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westernuntp.bsky.social
Northern Tornadoes Project 🇨🇦
@westernuntp.bsky.social
960 followers 76 following 110 posts
Founded in 2017 at Western University with support from ImpactWX.com, NTP aims to detect and document all tornadoes in Canada and uncover Canada’s true tornado climatology. Now part of the Canadian Severe Storms Lab! See uwo.ca/ntp & cssl.ca.
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westernuntp.bsky.social
The NTP has confirmed 6 more Prairie tornadoes with ratings EF2 to EF0-Default. Four are based on AI-assisted satellite review of forest areas in AB / SK while two (plus an update of an existing tornado) in AB are based on reports from Riley Weekes. Details: uwo.ca/ntp/blog/202... #ABstorm #SKstorm
November 24, 2025 at 6:13 PM
westernuntp.bsky.social
The NTP has confirmed 11 new ON tornadoes based on AI-assisted satellite review. All caused EF1-EF2 tree damage.

These are in addition to 5 tornadoes already confirmed in ON via AI-assisted satellite review. All sectors in Ontario have now been reviewed.

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

#ONstorm
November 12, 2025 at 3:46 PM
westernuntp.bsky.social
The NTP has confirmed nine new Quebec tornadoes for 2025 based on our end-of-season satellite review, assisted by an AI detection algorithm. The damage in each case was only to trees, with one tornado rated EF2 and eight rated EF1.

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

#meteoQC
October 27, 2025 at 3:33 PM
westernuntp.bsky.social
The NTP has confirmed a tornado over water (waterspout) that was reported off the coast of Nova Scotia near Rocky Bay on October 25.

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

#NSstorm
October 27, 2025 at 2:48 PM
westernuntp.bsky.social
The NTP has confirmed a new tornado over water (waterspout) that occurred over Lake Huron northwest of Bayfield, ON yesterday.

Details at the NTP blog here:

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

#ONstorm
October 25, 2025 at 4:59 PM
westernuntp.bsky.social
The NTP has confirmed five concurrent tornadoes over water (waterspouts) over Lake Erie off Long Point on Oct 21.

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

#ONstorm
October 23, 2025 at 4:30 PM
Reposted by Northern Tornadoes Project 🇨🇦
westernu.ca
The @nytimes.com highlighted work from #WesternU's Northern Tornadoes Project to reclassify a tornado that tore through rural North Dakota in June as an EF5, the highest category on the Enhanced Fujita Scale. @westernuntp.bsky.social
Deadly North Dakota Tornado Was a Rare EF5, Weather Service Says
Experts reassessed the damage from a tornado that left three people dead in June, and gave it the strongest possible rating on the tornado scale.
buff.ly
October 14, 2025 at 9:15 PM
westernuntp.bsky.social
NTP partner 'The Weather Network' also has an article on the Enderlin, ND EF5 tornado that the NTP helped to rate. www.theweathernetwork.com/en/news/weat...
The U.S. sees its first EF-5 tornado in more than 4,400 days - The Weather Network
A violent, EF-5 tornado struck Enderlin, N.D., on June 20, 2025--the first instance of a twister given that designation in the U.S. since the Moore, Okla., event in May 2013.
www.theweathernetwork.com
October 7, 2025 at 2:15 PM
westernuntp.bsky.social
Good New York Times article on the upgrade to EF5 - mentioning that the Northern Tornadoes Project was called upon to assist. Gift article link so should be fully accessible.

www.nytimes.com/2025/10/06/w...
October 7, 2025 at 1:12 PM
westernuntp.bsky.social
The CSSL/NTP assisted the US National Weather Service (NWS) with their upgrading of the official rating of the June 2025 Enderlin, ND tornado from EF3 to EF5.

Announced by the NWS today, it’s the first EF5-rated tornado in the US since 2013.

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

Image B. Emfinger
Drone photo courtesy Brian Emfinger and used with permission.
October 6, 2025 at 6:16 PM
Reposted by Northern Tornadoes Project 🇨🇦
connellmiller.ca
Excited to announce that my method for estimating wind speeds based on lofted debris in tornadoes was used as contextual evidence for upgrading the Enderlin, ND tornado to an EF5!

doi.org/10.1175/MWR-...

