Multiple rounds of thunderstorms moved across southeast Minnesota during the afternoon and evening of May 31st. These storms developed in a complex surface pattern across the Upper Midwest as a pre-frontal surface trough, dry line and cold front all passed through the area. The storms primarily produced large hail, although there were also some wind gusts around 60 mph. The largest hail reported was golf ball sized near Kellogg (Wabasha County) and around Rochester (Olmsted County).

Hail in OLMSTED, MINNESOTA
From 31-MAY-13 20:37:00 to 31-MAY-13 20:37:00 (CST-6)
Location: PLEASANT GROVE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in OLMSTED, MINNESOTA
From 31-MAY-13 20:40:00 to 31-MAY-13 20:40:00 (CST-6)
Location: PREDMORE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Quarter sized hail covered the ground in Predmore.

Hail in OLMSTED, MINNESOTA
From 31-MAY-13 20:35:00 to 31-MAY-13 20:35:00 (CST-6)
Location: SIMPSON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Golf ball sized hail fell southeast of Rochester.

Hail in OLMSTED, MINNESOTA
From 31-MAY-13 20:45:00 to 31-MAY-13 20:45:00 (CST-6)
Location: LAIRD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter sized hail fell southwest of Eyota.

Hail in WINONA, MINNESOTA
From 31-MAY-13 21:21:00 to 31-MAY-13 21:21:00 (CST-6)
Location: ALTURA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in MOWER, MINNESOTA
From 31-MAY-13 21:44:00 to 31-MAY-13 21:44:00 (CST-6)
Location: LE ROY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Quarter sized hail just outside of Le Roy.

Thunderstorm Wind in FILLMORE, MINNESOTA
From 31-MAY-13 21:45:00 to 31-MAY-13 21:45:00 (CST-6)
Location: WHALAN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

An estimated 60 mph wind gust occurred in Whalan.

Hail in OLMSTED, MINNESOTA
From 31-MAY-13 20:34:00 to 31-MAY-13 20:34:00 (CST-6)
Location: MARION
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Up to half dollar sized hail fell in Marion.

Lightning in OLMSTED, MINNESOTA
From 31-MAY-13 20:35:00 to 31-MAY-13 20:35:00 (CST-6)
Location: ROCHESTER
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Lightning struck a tree on the southwest side of Rochester causing a nearby natural gas line to start on fire. Firefighters cooled the fire until the utility company clamped off the gas line.

Lightning in OLMSTED, MINNESOTA
From 31-MAY-13 22:05:00 to 31-MAY-13 23:59:00 (CST-6)
Location: CHESTER
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Lightning struck a house on the southeast side of Rochester causing a fire in the attic. The fire was quickly put out but extensive damage was done to the roof and attic.

Hail in WABASHA, MINNESOTA
From 31-MAY-13 14:05:00 to 31-MAY-13 14:05:00 (CST-6)
Location: PLAINVIEW
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in OLMSTED, MINNESOTA
From 31-MAY-13 14:08:00 to 31-MAY-13 14:08:00 (CST-6)
Location: EYOTA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WABASHA, MINNESOTA
From 31-MAY-13 14:13:00 to 31-MAY-13 14:13:00 (CST-6)
Location: CONCEPTION
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Golf ball sized hail fell between Kellogg and Plainview.

Hail in WABASHA, MINNESOTA
From 31-MAY-13 14:22:00 to 31-MAY-13 14:22:00 (CST-6)
Location: WABASHA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in OLMSTED, MINNESOTA
From 31-MAY-13 19:55:00 to 31-MAY-13 19:55:00 (CST-6)
Location: (RST)ROCHESTER MUNI
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Quarter sized hail fell and there was also a 57 mph wind gust south of Rochester.

Hail in OLMSTED, MINNESOTA
From 31-MAY-13 20:11:00 to 31-MAY-13 20:11:00 (CST-6)
Location: STEWARTVILLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media