Several rounds of thunderstorms rolled across southeast Minnesota during the afternoon and evening of May 19th. The first round of storms produced wind damage from the northeast corner of Mower County into Winona and Wabasha Counties during the afternoon. The second round of storms produced additional wind damage across primarily Winona County later that evening. In addition, the heavy rain from these repeated storms caused flash flooding to occur near Le Roy and Adams (Mower County) as water from streams flowed over several roads that prompted sandbagging.  Other flash flooding near Rose Creek (Mower County) caused significant flooding at a campground.

Thunderstorm Wind in FILLMORE, MINNESOTA
From 19-MAY-13 15:23:00 to 19-MAY-13 15:23:00 (CST-6)
Location: SPRING VLY
Magnitude: 50.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Broadcast Media

On a farm near Spring Valley, 38 trees were either uprooted or snapped off.

Thunderstorm Wind in WINONA, MINNESOTA
From 19-MAY-13 18:35:00 to 19-MAY-13 18:35:00 (CST-6)
Location: ROLLINGSTONE
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees were blown down in Rollingstone, temporarily blocking traffic on South Main Street.

Thunderstorm Wind in OLMSTED, MINNESOTA
From 19-MAY-13 15:19:00 to 19-MAY-13 15:19:00 (CST-6)
Location: (RST)ROCHESTER MUNI
Magnitude: 52.00 MG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: ASOS

The automated weather observing equipment at the Rochester International Airport measured a wind gust of 60 mph. There were also reports from the northwest side of Rochester of power outages and debris blown onto area streets. Some trees were blown down with at least one landing on a car breaking the back window. Around 5,000 customers in Rochester lost power because of the storm.

Flood in FILLMORE, MINNESOTA
From 20-MAY-13 12:40:00 to 20-MAY-13 17:00:00 (CST-6)
Location: PRESTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from heavy rains pushed the South Branch of the Root River out of its banks in Preston. The river crested just over a foot above the flood stage at 938.07 feet.

Thunderstorm Wind in WINONA, MINNESOTA
From 19-MAY-13 18:40:00 to 19-MAY-13 18:40:00 (CST-6)
Location: WINONA
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A 62 mph wind gust occurred in Winona.

Heavy Rain in FILLMORE, MINNESOTA
From 19-MAY-13 15:45:00 to 19-MAY-13 21:00:00 (CST-6)
Location: FILLMORE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The automated mesonet reporting equipment in the town of Fillmore reported 2.39 inches of rain.

Heavy Rain in MOWER, MINNESOTA
From 19-MAY-13 15:00:00 to 19-MAY-13 23:13:00 (CST-6)
Location: GRAND MEADOW
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The COOP observer in Grand Meadow reported 2.21 inches of rain.

Heavy Rain in OLMSTED, MINNESOTA
From 19-MAY-13 16:00:00 to 20-MAY-13 01:02:00 (CST-6)
Location: DOVER
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The automated mesonet reporting equipment in Dover reported 2.52 inches of rain.

Thunderstorm Wind in WINONA, MINNESOTA
From 19-MAY-13 16:23:00 to 19-MAY-13 16:23:00 (CST-6)
Location: ST CHARLES
Magnitude: 55.00 EG
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Damage to buildings occurred from about 2 miles north of St. Charles to 4 miles north of St. Charles. Large trees were blown down along with a pole barn and corn cribs. Six foot long sections of tin were ripped off other buildings and some one inch hail also fell.

Flash Flood in MOWER, MINNESOTA
From 19-MAY-13 21:00:00 to 20-MAY-13 01:30:00 (CST-6)
Location: ELKTON
Flood cause: Heavy Rain
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Flood waters from Rose Creek inundated Jellystone Campground east of Austin. A pedestrian bridge was severely damaged. The majority of the campers and RVs in the park were moved to safety, but a few vehicles did suffer some water damage. Highway shoulders in the area were washed out and some secondary roads were closed by the high water.

Flash Flood in FILLMORE, MINNESOTA
From 19-MAY-13 20:00:00 to 20-MAY-13 00:10:00 (CST-6)
Location: OSTRANDER
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rains across the western sections of Fillmore County caused numerous roads to be closed and basement flooding to occur in Spring Valley. The high water stranded several heads of cattle in the Wykoff and Fillmore areas.

Flash Flood in MOWER, MINNESOTA
From 19-MAY-13 19:49:00 to 20-MAY-13 00:40:00 (CST-6)
Location: ADAMS
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Sandbagging occurred in Adams and County Roads 4 and 7 near Adams were closed as water from several branches of the Little Cedar River were out of their banks. Flood waters covered much of the business district in Adams with little damage occurring to those that were able to sand bag. For those that didn't, water reached into the buildings creating minor damage.

Flood in HOUSTON, MINNESOTA
From 21-MAY-13 07:05:00 to 22-MAY-13 02:35:00 (CST-6)
Location: HOUSTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from heavy rains pushed the Root River out of its banks near Houston. The river crested a foot and a half above the flood stage at 16.52 feet.

Flood in MOWER, MINNESOTA
From 20-MAY-13 02:25:00 to 20-MAY-13 11:30:00 (CST-6)
Location: AUSTIN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from heavy rains pushed Dobbins Creek out of its banks in Austin. The creek crested a foot and a half above the flood stage at 13.01 feet.

Thunderstorm Wind in WINONA, MINNESOTA
From 19-MAY-13 18:21:00 to 19-MAY-13 18:21:00 (CST-6)
Location: LEWISTON
Magnitude: 55.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down and one inch hail fell in Lewiston. One of the large trees blown down fell across U.S. Highway 14 with both lanes blocked for about 15 minutes.

Thunderstorm Wind in WINONA, MINNESOTA
From 19-MAY-13 18:13:00 to 19-MAY-13 18:13:00 (CST-6)
Location: FREMONT
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Wind gusts from a line of thunderstorms caused a semi truck to jack knife on Interstate 90 southwest of Lewiston.

Thunderstorm Wind in WINONA, MINNESOTA
From 19-MAY-13 18:21:00 to 19-MAY-13 18:21:00 (CST-6)
Location: LEWISTON
Magnitude: 64.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts of 65 to 74 mph occurred south of Lewiston.

Thunderstorm Wind in WINONA, MINNESOTA
From 19-MAY-13 18:40:00 to 19-MAY-13 18:40:00 (CST-6)
Location: ROLLINGSTONE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Vehicles and a deck were damaged when large tree branches landed on them.

Flash Flood in MOWER, MINNESOTA
From 19-MAY-13 17:52:00 to 19-MAY-13 22:00:00 (CST-6)
Location: LE ROY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water from a branch of the Upper Iowa River was flowing over State Highway 56 west of Le Roy.

Thunderstorm Wind in MOWER, MINNESOTA
From 19-MAY-13 15:10:00 to 19-MAY-13 15:10:00 (CST-6)
Location: RACINE
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Around 30 large pine trees were blown down south of Stewartville.

Thunderstorm Wind in WINONA, MINNESOTA
From 19-MAY-13 16:22:00 to 19-MAY-13 16:22:00 (CST-6)
Location: ST CHARLES
Magnitude: 55.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Power lines and trees were blown in St. Charles. The strong winds also damaged a building of a local agricultural business.

Flood in WINONA, MINNESOTA
From 19-MAY-13 22:20:00 to 20-MAY-13 04:45:00 (CST-6)
Location: ST CHARLES
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from heavy rains pushed the Whitewater River out of its banks in the Whitewater State Park. The river crested less than a half foot over the flood stage at 13.9 feet.