A surface low across northeast Wyoming and associated cold front/pool across southeast Montana was the focus mechanism for the severe thunderstorms. Dewpoints in the 50s to lower 60s along with daytime heating and steep lapse rates all contributed to destabilize the atmosphere. This all resulted in a few isolated, but very severe, thunderstorms across the central and southeast portions of the Billings Forecast Area.

Hail in POWDER RIVER, MONTANA
From 19-JUN-15 15:09:00 to 19-JUN-15 15:09:00 (MST-7)
Location: COALWOOD
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Thunderstorm Wind in YELLOWSTONE, MONTANA
From 19-JUN-15 15:27:00 to 19-JUN-15 15:27:00 (MST-7)
Location: LAUREL MUNI ARPT
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Trees snapped off and uprooted.

Thunderstorm Wind in YELLOWSTONE, MONTANA
From 19-JUN-15 15:30:00 to 19-JUN-15 15:30:00 (MST-7)
Location: (BIL)LOGAN ARPT BILL
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Four trees were down on a Par 3 golf course.

Hail in POWDER RIVER, MONTANA
From 19-JUN-15 15:53:00 to 19-JUN-15 15:53:00 (MST-7)
Location: OLIVE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in YELLOWSTONE, MONTANA
From 19-JUN-15 15:59:00 to 19-JUN-15 15:59:00 (MST-7)
Location: (BIL)LOGAN ARPT BILL
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in FALLON, MONTANA
From 19-JUN-15 16:10:00 to 19-JUN-15 16:10:00 (MST-7)
Location: BAKER
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in FALLON, MONTANA
From 19-JUN-15 16:25:00 to 19-JUN-15 16:25:00 (MST-7)
Location: BAKER
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in POWDER RIVER, MONTANA
From 19-JUN-15 16:30:00 to 19-JUN-15 16:30:00 (MST-7)
Location: BELLE CREEK ARPT
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Hail in BIG HORN, MONTANA
From 19-JUN-15 16:39:00 to 19-JUN-15 16:39:00 (MST-7)
Location: GARRYOWEN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ROSEBUD, MONTANA
From 19-JUN-15 17:25:00 to 19-JUN-15 17:25:00 (MST-7)
Location: BIRNEY
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in YELLOWSTONE, MONTANA
From 19-JUN-15 15:40:00 to 19-JUN-15 15:40:00 (MST-7)
Location: (BIL)LOGAN ARPT BILL
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Multiple power lines were downed. Fence and siding damage were also reported.

Hail in YELLOWSTONE, MONTANA
From 19-JUN-15 15:35:00 to 19-JUN-15 15:35:00 (MST-7)
Location: (BIL)LOGAN ARPT BILL
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in YELLOWSTONE, MONTANA
From 19-JUN-15 15:35:00 to 19-JUN-15 15:35:00 (MST-7)
Location: (BIL)LOGAN ARPT BILL
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Some power lines were blown down just west of Billings.

Thunderstorm Wind in YELLOWSTONE, MONTANA
From 19-JUN-15 15:36:00 to 19-JUN-15 15:36:00 (MST-7)
Location: (BIL)LOGAN ARPT BILL
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A tree was uprooted.

Hail in YELLOWSTONE, MONTANA
From 19-JUN-15 15:40:00 to 19-JUN-15 15:40:00 (MST-7)
Location: LOCKWOOD
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported half-dollar size hail with a 59 mph wind gust. A spotter reported some roof damage with some shingles scattered about his property.

Hail in POWDER RIVER, MONTANA
From 19-JUN-15 16:00:00 to 19-JUN-15 16:00:00 (MST-7)
Location: POWDERVILLE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in CARTER, MONTANA
From 19-JUN-15 16:45:00 to 19-JUN-15 17:00:00 (MST-7)
Location: PINIELE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The tornado touched down briefly over open country.

Thunderstorm Wind in FALLON, MONTANA
From 19-JUN-15 15:30:00 to 19-JUN-15 15:30:00 (MST-7)
Location: WESTMORE
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel size hail was also reported.

Hail in FALLON, MONTANA
From 19-JUN-15 15:30:00 to 19-JUN-15 15:30:00 (MST-7)
Location: WESTMORE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in YELLOWSTONE, MONTANA
From 19-JUN-15 15:32:00 to 19-JUN-15 15:32:00 (MST-7)
Location: (BIL)LOGAN ARPT BILL
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A semi-truck and a crane were tipped over due to the high winds.

