How is the weather forecast made?

Although human beings have long noticed some characteristics and laws of weather changes, the development of weather forecast in the modern sense is relatively late. How is the weather forecast produced? This should start with a war.

1853- 1856, the Crimean war broke out between tsarist Russia and Britain and France for the Balkan Peninsula. It was this war that led to the appearance of weather forecast. This is a huge naval battle.1854165438+10/4. When the two sides launched a fierce battle in the Black Sea of Europe, the storm suddenly came, the maximum wind speed exceeded 30 meters per second, and huge waves were set off on the sea, which almost wiped out the British and French fleets. Afterwards, the British and French allied forces were still concerned. The French War Department asked Le freire, director of the Paris Observatory, to study the cause and effect of the storm carefully. At that time, there was no telephone. Le Freire only wrote letters to astronomers and meteorologists all over the world from 1854 1 12 to 16 in October to collect local weather information from them. He received 250 letters at once. According to these data, after careful analysis, reasoning and judgment, Lefler Ray found that the Black Sea storm came from the vast Atlantic Ocean and swept across Europe from west to east. Two days before the accident, namely 1 12 and 13 in October, Spain and France in western Europe have been affected by it successively. Le freire looked at the drifting clouds in the sky, lost in thought: "This storm looks sudden on the surface, but in fact it has a process of development and movement. The telegraph has been invented. If a weather station is set up along the Atlantic coast of Europe and the storm is telegraphed to the British and French fleets in time, won't it avoid heavy losses? "

So, on March 1855 and 16, Lefler Lei made a report at the French Academy of Sciences, saying that if a network of weather stations was organized, the observation data were quickly concentrated in one place by telegraph, analyzed and drawn into a weather map, it would be possible to infer the running path of future storms. Le freire's unique idea has aroused strong repercussions in France and even the whole world. People deeply realize that accurate weather forecast is not only beneficial to marching operations, but also beneficial to industrial and agricultural production and daily life. Due to the needs of all sectors of society, with the active promotion of Le Freire, France established the world's first official weather forecast service system on 1856.