**Storm Report: Just after 1 PM today, a storm affecting northern portions of London ON produced large hail, w/ one oddly shaped specimen reaching 51 mm in maximum diameter. A quick inspection of these areas, however, revealed only minor tree damage (leaf shredding) and damage to local gardens. 1/2

**Important Announcement** This Thursday, July 16th, the Northern Hail Project (NHP), along with members of the City of Calgary led Hail Resilience Improvement Network (HRIN), will be running a special series of exhibits and demonstrations on all things #hail at the TELUS Spark Science Centre! 1/3

NHP Field Operations - Mission Today - July 16, 2026 NHP Field Teams have deployed to areas E of Calgary today (June 16) in anticipation of the potential for damaging, wind-driven hail. #abstorm If it is safe to do so, please send us any damage/hail reports you may encounter from today's storms!

**First Update** Ongoing Hail and Extreme Rainfall Damage Surveys for June 6-9 Outbreak Sequence MB and SK Our survey teams have been busy documenting hail and extreme rainfall impacts from last week's storms. Detailed press release can be found here: www.facebook.com/share/p/1JZY... 1/2

**Survey Announcement** #MBstorm #SKStorm Several CSSL survey teams are currently conducting assessments of wind, hail, and flash flood impacts from the multi-day series of storms that have affected large swaths of Manitoba and Saskatchewan June 6th through June 9th (1/3)

With today's severe weather threat and the possibility of large hail in SE SK and SW MB, I'd like to encourage everyone to measure any hail they may find. First and foremost, only do so when it's safe and take cover when severe weather approaches. (1/2) #skstorm #mbstorm

This helps both the forecasters at ECCC with weather warnings and the Northern Hail Project. Please store any large or giant hail you may find using the steps provided in the infographic and contact the NHP. (2/2) @westernunhp.bsky.social

**Severe Weather Outbreak Expected Today** #skstorm #mbstorm During today's events, if it is safe to do so, we are very interested in getting your hail reports. The attached infographics provide guidance on how to report and store hail. Stay safe out there today everyone!

**Important Announcement!** Today, we congratulate NHP graduate student Julia Finlayson on the successful defense of her master's thesis, entitled "Development of a Low-Cost, Novel Piezoresistive Polymer Hail Sensor" under the supervision of Drs. Gregory Kopp and Julian Brimelow. 1/2

*Survey Announcement* Due to the rare nature of last week's hail event, researchers from the NHP & NTP will be conducting a damage survey tomorrow (March 21) of the region S and SW of Hopeville. Please let us know if you have any damage reports or other info! #onstorm @westernuntp.bsky.social

Northern Hail Project@westernunhp.bsky.social · 5mo ago

Seeking Hail & Damage Reports #ONstorm: At around 1 am, a hailstorm tracked NE of Mount Forest (see MRMS MESH below), with reports of hail over 40 mm in diameter and some vehicle damage (cracked windshield). Investigation is ongoing. Please forward any information you may have on this event! 1/2

**Follow-Up** March 11 Hail Event #Onstorm: A review of available historical data indicates that hail reported in the Hopeville area is the *largest* on record in March for both Ontario and Canada as a whole. Imagery from this event shows hail of at least 42 mm, poss exceeding 45 mm. 1/2

Northern Hail Project@westernunhp.bsky.social · 5mo ago

Seeking Hail & Damage Reports #ONstorm: At around 1 am, a hailstorm tracked NE of Mount Forest (see MRMS MESH below), with reports of hail over 40 mm in diameter and some vehicle damage (cracked windshield). Investigation is ongoing. Please forward any information you may have on this event! 1/2

Seeking Hail & Damage Reports #ONstorm: At around 1 am, a hailstorm tracked NE of Mount Forest (see MRMS MESH below), with reports of hail over 40 mm in diameter and some vehicle damage (cracked windshield). Investigation is ongoing. Please forward any information you may have on this event! 1/2

**Big Announcement** The first CSSL Annual Report for the 2025 storm season is out! Updates on the NHP, NTP, and NMP's activities are now all in one convenient report. 👇👇👇Please see the link in the post below 👇👇👇 @westernuntp.bsky.social @westernunmp.bsky.social @cssl.ca

Canadian Severe Storms Lab@cssl.ca · 5mo ago

The first CSSL Annual Report - covering the CSSL's inaugural full year in 2025 - is now available! Please visit uwo.ca/cssl/news.html to download a copy.

**Winter Hail in SW Ontario!** We have received numerous hail reports from last night's (Feb 18) thunderstorms in SW Ontario, w/ the largest est hail size from the Brigden area at ~24 mm. Hail reported in several other locations (London, St Thomas, Strathroy) was generally smaller ~5 to 10 mm. 1/3

Mike 🇨🇦@ontariowedges.bsky.social · 6mo ago

@westernunhp.bsky.social Lambton County public hail reports from our Lambton weather group Courtright: nickel size Alvinston: dime size Brigden: dime size Oil Springs: dime size Inwood: dime size Two pics are from the Courtright area showing nickels.

*CSSL Summer Internship - Applications Closing Soon* For those still interested in applying to the CSSL summer internship program, you still have until Monday, January 26, to get your applications in! Details and application forms located here: www.uwo.ca/cssl/interns...

*Important announcement!* CSSL Summer Internship Program applications are now live! Spend the summer chasing hailstorms, documenting tornado impacts, and contributing to world-class storms research. Details and applications located here: uwo.ca/cssl/interns... Applications close January 26th.

Dive into real-world research and fieldwork with the CSSL Summer Internship Program! Learn more and apply here: uwo.ca/cssl/interns... Don't miss your chance to gain hands-on experience with leading tornado and hail experts in the field. Applications close on January 26th.

Dive into real-world research and fieldwork with the CSSL Summer Internship Program! Learn more and apply here: uwo.ca/cssl/interns... Don't miss your chance to gain hands-on experience with leading tornado and hail experts in the field. Applications close on January 26th.

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

**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

“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

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**Damage Survey Announcement #abstorm: Yesterday (July 27) a major hailstorm tracked from W of Twin Butte, through Cardston, E to the Shanks Lake area. An NHP damage survey team will begin data collection tomorrow. Please forward us any information you may have on this event!

**Seeking Hail Reports: Calgary was affected by a potentially damaging hailstorm this evening (July 13) between 7:45 & 8:15 PM MT, tracking SE from the NW corner of the city to S of Chestermere. Please send us your hail and hail damage reports, and if you can, save some samples! #abstorm #Calgary

**Survey Announcement: The CSSL’s Winnipeg team is conducting a damage survey of hail impacts in the Reston area following a major storm on the evening of July 3rd with radar estimated hail larger than baseballs (see MRMS MESH below). Let us know if you have any information on this storm! #MBstorm

**Survey Announcement: Yesterday (July 9), NHP Field Ops intercepted a damaging thunderstorm near the communities of Acme & Carbon, AB. A damage survey of the combined impacts of wind & hail in the area will be conducted later today. Let us know if you have any information on this storm! #abstorm

The NHP has been busy preparing for field operations, both at home and abroad! For the #ICECHIP field campaign, the NHP and Western's UMS designed and built 4 platforms which collect and preserve hailstones, capture high-speed video of falling #hail, and measure hail fall speed with a small radar.

The Northern Hail Project is now active on Bluesky! Through our new Bluesky accounts, we hope to continue to engage with experts, citizen scientists, and other stakeholders to build on our knowledge and understanding of damaging hail across Canada.