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If we know it's going to rain, we take the umbrella when we leave the house. But an important tip about time helps us in many other things. Among them, to assess road conditions when we travel, and also for agriculture.
Farmers often need to plant at the beginning of a rainy season, because seeds need water to germinate. On the other hand, forecasting floods, frost or lack of rainfall can prevent damage.
Meteorology is the science that studies the atmospheric conditions and, thus, helps in weather forecasting.
Technicians forecast the weather by studying various aspects of the atmosphere: air masses, cold or hot fronts, air humidity, place temperature, atmospheric pressure, etc.
Weather and climate
It is common for people to confuse the terms weather and climate. After all, what does each of them mean?
The term time corresponds to a situation at the moment. Indicates the atmospheric state at a given time and place. Today, where you live, it may be raining, but tomorrow it may be sunny. In the morning it can be very hot and in the afternoon everyone will be surprised by the arrival of a cold front.
The term climate corresponds to the most frequently occurring set of atmospheric conditions in a given region. For example, in the caatinga in northeastern Brazil, the climate is hot and dry, and rain may occur. Even when the weather is rainy, the weather remains the same (hot and dry).
Weather Forecasting Factors
The type of cloud in the atmosphere is a clue to weather forecasting. When we look at the sky and see dark, usually gray clouds, we soon think it will rain. The dark cloud has water droplets so close to each other that sunlight can barely get through them. And rain can form just as the droplets come together and form larger droplets that are no longer suspended in the atmosphere and fall.
Clouds can be at different altitudes and vary in shape depending on how the cloud rises and the air temperature.
Words that come from Latin are used to describe the various types of clouds.
- Cirros - High, white clouds. Cirru means 'snail' in Latin. Often these clouds look like white hair. They may be formed by ice crystals.
- Cumulus - White clouds forming large groups, like cotton flakes. Cumulu, in Latin means 'stack', 'heap'
- Strata - They form large layers that cover the sky, like a fog, and make the day cloudy. Estratu means 'layer'.
To describe the clouds we still use the terms nimbos and alto. Nimbos are dark gray clouds. The presence of nimbos in the sky is a sign of rain. Nimbos means 'rain bearer'. AND high They are high clouds.
These two terms can be combined to describe the various cloud types. Nimbus Cumulus, for example, are high clouds that usually indicate storm.