Sentences with phrase «when updrafts»

When updrafts are vigorous, water drops are carried above the freezing level, a necessary ingredient for lightning.

When updrafts are vigorous, water drops are easily carried above the freezing level and some collide with fluffy ice crystals to make larger, denser ice pellets called graupel.

11 Roll clouds form when updrafts and downdrafts churn clouds into a long, spinning cylinder.

In fact, The Turby works best when some updraft is funneled up a minimum of six storeys.

Not exact matches

Fire whirls arise when superheated air above a wildfire drives strong updrafts and downdrafts that get sheared by the wind, causing them to twist into a vortex that funnels flames upward.

This is because terrestrial hurricanes form when an inflow of air along the ocean surface sops up moisture and rises in a halo of updrafts to create towering columns of rain clouds.

The intensity of the downdrafts and updrafts is vital, because in the end there needs to be a lot of stretching, which is when you take that existing rotation and turn it into something really violent like a tornado.

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.

Clouds form when water condenses on particles of dust, and rain falls when condensed water droplets grow too heavy to be suspended by updrafts in the atmosphere.

Supercell thunderstorms occur when the warm updraft punches through an overlying, stable layer and continues upward into a zone of cool, dry air.

It is easy to overwork in this bandha; you'll know you're getting it right when there's no hardening or gripping, but rather an updraft of breath and subtle energy.

A landspout, he explains, forms when dust gets sucked up by a storm's powerful updraft winds, whereas a tornado originates from a Wheel of Fortune Supercell.

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.

She found high levels of DCM (PDF), especially over the Indian subcontinent and Southeast Asia, and particularly during the Asian monsoon season, when strong updrafts fast - track air from the ground to the stratosphere.

Hailstones are created so it is believed, by a more or less continuous loop of being caught in violent updrafts as found in thunderstorms, ie; above glider example, and then falling out of the updraught cell back down to lower levels where they might be caught up again in another or the same updraft cell and so accumulate water and ice on the core of the frozen hailstone over a period of anywhere from just one passage in the updraft to a number of passages which can be ascertained and recognised by the number of rings when a hailstone is dissected across its diameter.

Clouds are negative feedback driven nucleation points — when daytime clouds start to form the albedo causes further cooling beneath them and heat - engine thunderstorms form from the updrafts of warm wet air lofted up to the stratosphere to efficiently cool and spread, creating a local convective cell that pulls heat out of the ocean (or the moist land or air) and moves it to a cold reservoir.

When the gust front gets under the updraft, it pulls up on the rotating air associated with the gust front, stretching it out, and causing it to spin faster... Both the source of rotation of the mesocyclone and the tornado ultimately come from environmental vertical shear, but a tornado can actually sometimes spin in the opposite direction.