#NDwx #Enderlin #EF5 #Tornado
October 6, 2025 at 3:38 PM
westernuntp.bsky.social
The first forested area to be searched with NTP's new AI tool - Northern Ontario east of Lake Superior - turned up five tornadoes, including one rated EF2. These were all manually verified and documented.

Details here:

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

#ONstorm

Lots more to come...
October 3, 2025 at 4:19 PM
westernuntp.bsky.social
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...
October 3, 2025 at 3:00 PM
westernuntp.bsky.social
Following a thorough satellite review for storm tracks of interest, the NTP has confirmed three new EF1 tornadoes from earlier in the season in Quebec.

The first two occurred on April 29 and the third on June 23.

Details at:

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

#meteoQC
October 2, 2025 at 3:39 PM
westernuntp.bsky.social
The NTP has confirmed three new tornadoes and upgraded a downburst damage rating in Northern Ontario.

Details here:

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

#ONstorm
October 2, 2025 at 1:05 PM
westernuntp.bsky.social
The NTP has confirmed four EF2 tornadoes in western Quebec during the late afternoon and evening hours of September 5. In each case there was considerable tree damage.

Full details can be found here:

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

#meteoQC
September 30, 2025 at 7:18 PM
Reposted by Northern Tornadoes Project 🇨🇦
davesills.ca
New paper alert!

"Multi-Level In-Situ Measurements During a Direct Hit by a Significant Tornado" in A-O.

Observations from a 2010 F2 tornado at a Harrow, ON-area wind farm show that peak winds do increase closer to the ground, supporting DOW radar measurements/analysis.

doi.org/10.1080/0705...
Multi-Level In-Situ Measurements During a Direct Hit by a Significant Tornado
A rare direct hit by a significant tornado on a weather station is documented, with a peak 1-s wind gust of 53.1 m/s (191.2 km/h) and a surface pressure deficit of 16.0 hPa recorded. Even more unco...
doi.org
September 16, 2025 at 2:36 PM
Reposted by Northern Tornadoes Project 🇨🇦
davesills.ca
With the 10 tornadoes added today from past months, the 2025 national tornado count goes to 66. Which is tied for 2017 at this point in the season for the *least* number of tornadoes since NTP began in 2017. And is almost half of what Canada experienced last year.

Will be looking into the why...
September 8, 2025 at 5:31 PM
westernuntp.bsky.social
An additional 4 tornadoes have been confirmed by NTP for Quebec from June based on satellite imagery review. There was 1 EF2 tornado and 3 EF1 tornadoes.

Details at the NTP blog here: uwo.ca/ntp/blog/202.... Tornadoes are plotted on a regional map below.

#meteoQC #QCstorm
September 8, 2025 at 5:07 PM
westernuntp.bsky.social
The NTP has confirmed an additional 6 tornadoes for the Prairie provinces based on witness reports - 2 in AB, 3 in SK and 1 in MB. An EF0-Default rating is assigned for each since no damage was reported or detected.

See the NTP blog for details: uwo.ca/ntp/blog/202...

#ABstorm #SKstorm #MBstorm
September 8, 2025 at 5:03 PM
westernuntp.bsky.social
The NTP has confirmed three tornadoes over Lake Erie from the evening of August 28.

See here for details: uwo.ca/ntp/blog/202...

#ONstorm
September 2, 2025 at 4:37 PM
westernuntp.bsky.social
The NTP has confirmed three new tornadoes in southern AB from June, all rated EF0-Default.

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

#ABstorm
August 30, 2025 at 2:41 PM
westernuntp.bsky.social
The NTP has confirmed that a downburst (paired with large hail) caused high-end EF1 damage in the Brooks, AB area on August 20.

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

Note that ongoing analysis may result in additional events and/or a rating upgrade.

#ABstorm #SKstorm
August 28, 2025 at 4:14 PM
westernuntp.bsky.social
The NTP has confirmed two EF1 downbursts (one being a microburst), an EF0 tornado and a gustnado from the SK storms of Aug 20 near Saskatoon.

The assessments are based on witness reports, an NTP damage survey, and radar/satellite imagery analysis.

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

#SKstorm
August 28, 2025 at 4:07 PM
westernuntp.bsky.social
The NTP has confirmed four additional tornadoes over water (waterspouts) that occurred in the Canadian waters of the Great Lakes in August.

See the following for details:

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

#ONstorm
August 26, 2025 at 2:59 AM