136K views · 480 reactions | This chaotic-looking animation shows vorticity (a fancy nerd term for spin 邏) in the upper atmosphere. These loops of high vorticity often correspond to low pressure at the earth's surface. This shows us that over the next 7-10 days NZ is likely to see slow-moving areas of low pressure periodically moving through our region with moderate to heavy rainfall, thunderstorms, and elevated humidity levels. ️ ~Seth | NIWA Weather | Facebook