Forecasting Weather What is it A weather forecast

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Forecasting Weather

Forecasting Weather

What is it ? ? • A weather forecast is a of weather conditions

What is it ? ? • A weather forecast is a of weather conditions over the next 3 -5 days • A is a person who observes and collects data on atmospheric conditions to make weather predictions.

Technology • Meteorologists need to measure various atmospheric conditions : air pressure, humidity, precipitation,

Technology • Meteorologists need to measure various atmospheric conditions : air pressure, humidity, precipitation, temperature, wind speed, and wind direction • Weather Balloon

Technology • Thermometertool used to measure temperature • Barometerinstrument used to measure air pressure

Technology • Thermometertool used to measure temperature • Barometerinstrument used to measure air pressure • Anemometerinstrument used to measure wind speed

Radar and Satellites • Radar is used to find location, movement, and amount of

Radar and Satellites • Radar is used to find location, movement, and amount of precipitation • Using Doppler radar meteorologists can predict a tornado up to 20 minutes before it touches the ground

Weather Maps • In the U. S. , the national weather service ( NWS),

Weather Maps • In the U. S. , the national weather service ( NWS), and the national oceanic& atmospheric administration ( NOAA) collect and analyze data • The NWS produces weather maps based on 1, 000 weather stations across the U. S. • On these maps, each station is represented by a station model

Station Model

Station Model

Reading a Weather Map • Weather maps that you see on TV include lines

Reading a Weather Map • Weather maps that you see on TV include lines called isobars. Isobars are lines that connect points of equal air pressure. Isobars that form closed circles represent areas of high or low pressure. These areas are usually marked on a map with a capital H or L. Fronts are also labeled on weather maps

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