Thunderstorms produced numerous events of large hail, damaging winds, flash flooding, and areal flooding across most of northwest Iowa from late morning through the evening of June 16th. There was also one brief tornado. The areal flooding was a longer term event and persisted through much of June 18th.

Thunderstorm Wind in DICKINSON, IOWA
From 16-JUN-14 15:43:00 to 16-JUN-14 15:43:00 (CST-6)
Location: LAKE PARK
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds caused tree damage.

Hail in O'BRIEN, IOWA
From 16-JUN-14 17:11:00 to 16-JUN-14 17:11:00 (CST-6)
Location: HARTLEY MUNI ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LYON, IOWA
From 16-JUN-14 18:17:00 to 16-JUN-14 18:17:00 (CST-6)
Location: LAKEWOOD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in PLYMOUTH, IOWA
From 16-JUN-14 20:03:00 to 16-JUN-14 21:00:00 (CST-6)
Location: CRAIG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain caused flash flooding of two county roads near an intersection, forcing closure of the intersection.

Flood in PLYMOUTH, IOWA
From 16-JUN-14 20:31:00 to 16-JUN-14 23:00:00 (CST-6)
Location: LE MARS MUNI ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Prolonged moderate to heavy rain cause flooding of streets in Le Mars, with water running over curbs.

Thunderstorm Wind in PLYMOUTH, IOWA
From 16-JUN-14 20:45:00 to 16-JUN-14 20:45:00 (CST-6)
Location: LE MARS
Magnitude: 52.00 EG
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds caused tree damage, including limbs up to 6 inches in diameter blown down. The winds were accompanied by small hail.

Thunderstorm Wind in WOODBURY, IOWA
From 16-JUN-14 21:48:00 to 16-JUN-14 21:48:00 (CST-6)
Location: LEEDS
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds caused tree damage. The winds were accompanied by small hail.

Thunderstorm Wind in WOODBURY, IOWA
From 16-JUN-14 21:55:00 to 16-JUN-14 21:55:00 (CST-6)
Location: SALIX
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds caused tree damage.

Heavy Rain in CHEROKEE, IOWA
From 16-JUN-14 18:00:00 to 16-JUN-14 23:14:00 (CST-6)
Location: CHEROKEE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Rainfall of 3.70 inches was measured.

Heavy Rain in BUENA VISTA, IOWA
From 16-JUN-14 18:00:00 to 16-JUN-14 23:30:00 (CST-6)
Location: LINN GROVE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Rainfall of 5.00 inches was measured.

Flood in OSCEOLA, IOWA
From 16-JUN-14 18:25:00 to 18-JUN-14 18:30:00 (CST-6)
Location: SIBLEY
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Persistent moderate to heavy rain caused flooding of fields and other lowlands, including several roads, homes, and businesses. This flooding lasted for almost two days, and was aggravated locally by additional storms during that time. Some roads were damaged or washed out.

Flood in DICKINSON, IOWA
From 16-JUN-14 18:25:00 to 18-JUN-14 18:30:00 (CST-6)
Location: LAKE PARK
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Persistent moderate to heavy rain caused flooding of fields and other lowlands, including several roads, homes, and businesses. This flooding lasted for almost two days, and was aggravated locally by additional storms during that time. Some roads were damaged or washed out.

Flood in SIOUX, IOWA
From 16-JUN-14 18:25:00 to 18-JUN-14 18:30:00 (CST-6)
Location: FAIRVIEW
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Persistent moderate to heavy rain caused flooding of fields and other lowlands, including several roads, homes, and businesses. This flooding lasted for almost two days, and was aggravated locally by additional storms during that time. Some roads were damaged or washed out.

Flood in O'BRIEN, IOWA
From 16-JUN-14 18:25:00 to 18-JUN-14 18:30:00 (CST-6)
Location: RITTER
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Persistent moderate to heavy rain caused flooding of fields and other lowlands, including several roads, homes, and businesses. This flooding lasted for almost two days, and was aggravated locally by additional storms during that time. Some roads were damaged or washed out.

Flood in CLAY, IOWA
From 16-JUN-14 18:25:00 to 18-JUN-14 18:30:00 (CST-6)
Location: EVERLY
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Persistent moderate to heavy rain caused flooding of fields and other lowlands, including several roads, homes, and businesses. This flooding lasted for almost two days, and was aggravated locally by additional storms during that time. Some roads were damaged or washed out.

Flood in PLYMOUTH, IOWA
From 16-JUN-14 18:25:00 to 18-JUN-14 18:30:00 (CST-6)
Location: AKRON
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Persistent moderate to heavy rain caused flooding of fields and other lowlands, including several roads, homes, and businesses. This flooding lasted for almost two days, and was aggravated locally by additional storms during that time. Some roads were damaged or washed out.

Thunderstorm Wind in WOODBURY, IOWA
From 16-JUN-14 21:47:00 to 16-JUN-14 21:47:00 (CST-6)
Location: SIOUX CITY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds caused tree damage, including four inch diameter branches blown down.

Hail in WOODBURY, IOWA
From 16-JUN-14 11:09:00 to 16-JUN-14 11:09:00 (CST-6)
Location: SALIX
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in PLYMOUTH, IOWA
From 16-JUN-14 12:19:00 to 16-JUN-14 12:19:00 (CST-6)
Location: STRUBLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in SIOUX, IOWA
From 16-JUN-14 12:30:00 to 16-JUN-14 12:30:00 (CST-6)
Location: ROCK VLY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds caused tree damage, including up to 8 inch diameter branches blown down. The winds were accompanied by large hail.

