1. Weather Maps and Symbols Science 1206

2. Lesson Objectives to understand how meteorological data is collected and how the data is used to predict future weather conditions. to locate weather symbols typically used on weather maps which indicate the following weather conditions: high pressure region (indicated by H); low pressure region (indicated by L), wind direction and speed and type of cloud cover, air temperature (°C); visibility (the distance x100m that one can see); weather condition (may include rain, freezing rain, snow, thunderstorm, fog, haze, or dew); dew point (temperature at which moisture will condense on objects); type of low, middle, and high cloud cover and isobars (lines representing regions with the same atmospheric pressure).

3. Predicting Future Weather Conditions Have you ever noticed how certain people who work closely with the sea or land (fishing, logging, and farming) tend to be able to forecast the weather without the use of instruments. As technology advanced, people have been collecting weather data using simple instruments to quantify measurements of temperature, atmospheric pressure, relative humidity, wind direction and speed.

4. The Weather Forecast The Weather Forecast The study of weather and forecasting is called meteorology. The people who study the weather and try to predict future trends are called meteorologists. http://www.on.ec.gc.ca/greatlakeskids/glk-video-e.html

5. Weather Map

6. Weather on the Web http://weatheroffice.ec.gc.ca/jet_stream/in dex_e.html http://weatheroffice.ec.gc.ca/jet_stream/in dex_e.html http://www.weathernetwork.com/weather/ maps/floods.htm?temp http://www.weathernetwork.com/weather/ maps/floods.htm?temp

7. Professional Meteorological Weather Map

8. Activity Read "Interpreting and Creating Weather Maps" on Pages 683-685. Using the map provided, compile a listing of symbols located on the map and identify the meaning of each. Your list of symbols should include the following: high pressure region (indicated by H) low pressure region (indicated by L) wind direction and speed and type of cloud cover air temperature (°C) visibility (the distance x100m that one can see) weather condition (may include rain, freezing rain, snow, thunderstorm, fog, haze, or dew) dew point (temperature at which moisture will condense on objects) type of low, middle, and high cloud cover isobars (lines representing regions with the same atmospheric pressure) Select one area of the weather map and describe the weather conditions in that locality. Write a complete report of your findings in your portfolio.

9. Which symbol on a weather map indicates a region of high pressure? a. L b. S c. H d. 860 Answer: C

10. Cloud cover is indicate by a circle. What does the following cloud cover symbol mean? a. obscured sky b. cloudy sky c. partly cloudy sky d. scattered clouds Answer : B

11. What type of cloud is indicated by the following cloud symbol? a. cirrus b. cirrostratus c. cumulus d. cirrocumulus Answer : A

12. What type of weather condition is indicated by the following symbol? What type of weather condition is indicated by the following symbol? a. rain b. fog c. snow d. haze Answer : C

13. What type of weather condition is represented by the following symbol? a. rain b. tornado c. windy d. thunderstorm Answer: D

14. Which symbol refers to an increase in barometric pressure? a. L b. H c. +0.6 d. 101.5 Answer: C