Today we have a special blog post on a new NTP tool for AI-assisted satellite review, with the method described by its developer - the NTP's Daniel Butt. The tool is being used experimentally and is already producing results. More on that shortly!

uwo.ca/ntp/blog/202...

The NTP has confirmed three EF2 tornadoes that occurred in NE Ontario near Englehart on July 12.

Satellite imagery was used to identify the tracks of significant tree damage.

Details at uwo.ca/ntp/blog/202...

#ONstorm

The NTP has confirmed a trio of tornadoes that occurred over northern Lake Erie on August 23.

Spray vortices were observed below funnel clouds with each of these waterspouts. There was no damage or injuries reported.

Details at the NTP blog here: uwo.ca/ntp/blog/202...

#ONstorm

After extensive analysis, the NTP is able to provide documentation for the 10 tornadoes that occurred as part of an outbreak in southern SK on June 19th. The outbreak included 2 EF2 and three EF1 tornadoes.

Full details at www.uwo.ca/ntp/blog/202...

#SKstorm

The NTP is confirming a tornado at Lucan, ON this afternoon.

The NTP's Director saw the tornado and conducted an initial damage survey, finding EF0 damage to trees and a farm structure (see images).

An NTP survey team will conduct a more thorough investigation in the area tomorrow.

#ONstorm

This week NTP teams will continue to process data collected over several recent surveys. The map below shows where ground and drone photos were taken in Samuel de Champlain Provincial Park after the June 21st storm, which will be available to view on our Open Data site in the coming weeks.

The NTP has confirmed that a tornado occurred near Saint-Raphaël, QC on June 23. The damage has been assessed as EF0. Details can be found on the NTP dashboard: uwo.ca/ntp/dashboard/.

#meteoQC #QCstorm

An NTP survey team will be arriving in Saint-Raphaël, QC today to investigate structural and tree damage reported after a storm on June 23. There were several other reports of isolated weak damage and possible funnel clouds from storms on this day that NTP continues to review.

An NTP team completed a drone and ground survey yesterday in Mallorytown, where they found downburst damage to trees over an area approx. 9 km long and up to 5 km wide. Damage assessed as EF0 (115 km/h).

Damage in several other areas impacted by the June 21-22 storms continues to be investigated.

The NTP ground/drone survey in Samuel de Champlain Park revealed strong downburst damage (at least EF1). Further investigation is needed to determine full extent and max. wind speed, though it does appear comparable in intensity with some of the strongest downburst damage NTP has seen to date.

A @westernuntp.bsky.social survey team will be in the Mattawa area today, where significant tree damage and several injuries were reported on June 21. NTP continues to collect data related to other areas of reported damage in eastern ON.

Please send reports via DM or to [email protected].
#ONstorm

FYI, from ECCC. The NTP had chosen to not confirm this tornado due to report inconsistencies. But we will now also remove the event from our records as an 'unclassified visual vortex' given the report has been discredited. #SKstorm

The NTP has confirmed a weak landspout-type tornado that occurred in southern Manitoba yesterday. Thanks to those that shared photos, video and eyewitness accounts.

Details at the NTP blog here:

uwo.ca/ntp/blog/202...

#MBstorm

The NTP has completed a third Tornado Warning Performance Assessment for Canada, this time covering 2023-2024. It includes a 'report card' on progress.

And we're happy to report that there has been progress - the overall score has improved enough to earn a 'C'.

Details here: uwo.ca/ntp/blog/202...

NTP's Annual Report for 2024 is now available!

The 2024 Canadian tornado season started Mar 16 and ended Nov 10 - the longest on record since at least 1980. And the 129 tornadoes for the year comes second only to 2022 when there was 131.

Press release and link: news.westernu.ca/2025/02/torn...

At the end of each year, NTP staff undertake a systematic review of satellite imagery to find any forest damage that may have been missed. In 2024, it turned up 14 new tornadoes. Add in a couple of stragglers, and the 2024 count goes up to 129. A busy year!

Details here: uwo.ca/ntp/blog/202...

The Northern Tornadoes Project has arrived at BlueSky!

To see what we're all about, check out our website at uwo.ca/ntp. And make sure to interact with our map of Canada's tornadoes via the NTP Dashboard at uwo.ca/ntp/dashboard. Now up to 113 tornadoes for 2024 (5 in November!). #WXbluesky

The Canadian Severe Storms Laboratory has launched 🚀. Backed by 60 years of expertise in #wind engineering—and a $20M gift from ImpactWX—it will revolutionize how we understand Canada’s most extreme #weather. At our new website, cssl.ca, you can watch a recording of the first CSSL Symposium.