Answer:1. Temperature2. Humidity3. Precipitation4. Wind Speed5. Wind Direction6. Atmospheric Pressure7. Cloud Cover8. Dew Point9. Visibility10. Heat Index11. Wind Chill12. Cold Front13. Warm Front14. Thunderstorm15. Tropical Cyclone16. El Niño17. La Niña18. Barometer19. Meteorologist20. Forecast