Crop damage: 50.00K
Reported by: Law Enforcement

Power poles broken and lines down.

Thunderstorm Wind in CARROLL, IOWA
From 31-AUG-14 18:45:00 to 31-AUG-14 18:45:00 (CST-6)
Location: MANNING
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree limbs were blown down.

Funnel Cloud in BOONE, IOWA
From 31-AUG-14 19:38:00 to 31-AUG-14 19:38:00 (CST-6)
Location: MOINGONA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CRAWFORD, IOWA
From 31-AUG-14 17:45:00 to 31-AUG-14 17:45:00 (CST-6)
Location: DOW CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 10.00K
Reported by: Public

Thunderstorm Wind in WEBSTER, IOWA
From 31-AUG-14 19:23:00 to 31-AUG-14 19:23:00 (CST-6)
Location: FARNHAMVILLE
Magnitude: 60.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Six to ten inch tree limbs were reported down.

Thunderstorm Wind in GUTHRIE, IOWA
From 31-AUG-14 19:20:00 to 31-AUG-14 19:20:00 (CST-6)
Location: BAGLEY
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was blown over at 1247 Quail Road.

Thunderstorm Wind in DALLAS, IOWA
From 31-AUG-14 19:39:00 to 31-AUG-14 19:39:00 (CST-6)
Location: BOUTON
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Well defined miso-vortex that produced crop damage near Bouton.  Damage was found and documented using high resolution satellite imagery.

Thunderstorm Wind in BOONE, IOWA
From 31-AUG-14 19:33:00 to 31-AUG-14 19:33:00 (CST-6)
Location: BERKLEY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Estimated gust of 60 MPH.

Thunderstorm Wind in CRAWFORD, IOWA
From 31-AUG-14 18:15:00 to 31-AUG-14 18:15:00 (CST-6)
Location: DENISON
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: AWOS

Measured at the Denison AWOS.  Multiple trees down and an individual struck by lightning.

Tornado in BLACK HAWK, IOWA
From 31-AUG-14 21:12:00 to 31-AUG-14 21:17:00 (CST-6)
Location: BOIES
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Other Federal Agency

Tornado moved across northern Black Hawk county and produced crop damage.  Tornado was found and rated using high resolution satellite imagery.

Tornado in WEBSTER, IOWA
From 31-AUG-14 19:24:00 to 31-AUG-14 19:35:00 (CST-6)
Location: LANYON
Tornado F-scale: EF0
Property damage: 2.00K
Crop damage: 8.00K
Reported by: Other Federal Agency

Tornado traveled northeast for about half of its life before taking a sharp right turn and moving east southeast for remainder of track.  There was some minor damage to grain bins.  Tornado was found and rated using high resolution satellite imagery.

Tornado in HAMILTON, IOWA
From 31-AUG-14 19:40:00 to 31-AUG-14 19:47:00 (CST-6)
Location: STRATFORD
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 4.00K
Reported by: Other Federal Agency

The tornado formed just northeast of Stratford and moved northeast producing crop and minor tree damage.  This tornado merged with another tornado before dissipating.  Tornado was found at rated using high resolution satellite imagery.

Thunderstorm Wind in CARROLL, IOWA
From 31-AUG-14 18:40:00 to 31-AUG-14 18:40:00 (CST-6)
Location: TEMPLETON
Magnitude: 56.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree limbs down up to 2 inches in diameter.

Thunderstorm Wind in GUTHRIE, IOWA
From 31-AUG-14 19:15:00 to 31-AUG-14 19:15:00 (CST-6)
Location: FANSLERS
Magnitude: 69.00 EG
Property damage: 15.00K
Crop damage: 100.00K
Reported by: NWS Employee

Three whole trees of 12 inch diameter snapped.  Corn field flattened, with corn laying in same direction.

Tornado in CARROLL, IOWA
From 31-AUG-14 18:34:00 to 31-AUG-14 18:44:00 (CST-6)
Location: HALBUR
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 7.00K
Reported by: Other Federal Agency

QLCS tornado which moved northward and merged with another tornado just prior to ending.  The tornado severly damaged two grain bins along its path.  Tornado was found and rated using high resolution satellite imagery.

Flash Flood in DALLAS, IOWA
From 31-AUG-14 21:08:00 to 31-AUG-14 21:08:00 (CST-6)
Location: MINBURN
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Water was reported running over HWY 169 several inches deep.

