Thunderstorms produced large hail at several locations in northwest Iowa during the late afternoon and early evening of May 23rd. The storms also produce damaging winds at one location, flash flooding at another, and an isolated tornado.

Hail in PLYMOUTH, IOWA
From 23-MAY-16 15:38:00 to 23-MAY-16 15:38:00 (CST-6)
Location: HINTON
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tornado in SIOUX, IOWA
From 23-MAY-16 15:41:00 to 23-MAY-16 15:42:00 (CST-6)
Location: GRANVILLE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A brief tornado, a landspout, caused no reported damage.

Hail in PLYMOUTH, IOWA
From 23-MAY-16 16:35:00 to 23-MAY-16 16:35:00 (CST-6)
Location: MILLNERVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in PLYMOUTH, IOWA
From 23-MAY-16 16:40:00 to 23-MAY-16 16:40:00 (CST-6)
Location: MILLNERVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in SIOUX, IOWA
From 23-MAY-16 16:42:00 to 23-MAY-16 16:42:00 (CST-6)
Location: SHELDON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in PLYMOUTH, IOWA
From 23-MAY-16 16:55:00 to 24-MAY-16 20:00:00 (CST-6)
Location: LE MARS MUNI ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy rain caused flash flooding of several streets and also flooded railroad tracks.

Hail in LYON, IOWA
From 23-MAY-16 16:58:00 to 23-MAY-16 16:58:00 (CST-6)
Location: GEORGE SUDENGA ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in PLYMOUTH, IOWA
From 23-MAY-16 17:02:00 to 23-MAY-16 17:02:00 (CST-6)
Location: WESTFIELD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LYON, IOWA
From 23-MAY-16 17:05:00 to 23-MAY-16 17:05:00 (CST-6)
Location: GEORGE SUDENGA ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in OSCEOLA, IOWA
From 23-MAY-16 17:20:00 to 23-MAY-16 17:20:00 (CST-6)
Location: ALLENDORF
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Most hail was pea to dime size with a few the size of quarters.

Thunderstorm Wind in PLYMOUTH, IOWA
From 23-MAY-16 17:25:00 to 23-MAY-16 17:25:00 (CST-6)
Location: KINGSLEY
Magnitude: 71.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm winds caused tree damage, including up to 6 inch diameter branches broken off. The winds also blew weather equipment off a garage.

Hail in CHEROKEE, IOWA
From 23-MAY-16 17:43:00 to 23-MAY-16 17:43:00 (CST-6)
Location: MARCUS
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail was mostly pea size, but there were a few large stones up to ping pong ball size.

Hail in O'BRIEN, IOWA
From 23-MAY-16 17:55:00 to 23-MAY-16 17:55:00 (CST-6)
Location: GERMANTOWN
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LYON, IOWA
From 23-MAY-16 17:08:00 to 23-MAY-16 17:08:00 (CST-6)
Location: GEORGE SUDENGA ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter