1. Clouds, fronts, and weather maps
S4E3 Investigate different forms of precipitation and sky conditions
S4E4 a. Identify weather instruments and explain how each is used in gathering weather data and making forecasts
b. Using a weather map identify fronts, temperature, and precipitation and use the information to interpret the weather conditions

2. Cumulus Cloud
Cumulus clouds are white and puffy. They are associated with fair weather.

3. Nimbus Cloud
Nimbus clouds are dark and produce precipitation
Cumulonimbus clouds are associated with heavy rain, snow, hail, lightning and even tornadoes.

4. Stratus Cloud
Stratus clouds form flat layers that often cover the sky. Fog, light to moderate rain and sometimes snow falls from these clouds.

5. Cirrus Cloud
Cirrus clouds form high in the atmosphere and are made mostly of ice crystals. They are associated with fair, pleasant weather. .

6. Cloud Patterns What type of weather is associated with cumulus clouds?
What type of weather is associated with stratus clouds?
What type of weather is associated with cumulonimbus clouds?
What type of weather instruments are used to determine cloud patterns?

7. Warm Front
A warm front forms where a warm air mass moves over a cold air mass and brings light, steady rain or snow

8. Cold Front
A cold front forms where a cold air mass moves under a warm air mass. The warm air is pushed up and suddenly cooled. This causes condensation, heavy rain, thunderstorms, and snow.

9. Clouds and Fronts
What types of clouds are associated with warm fronts?
What types of precipitation are associated with warm fronts?
What types of clouds are associated with cold fronts?
What types of precipitation are associated with cold fronts?

10. Air Mass
An air mass is a large body of air that has the same temperature and humidity throughout

11. Warm and cold air masses
Remember warm air usually holds more water vapor than cold air and the molecules are farther apart. It is usually associated with low air pressure.
Cold air usually holds less
water vapor than warm
air and the molecules
are closer together. It is
usually associated with high
air pressure.

12. Air Mass What is an air mass?
Warm air usually holds ____________ moisture than cold air.
Warm air is usually associated with ________ air pressure.
Cold air is usually associated with _________ air pressure.

13. Fronts
A front is a place where two air masses meet. Sometimes you can locate a front by watching the clouds.
A warm front brings light, steady rain or snow.
A cold front may bring heavy rain, thunderstorms, and snow.

14. Weather Maps - Fronts
Weather maps use symbols to show the weather. Fronts are shown on weather maps.
The symbol for a warm front is a
red line with half circles on the side
of the direction the front is moving.
A blue line with triangles shows a cold front.

15. Weather Maps - Temperature
Another kind of information given on a weather map is temperature. Temperatures may be written on a map or shown with colors. The map key explains what the symbols mean.

16. Weather Maps – Air Pressure Systems
High- and low-pressure systems may be indicated on a weather map as well.
A high-pressure system is symbolized by an H. High-pressure systems form where an area of cool, dense air is surrounded on all sides by lower-pressure air.
A low-pressure system is symbolized on a weather map by an L. Low-pressure systems form where an area of warm, light air is surrounded by higher-pressure air.

17. Weather Maps – Current SE Weather

18. Weather Map – Current Southeast temperature

19. Make a weather map Include this information in your weather map:
High or low pressure systems
Warm or cold fronts
Temperature
Use the drawing tools in Nearpod

20. Add weather symbols to this map