Bram van 't Veen

Cumulus

Cumulus, winter supercell

Radar screenshot

Radar screenshot

That's certainly a surprise for December 6th

In normal Jersey things, 3 waterspouts were spotted off the coast earlier today.
www.facebook.com/groups/jerse...

New video of the tornado in Apulia from yesterday. So far we managed to find a 1.5 km long path in the populated area, but NOBODY documented the countryside north of there. A 5-7+ km path is very plausible

Today Apulia has never been this Great Plains-esque. Insane supercell and tornado in the Manduria area (we're working on the damage... frustrating is quite reductive). Videos by Fausto Perretti and Giuseppe Mauro (below)

Perfect demonstration of the fact that you don't need straight hodographs to get left-moving supercells

(In this case, storms are rooted at ~2km)

Hello, that's a very interesting error that I haven't seen before... Does the command line window maye give an error message?

Looking back at a great #ECSS conference last week, where I also gave my first conference talk. It was great to meet people that I so far had only met online, and to reconnect with many others! Also first time I saw in person a number of big names in svr storms from the US @essl-ecss.bsky.social

From 4/27/2011, a short multi-tilt storm-following loop from ARMOR of the Hackleburg tornado. Some pretty incredible temporal resolution is possible like this when you interleave the different tilts! You get some shakiness but overall this turned out quite incredible. Love the merger stream!

In the end, today we confirmed five tornadoes (landfalling waterspouts), three of which can be rated (IF0.5, IF1 and IF1.5). Two more additional possible tornadoes occurred, but those will have to wait

A tornado🌪️ wreaks havoc at a campsite in #Albufeira, Portugal. One person has died and several are injured.

#Albufeira #Portugal #Tornado
😱🙏💫

The greatest atmospheric ballet! Large, highly visible snow mesovortices rolling down a convergence band over Lake Michigan on 2024/01/19. Perhaps the most beautiful radar data NEXRAD has ever produced. This is a 14 hour loop showing the ridiculously high number of them that developed sequentially

Appears a destructive tornado struck the city of Rio Bonito do Iguaçu, Paraná, Brazil this afternoon with a severe weather outbreak. Profile from neighboring Argentina shows extreme low level shear for South American standards. 50 kt winds at 1 km AGL. www.facebook.com/reel/1345539...

8 months ago I had a vision: what if we had a unified, track-based dataset of all severe events?

Still a lot of improvements I can make to the algorithm itself, but otherwise, looks like we have one now. I can't wait to see what we can do with this 👀

Tornado tracks by rating (left) and duration (right)

While highly rated/long-tracked tornadoes are biased towards the Southeast, long-duration tors are found even up to the High Plains.

Credit to @theasandmael.bsky.social for her incredible dataset!!

🌪️Publication du rapport sur la tornade qui a frappé le Val-d'Oise le 20 octobre : urlr.me/kbHN6A Intensité EF2 et trajectoire totale de 21 km. 4 autres tornades ont été observées le même jour ; les rapports viennent d'être publiés également.

Late yesterday evening featured some strongly rotating storms over the Irish Sea, which were nicely captured by the Dublin radar. Had they occurred over land, we would likely have seen tornado reports.

From the L'Ora newspaper

Via Vincenzo Recca

Via Vincenzo Recca

OTD in 1964 one of Sicily's black tornado days: a first twister developed in the sea and impacted the town of Santa Croce Camerina, where it killed 5 people and injured 70+. Cars were lofted and homes/farms destroyed (rating pending, further documentation can be gathered)

NEW: Devastating imagery from Jamaica, before & after Category 5 Hurricane Melissa.

Black River — near total destruction.

Multi-panel view of the last few days of Hurricane Melissa:

↖️ GOES-19 infrared brightness temp
↗️ GOES-19 visible satellite
↙️ Hurricane hunter planes & flight paths
↘️ Recon-derived flight level wind swath
⬇️ Estimated minimum pressure from recon dropsondes

Annotating a long 3+ day loop of #Hurricane #Melissa from Kingston, #Jamaica radar.

2️⃣ periods appear where an eyewall replacement cycle, #ERC, looked underway. In both cases, inner eyewall stayed intact & outer bands merged, resulting in a larger eye & strengthening after.

A remarkable evolution 🌀

The start point of the path here nicely matches up with the location where the presumed TDS first appeared, increasing confidence that it was indeed a TDS.
Note by the way that the strong looking couplet on the third image is a dealiasing failure. First image provides most useful doppler data.

🟢 Am 23.10.2025 zog ein #Tornado durch #Siebersbach bei #Sulzbach an der #Murr (Baden-#Württemberg). Es kam zu teils erheblichen Sach- und Vegetationsschäden entlang einer über einen Kilometer langen Schneise, die das #Lautertal quert.

⬇️ Analyse:
www.torkud.de/post/vsieber...

October 27th, 1913:
An outbreak of at least eight tornadoes impacted England and Wales. One tornado caused estimated F3 damage to the Taff Valley towns of Abercynon and Edwardsville, where many houses were unroofed.
1/2

Possible tornado in SW Germany yesterday. And possibly with a radar-detected TDS, as there is a small CC hole at the location of reported damage.
At least this CC hole is not from ground clutter (as is the case for quite some of the green spots in the RGB), as it's not visible at surrounding times.

D'autres tornades en France hier ?

La tornade meurtrière d'Ermont a largement été couverte par les médias, et c'est bien normal. Mais celle-ci ne doit pas occulter d'autres événements survenus hier et qui méritent notre attention. Thread à dérouler :

Radar loop of the low-topped supercell that produced yesterday's deadly tornado in France: streamable.com/wpo049. The lack of the nearby Trappes radar sadly meant that the storm wasn't sampled below 2 km AGL, which is quite a limitation. But we can see a clear supercell structure with mesocyclone.

Tornadoes in France today. At least one death and 9 injuries, unfortunate but somewhat inevitable when a significant tornado (seems to be at least an IF2 to me) strikes such a populated area. Europe has a severe lack of tornado awareness and when a violent one will strike a highly populated area...

No CC drop near Metz and rotation weakened just before passing over the northern part of the city, so it seems like they dodged a bullet.

We are not yet done in France. Strong rotation near Metz now, suggesting tornado potential. I'm also seeing a small CC minimum for 2 scans now, which might be a small TDS.