In the early afternoon of June 18th, Severe Thunderstorm Watch 465 was issued due to thunderstorms developing, and expected to be severe, in the vicinity of an approaching upper level low pressure system. Multiple severe thunderstorm warnings were issued. Several reports of large hail and severe thunderstorm wind gusts were received during the afternoon hours. In addition, flash flooding from very heavy rainfall was reported over far north central North Dakota, where slow moving thunderstorms produced rainfall amounts of up to four inches in one hour.

Thunderstorm Wind in DICKEY, NORTH DAKOTA
From 18-JUN-09 15:00:00 to 18-JUN-09 15:05:00 (CST-6)
Location: MERRICOURT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The wind speed was estimated.

Thunderstorm Wind in LA MOURE, NORTH DAKOTA
From 18-JUN-09 15:20:00 to 18-JUN-09 15:25:00 (CST-6)
Location: EDGELEY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The severe thunderstorm wind gust was accompanied by penny size hail.

Funnel Cloud in DICKEY, NORTH DAKOTA
From 18-JUN-09 15:40:00 to 18-JUN-09 15:43:00 (CST-6)
Location: OAKES MUNI ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in BOTTINEAU, NORTH DAKOTA
From 18-JUN-09 15:45:00 to 18-JUN-09 15:50:00 (CST-6)
Location: ROTH
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in BOTTINEAU, NORTH DAKOTA
From 18-JUN-09 16:20:00 to 18-JUN-09 16:25:00 (CST-6)
Location: ROTH
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MOUNTRAIL, NORTH DAKOTA
From 18-JUN-09 12:50:00 to 18-JUN-09 13:00:00 (CST-6)
Location: BLAISDELL
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in LA MOURE, NORTH DAKOTA
From 18-JUN-09 15:25:00 to 18-JUN-09 15:35:00 (CST-6)
Location: LA MOURE
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Newspaper

Severe thunderstorm wind gusts blew down several large trees in the city of LaMoure, knocking out power to several homes.

Flash Flood in ROLETTE, NORTH DAKOTA
From 18-JUN-09 19:00:00 to 18-JUN-09 22:00:00 (CST-6)
Location: DUNSEITH
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Rainfall amounts ranging from three to four inches in one hour resulted in flash flooding over western Rolette County. Water was reported over Highway Five west of Dunseith, and was closed for several hours. The flash flooding occurred in a rural area and there were no reports of flooded structures.

Flash Flood in BOTTINEAU, NORTH DAKOTA
From 18-JUN-09 19:00:00 to 18-JUN-09 22:00:00 (CST-6)
Location: BOTTINEAU ARPT
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Rainfall amounts ranging from three to four inches in one hour resulted in flash flooding over far eastern Bottineau County. Water was reported over Highway Five west of Dunseith, and was closed for several hours. A few county roads were closed due to high water and minor repairs were needed.