Wild "fujiwhara effect" on display as multiple tornadoes just... touched down associated with the same mesocyclone in SE MO from DL Scales and Meteorologist Garrett Thompson.show more

Quick timelapse of tornado near Winner, South Dakota moments... ago! W/Meteorologist Garrett Thompsonshow more

This is about as textbook of a low precip... violent tornadoes as you can get. You have multiple vortices w/ the inflow surge to power the mesocyclone to the right of it. This was in Lake City, #Arkansas. 📹: Matt Ziegler (Facebook; link 🔗 below) #ARwx #severewxshow more

An incredibly rare situation as Imelda and Humberto *merge*... in the Northwest Atlantic – two active hurricanes combining into one larger, more powerful hurricane! On Tuesday morning, Humberto and Imelda were separated by just 476.4 miles – second place to the record for closest Atlantic hurricanes. (Two hurricanes in 1853 made it to within 428 miles of one another). When hurricanes pass within 800 or 900 miles of each other, they interact in a rare dance called the "Fujiwhara." Basically, they dance around each other. Humberto was initially a much stronger hurricane. Over the weekend, it yanked Imelda eastward. That technically means that a hurricane helped spare the U.S. a strike from another hurricane! How ironic and bizarre is that!? But now Imelda is the stronger hurricane. It has winds of 90 mph, and Humberto's winds are at 80 mph. In the next couple days, Imelda will ingest Humberto's vorticity, or spin, and the two low pressure systems will fold into one larger, more powerful low over the northwest Atlantic. It will probably retain hurricane-strength winds, and it's likely the Hurricane Center will allow Imelda to keep its name! The Fujiwhara effect has happened before – iconic examples of the Fujiwhara dance were observed with Odette and Seroja in the Indian Ocean in 2021, or Hilary and Irwin in the eastern Pacific in 2017. The Fujiwhara effect happens with atmospheric vortices of all scales. For nontropical (midlatitude) cyclones to be influenced by each other’s presence and interact, they need to be within about 1,500 to 2,000 miles. Their interaction becomes more intense once they’re within about 1,200 miles. Hurricanes are smaller, so that threshold is smaller. But even tornadoes orbit one another in Fujiwhara-like interactions! When a storm spawns multiple tornadoes simultaneously, the twisters tend to swirl around each other in a counterclockwise fashion. In fact, that happens regularly with what’s called cyclical tornadogenesis, or the process by which rotating supercells produce successive tornadoes. A dying twister is tugged ahead of its successor, then swirled left (north) into the rain and hail where it’s stretched into oblivion. As its predecessor dissipates, the new, stout tornado matures and begins tracing its large counterclockwise path. These handoffs can happen every 15 or 20 minutes in powerhouse thunderstorms. The Fujiwhara effect can even manifest within individual tornadoes. Most tornadoes contain smaller whirlwinds called subvortices. They last a few seconds each, and whip around the parent funnel. Individual subvortices can locally enhance the parent tornado’s wind field, leading to narrow swaths of extreme destruction. That’s why one home might be obliterated while a neighboring structure escapes unscathedshow more

🚨#BREAKING: Here are 48 hours worth of tornado warnings... spanning over the weekend, with multiple large and extremely dangerous tornadoes touching down. So far, over 118 tornadoes have been reported, resulting in 4 deaths in Oklahomashow more

Everyone's all hyped up Fujiwhara-ing tropical cyclones. Let's not... forget that each day of tornadoes during the April 25-28, 2011 Superoutbreak was the result of a conga line of shortwaves Fujiwhara-ing around a massive longwave:show more

Fujiwhara?? When two hurricanes interact, they can sometimes pivot... around one another. Next week there will likely be 2 tropical cyclones (perhaps 2 hurricanes) offshore. If they are strong enough, and are close enough, a #Fujiwhara may happen. Here’s how it works. Between the 2 storms is a pivot point (sort of like a fulcrum on a seesaw), it happens to be near where the sinking/ driest air is. If conditions are right we may see them pivot, or if one’s stronger (Bermuda hurricane) its force will sling shot the weaker one around it. Still not clear to what degree the Fujiwhara effect will be in effect, but it ought to be interesting! BTW Sakuhei Fujiwhara was the Japanese meteorologist who first observed the phenomenon. #hurricane WFLA NEWS #Humberto #Imeldashow more

Rosé from BLACKPINK just touched down at the Tiffany... Blue Box in NYC and the entire street lit up 📸✨show more

Rumour has it… Disney World’s Big Thunder Mountain refurbishment... is adding the same TNT effect as DL 🧨🏜️show more

Just touched down in the 305🤩

Just a great day on the lake Reed Timmer,... PhD Megan 🇮🇪 DL Scales Jaden Pappenheim Aaron Rigsbyshow more

Dear goodness. The cell northwest of Fort Worth is... moving southeast. It has two areas of rotation, both of which may be producing tornadoes. It just whipped both circulations westward… a highly deviant motion… AND its mesocyclones MAY be Fujiwhara-ing. Graphic from MyRadar Weather.show more

[MESSAGE FROM THE CLERGY] We wish to inform you... that Ghost has touched down in North America which means it's time to get #RitualReady! Display your ritual vestments with pride and adorn yourself in your finest offerings by tagging Ghost and using the sacred hashtags: #Skeletour and #RitualReady.show more

Gaza man opens TRADING TENT in the MIDDLE of... BUILDING RUINS MULTIPLE SCREENS display PEOPLE FIXATED on STOCKS as CHARTS swing RED and GREENshow more

UPDATE: Circumnavigation continues. Then Fujiwhara? …then ANOTHER cyclone following... the same path??show more