A disturbance ejecting northeast across the area produced severe thunderstorms beginning across near Fort Peck lake that tracked east across McCone county and stretched north-south as it approached the North Dakota border. A weak tornado possibly touched down.

Thunderstorm Wind in PRAIRIE, MONTANA
From 21-JUN-10 19:55:00 to 21-JUN-10 19:55:00 (MST-7)
Location: TERRY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter reported large trees bending in the strong winds.

Tornado in VALLEY, MONTANA
From 21-JUN-10 15:00:00 to 21-JUN-10 15:00:00 (MST-7)
Location: KING COULEE RAWS
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Coop Observer reported a brief touchdown in very rural area of SW Valley County.

Hail in GARFIELD, MONTANA
From 21-JUN-10 15:00:00 to 21-JUN-10 15:00:00 (MST-7)
Location: JORDAN AIRPORT (KJDN)
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Golfball size hail was falling at the Hell Creek Recreation Area.

Funnel Cloud in GARFIELD, MONTANA
From 21-JUN-10 15:00:00 to 21-JUN-10 15:00:00 (MST-7)
Location: HAXBY HOOLIE AIRPORT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter witnessed two funnel clouds a half mile apart.

Hail in PHILLIPS, MONTANA
From 21-JUN-10 15:20:00 to 21-JUN-10 15:24:00 (MST-7)
Location: SACO
Magnitude: 1.00 
Property damage: 0.00K
Reported by: Trained Spotter

Nickel to quarter size hail fell in the area resulting in the destruction of some alfalfa crop.

Heavy Rain in DAWSON, MONTANA
From 21-JUN-10 19:00:00 to 21-JUN-10 19:19:00 (MST-7)
Location: BLOOMFIELD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter observed water running off of the yard with large puddles visible in the wheat field.

Hail in RICHLAND, MONTANA
From 21-JUN-10 19:45:00 to 21-JUN-10 19:45:00 (MST-7)
Location: FAIRVIEW
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter reported one inch hail.

Hail in MCCONE, MONTANA
From 21-JUN-10 16:15:00 to 21-JUN-10 16:15:00 (MST-7)
Location: FT PECK LAKE HANDAR
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

At 1615 MST 18 miles southeast of Fort Peck, law enforcement officer reported 2.75 inch hail while one inch hail covered the ground on Highway 24. Up to one inch hail was reported by an NWS employee 10 miles southeast of Fort Peck Handar.

Hail in MCCONE, MONTANA
From 21-JUN-10 17:05:00 to 21-JUN-10 17:05:00 (MST-7)
Location: VIDA
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Five miles southwest of Vida, the crops were laying flat with almost 100% loss.

Hail in MCCONE, MONTANA
From 21-JUN-10 16:45:00 to 21-JUN-10 17:05:00 (MST-7)
Location: VIDA
Magnitude: 1.75 
Property damage: 0.10K
Crop damage: 0.00K
Reported by: Trained Spotter

Clouds were rotating with 50 mph winds accompanying the hail. A window was broken from the storm.

Hail in RICHLAND, MONTANA
From 21-JUN-10 18:00:00 to 21-JUN-10 18:00:00 (MST-7)
Location: ENID
Magnitude: 1.75 
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

Storm brought 1.75 hail and strong winds caught damage to rain gutters, air conditioner units and window seals.

Thunderstorm Wind in WIBAUX, MONTANA
From 21-JUN-10 21:00:00 to 21-JUN-10 21:00:00 (MST-7)
Location: WIBAUX
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Strong winds blew flagpole and lawn furniture away.

Hail in MCCONE, MONTANA
From 21-JUN-10 16:30:00 to 21-JUN-10 16:30:00 (MST-7)
Location: FT PECK LAKE HANDAR
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Reported on Highway 24.

Hail in MCCONE, MONTANA
From 21-JUN-10 17:05:00 to 21-JUN-10 17:05:00 (MST-7)
Location: VIDA
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Small tree branches were observed falling out of the tree. Rotation in the clouds were also reported.

Hail in RICHLAND, MONTANA
From 21-JUN-10 18:00:00 to 21-JUN-10 18:00:00 (MST-7)
Location: ENID
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Funnel Cloud in RICHLAND, MONTANA
From 21-JUN-10 18:25:00 to 21-JUN-10 18:25:00 (MST-7)
Location: ENID
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in RICHLAND, MONTANA
From 21-JUN-10 18:00:00 to 21-JUN-10 18:00:00 (MST-7)
Location: ENID
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Large hail also occurred with this wind, causing damage to rain gutters, air conditioning units and window seals.

Hail in RICHLAND, MONTANA
From 21-JUN-10 19:02:00 to 21-JUN-10 19:02:00 (MST-7)
Location: SIOUX PASS DOT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rain mixed with the hail. Also a rapid drop in temperature occurred with 40 to 50 mph winds.