Weather is a part of the earth’s atmosphere. Weather describes the day to day temperature in a particular area for a short period. Wind, cloud, temperature, humidity all are part of the weather. Weather is different from climate. Climate refers to a long period of weather conditions in a particular area.
Introduction about Weather
knowing the weather in advance is an obvious benefit-for farmers wondering about rainfall. Weather also helps sailors wondering about navigation. In modern times, pilots and passengers wondering whether inclement weather may affect air travel. With data gathered from networks of balloons, satellites, and other equipment, meteorologists can create reasonable short-term predictions. They can monitor local conditions closely enough to give advance notice of when tornadoes, hailstorms, or other dangerous events are likely to occur.
Weather forecast tools
The systematic analysis was not possible until the mid-19th century. Tools to measure basic variables like temperature and pressure were developed well before then. The development of the telegraph provided a missing link in the 1800s the ability to assemble data quickly from different geographic locations. At Washington’s Smithsonian Institution, Joseph Henry was preparing daily weather maps using telegraphed reports by 1849. Early meteorologists at the Cincinnati Observatory began preparing forecasts in 1869. Two years later the U.S. Army Signal Corps began the operation of the first network of national weather stations. In the 1930s radio had replaced the telegraph for communication. its observation balloons had replaced the naked eye for observation.
A global network of radiosonde balloons-so named for the observation equipment attached to them-were launched from different spots around the globe each day. The data feeding back about atmospheric conditions and allowing meteorologists to see what was happening at ever-higher heights. That system is in place today weather forecast system. Moder forecast system can give weather news within 12 hours from more than 800 locations around the world. The modern systems can pick data from about 11,000 ground stations. This information goes into supercomputers that. using complex models, forecast the weather for the coming days. Since 1960, the system has been augmented by satellites that give a view of cloud patterns and the movement of storms. Radar supplements the readings with more local data.
WHAT IS DOPPLER RADAR
By tracking changes in the speed and direction of wind and precipitation, Doppler radar helps detect when dangerous rotational patterns are developing-precursors to things like tornadoes and hurricanes. The installation of short-range Doppler radar at airports has given air traffic controllers the ability to know when conditions are ripe for microbursts or wind shear, a phenomenon that has caused planes to crash at takeoff and landing. Astronomers have applied the Doppler effect-the change in the wavelength of light emitted by a moving star-to show that galaxies are moving away from one another. Meteorologists use the phenomenon to improve their ability to warn of imminent climate.
WHAT IS RAIN?
Rain is one of the stages in the planet’s hydrologic cycle (also called the water cycle), the constant circulation of moisture through levels in Earth and its atmosphere. Evaporation transports water vapor from land and ocean to the atmosphere. Water returns to Earth in the form of precipitation. On land, was constantly seeks lower ground and ultimately flows into the ocean