Storm Events Database

Event Details:

Event Tornado
-- Scale EF1
-- Length 0.09 Miles
-- Width 66.67 Yards
County/Area PRAIRIE
Report Source NWS Storm Survey
NCEI Data Source CSV
Begin Date 2011-05-20 19:27:00.0 MST-7
Begin Location 8S TERRY
Begin Lat/Lon 46.6642/-105.3
End Date 2011-05-20 19:28:00.0 MST-7
End Location 8S TERRY
End Lat/Lon 46.6642/-105.3
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 75.00K
Crop Damage 0.00K
Episode Narrative A small EF-1 tornado occurred 8 miles south of Terry, MT. The NWS Glasgow office did a damage survey.
Event Narrative At approximately 8:27pm on May 20, a tornado struck a ranch 8 miles south of Terry on 10 Mile Road. The tornado was observed by a resident of the house on the ranch. The house itself received no damage, though it was about 150 feet away from observed damage. Significant damage occurred to 4 outbuildings on the ranch. There were no injuries and the horses on the ranch were uninjured as they were out in pasture at the time of the tornado. The damage path was about 500 feet and the width was 200 feet. Based on the damage, the wind speed was determined to be 90 mph or a low end EF-1 tornado.


Event Map:

Note: The tornado track is approximate based on the beginning (B) and ending (E) locations. The actual tornado path may differ from a straight line.

All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 0 0 75.00K 0.00K
TERRY PRAIRIE CO. MT 05/20/2011 19:27 MST-7 Tornado EF1 0 0 75.00K 0.00K
Totals: 0 0 75.00K 0.00K