Extensive low clouds developed across the area on the morning of the 20th. These clouds held across most areas into the afternoon, especially from Grand Forks to Thief River Falls. However, it did clear out sooner for areas south of highway 200. In this area, afternoon temperatures rose into the upper 80s to low 90s along with dew points in the mid 70s. Thunderstorms formed over central North Dakota, between Bismarck and Rugby, and tracked slowly east, producing large hail and strong wind gusts.

Thunderstorm Wind in KITTSON, MINNESOTA
From 20-JUL-16 20:34:00 to 20-JUL-16 20:34:00 (CST-6)
Location: HALLOCK ARPT
Magnitude: 72.00 MG
Reported by: AWOS

The wind gust was measured by the AWOS at the Hallock airport.

Thunderstorm Wind in POLK, MINNESOTA
From 20-JUL-16 21:55:00 to 20-JUL-16 21:55:00 (CST-6)
Location: TABOR
Magnitude: 56.00 MG
Reported by: Mesonet

The wind gust was measured by a personal weather station.

Thunderstorm Wind in NORMAN, MINNESOTA
From 20-JUL-16 23:05:00 to 20-JUL-16 23:05:00 (CST-6)
Location: RANUM
Magnitude: 56.00 EG
Reported by: Trained Spotter

Two box elder trees were blown down, one of the trees was two feet in diameter.

Hail in LAKE OF THE WOODS, MINNESOTA
From 20-JUL-16 23:08:00 to 20-JUL-16 23:08:00 (CST-6)
Location: CARP
Magnitude: 2.00 
Reported by: Social Media

Thunderstorm Wind in MAHNOMEN, MINNESOTA
From 20-JUL-16 23:11:00 to 20-JUL-16 23:11:00 (CST-6)
Location: MAHNOMEN
Magnitude: 62.00 MG
Reported by: Mesonet

The wind gust was measured by a MNDOT RWIS sensor along highway 59.

Thunderstorm Wind in BELTRAMI, MINNESOTA
From 20-JUL-16 23:15:00 to 20-JUL-16 23:15:00 (CST-6)
Location: WASKISH
Magnitude: 56.00 EG
Reported by: COOP Observer

A small maple tree was uprooted and other limbs were blown off trees.

Thunderstorm Wind in BECKER, MINNESOTA
From 20-JUL-16 23:35:00 to 20-JUL-16 23:35:00 (CST-6)
Location: DETROIT LAKES ARPT
Magnitude: 58.00 MG
Reported by: AWOS

The wind gust was measured at the Detroit Lakes airport.

Thunderstorm Wind in BECKER, MINNESOTA
From 20-JUL-16 23:44:00 to 20-JUL-16 23:44:00 (CST-6)
Location: DETROIT LAKES
Magnitude: 52.00 EG
Reported by: Law Enforcement

Large tree branches were blown down around town.

Thunderstorm Wind in CLEARWATER, MINNESOTA
From 20-JUL-16 23:50:00 to 20-JUL-16 23:50:00 (CST-6)
Location: LAKE ITASCA
Magnitude: 56.00 EG
Reported by: Public

Two trees were snapped in half by the strong winds.

Thunderstorm Wind in BELTRAMI, MINNESOTA
From 20-JUL-16 23:58:00 to 20-JUL-16 23:58:00 (CST-6)
Location: WILTON
Magnitude: 56.00 EG
Reported by: Law Enforcement

Mature trees were blown down, causing power outages.

Thunderstorm Wind in HUBBARD, MINNESOTA
From 21-JUL-16 00:00:00 to 21-JUL-16 00:00:00 (CST-6)
Location: PARK RAPIDS
Magnitude: 61.00 EG
Reported by: Trained Spotter

Three large trees were uprooted.

Thunderstorm Wind in HUBBARD, MINNESOTA
From 21-JUL-16 00:02:00 to 21-JUL-16 00:02:00 (CST-6)
Location: NEVIS ARPT
Magnitude: 56.00 EG
Reported by: Trained Spotter

Tree damage was reported around Camp Wilderness, along with power outages.

Thunderstorm Wind in BELTRAMI, MINNESOTA
From 21-JUL-16 00:05:00 to 21-JUL-16 00:05:00 (CST-6)
Location: (BJI)BEMIDJI ARPT
Magnitude: 52.00 MG
Reported by: AWOS

The wind gust was measured by the AWOS at the Bemidji airport.

Thunderstorm Wind in BELTRAMI, MINNESOTA
From 21-JUL-16 00:13:00 to 21-JUL-16 00:13:00 (CST-6)
Location: BEMIDJI
Magnitude: 56.00 EG
Reported by: Emergency Manager

Tree damage was widespread around Bemidji. Roofing was blown off several buildings.

Thunderstorm Wind in OTTER TAIL, MINNESOTA
From 21-JUL-16 00:25:00 to 21-JUL-16 00:25:00 (CST-6)
Location: DUNVILLA
Magnitude: 52.00 MG
Reported by: Mesonet

The wind gust was measured by a personal weather station.