After the first round of elevated convection from the early morning hours of the 24th drifted off to the northeast, a surface warm front was left along the North Dakota and South Dakota border by mid morning. By mid afternoon of the 24th, the warm front had pushed north to a Jamestown (ND) to Bemidji (MN) line. Behind this front, afternoon temperatures had increased to around 90 degrees with dew points in the mid to upper 60s. High precipitable water values remained over eastern North Dakota and the northwest quarter of Minnesota, keeping the heavy rain threat in place throughout the day.

Flash Flood in NELSON, NORTH DAKOTA
From 24-MAY-10 16:00:00 to 24-MAY-10 19:00:00 (CST-6)
Location: MICHIGAN CITY
Flood cause: Heavy Rain
Property damage: 15.00K
Crop damage: 30.00K
Reported by: Emergency Manager

Heavy afternoon rains combined with earlier runoff to cause localized flooding near the community.

Hail in WALSH, NORTH DAKOTA
From 24-MAY-10 19:35:00 to 24-MAY-10 19:35:00 (CST-6)
Location: GRAFTON
Magnitude: 0.88 
Reported by: Law Enforcement

Tornado in BARNES, NORTH DAKOTA
From 24-MAY-10 14:29:00 to 24-MAY-10 14:29:00 (CST-6)
Location: VALLEY CITY
Tornado F-scale: EF0
Reported by: Newspaper

A persistent funnel tracked just to the east of Valley City. A brief touchdown and debris cloud were viewed by employees at a city business while the funnel was still south of Interstate 94. No damage was reported as the touchdown occurred over an open field. Peak winds were estimated at 75 mph.

Funnel Cloud in BARNES, NORTH DAKOTA
From 24-MAY-10 14:43:00 to 24-MAY-10 14:43:00 (CST-6)
Location: NORTH VLY CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A funnel extended nearly to the ground just north of exit 294 on Interstate 94, northeast of Valley City.

Thunderstorm Wind in CASS, NORTH DAKOTA
From 24-MAY-10 19:00:00 to 24-MAY-10 19:00:00 (CST-6)
Location: CASSELTON
Magnitude: 60.00 EG
Reported by: Law Enforcement

A semi was blown over on Interstate 94 near the Casselton exit.

Thunderstorm Wind in CAVALIER, NORTH DAKOTA
From 24-MAY-10 21:40:00 to 24-MAY-10 21:40:00 (CST-6)
Location: LANGDON
Magnitude: 55.00 EG
Reported by: COOP Observer

A large tree was blown down in a farmyard.

Funnel Cloud in CASS, NORTH DAKOTA
From 24-MAY-10 14:55:00 to 24-MAY-10 14:55:00 (CST-6)
Location: TOWER CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A rotating wall cloud was viewed by a meteorologist located near Tower City.

Hail in SARGENT, NORTH DAKOTA
From 24-MAY-10 15:11:00 to 24-MAY-10 15:11:00 (CST-6)
Location: RUTLAND
Magnitude: 0.75 
Reported by: Trained Spotter

Pea to penny sized hail fell.

Flash Flood in BARNES, NORTH DAKOTA
From 24-MAY-10 17:45:00 to 24-MAY-10 19:45:00 (CST-6)
Location: PILLSBURY
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 20.00K
Reported by: Law Enforcement

A quarter mile stretch of highway 32 was closed due to water over the road. Water was also reported to be running over Interstate 94 near the Cass County line.

Hail in TRAILL, NORTH DAKOTA
From 24-MAY-10 17:45:00 to 24-MAY-10 17:45:00 (CST-6)
Location: CUMMINGS
Magnitude: 1.00 
Reported by: NWS Employee

Flood in BARNES, NORTH DAKOTA
From 25-MAY-10 20:00:00 to 28-MAY-10 13:00:00 (CST-6)
Location: PILLSBURY
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 25.00K
Reported by: Law Enforcement

Water continued to flow over North Dakota highway 32 in multiple locations where local creeks contribute to the Maple River.

Thunderstorm Wind in STEELE, NORTH DAKOTA
From 24-MAY-10 18:30:00 to 24-MAY-10 18:30:00 (CST-6)
Location: COLGATE
Magnitude: 55.00 EG
Reported by: Trained Spotter

Small trees and numerous large branches were blown down. Approximately 3.69 inches of rain was also reported.

