August waterspouts in ON and NS
The NTP has confirmed the occurrence of two waterspouts in Ontario (August 3 and 17) and two waterspouts in Nova Scotia (August 13 and 16). The Ontario waterspouts were on Lake Erie (Erieau) and Georgian Bay (Bowers Beach), respectively, and the Nova Scotia waterspouts were on the Gulf of St. Lawrence (Margaree Harbour) and the Atlantic Ocean (Glace Bay), respectively.
A waterspout is simply a tornado over water, and since these waterspouts did not move ashore, they are classifed as Tornado (over water). And since there was no damage recorded they have each been assigned an EF0-Default rating.
More details in the event summaries below as well as a map. The tornadoes can also be plotted on a map via the NTP Dashboard .
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Event Name: L Erie (Erieau, ON)
Date: August 3, 2024
Start Time: 7:44 AM EDT (1144 UTC)
Final Classification: Tornado (Over Water)
Final EF-Scale Rating: EF0-Default
Estimated Tornado Location: 42.00N, 81.95W
Description: A witness captured video of a waterspout over Lake Erie south of Erieau. No damage was reported. Event time is based on witness report.
Event Name: Gulf of St. Lawrence (Margaree Harbour, NS)
Date: August 13, 2024
Start Time: 3:40 PM ADT (1840 UTC)
Final Classification: Tornado (Over Water)
Final EF-Scale Rating: EF0-Default
Estimated Tornado Location: 46.48N, 61.19W
Description: Witness in Margaree Harbour on Cape Breton Island captured photos of a waterspout over the Gulf of St. Lawrence. No damage was reported. Event time is based on witness report.
Event Name: Atlantic Ocean (Glace Bay, NS)
Date: August 16, 2024
Estimated Start Time: 7:30 AM ADT (1030 UTC)
Final Classification: Tornado (Over Water)
Final EF-Scale Rating: EF0-Default
Estimated Tornado Location: 46.23N, 59.91W
Description: Witness in Glace Bay captured photos of a waterspout over the Atlantic Ocean. No damage was reported. Event time is roughly estimated based on details shared in witness report and radar imagery.
Event Name: Georgian Bay (Bowers Beach, ON)
Date: August 17, 2024
Start Time: 4:00 PM EDT (2000 UTC)
Final Classification: Tornado (Over Water)
Final EF-Scale Rating: EF0-Default
Estimated Tornado Location: 44.50N, 80.13W
Description: Witness in Bowers Beach captured video of a waterspout over Georgian Bay. No damage was reported. Event time is based on witness report.
Regional map showing the locations of the four August waterspouts in ON and NS.
