2. Topic: Air Pressure ___ ___

3. The air is made up of molecules.

4. Air molecules have mass.

5. Standard air pressure at sea level = 14.7 lbs/in 2

6. Air pressure is equal in all directions.

7. Cold front came through (more dense), warm grains inside (warm air), crushed silo.

8. TRAIN

9. What happened to the can?

10. _ _ _ Air pressure is:

11. http://cart.clockparts.com/images/W73GBI.jpg

12. http://ww2010.atmos.uiuc.edu/guides/maps/sfcobs/cntr/gifs/wind1.gif

13. High pressure is - Low pressure is -

14. Conversions – page 13 ESRT!

15. Pressure Conversions Millibars Millibars 1040.0 1040.0 973.0 973.0Inches--

16. Pressure Conversions Inches Inches29.4428.70Millibars--

18. Pressure into Station Model Code EX) 1019.6 mb = 196 on station model EX) 1019.6 mb = 196 on station model 196

19. If the number is… - Ex: -

20. -Ex:-

21. Station Model Code into Millibars On the map – upper right hand corner 500 or greater put a 9 in front 499 or less put a 10 in front Remember to add the decimal after the last digit. 196196 196196 19.619.6 19.619.6 1019.6919.6 1019.6919.6 196

22. Check your answer What is possible? 1019.6919.6 Too Low! No good!

23. More Examples What is the pressure in millibars? What is the pressure in millibars? =419419 =419419 41.941.9 1041.9941.9 419 Short Method: if the code is 500 or higher put a 9 in front, otherwise put a 10 Change 996.3 mb onto a station model ---

24. FQ: What is the correct pressure for this weather station? 002= Final Question Final Question