3.3 Predicting the Weather
Terms in this set (15)
The first step in forecasting is to
Scientists who study the causes of weather and try to predict it.
maps, charts, and computers to analyze weather data and to prepare weather forecasts.
The National Weather Service uses
balloons, satellites, radar, and surface instruments to gather weather data.
Technological improvements in gathering weather data and using computers have
improved the accuracy of weather forecasts.
Weather balloons carry instruments high into the troposphere and lower stratosphere and
measure temperature, air pressure, and humidity.
Satellites orbit Earth in the exosphere, collect data on
temperature, humidity, solar radiation, wind speed and wind direction, and provide images of clouds and storm systems.
The National Weather Service has established a network of over 1,700 surface weather observation sites that provide
data on temperature, air pressure, relative humidity, rainfall, and wind speed and direction.
Scientists use computers to develop different models of how a front may move which helps
predict the weather.
A weather map is a
"snapshot" of conditions at a particular time over a large area.
Data from many local weather stations all over the country are
assembled into weather maps at the National Weather Service.
A line on a weather map that joins places that have the same air pressure.
A line on a weather map that joins places that have the same temperature.
Standard symbols on weather maps show
fronts, areas of high and low pressure, types of precipitation, and temperatures.
Accurate long-term forecasting is difficult due to the fact that a
small change in the weather today can mean a larger change in the weather a week later.
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