Hurricane Wilbur (2014)

Hurricane Wilbur (2014) was the largest hurricane ever. It had a 3000km eye, of which the inner 150km was exposed to the vacuum of space (0mb pressure). The innermost of 45 eyewalls consisted of a solid wall of ionized water vapour and atmospheric gases travelling at a velocity of 0.3c, or 3 tenths the speed of light. This made Hurricane Wilbur a category 6.2 million hurricane.