An unstable atmosphere combined with strong southwest winds aloft and sufficient shear to support and sustain organized severe thunderstorms across most of eastern Montana through the late evening and night-time hours on the 4th.

Hail in GARFIELD, MONTANA
From 04-JUL-20 19:15:00 to 04-JUL-20 19:15:00 (MST-7)
Location: HAXBY POINT
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported, via Facebook, ping pong ball size hail near Rock Creek State Park & Marina.

Hail in DANIELS, MONTANA
From 04-JUL-20 19:10:00 to 04-JUL-20 19:30:00 (MST-7)
Location: SCOBEY
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported plentiful hail up to the size of ping pong balls, lasting for approximately 15 to 20 minutes.

Hail in VALLEY, MONTANA
From 04-JUL-20 19:35:00 to 04-JUL-20 19:35:00 (MST-7)
Location: NASHUA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported plentiful hail up to the size of golf balls, near covering the ground.

Thunderstorm Wind in VALLEY, MONTANA
From 04-JUL-20 20:10:00 to 04-JUL-20 20:10:00 (MST-7)
Location: DUCK CREEK
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported roof/shingle damage in the duck creek area.  Time estimated by radar.

Thunderstorm Wind in VALLEY, MONTANA
From 04-JUL-20 20:10:00 to 04-JUL-20 20:10:00 (MST-7)
Location: FT PECK
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Multiple off duty NWS employees reported tree branches of at least 4 inches in diameter snapped off.  Wind speed estimated at 70-80 mph.

Thunderstorm Wind in VALLEY, MONTANA
From 04-JUL-20 20:24:00 to 04-JUL-20 20:24:00 (MST-7)
Location: DUCK CREEK
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported, via Facebook, wind damage to the B string and the C dock at the Fort Peck Lake Marina.  Time estimated from radar.

Thunderstorm Wind in ROOSEVELT, MONTANA
From 04-JUL-20 21:58:00 to 04-JUL-20 21:58:00 (MST-7)
Location: CULBERTSON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported a couple of trees were snapped.  Winds speed is estimated.

Thunderstorm Wind in VALLEY, MONTANA
From 04-JUL-20 19:20:00 to 04-JUL-20 19:20:00 (MST-7)
Location: KING COULEE RAWS
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

At the King Coulee RAWS site (KIGM8), a 64 mph wind gust was recorded. Time estimated by radar.

Thunderstorm Wind in VALLEY, MONTANA
From 04-JUL-20 20:02:00 to 04-JUL-20 20:02:00 (MST-7)
Location: DUCK CREEK
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

At the mesonet site near the Duck Creek Recreation area, a 72 mph wind gust was reported.  Time estimated from radar.

Thunderstorm Wind in VALLEY, MONTANA
From 04-JUL-20 20:05:00 to 04-JUL-20 20:05:00 (MST-7)
Location: FT PECK
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Off duty NWS employee, 1 SSW Fort Peck, estimated 60 mph wind gusts, which was corroborated by other similar reports from social media.

Thunderstorm Wind in RICHLAND, MONTANA
From 04-JUL-20 21:30:00 to 04-JUL-20 21:30:00 (MST-7)
Location: ENID
Magnitude: 70.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter, 12 NNW Enid, reported 81 mph wind gusts.  A large cottonwood tree was uprooted, and five grain bins were destroyed.

Thunderstorm Wind in RICHLAND, MONTANA
From 04-JUL-20 21:30:00 to 04-JUL-20 21:30:00 (MST-7)
Location: ENID
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

At the Badger Creek Handar site (F2498), wind gusts of 68 mph were recorded, as well as sustained winds up to 55 mph.

Thunderstorm Wind in SHERIDAN, MONTANA
From 04-JUL-20 21:48:00 to 04-JUL-20 21:48:00 (MST-7)
Location: DAGMAR
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

At the mesonet site, 7 SW Dagmar, a 62 mph wind gusts was recorded.

Hail in VALLEY, MONTANA
From 04-JUL-20 19:30:00 to 04-JUL-20 19:30:00 (MST-7)
Location: NASHUA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported hail up to the size of quarters.