Thunderstorm Wind in YELLOWSTONE, MONTANA
From 19-JUN-15 15:33:00 to 19-JUN-15 15:33:00 (MST-7)
Location: (BIL)LOGAN ARPT BILL
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Thunderstorm Wind in YELLOWSTONE, MONTANA
From 19-JUN-15 15:40:00 to 19-JUN-15 15:40:00 (MST-7)
Location: LOCKWOOD
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in POWDER RIVER, MONTANA
From 19-JUN-15 15:45:00 to 19-JUN-15 15:45:00 (MST-7)
Location: OLIVE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in YELLOWSTONE, MONTANA
From 19-JUN-15 15:45:00 to 19-JUN-15 15:45:00 (MST-7)
Location: (BIL)LOGAN ARPT BILL
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ROSEBUD, MONTANA
From 19-JUN-15 17:50:00 to 19-JUN-15 17:50:00 (MST-7)
Location: ASHLAND
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in POWDER RIVER, MONTANA
From 19-JUN-15 17:51:00 to 19-JUN-15 17:51:00 (MST-7)
Location: BROADUS
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in POWDER RIVER, MONTANA
From 19-JUN-15 18:00:00 to 19-JUN-15 18:00:00 (MST-7)
Location: BROADUS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in POWDER RIVER, MONTANA
From 19-JUN-15 18:00:00 to 19-JUN-15 18:00:00 (MST-7)
Location: SAYLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Thunderstorm Wind in POWDER RIVER, MONTANA
From 19-JUN-15 18:00:00 to 19-JUN-15 18:00:00 (MST-7)
Location: SAYLE
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in POWDER RIVER, MONTANA
From 19-JUN-15 18:30:00 to 19-JUN-15 18:30:00 (MST-7)
Location: BIDDLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CARTER, MONTANA
From 19-JUN-15 16:45:00 to 19-JUN-15 16:45:00 (MST-7)
Location: HAMMOND
Magnitude: 4.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported softball size hail 2 miles north of Hammond on Crow Creek Road.

Hail in CARTER, MONTANA
From 19-JUN-15 16:40:00 to 19-JUN-15 16:40:00 (MST-7)
Location: BOYES
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in ROSEBUD, MONTANA
From 19-JUN-15 17:30:00 to 19-JUN-15 17:30:00 (MST-7)
Location: LAME DEER
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported a semi-truck blown over on Highway 212 near Lame Deer.

Hail in POWDER RIVER, MONTANA
From 19-JUN-15 15:52:00 to 19-JUN-15 15:52:00 (MST-7)
Location: OLIVE
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law Enforcement reported baseball size hail 10 miles northwest of Broadus on Highway 59. Car windows were smashed and damage to a residence was also reported.

Hail in CARTER, MONTANA
From 19-JUN-15 17:50:00 to 19-JUN-15 17:50:00 (MST-7)
Location: ALZADA
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Thunderstorm Wind in CUSTER, MONTANA
From 19-JUN-15 14:41:00 to 19-JUN-15 14:41:00 (MST-7)
Location: (MLS)WILEY FLD MILES
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in BIG HORN, MONTANA
From 19-JUN-15 16:59:00 to 19-JUN-15 16:59:00 (MST-7)
Location: CROW AGENCY
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in BIG HORN, MONTANA
From 19-JUN-15 17:00:00 to 19-JUN-15 17:00:00 (MST-7)
Location: KIRBY
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in BIG HORN, MONTANA
From 19-JUN-15 17:00:00 to 19-JUN-15 17:00:00 (MST-7)
Location: KIRBY
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BIG HORN, MONTANA
From 19-JUN-15 17:07:00 to 19-JUN-15 17:07:00 (MST-7)
Location: KIRBY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ROSEBUD, MONTANA
From 19-JUN-15 13:53:00 to 19-JUN-15 13:53:00 (MST-7)
Location: COLSTRIP
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ROSEBUD, MONTANA
From 19-JUN-15 14:00:00 to 19-JUN-15 14:00:00 (MST-7)
Location: COLSTRIP
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in YELLOWSTONE, MONTANA
From 19-JUN-15 15:45:00 to 19-JUN-15 15:45:00 (MST-7)
Location: (BIL)LOGAN ARPT BILL
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in YELLOWSTONE, MONTANA
From 19-JUN-15 15:34:00 to 19-JUN-15 15:34:00 (MST-7)
Location: (BIL)LOGAN ARPT BILL
Magnitude: 68.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Quarter size hail and a 78 mph wind gust was recorded at the National Weather Service office.

Hail in YELLOWSTONE, MONTANA
From 19-JUN-15 15:34:00 to 19-JUN-15 15:34:00 (MST-7)
Location: (BIL)LOGAN ARPT BILL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Thunderstorm Wind in YELLOWSTONE, MONTANA
From 19-JUN-15 15:35:00 to 19-JUN-15 15:35:00 (MST-7)
Location: (BIL)LOGAN ARPT BILL
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Trees were blown down at the 3000 block of King Avenue West.

Hail in CUSTER, MONTANA
From 19-JUN-15 14:41:00 to 19-JUN-15 14:41:00 (MST-7)
Location: MILES CITY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CUSTER, MONTANA
From 19-JUN-15 15:06:00 to 19-JUN-15 15:06:00 (MST-7)
Location: MILES CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Flash Flood in YELLOWSTONE, MONTANA
From 19-JUN-15 15:40:00 to 19-JUN-15 16:23:00 (MST-7)
Location: (BIL)LOGAN ARPT BILL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm producing hail and very heavy rain impacted the city of Billings. The 6th Street underpass closed due to high water. In addition, street flooding was reported at the intersection of 3rd and Grand Avenue, Grand Avenue  between 20th and 22nd street, as well as several other locations throughout the city.

Hail in YELLOWSTONE, MONTANA
From 19-JUN-15 15:35:00 to 19-JUN-15 15:35:00 (MST-7)
Location: LOCKWOOD
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter