Two episodes of severe weather were observed over this period. The first, on August 18, was related to a ridge breakdown by a strong shortwave. Dry low and mid levels resulted in deep inverted-V profiles, which were conducive to strong wind gusts.
The second episode of severe caliber gusts occurred on August 22nd. Moist southwesterly flow aloft, along with embedded shortwaves resulted in the developments of showers and thunderstorms across Central and Southwest Montana August 22nd. The area just experienced the remnants of Hurricane Hilary, which resulted in relatively moist lower levels, which in turn helped produce ample instability for severe thunderstorms.

Thunderstorm Wind in HILL, MONTANA
From 22-AUG-23 16:15:00 to 22-AUG-23 16:15:00 (MST-7)
Location: RUDYARD
Magnitude: 63.00 MG
Reported by: Mesonet

Measured by site EW1931 Rudyard.

Thunderstorm Wind in JUDITH BASIN, MONTANA
From 18-AUG-23 15:58:00 to 18-AUG-23 15:58:00 (MST-7)
Location: WINDHAM
Magnitude: 54.00 MG
Reported by: AWOS

Measured by military AWOS site k1cm Charlie.

Thunderstorm Wind in FERGUS, MONTANA
From 18-AUG-23 16:49:00 to 18-AUG-23 16:49:00 (MST-7)
Location: LEWISTOWN HOLLAND AR
Magnitude: 50.00 MG
Reported by: AWOS

Measured via military AWOS site K1nm November.

Thunderstorm Wind in BROADWATER, MONTANA
From 18-AUG-23 14:13:00 to 18-AUG-23 14:13:00 (MST-7)
Location: PLACER
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured via an Ambient Weather sensor near Winston (19MWL).

Thunderstorm Wind in GALLATIN, MONTANA
From 18-AUG-23 13:26:00 to 18-AUG-23 13:26:00 (MST-7)
Location: CHESTNUT
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station MTBZH Bozeman Pass measured a severe caliber wind gust.

Thunderstorm Wind in LEWIS AND CLARK, MONTANA
From 18-AUG-23 14:14:00 to 18-AUG-23 14:14:00 (MST-7)
Location: (HLN)HELENA RGNL ARP
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

ASOS station KHLN Helena Airport measured a severe caliber gust behind the main line of thunderstorms.

Thunderstorm Wind in BROADWATER, MONTANA
From 18-AUG-23 14:21:00 to 18-AUG-23 14:21:00 (MST-7)
Location: TOWNSEND
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

RAWS station GINM8 Ginger measured a peak wind gust of 58 mph. The station reports hourly so the time of the gust was estimated using radar.

Thunderstorm Wind in GLACIER, MONTANA
From 22-AUG-23 18:03:00 to 22-AUG-23 18:03:00 (MST-7)
Location: (CTB)CUTBANK MUNI AR
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

ASOS station KCTB Cut Bank Airport measured a severe caliber gust.

Thunderstorm Wind in HILL, MONTANA
From 22-AUG-23 16:35:00 to 22-AUG-23 16:37:00 (MST-7)
Location: HINGHAM
Magnitude: 65.00 EG
Property damage: 45.00K
Crop damage: 0.00K
Reported by: Public

A 40 x 60 metal shed destroyed from collapsing thunderstorm wind gusts. Nearby observations recorded wind gusts in excess of 70 mph.

Thunderstorm Wind in LEWIS AND CLARK, MONTANA
From 22-AUG-23 15:38:00 to 22-AUG-23 15:38:00 (MST-7)
Location: AUGUSTA ARPT
Magnitude: 50.00 MG
Reported by: Department of Highways

Measured by MT Department of Transportation site Bowmans Corner.

Thunderstorm Wind in LEWIS AND CLARK, MONTANA
From 22-AUG-23 15:39:00 to 22-AUG-23 15:39:00 (MST-7)
Location: AUGUSTA ARPT
Magnitude: 58.00 MG
Reported by: AWOS

Measured via military AWOS station K1GM Golf.