Thunderstorm Wind in SAC, IOWA
From 31-AUG-14 18:25:00 to 31-AUG-14 18:26:00 (CST-6)
Location: CARNARVON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 2.00K
Reported by: Other Federal Agency

Miso-vortex noted in crop damage in broader strong wind field.  Circulation was quite nebulous.  Damage was found and documented using high resolution satellite imagery.

Thunderstorm Wind in GREENE, IOWA
From 31-AUG-14 19:11:00 to 31-AUG-14 19:13:00 (CST-6)
Location: CHURDAN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 3.00K
Reported by: Other Federal Agency

Miso-vortex with a slightly broader circulation and longer path.  Produced minor to moderate crop damage.  Damage was found and documented using high resolution satellite imagery.

Thunderstorm Wind in HAMILTON, IOWA
From 31-AUG-14 20:00:00 to 31-AUG-14 20:00:00 (CST-6)
Location: ELLSWORTH
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts of 60 MPH were reported.

Tornado in HAMILTON, IOWA
From 31-AUG-14 20:08:00 to 31-AUG-14 20:09:00 (CST-6)
Location: WILLIAMS
Tornado F-scale: EF0
Property damage: 10.00K
Crop damage: 4.00K
Reported by: Other Federal Agency

Tornado formed 4 miles southeast of Williams and moved initially north but made a sweeping right turn to the east southeast before leaving the county.  An outbuilding lost part of its roof with crop damage occurring along the path.  The tornado then entered Hardin county.  The tornado was found and rated using high resolution satellite imagery.

Tornado in HAMILTON, IOWA
From 31-AUG-14 19:46:00 to 31-AUG-14 19:52:00 (CST-6)
Location: STANHOPE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 4.00K
Reported by: Other Federal Agency

Tornado develop about 1 mile northeast of Stanhope and moved northeast.  The tornado did produce some minor tree damage along with crop damage along its path.  The tornado was quite narrow but broadened considerably prior to its dissipation.  Tornado was found and rated using high resolution satellite imagery.

Flash Flood in POLK, IOWA
From 31-AUG-14 21:50:00 to 31-AUG-14 23:00:00 (CST-6)
Location: SAYDELL
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Three feet of standing water was reported over the road at the intersection of NE 5th and NE 50th in Saylor Township.

Thunderstorm Wind in GRUNDY, IOWA
From 31-AUG-14 20:45:00 to 31-AUG-14 20:45:00 (CST-6)
Location: HOLLAND
Magnitude: 61.00 EG
Property damage: 100.00K
Crop damage: 25.00K
Reported by: Trained Spotter

At 9:45 p.m on 8/31 in Grundy County, Iowa just south of County HWY D25 on J Ave our farm lost 3/4 of it's machine shed roof on the SE side.  Part of the roof landed straight east short of 300 ft to 400 ft down driveway and the other part west in front of the shed but on the NE side.  More steel was to the NE about 300 ft to 400 ft and just missed our house.  The steel bent over the cable dish.  There was insulation splattered all over the garage and house to the NE of where roof went off and both garage doors were damaged.

Tornado in ADAIR, IOWA
From 31-AUG-14 20:23:00 to 31-AUG-14 20:24:00 (CST-6)
Location: ARBOR HILL
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Tornado formed as broader wind field narrowed into a circulation in northern Adair county.  Tornado produced only crop damage along its relatively short path.  Tornado was found and rated using high resolution satellite imagery.

Thunderstorm Wind in CALHOUN, IOWA
From 31-AUG-14 19:10:00 to 31-AUG-14 19:13:00 (CST-6)
Location: LOHRVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Miso-vortex with slightly stronger but broad circulation.  Produced a fair amount of crop damage along its path.  Damage was found and documented using high resolution satellite imagery.

Thunderstorm Wind in CALHOUN, IOWA
From 31-AUG-14 19:18:00 to 31-AUG-14 19:19:00 (CST-6)
Location: FARNHAMVILLE
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Small miso-vortex produced minor crop damage before crossing into Webster county.  Damage was found and documented using high resolution satellite imagery.

Thunderstorm Wind in WEBSTER, IOWA
From 31-AUG-14 19:20:00 to 31-AUG-14 19:20:00 (CST-6)
Location: FARNHAMVILLE
Magnitude: 48.00 EG
Property damage: 0.00K
Crop damage: 1.00K
Reported by: Other Federal Agency

Brief miso-vortex that produce minor crop damage along its path.  Damage was found and documented using high resolution satellite imagery.

Flash Flood in DALLAS, IOWA
From 31-AUG-14 21:20:00 to 31-AUG-14 23:00:00 (CST-6)
Location: MINBURN
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Water several feet deep over F31.