2. What is Weather? Local Weather Investigation 1: Part 2

3. Weather Report Write a description of the current weather What type of information did you include?

4. Professional Reports Temperature Pressure Humidity Visibility Wind Speed Direction Forecast Cloud conditions

5. Your Description Your descriptions probably: –Were more descriptive. –Did not include actual measurements.

6. Weather Vocabulary (Add definitions to your Interactive Notebook.) Temperature - how hot or cold the air is Humidity - the amount of water vapor in the air Wind direction - the compass direction from which the wind is coming Wind speed - how fast the air is moving past a measuring point

7. Weather Vocabulary Pressure - the force of the air pushing in all directions Visibility - the distance one can see through the air

8. Thermometer - measures temperature Barometer - measures air pressure Anemometer - measures wind speed Wind vane - measures wind direction Hygrometer - measures humidity

9. Visibility How far you can see Weather factors might limit visibility? –Fog, clouds, haze, smog, rain, snow, dust Determine visibility? –View distant landmarks

10. Units for Measurements Temperature - degrees Celsius ˚C or F Pressure - millibars (mb) Humidity - percent % Wind speed - mph or km/h Wind direction - the direction from which the wind is coming (N, S, E, W)