Storm warning: conditions and characteristics

Surely each of us could hear from the TV screens or from the speakers of radio receivers a mashed phrase: "A storm warning is announced". In the mind of the majority there is an image: a dense storm curtain, now and then torn by the wind, trees bent before the force of the elements and a couple of unlucky passers-by who by fate's fate found themselves on the street.

But do everyone know what the nature and laws of this meteorological phenomenon are? Let's understand.

A storm (or storm) is called an extremely strong wind (or an impressive wave on the sea). A storm warning is also announced when large snow falls are expected. This natural phenomenon can pose a threat to people's lives and the infrastructure of settlements. Particularly affected by the storm power lines, structures made of glass and light metals, as well as green plantations.

Great trouble is expected when a storm warning is announced in Moscow and other large cities with a busy traffic. Winds and rains destroy ground rocks, because of what asphalt can literally fall through under cars. Frequent after the storm, transport collapses and traffic paralysis are not uncommon in large areas.

American scientists have established that in the northern latitudes a storm warning should be announced in cases where the wind speed reaches thirty-five miles per hour (or fifty-six kilometers).

With the development of a wind speed of sixty kilometers per hour, the storm gets its own name.

Scientists-meteorologists identify several reasons for the occurrence of a storm:

• Cyclone (can be both tropical and other etiology) passing through the territory;
• Tornado, thrombus or tornado;
• Local or frontal thunderstorm.

The speed of the wind during a storm exceeds twenty meters per second (when measured at the surface of the earth). When the indicator reaches thirty meters per second, the storm officially passes into the category of "hurricane". If such an increase in speed is of a short duration, then the races are called squalls.

A storm warning is announced when meteorologists predict a wind speed exceeding nine on the Beaufort scale. Also on this scale, the intensity is classified:

• A strong storm (ten points in Beaufort or 28.5 m / s);
• A severe storm (eleven points in Beaufort or 32.6 m / s).

Depending on the place of formation, storms are:

• Tropical;
• Subtropical;
• Hurricane (area of the Atlantic Ocean);
• Typhoon (Pacific region).

The most famous storms and their consequences

In 1824 Saint Petersburg was completely flooded. As a result of the strongest wind and unrest, the Neva and its canals came out of the water. There was a rise in water by 410 centimeters. It is noteworthy that the weather deteriorated sharply the day before the turbulence of the elements, a storm warning was announced, but many residents neglected warnings and went for a walk on the embankment.

In 1931, the densely populated Chinese city of Gaoyu and its environs underwent a severe flooding. During the monsoon rainy season , the Yellow River came out of the banks . As a result, more than three hundred thousand hectares of land was under water. About forty million Chinese remained without a roof. In some places, according to eyewitnesses, the water was still about six months.