Thunderstorm Wind in STEELE, NORTH DAKOTA
From 24-MAY-10 18:50:00 to 24-MAY-10 18:50:00 (CST-6)
Location: SHERBROOKE
Magnitude: 50.00 EG
Reported by: Trained Spotter

Eight inch diameter tree branches were blown down.

Thunderstorm Wind in TRAILL, NORTH DAKOTA
From 24-MAY-10 17:00:00 to 24-MAY-10 17:00:00 (CST-6)
Location: PORTLAND
Magnitude: 65.00 EG
Reported by: Newspaper

An empty steel grain bin was ripped from its pad and thrown across a farm yard. Several large tree limbs were snapped.

Thunderstorm Wind in RAMSEY, NORTH DAKOTA
From 24-MAY-10 21:20:00 to 24-MAY-10 21:20:00 (CST-6)
Location: (DVL)DEVILS LAKE MUN
Magnitude: 52.00 EG
Reported by: Newspaper

Several large tree limbs were broken down in the Lakewood area. Waves on Devils Lake reached nearly six feet in height and swamped several lakeshore residences.

Flood in CASS, NORTH DAKOTA
From 25-MAY-10 20:00:00 to 28-MAY-10 13:00:00 (CST-6)
Location: PAGE
Flood cause: Heavy Rain
Property damage: 2.00K
Crop damage: 50.00K
Reported by: Law Enforcement

Heavy rains in the headwaters of the Maple River produced flooding and roadbed washouts near county road 1. Area corn crops were swept away by fast moving waters.

Flood in STEELE, NORTH DAKOTA
From 25-MAY-10 20:00:00 to 28-MAY-10 13:00:00 (CST-6)
Location: HOPE
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 50.00K
Reported by: Law Enforcement

Overland flow covered portions of North Dakota highway 32 near the Barnes County line. The golf course near Hope was also damaged by high water.

Thunderstorm Wind in WALSH, NORTH DAKOTA
From 24-MAY-10 13:35:00 to 24-MAY-10 13:35:00 (CST-6)
Location: GRAFTON
Magnitude: 60.00 EG
Reported by: Law Enforcement

A small metal shed was blown up onto the fencing near the cemetery.

Tornado in WALSH, NORTH DAKOTA
From 24-MAY-10 13:30:00 to 24-MAY-10 13:35:00 (CST-6)
Location: KELLOGG
Tornado F-scale: EF1
Reported by: Law Enforcement

A metal street light pole was snapped off and several trees were blown down near the courthouse area. The tornado was viewed approaching town by airport employees located two miles east-southeast of Grafton. Peak winds were estimated at 95 mph.

Flash Flood in WALSH, NORTH DAKOTA
From 24-MAY-10 14:35:00 to 24-MAY-10 16:35:00 (CST-6)
Location: PARK RIVER
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 5.00K
Reported by: Emergency Manager

Ditches were flooded along a county road and briefly covered the road.

Hail in CASS, NORTH DAKOTA
From 24-MAY-10 16:30:00 to 24-MAY-10 16:30:00 (CST-6)
Location: MAGNOLIA
Magnitude: 1.00 
Reported by: Broadcast Media

Small marble to quarter sized hail fell near Wheatland.

Hail in CASS, NORTH DAKOTA
From 24-MAY-10 16:38:00 to 24-MAY-10 16:38:00 (CST-6)
Location: HUNTER
Magnitude: 1.00 
Reported by: Public

Hail in CASS, NORTH DAKOTA
From 24-MAY-10 17:10:00 to 24-MAY-10 17:10:00 (CST-6)
Location: HUNTER
Magnitude: 0.75 
Reported by: Public

Thunderstorm Wind in GRAND FORKS, NORTH DAKOTA
From 24-MAY-10 16:10:00 to 24-MAY-10 16:10:00 (CST-6)
Location: MERRIFIELD
Magnitude: 55.00 EG
Reported by: Trained Spotter

Several large trees were blown down on the south end of town.

Thunderstorm Wind in BENSON, NORTH DAKOTA
From 24-MAY-10 21:15:00 to 24-MAY-10 21:15:00 (CST-6)
Location: MADDOCK MUNI ARPT
Magnitude: 55.00 EG
Reported by: Public

Two large trees were uprooted and a shed was blown down.