A large low pressure system from the west, with many smaller-scale disturbances combined with a very unstable atmosphere, to allow several strong to severe thunderstorms to develop and move eastward through northeast Montana.

Thunderstorm Wind in PRAIRIE, MONTANA
From 07-JUL-19 19:11:00 to 07-JUL-19 19:11:00 (MST-7)
Location: MC CLOUD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public estimated 60 mph wind gusts.

Hail in PRAIRIE, MONTANA
From 07-JUL-19 19:11:00 to 07-JUL-19 19:11:00 (MST-7)
Location: MC CLOUD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public estimated hail up to the size of quarters.

Thunderstorm Wind in PRAIRIE, MONTANA
From 07-JUL-19 18:55:00 to 07-JUL-19 18:55:00 (MST-7)
Location: MC CLOUD
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported a 59 mph wind gust from their home weather station, along with heavy rain.

Hail in PRAIRIE, MONTANA
From 07-JUL-19 19:26:00 to 07-JUL-19 19:26:00 (MST-7)
Location: MC CLOUD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported hail up to the size of quarters, along with a 44 mph wind gust measured on their Davis weather station.

Heavy Rain in PRAIRIE, MONTANA
From 07-JUL-19 19:42:00 to 07-JUL-19 19:42:00 (MST-7)
Location: MC CLOUD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported at least 4.4 inches of rain in approximately 45 minutes.

Hail in ROOSEVELT, MONTANA
From 07-JUL-19 21:03:00 to 07-JUL-19 21:03:00 (MST-7)
Location: VOLT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported quarter size hail.

Hail in ROOSEVELT, MONTANA
From 07-JUL-19 21:30:00 to 07-JUL-19 21:30:00 (MST-7)
Location: VOLT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported quarter size hail.  Time estimated.

Hail in MCCONE, MONTANA
From 07-JUL-19 18:20:00 to 07-JUL-19 18:20:00 (MST-7)
Location: BROCKWAY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported, via social media, quarter size hail.

Hail in VALLEY, MONTANA
From 07-JUL-19 21:10:00 to 07-JUL-19 21:10:00 (MST-7)
Location: LUSTRE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported, via social media, half dollar size hail.

Hail in ROOSEVELT, MONTANA
From 07-JUL-19 20:10:00 to 07-JUL-19 20:10:00 (MST-7)
Location: WOLF PT INTL AIRPORT(KOLF)
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported golf ball size hail.

Heavy Rain in PRAIRIE, MONTANA
From 07-JUL-19 19:31:00 to 07-JUL-19 19:31:00 (MST-7)
Location: MC CLOUD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported at least 3.25 inches of rain.

Thunderstorm Wind in PRAIRIE, MONTANA
From 07-JUL-19 19:10:00 to 07-JUL-19 19:10:00 (MST-7)
Location: MC CLOUD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public estimated wind gusts of 60 mph that broke tree branches and tossed wind breaks.

Flash Flood in MCCONE, MONTANA
From 07-JUL-19 20:30:00 to 07-JUL-19 20:30:00 (MST-7)
Location: BROCKWAY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

McCone County Sheriff's Office reported a large washout on Ash Creek Road.

Flash Flood in MCCONE, MONTANA
From 07-JUL-19 21:00:00 to 07-JUL-19 21:00:00 (MST-7)
Location: BROCKWAY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

McCone County Sheriff's Office reported several county roads washed out and closed.