Warm and moist surface conditions with temperature/dewpoints in the 80s/50s F respectively contributed to between 500 and 1000 J/kg of MLCAPE across much of south-central and southeast Montana. In addition, increased forcing for ascent from an upper level disturbance approaching from Idaho, along with effective shear of 40-50kts, resulted in the development of severe thunderstorms. This, combined with steep, low and
mid-level lapse rates, helped produce damaging wind gusts and severe hail.

Thunderstorm Wind in YELLOWSTONE, MONTANA
From 07-JUL-21 18:40:00 to 07-JUL-21 18:40:00 (MST-7)
Location: BILLINGS
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A 6 inch tree limb fell onto the road.

Thunderstorm Wind in CUSTER, MONTANA
From 07-JUL-21 19:01:00 to 07-JUL-21 19:01:00 (MST-7)
Location: FT KEOGH
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tree branches 4 inches in diameter were broken.

Thunderstorm Wind in SWEET GRASS, MONTANA
From 07-JUL-21 16:35:00 to 07-JUL-21 16:35:00 (MST-7)
Location: BIG TIMBER ARPT
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in SWEET GRASS, MONTANA
From 07-JUL-21 17:00:00 to 07-JUL-21 17:00:00 (MST-7)
Location: MELVILLE
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in PARK, MONTANA
From 07-JUL-21 17:12:00 to 07-JUL-21 17:12:00 (MST-7)
Location: WILSALL ARPT
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in WHEATLAND, MONTANA
From 07-JUL-21 17:15:00 to 07-JUL-21 17:15:00 (MST-7)
Location: JUDITH GAP
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Thunderstorm Wind in ROSEBUD, MONTANA
From 07-JUL-21 17:51:00 to 07-JUL-21 17:51:00 (MST-7)
Location: FORSYTH
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in YELLOWSTONE, MONTANA
From 07-JUL-21 17:55:00 to 07-JUL-21 17:55:00 (MST-7)
Location: ACTON
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in YELLOWSTONE, MONTANA
From 07-JUL-21 18:10:00 to 07-JUL-21 18:10:00 (MST-7)
Location: BILLINGS LOGAN ARPT
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in YELLOWSTONE, MONTANA
From 07-JUL-21 18:00:00 to 07-JUL-21 18:00:00 (MST-7)
Location: BROADVIEW
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in MUSSELSHELL, MONTANA
From 07-JUL-21 18:10:00 to 07-JUL-21 18:10:00 (MST-7)
Location: ELSO
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in YELLOWSTONE, MONTANA
From 07-JUL-21 18:34:00 to 07-JUL-21 18:34:00 (MST-7)
Location: HUNTLEY
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Thunderstorm Wind in CUSTER, MONTANA
From 07-JUL-21 19:35:00 to 07-JUL-21 19:35:00 (MST-7)
Location: VOLBORG
Magnitude: 71.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter