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Reposted by Canadian Severe Storms Lab

Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · 4d

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.

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Connell Miller @connellmiller.ca · 5d

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

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Canadian Severe Storms Lab @cssl.ca · 25d

Two new open access journal papers today from CSSL researchers!

Stochastic Modeling of Radar-derived Maximum Estimated Size of Hail for Scenario-based Hail Loss Estimation
doi.org/10.1016/j.ij...

Multi-Level In-Situ Measurements During a Direct Hit by a Significant Tornado
doi.org/10.1080/0705...

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Northern Hail Project @westernunhp.bsky.social · 26d

**Damage Survey Announcement: Following an extreme rainfall event and resulting flash flooding across SE Manitoba on Sept 11 & 12, a CSSL damage survey team will be conducting an assessment of the event's impacts. Please let us know if you have any rainfall and/or damage reports! #mbstorm @cssl.ca

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · Aug 28

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

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · Aug 28

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

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Dave Sills 🌪️🎶⚓ @davesills.ca · Aug 22

New Paper Alert! "Analysis of Forest-Based Tornadoes Using Treefall Patterns" in Monthly Weather Review, authored by our team at @cssl.ca and led by PhD candidate Daniel Butt. Based on this and other techniques, we may be able to re-rate some Canadian tornadoes.

journals.ametsoc.org/view/journal...

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Canadian Severe Storms Lab @cssl.ca · Aug 21

UPDATE: Two NTP teams will investigate wind damage, one in SE AB and one in central SK. The NHP will also have a team investigating hail damage in the Cassils / Brooks, AB area.

Please send significant damage reports to @ntp-reports.bsky.social and @nhp-reports.bsky.social. #ABstorm #SKstorm

Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · Aug 21

There are numerous reports of significant wind damage in southeastern Alberta from intense storms earlier today. Hail damage has also been reported.

An NTP survey team will leave tomorrow for the area to thoroughly assess the damage.

Please send damage reports to @ntp-reports.bsky.social. #ABstorm

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · Aug 21

There are numerous reports of significant wind damage in southeastern Alberta from intense storms earlier today. Hail damage has also been reported.

An NTP survey team will leave tomorrow for the area to thoroughly assess the damage.

Please send damage reports to @ntp-reports.bsky.social. #ABstorm

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Canadian Severe Storms Lab @cssl.ca · Aug 20

The Canadian Severe Storms Lab is excited to be a sponsor of the 41st AMS International Conference on Radar Meteorology in Toronto next week. Welcome to all those travelling from afar!

And it looks to be a stellar program - have a look here: www.ametsoc.org/ams/meetings...

#AMS41Radar

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Western University @westernu.ca · Aug 11

“Scientists-turned-storm chasers” are tracking down Alberta hail storms to better understand how to protect against them.
Researchers from the Canadian Severe Storms Laboratory ( @cssl.ca ) at #WesternU spoke with the @theglobeandmail.com about the Northern Hail Project.

In Alberta’s ‘Hailstorm Alley,’ scientists-turned-storm-chasers look into the eye of the storm for answers

Researchers from Western University aim to use data from hard-hit areas to help Canada better understand – and protect against – dangerous and costly hail damage

buff.ly

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Canadian Severe Storms Lab @cssl.ca · Aug 7

Follow the link below to a new article on the detection and prediction of 'extreme' thunderstorms by Drs. Sills and Kopp of the Canadian Severe Storm Laboratory. Published in The Conversation (Canada). Let us know what you think!

theconversation.com/its-challeng...

It’s challenging to predict extreme thunderstorms — improving this will help reduce their deadly and costly impacts

Current models for weather forecasting tend to ignore outlier data; learning how to incorporate these can help reduce risk and increase community resiliency.

theconversation.com

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TELUS Spark Science Centre @telus-spark.bsky.social · Jul 22

Spark had the best rainy day with the Canadian Severe Storm Lab. Guests got to learn how the Northern Hail Project team tracks down the perfect #storm and the tools used to get hail data!

They also showed off their storm-chasing vehicles and surveillance drones. ⛈️

Thanks for coming @cssl.ca!

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Western University @westernu.ca · Jul 21

Calgary has a long history of intense hailstorms, and this summer is no different.
@weathernetwork.bsky.social spoke with #WesternU hail researcher Matthew Woodward, who is on the ground documenting damage from a recent storm for @cssl.ca

Hail damage across Calgary has teams documenting the fallout - The Weather Network

Researchers from Western University are closely examining the damage caused by a hailstorm in Calgary on July 13 to improve preparations for this recurring type of event. Connor O'Donovan reports.

buff.ly

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Canadian Severe Storms Lab @cssl.ca · Jul 16

What Canada could learn from the tragic consequences of the Texas flash flood (written by Dr. Gordon McBean) theconversation.com/what-canada-...

What Canada could learn from the tragic consequences of the Texas flash flood

Flash floods are increasing in frequency, severity and impact. The Canadian government needs to learn from the Texas tragedy and co-ordinate weather information and warning systems.

theconversation.com

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AMS41Radar 2025 Toronto @ams41radar.bsky.social · Jul 8

Come here…to Toronto!
Registration is now open for the @ametsoc.org @ametsoc-radar.bsky.social 41st International Conference on Radar Meteorology!

www.ametsoc.org/ams/meetings...

a bald man with a ring on his finger is pointing at the camera

ALT: a bald man with a ring on his finger is pointing at the camera

media.tenor.com

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · Jul 10

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

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Canadian Severe Storms Lab @cssl.ca · May 30

The CSSL is featured in the current episode of CBC Radio's Quirks and Quarks! Head here for the link to the audio:

www.cbc.ca/radio/quirks...

Thanks to our colleagues Harold Brooks, John Allen, Paul Kovacs and Tanya Brown-Giammanco for contributing.

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Canadian Severe Storms Lab @cssl.ca · May 14

Big crowd for this month’s CSSL Seminar now that all of the interns have started (there are even more online). Speaking today is Dr. Connell Miller, Director of CSSL’s Northern Mesonet Project (@westernunmp.bsky.social), on experimental tornado wind estimation methods. @westernuresearch.bsky.social

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · Apr 13

The NTP has confirmed that a tornado occurred in southern Alberta near Rolling Hills yesterday. Analysis of photos/video, radar and storm environment indicates that this was a 'landspout'-type tornado. It is also the first recorded tornado of the year in Canada. Further details soon. #ABstorm

Brandon Houck @houckispokisewx.bsky.social · Apr 13

Another incredible photo of the landspout tornado half an hour ago near Tilley and Rolling Hills from Bantry Seed Farms #abstorm

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · Apr 3

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 Tornado Warning Performance Assessment cover page

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Northern Mesonet Project @westernunmp.bsky.social · Feb 5

A very big update is now live on the Canadian Mesonet Portal! This includes new meteorological variables, saving / exporting settings and more! For more details, you can check out the link below. But here are the main highlights for you to see in a 🧵:

www.uwo.ca/nmp/news/202...

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Northern Tornadoes Project 🇨🇦 @westernuntp.bsky.social · Feb 6

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...

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Canadian Severe Storms Lab @cssl.ca · Jan 21

There is one remaining online info session for those interested in CSSL intern opportunities - Jan 23 at 7 pm ET. Note the application deadline is Jan 27.

You can learn more about the CSSL internship program and how to register for the info session here: westernuniversity.zoom.us/meeting/regi...

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European Severe Storms Laboratory @essl-ecss.bsky.social · Jan 18

The sad news reached us that Chuck Doswell has passed away. ESSL will be forever grateful for his intensive engagement. With his unique talent to reduce severe storm science to its core and his engaging style of teaching and friendliness he has made an enormous impact on European storm research.

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