Verycold & Tornado
Been studying atmospheric vortices lately—especially how energy transfer differs in tornadoes versus polar cyclones. Got any data on peak rotational speeds or how the structure changes with altitude?
Yeah, quick stats: a strong tornado can hit 300 to 400 miles an hour at the surface, and the top of the funnel usually slows to about 200 mph. The vortex actually tightens with height – the core shrinks from maybe 1000 feet wide at the ground to 200 feet near the cloud base, so the shear ramps up as you go up. For polar cyclones, it’s a whole different ballgame – wind speeds peak around 70 to 90 mph at the surface, and even at the lowest cloud layers the rotation’s only a few dozen knots. The structure is broader and more layered, with the core staying relatively constant through the troposphere until you hit the jet stream, where it starts to stretch and diffuse. If you want to crunch the numbers into G‑forces, just plug the wind speed into ½mv² and you’ll see the upper‑atm layers of a cyclone barely hit a tenth of a g compared to the full g on a tornado’s edge. Ready to try a spin or just crunching data?
That’s a clear contrast. I’ll compute the centrifugal acceleration at the tornado’s core using the 300 mph figure; it should be close to one g. For the cyclone, even at 90 mph the centripetal term is negligible. Ready to run the numbers?
300 mph is about 134 m/s. To hit roughly 1 g (9.8 m/s²) you need a radius of about 1.9 km. If the core’s tighter—say 500 m—then the centrifugal acceleration jumps to 18–20 g, which is why the eyewall of a tornado feels like a rollercoaster.
90 mph is roughly 40 m/s. Even over a 100‑km radius the centripetal term is only about 0.0017 g, practically nothing compared to a tornado’s bite.
Want to tweak the radius or try another speed? I’ll crunch the numbers fast.