As the low level jet increased late in the evening of the 23rd and the early morning of the 24th, it transported very warm, moist, and unstable air into southeast North Dakota and west central Minnesota. Precipitable water values also increased to around 1.75 inches, which brought a heavy rain threat as well. Thunderstorms initially fired in northeast South Dakota and then moved into southeast North Dakota and west central Minnesota in the early morning hours of the 24th.

Hail in HUBBARD, MINNESOTA
From 24-MAY-10 06:00:00 to 24-MAY-10 06:05:00 (CST-6)
Location: BECIDA
Magnitude: 1.00 
Reported by: Trained Spotter

Hail from dime size to quarter size fell for about five minutes.

Hail in BELTRAMI, MINNESOTA
From 24-MAY-10 06:15:00 to 24-MAY-10 06:15:00 (CST-6)
Location: BEMIDJI
Magnitude: 1.25 
Reported by: Trained Spotter

This was the second of three brief hail events through the morning.

Hail in BECKER, MINNESOTA
From 24-MAY-10 06:43:00 to 24-MAY-10 06:43:00 (CST-6)
Location: CALLAWAY
Magnitude: 2.50 
Reported by: Public

Some tennis ball sized hail fell, but it was mostly quarter sized.

Hail in BECKER, MINNESOTA
From 24-MAY-10 06:44:00 to 24-MAY-10 06:44:00 (CST-6)
Location: AUDUBON
Magnitude: 1.00 
Reported by: Public

Hail in MAHNOMEN, MINNESOTA
From 24-MAY-10 06:56:00 to 24-MAY-10 06:56:00 (CST-6)
Location: BEAULIEU
Magnitude: 1.00 
Reported by: Public

Hail in BELTRAMI, MINNESOTA
From 24-MAY-10 02:00:00 to 24-MAY-10 02:00:00 (CST-6)
Location: BEMIDJI
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in OTTER TAIL, MINNESOTA
From 24-MAY-10 02:05:00 to 24-MAY-10 02:05:00 (CST-6)
Location: SPIRIT LAKE
Magnitude: 1.50 
Reported by: Public

Hail in MAHNOMEN, MINNESOTA
From 24-MAY-10 03:05:00 to 24-MAY-10 03:05:00 (CST-6)
Location: BEJOU
Magnitude: 1.75 
Reported by: Broadcast Media

Hail in POLK, MINNESOTA
From 24-MAY-10 03:12:00 to 24-MAY-10 03:12:00 (CST-6)
Location: WINGER
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in BELTRAMI, MINNESOTA
From 24-MAY-10 07:30:00 to 24-MAY-10 07:30:00 (CST-6)
Location: BEMIDJI
Magnitude: 0.88 
Reported by: Trained Spotter

This was the third of three brief hail events of the morning.

Hail in WILKIN, MINNESOTA
From 24-MAY-10 03:40:00 to 24-MAY-10 03:40:00 (CST-6)
Location: LAWNDALE
Magnitude: 1.00 
Reported by: Public

Flash Flood in MAHNOMEN, MINNESOTA
From 24-MAY-10 09:00:00 to 24-MAY-10 12:00:00 (CST-6)
Location: WAUBUN
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 10.00K
Reported by: Law Enforcement

Several sections of township roads were washed out due to heavy rains and rapid runoff along the Mahnomen and Becker county line.

Flash Flood in BECKER, MINNESOTA
From 24-MAY-10 09:15:00 to 24-MAY-10 12:15:00 (CST-6)
Location: WHITE EARTH
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 10.00K
Reported by: Law Enforcement

Water flowed over Becker County 109 south of White Earth. Several other secondary roads near the Becker and Mahnomen county line were flooded or washed out due to the excessive rain.

Hail in BELTRAMI, MINNESOTA
From 24-MAY-10 07:51:00 to 24-MAY-10 07:51:00 (CST-6)
Location: BEMIDJI
Magnitude: 0.88 
Reported by: Amateur Radio

Nickel and dime sized hail was reported.

Hail in BELTRAMI, MINNESOTA
From 24-MAY-10 05:45:00 to 24-MAY-10 05:45:00 (CST-6)
Location: BEMIDJI
Magnitude: 0.75 
Reported by: Trained Spotter