natural-disaster

How tornadoes form: supercells, wind shear, mesocyclones, Tornado Alley, EF scale, deadliest tornadoes, warning systems, and what to do during one.

The Yellowstone supervolcano produces a major eruption roughly every 600,000–800,000 years. The last was 631,000 years ago. If it erupted today, parts of the western United States would be buried in ash, global temperatures would drop, and agriculture would collapse for years.