1. By MU Meteorology Students: Philip Bergmaier, Elmer Bauers IV, Katie Nohe, Sarah Miles, & Travis Toth

2.  Main Components of Weather  The Water Cycle  Weather Instruments  Weather Forecasting  Clouds

3. Important Components of Weather Temperature Wind Humidity Air Pressure

4. Temperature  Definition: The measure of how much heat is in the air  Important for “making weather happen”  Measured using a thermometer

5. wcau.nbcweatherplus.com

6. Air Pressure  The measure of how much the air is pushing down on the Earth  Low pressure usually brings stormy weather  High pressure usually brings clear weather  Air pressure is measured with a barometer

7. Wind  Wind is created by air moving from high pressure to low pressure  The 150+ mph winds high in the atmosphere is called the jet stream  The jet stream winds make weather move

8. ww2010.atmos.uiuc.edu

9. Humidity Humidity is how much water or moisture is in the air Humid conditions usually come with rainy weather or hot, steamy days Humidity is measured with a hygrometer

10. www.cls.yale.edu A Picture of a Humid Air Mass

11. The Water Cycle

12. -Evaporation: Liquid to Gas -Condensation: Gas to Liquid -Precipitation: Falls as Liquid or Solid Definition of the Water Cycle: A continuous exchange of moisture between the oceans, the atmosphere, and the land.

14. Evaporation The Sun heats the water from oceans, lakes, and rivers Water to Water Vapor (Liquid to Gas) Air reaches saturation point when it can hold no more water vapor

15. http://www.ssec.wisc.edu/data/g8/latest_g8wv.gif http://www.rap.ucar.edu/weather/satellite/displaySat.php?region=US&isingle=multiple&itype=wv

16. Transpiration Plants can absorb water from the ground Evaporation of water from the leaves and stems of plants Accounts for a small portion of all evaporation in the atmosphere

17. Sublimation Ice to vapor (solid to gas) Acts like evaporation, below freezing

18. Condensation Water Vapor to Water (Gas to Liquid) Water droplets group together to form: –Clouds (Condensation at High Levels) –Fog (Condensation just above Ground Level) –Dew (Condensation at Ground Level above 32F) –Frost (Condensation at Ground Level below 32F or when dew forms before ground freezes)

19. Precipitation Liquid or solid, depending on temperature The condensation that occurs in the upper atmosphere leads to –RainSnow –HailSleet (Falls as snow, melts, and freezes again before hitting the ground as pellets) –Freezing Rain (Snow to Rain to Ice) (Falls as snow, melts, and freezes on impact with the ground)

20. Run Off Some rain or snow is absorbed by plants Remaining snow melts to a liquid and the liquid water runs down to rivers and underground This water eventually travels to a larger body of water The Cycle starts over again

21. Transpiration Run Off Evaporation Condensation Precipitation http://www.btinternet.com/~n.j.f/Y7science/WATER/DragDropWC.htm

22. Clouds

23. Cirrus Clouds www.alanbauer.com 20,000+ feet high Made up of ice crystals Sign of approaching precipitation Shows direction of wind high in the sky

24. www.weatherwizkids.com

25. Stratus Clouds Indicates rainy or dreary weather Essentially fog that does not reach the ground Nimbostratus, stratocumulus, cirrostratus

26. cache.eb.com Fog

27. www.leslietryon.com Cirrostratus Clouds

28. Cumulus Clouds Indicates fair weather 1 mile up or lower May later develop into cumulonimbus clouds Lifetime of 5-40 minutes www.carlwozniak.com

29. www.physorg.com

30. Cumulonimbus Clouds Also known as thunderstorms Can reach 60,000 feet tall The largest types of cumulonimbus clouds are supercell thunderstorms images.encarta.msn.com

31. www.atmosphere.mpg.de

32. www.yorkville.k12.il.us

33. earthobservatory.nasa.gov

34. www.top-wetter.de

35. Mammatus Clouds