Two rounds of thunderstorms moved across southeast Minnesota during the morning of July 20th. The first round produced at 74 mph wind gust at the Rochester International Airport (Olmsted County). The second round of storms blew down trees from near Austin (Mower County) to the northwest side of Rochester. Around 5,000 customers were without power after the storms passed through Rochester. Another 1,000 customers lost power in Mower County. Several streets were blocked in Rochester by downed trees. A fire started by a lightning strike destroyed a house and garage north of Genoa (Olmsted County).

Thunderstorm Wind in OLMSTED, MINNESOTA
From 20-JUL-19 07:57:00 to 20-JUL-19 07:57:00 (CST-6)
Location: (RST)ROCHESTER MUNI
Magnitude: 64.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The automated weather observing equipment at the Rochester International Airport measured a wind gust of 74 mph.

Flash Flood in DODGE, MINNESOTA
From 20-JUL-19 09:10:00 to 20-JUL-19 14:30:00 (CST-6)
Location: MANTORVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 150.00K
Reported by: Law Enforcement

Rainfall amounts of 2 to 4 inches were common across the eastern portions of Dodge County. Runoff from this rain caused a pond west of Mantorville to overflow its dam.

Thunderstorm Wind in OLMSTED, MINNESOTA
From 20-JUL-19 10:34:00 to 20-JUL-19 10:34:00 (CST-6)
Location: (RST)ROCHESTER MUNI
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The automated weather observing equipment at the Rochester International Airport measured a wind gust of 64 mph.

Thunderstorm Wind in OLMSTED, MINNESOTA
From 20-JUL-19 07:50:00 to 20-JUL-19 07:50:00 (CST-6)
Location: ROCHESTER
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A large tree fell on the deck of a house north of Rochester.

Thunderstorm Wind in OLMSTED, MINNESOTA
From 20-JUL-19 10:42:00 to 20-JUL-19 10:42:00 (CST-6)
Location: ROCHESTER
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A 71 mph wind gust was measured by a personal weather station on the east side of Rochester.

Thunderstorm Wind in WINONA, MINNESOTA
From 20-JUL-19 11:12:00 to 20-JUL-19 11:12:00 (CST-6)
Location: WINONA
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Trees were blown down in Winona.

Thunderstorm Wind in MOWER, MINNESOTA
From 20-JUL-19 10:15:00 to 20-JUL-19 10:15:00 (CST-6)
Location: MAPLEVIEW
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

Trees were blown down on the northwest side of Austin.

Heavy Rain in DODGE, MINNESOTA
From 20-JUL-19 05:20:00 to 20-JUL-19 11:48:00 (CST-6)
Location: MANTORVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

In Mantorville, six inches of rain fell.

Thunderstorm Wind in MOWER, MINNESOTA
From 20-JUL-19 10:16:00 to 20-JUL-19 10:16:00 (CST-6)
Location: WALTHAM
Magnitude: 45.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

Trees were blown down in Waltham.

Flood in WABASHA, MINNESOTA
From 21-JUL-19 05:24:00 to 22-JUL-19 01:00:00 (CST-6)
Location: ZUMBRO FALLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from heavy rain pushed the Zumbro River out of its banks in Zumbro Falls. The river crested almost two feet above the flood stage at 19.71 feet on the 21st.

Thunderstorm Wind in OLMSTED, MINNESOTA
From 20-JUL-19 10:32:00 to 20-JUL-19 10:32:00 (CST-6)
Location: ROCHESTER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An estimated 60 mph wind gust occurred on the northwest side of Rochester.

Hail in OLMSTED, MINNESOTA
From 20-JUL-19 10:33:00 to 20-JUL-19 10:33:00 (CST-6)
Location: ROCHESTER
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in WABASHA, MINNESOTA
From 20-JUL-19 08:05:00 to 20-JUL-19 08:05:00 (CST-6)
Location: PLAINVIEW
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and power lines were blown down in Plainview.

Thunderstorm Wind in DODGE, MINNESOTA
From 20-JUL-19 10:13:00 to 20-JUL-19 10:13:00 (CST-6)
Location: DODGE CENTER
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The automated weather observing equipment at the Dodge Center airport measured a wind gust of 58 mph.

Flash Flood in OLMSTED, MINNESOTA
From 20-JUL-19 11:32:00 to 20-JUL-19 14:30:00 (CST-6)
Location: GENOA
Flood cause: Heavy Rain
Property damage: 15.00K
Crop damage: 70.00K
Reported by: Emergency Manager

Rainfall amounts of 2 to 4 inches were common across the northwest part of Olmsted County. Runoff from this rain caused water to go over several rural roads. Oxbow Park and Zollman Zoo had to be closed because of flood waters from the South Branch of the Middle Fork Zumbro River.

Thunderstorm Wind in MOWER, MINNESOTA
From 20-JUL-19 10:16:00 to 20-JUL-19 10:16:00 (CST-6)
Location: MAPLEVIEW
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Numerous trees were blown down in Austin.

Heavy Rain in OLMSTED, MINNESOTA
From 20-JUL-19 05:30:00 to 20-JUL-19 13:00:00 (CST-6)
Location: DOUGLAS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

On the northwest side of Rochester, a mesonet station measured 2.95 inches of rain.

Lightning in OLMSTED, MINNESOTA
From 20-JUL-19 10:45:00 to 20-JUL-19 10:45:00 (CST-6)
Location: GENOA
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Newspaper

A fire was started by a lightning strike in Genoa. A garage was initially hit with the resulting fire spreading to the house. Both structures were destroyed by the fire. Two off-duty police officers had to rescue a person trapped in burning house.

Thunderstorm Wind in OLMSTED, MINNESOTA
From 20-JUL-19 10:29:00 to 20-JUL-19 10:29:00 (CST-6)
Location: ROCHESTER
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

Trees were blown down north of Rochester.

Thunderstorm Wind in OLMSTED, MINNESOTA
From 20-JUL-19 10:22:00 to 20-JUL-19 10:22:00 (CST-6)
Location: BYRON
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

A tree was uprooted in Byron.