In the early afternoon of Monday May 21st, Severe Thunderstorm Watch 282 was issued in anticipation of severe thunderstorms developing along and ahead of a cold frontal boundary approaching western North Dakota, and along a warm front over north central North Dakota. Numerous severe thunderstorm warnings and several tornado warnings were issued. Over a dozen reports of large hail, several reports of severe thunderstorm wind gusts, and 2 confirmed tornado reports were received during the late afternoon and evening hours.

Hail in BOTTINEAU, NORTH DAKOTA
From 21-MAY-07 17:38:00 to 21-MAY-07 17:44:00 (CST-6)
Location: LANSFORD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in WARD, NORTH DAKOTA
From 21-MAY-07 17:12:00 to 21-MAY-07 17:40:00 (CST-6)
Location: MINOT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail lasted on and off for about 30 minutes.

Hail in WARD, NORTH DAKOTA
From 21-MAY-07 18:50:00 to 21-MAY-07 18:55:00 (CST-6)
Location: MAKOTI
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in MORTON, NORTH DAKOTA
From 21-MAY-07 18:22:00 to 21-MAY-07 18:23:00 (CST-6)
Location: GLEN ULLIN
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

See tornado entry from the same date at 18:15 CST to 18:17 CST near the same location in Morton County. This tornado developed from the same parent thunderstorm as the earlier one. It was on the north side of Interstate 94, hit no structures and did no damage. This report came from a trained spotter. This tornado was very short lived, basically touched the ground and retreated back into the parent thunderstorm.

Hail in MORTON, NORTH DAKOTA
From 21-MAY-07 17:43:00 to 21-MAY-07 17:48:00 (CST-6)
Location: HEBRON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in MERCER, NORTH DAKOTA
From 21-MAY-07 17:17:00 to 21-MAY-07 17:22:00 (CST-6)
Location: BEULAH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in MORTON, NORTH DAKOTA
From 21-MAY-07 17:20:00 to 21-MAY-07 17:32:00 (CST-6)
Location: GLEN ULLIN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in SHERIDAN, NORTH DAKOTA
From 21-MAY-07 17:45:00 to 21-MAY-07 17:48:00 (CST-6)
Location: MCCLUSKY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in SHERIDAN, NORTH DAKOTA
From 21-MAY-07 17:20:00 to 21-MAY-07 17:25:00 (CST-6)
Location: MCCLUSKY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

One 60 year old female was injured by hail while outside. She heard the severe thunderstorm warning and went outside to secure property in anticipation of the storm. Golf ball size hail fell from a mostly sunny sky, hitting her in the head. She required 8 stiches to her forehead. The large hail was falling miles away from the storm core.

Tornado in MORTON, NORTH DAKOTA
From 21-MAY-07 18:15:00 to 21-MAY-07 18:17:00 (CST-6)
Location: GLEN ULLIN
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

The tornado was on the north side of Interstate 94. It hit no structures and did no damage. The report came from professional storm chasers. The tornado retreated completely back up into the parent thunderstorm. See tornado entry from the same date at 18:22 CST to 18:23 CST near the same location in Morton County.

Hail in ROLETTE, NORTH DAKOTA
From 21-MAY-07 19:35:00 to 21-MAY-07 19:40:00 (CST-6)
Location: ROLETTE
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in MCLEAN, NORTH DAKOTA
From 21-MAY-07 19:30:00 to 21-MAY-07 19:35:00 (CST-6)
Location: WASHBURN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in PIERCE, NORTH DAKOTA
From 21-MAY-07 19:22:00 to 21-MAY-07 19:27:00 (CST-6)
Location: RUGBY
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Storm total rain was 1.57 inches.

Hail in WARD, NORTH DAKOTA
From 21-MAY-07 16:53:00 to 21-MAY-07 16:58:00 (CST-6)
Location: MAKOTI
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in WARD, NORTH DAKOTA
From 21-MAY-07 16:11:00 to 21-MAY-07 16:21:00 (CST-6)
Location: MAKOTI
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Rainfall total was 1.27 inches in 20 minutes.

Hail in BOTTINEAU, NORTH DAKOTA
From 21-MAY-07 18:38:00 to 21-MAY-07 18:43:00 (CST-6)
Location: LANSFORD
Magnitude: 1.00 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: COOP Observer

There was damage to siding on a few houses.

Hail in OLIVER, NORTH DAKOTA
From 21-MAY-07 18:45:00 to 21-MAY-07 18:52:00 (CST-6)
Location: CENTER
Magnitude: 1.00 
Property damage: 0.10K
Crop damage: 0.00K
Reported by: Public

One window was broken due to the hail.

Thunderstorm Wind in OLIVER, NORTH DAKOTA
From 21-MAY-07 18:57:00 to 21-MAY-07 19:03:00 (CST-6)
Location: CENTER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rainfall was 0.57 inches in a very short period of time which caused very minor street flooding. The storm was accompanied by pea size hail.