Hail in SIOUX, IOWA
From 16-JUN-14 12:30:00 to 16-JUN-14 12:30:00 (CST-6)
Location: ROCK VLY
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large hail was accompanied by damaging thunderstorm winds.

Hail in SIOUX, IOWA
From 16-JUN-14 12:35:00 to 16-JUN-14 12:35:00 (CST-6)
Location: ALTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Hail in LYON, IOWA
From 16-JUN-14 12:56:00 to 16-JUN-14 12:56:00 (CST-6)
Location: GEORGE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in O'BRIEN, IOWA
From 16-JUN-14 12:57:00 to 16-JUN-14 12:57:00 (CST-6)
Location: PRIMGHAR
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LYON, IOWA
From 16-JUN-14 13:13:00 to 16-JUN-14 13:13:00 (CST-6)
Location: GEORGE SUDENGA ARPT
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in OSCEOLA, IOWA
From 16-JUN-14 13:45:00 to 16-JUN-14 13:45:00 (CST-6)
Location: OCHEYEDAN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in OSCEOLA, IOWA
From 16-JUN-14 14:00:00 to 16-JUN-14 14:00:00 (CST-6)
Location: HARRIS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in DICKINSON, IOWA
From 16-JUN-14 15:45:00 to 16-JUN-14 15:45:00 (CST-6)
Location: SUPERIOR
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds snapped off 8 power poles.

Thunderstorm Wind in DICKINSON, IOWA
From 16-JUN-14 15:50:00 to 16-JUN-14 15:50:00 (CST-6)
Location: OKOBOJI
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm winds snapped off 8 power poles.

Hail in CLAY, IOWA
From 16-JUN-14 15:54:00 to 16-JUN-14 15:54:00 (CST-6)
Location: PETERSON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Thunderstorm Wind in DICKINSON, IOWA
From 16-JUN-14 16:00:00 to 16-JUN-14 16:00:00 (CST-6)
Location: SPIRIT LAKE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds caused tree damage, including at least one tree blown down. The winds were accompanied by marble size hail.

Thunderstorm Wind in BUENA VISTA, IOWA
From 16-JUN-14 16:45:00 to 16-JUN-14 16:45:00 (CST-6)
Location: SIOUX RAPIDS
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds caused widespread tree damage, including numerous trees blown down.

Thunderstorm Wind in LYON, IOWA
From 16-JUN-14 15:10:00 to 16-JUN-14 15:10:00 (CST-6)
Location: LITTLE ROCK
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds caused tree damage, including up to 3 inch diameter branches blown down.

Hail in DICKINSON, IOWA
From 16-JUN-14 15:15:00 to 16-JUN-14 15:15:00 (CST-6)
Location: OKOBOJI
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in CLAY, IOWA
From 16-JUN-14 15:26:00 to 16-JUN-14 15:26:00 (CST-6)
Location: LANGDON
Magnitude: 1.75 
Crop damage: 0.00K
Reported by: Trained Spotter

Golf ball size hail caused an unknown amount of damage to windows and vehicles.

Hail in DICKINSON, IOWA
From 16-JUN-14 15:37:00 to 16-JUN-14 15:37:00 (CST-6)
Location: TERRIL
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail was mostly quarter size or smaller, with a few stones as large as golf balls.

Thunderstorm Wind in DICKINSON, IOWA
From 16-JUN-14 15:37:00 to 16-JUN-14 15:37:00 (CST-6)
Location: LAKE PARK
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds caused tree damage.

Hail in WOODBURY, IOWA
From 16-JUN-14 16:53:00 to 16-JUN-14 16:53:00 (CST-6)
Location: SIOUX CITY
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Flood in CHEROKEE, IOWA
From 16-JUN-14 18:25:00 to 18-JUN-14 18:30:00 (CST-6)
Location: MARCUS
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Persistent moderate to heavy rain caused flooding of fields and other lowlands, including several roads, homes, and businesses. This flooding lasted for almost two days, and was aggravated locally by additional storms during that time. Some roads were damaged or washed out.

Flood in WOODBURY, IOWA
From 16-JUN-14 20:06:00 to 17-JUN-14 08:00:00 (CST-6)
Location: LEEDS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Persistent moderate to heavy rain caused flooding of some fields and other lowlands, including several roads. This flooding lasted into the daylight hours of June 17th after the rain subsided.

Flood in IDA, IOWA
From 16-JUN-14 20:06:00 to 17-JUN-14 08:00:00 (CST-6)
Location: HOLSTEIN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Persistent moderate to heavy rain caused flooding of some fields and other lowlands, including several roads. This flooding lasted into the daylight hours of June 17th after the rain subsided.

Flood in LYON, IOWA
From 16-JUN-14 18:25:00 to 18-JUN-14 18:30:00 (CST-6)
Location: GRANITE
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Persistent moderate to heavy rain caused flooding of fields and other lowlands, including several roads, homes, and businesses. This flooding lasted for almost two days, and was aggravated locally by additional storms during that time. Some roads were damaged or washed out.

Tornado in LYON, IOWA
From 16-JUN-14 14:43:00 to 16-JUN-14 14:44:00 (CST-6)
Location: ALVORD
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A brief tornado caused no reported damage.

Flood in BUENA VISTA, IOWA
From 16-JUN-14 18:25:00 to 18-JUN-14 18:30:00 (CST-6)
Location: LINN GROVE
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Persistent moderate to heavy rain caused flooding of fields and other lowlands, including several roads, homes, and businesses. This flooding lasted for almost two days, and was aggravated locally by additional storms during that time. Some roads were damaged or washed out.