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Unformatted text preview: storm are encouraged at this point although the lightning struck over a mile away. d) Red sprites are large, red, weak luminous flashes that occur simultaneously with lightning strokes, and typically occur over anvil portions of thunderstorms. The eyes cannot detect blue jets. However, using low-light television systems they have been observed to extend upward from the cloud top in narrow cones with speeds of 100 km/sec. 5. The updrafts and downdrafts in a storm cause the particles to be cycled by being blown upwards into the anvil of the storm, falling in the downdraft, captured by an updraft again, and so on. During each cycle the hailstone accretes ice crystals and water droplets. This is why hailstones have a layered structure....
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- Fall '08