Sentences with phrase «producing updrafts»

Not exact matches

Hailstones are produced by severe summer thunderstorms, when frozen water droplets are tossed within a cloud and accumulate bulk until they're too heavy for the updrafts to support.

Scientists know that storms with a rotating updraft on their southwestern sides — which are particularly common in the spring on the U.S. southern plains — are associated with the biggest, most severe tornadoes and also produce a lot of large hail.

What this argument fails to consider is that the greater SST also produces a more vigorous updraft, so that the rising moist air has less time in which the collision / coalescence process can work before the air reaches the upper cloud layers where spontaneous ice nucleation takes place (at somewhere around -40 C, reached near the top of the troposphere).

This hypothesis was quite quickly rejected when results began to conflict (there was more and bigger hail, or at least no detectable hail suppression as a result of the seeding) and it became understood that the seeding also produced stronger updrafts (due to the accelerated release of the latent heat of freezing by the silver iodide seeding), which, in turn, produced an environment which was conducive to the formation of even larger hailstones.

In general, clouds with more ice, and thus lower brightness temperatures, are more likely to produce lightning and to have moderate to strong updrafts and precipitation.

The temperature differential between the base and the top produces a powerful updraft.