August 5 downburst at Tilley, AB rated EF1
NTP investigation, including an NTP ground/drone survey, has resulted in the confirmation of a downburst at Tilley, AB during the late evening hours of August 5. A storm resulted in significant damage to several agricultural structures as well as tree damage. The downburst winds were from the SW through WNW. The worst of the damage was rated EF1 on the EF scale.
Details are provided below, as well as maps and photos. The event can be plotted on a map via the NTP Dashboard .
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Event Name: Tilley, AB
Date: August 5, 2024
Start Time: 11:00 PM MDT (0500 UTC)
Final Classification: Downburst
Final EF-Scale Rating: EF1
EF-Scale Damage Indicator / Degree of Damage: SBO/DOD-4
Location of worst damage: 50.4083N, 111.7748W
Description: Structural damage was reported in the Tilley area after a storm passed through. No injuries were reported. An NTP ground and drone survey was completed on August 12, 2024, documenting the reported damage and discovering additional structural and tree damage along the storm track, including moderate damage to a barn roof southwest of Tilley. Intermittent damage was documented over an area approximately 21.1 km long and up to 8.7 km wide from the eastern shore of Lake Newell to south of Tilley. Damage assessed as EF1 downburst, with an estimated max. wind speed of 145 km/h. Start time is radar estimated. Satellite imagery review revealed some signs of structural damage.
Regional map showing the location and rating of the downburst at Tilley, AB.
Survey map showing the extent of the EF1 downburst and the locations of ground and drone photos.
Drive shed with roof thrown and most walls down.
Farm outbuilding building was severely damage, with flying debris causing the failure of concrete stave silo.
Warehouse building with roof damage.
