The hail

It happened in the North Caucasus mountains. It was a warm and sunny day. Suddenly a hail... Managed to save only one shepherd. The hail took the lives of twenty of his comrades. It reached the diameter of 8-10 cm.

It was a warm and sunny day. Suddenly a hail...

Such tragic stories are, unfortunately, not uncommon. The greatest harm hail brings agriculture. Previously, only in the foothills of the North Caucasus, the Kuban and Stavropol, he beat out thousands of hectares of crops.

But hail can "tame". Scientists have invented ways to deal with his education. First you need to find a hail. Then fire at its special projectiles from anti-aircraft guns. Explosion inside the hail clouds, sprayed into its tiny crystals of silver iodide or lead. Microscopic crystals will be crystallization centers, which are beginning to grow into ice. A small hail that falls in the warm of the athmosphere, melts and falls as rain, without causing any harm.

Hailstones are formed in supercooled cloud due to accidental freezing of individual drops. In the future, they can grow to a significant size due to the freezing of colliding with them supercooled droplets and hailstones adfreezing together. Large hail can occur only in the presence of clouds, strong updrafts that can hold it for a long time.

A common form of hail - a conical or pyramid-shaped with sharp or slightly truncated top and rounded base. The upper part of hailstones is a soft, matte, as it were snow. The average is translucent, consisting of concentric, alternating between them transparent and opaque layers. The lower portion is the widest, is transparent.

The distribution of the hail depends on the latitude, but mostly on local conditions. In tropical countries, the hail - a phenomenon quite rare. More often it happens in the temperate latitudes. Where its distribution is based on the distance from the sea and a view of the land surface. Above the sea, he is less than over dry land, because it is necessary for the formation of ascending air currents, which are upon the dry land are more frequent and severe than over the sea.