Thunderstorms produced eleven tornadoes, several of them causing damage, which tracked wholly or partly in northwest Iowa during the afternoon and early evening of October 4th. There were also two reports of large hail and one report of non tornadic damaging thunderstorm winds.

Tornado in WOODBURY, IOWA
From 04-OCT-13 17:13:00 to 04-OCT-13 17:47:00 (CST-6)
Location: SLOAN
Tornado F-scale: EF2
Property damage: 400.00K
Reported by: NWS Storm Survey

A tornado, crossing into Woodbury County from Monona County Iowa, severely damaged at least two houses, collapsing two walls and blowing the roof off one of the houses. The tornado also destroyed or damaged numerous farm outbuildings and storage buildings, including several structures at a hog farm, and a large metal storage building. The tornado also destroyed open air buildings at a dairy farm. The tornado blew down power lines and poles, and caused considerable tree damage, including trees snapped off at their trunks. Corn crops were flattened in a few areas.

Tornado in CHEROKEE, IOWA
From 04-OCT-13 18:10:00 to 04-OCT-13 18:17:00 (CST-6)
Location: WASHTA
Tornado F-scale: EF1
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado, crossing into Chrerokee County from Woodbury County, damaged power poles, power lines, and trees.

Tornado in PLYMOUTH, IOWA
From 04-OCT-13 17:41:00 to 04-OCT-13 17:45:00 (CST-6)
Location: MILLNERVILLE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado crossed the Big Sioux River into Plymouth County from Union County in South Dakota. The tornado caused no reported damage in Plymouth County before dissipating.

Tornado in BUENA VISTA, IOWA
From 04-OCT-13 19:33:00 to 04-OCT-13 19:42:00 (CST-6)
Location: HANOVER
Tornado F-scale: EF1
Property damage: 1.20M
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado destroyed a garage and damaged several other buildings and farm equipment on a farm, and damaged trees and power lines. The tornado also damaged a metal building system. The tornado also severely damaged the roof and air conditioning units at a school near Alta, and destroyed bleachers at the school.

Tornado in PLYMOUTH, IOWA
From 04-OCT-13 17:50:00 to 04-OCT-13 17:52:00 (CST-6)
Location: MILLNERVILLE
Tornado F-scale: EF1
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado caused tree damage, including several trees snapped off at the trunks.

Tornado in PLYMOUTH, IOWA
From 04-OCT-13 17:55:00 to 04-OCT-13 17:56:00 (CST-6)
Location: ADAVILLE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A brief tornado caused tree damage, including branches blown down.

Tornado in WOODBURY, IOWA
From 04-OCT-13 17:35:00 to 04-OCT-13 18:10:00 (CST-6)
Location: CLIMBING HILL
Tornado F-scale: EF4
Property damage: 2.00M
Reported by: NWS Storm Survey

A tornado severely damaged or destroyed about 10 houses, collapsing most walls on a few of the houses, tearing most of the roofs off other houses, and shifting what was left of some houses off their foundations. The tornado caused significant damage to roofs, windows, and siding of additional houses. Numerous farm outbuildings, storage buildings, and a few silos were destroyed or severely damaged. The tornado also destroyed or damaged several pieces of farm equipment, caused significant tree damage, including numerous trunks snapped or uprooted and other trees stripped, and blew down power poles and lines. The tornado then crossed into Cherokee County.

Tornado in CHEROKEE, IOWA
From 04-OCT-13 18:41:00 to 04-OCT-13 18:43:00 (CST-6)
Location: QUIMBY
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A brief tornado caused no reported damage.

Tornado in CHEROKEE, IOWA
From 04-OCT-13 18:46:00 to 04-OCT-13 18:47:00 (CST-6)
Location: CHEROKEE MUNI ARPT
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A brief tornado caused no reported damage.

Tornado in CHEROKEE, IOWA
From 04-OCT-13 19:18:00 to 04-OCT-13 19:19:00 (CST-6)
Location: LARRABEE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A brief tornado caused no reported damage.

Tornado in CLAY, IOWA
From 04-OCT-13 19:47:00 to 04-OCT-13 19:48:00 (CST-6)
Location: MACLAY
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A brief tornado caused tree damage, including large branches blown down.

Hail in WOODBURY, IOWA
From 04-OCT-13 17:44:00 to 04-OCT-13 17:44:00 (CST-6)
Location: MOVILLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in PLYMOUTH, IOWA
From 04-OCT-13 18:09:00 to 04-OCT-13 18:09:00 (CST-6)
Location: KINGSLEY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in CHEROKEE, IOWA
From 04-OCT-13 18:28:00 to 04-OCT-13 18:28:00 (CST-6)
Location: QUIMBY
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: NWS Storm Survey

Thunderstorm winds caused tree damage, including large branches blown down.

Tornado in WOODBURY, IOWA
From 04-OCT-13 17:17:00 to 04-OCT-13 17:20:00 (CST-6)
Location: SLOAN
Tornado F-scale: EF1
Property damage: 20.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado destroyed or damaged outbuildings on a farm, and caused tree damage, including large branches blown down.