Unit 3 Lesson 4

Unit 3 Lesson 4 How Do Weather Patterns Help Us

Predict Weather?

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Unit 3 Lesson 4 How Do Weather Patterns Help Us Predict Weather?

Florida Benchmarks

• SC.5.E.7.3

Recognize how air temperature, barometric pressure, humidity, wind speed and direction, and precipitation determine the weather in a particular place and time.

• SC.5.E.7.7

Design a family preparedness plan for natural disasters and identify reasons for having such a plan.



Windy Weather

• Air is made of matter. It has mass and volume.

• Air pressure is the weight of the atmosphere on

Earth’s surface.

• The sun does not heat all parts of Earth evenly.

This causes changes in air pressure.



Windy Weather

• Wind is moving air.

• Differences in air pressure cause the air to move.

• Wind blows from areas of high pressure to areas of low pressure.



Local Winds

• Land heats up more quickly than water does during the day.

• A sea breeze forms during the day when warm air over land rises and cool air over water moves inland to replace it.



Local Winds

• Land loses heat faster than water at night.

• A land breeze forms when cool air over land moves out to sea to replace the warm air rising from the water.



Windy Weather

• Use the image below to describe how temperature affects air pressure.

• How does temperature affect the density of air?



Battling Bodies of Air

• An air mass is a large body of air that has the same temperature and moisture properties throughout.

• An air mass that forms over warm land will be warm and dry.

• An air mass that forms over cold water will be cold and wet.




• The boundary where two different air masses meet is called a front .

• A cold front forms where a cold air mass moves under a warm air mass.

• A warm front forms where a warm air mass moves over a cold air mass.




• Describe what is happening in the diagram.




• Describe what is happening in the diagram.



Mapping the Weather

• A weather map is a map that uses symbols to show weather data.

• Different symbols show warm fronts and cold fronts.



Mapping the Weather

• Describe the weather in three places.



Mapping the Weather

• Meteorologists get data from weather tools located at weather stations.

• A weather station is a structure that has tools for measuring and recording weather data at a given location.

• Satellites and Doppler weather radar are also used to gather weather data.


Answer the following in complete sentences:

 1. What weather data do meteorologist collect?



 2. What do meteorologist do with this data?





 3.What methods do meteorologist use to make accurate weather forecast?



 4. Why do you think it might be important to track the weather over the oceans?


When Disaster Strikes

• Tornadoes, hurricanes, and blizzards are types of severe weather.

• A tornado has a funnel shape and can form from violent thunderstorms.

• A hurricane is a strong low-pressure storm that forms over warm water.




• A blizzard is a strong winter storm with high winds and heavy snowfall.

• Preparedness plans help people stay safe when disaster strikes.




• You should try to be indoors for severe weather.

• Prepare an emergency kit with water, food, and a first-aid kit.

• Listen to the radio for storm warnings.


Unit 3 Lesson 4

Local Winds

Local Winds

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Unit 3 Lesson 4

Local Winds

Local Winds

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