Study Questions:

1.  What is the name of the observer's handbook?

2.  How is the observation wind defined?

3.  What are the requirements for a variable wind?

4.  When did gusty winds have to take place to be reported?

5.  What is a wind shift?

6.  How fast must the wind speed be to be reported as a "peak"?

7.  How long does an automated observing platform have to work to create the surface visibility?

8. What is a squall?

9.  When a thunderstorm has an intensity what is it refering to?

10.  What is a thunderstorm? 

11.  What is the definition of "vicinity" and "distant" thunderstorms?

12.  Can a thunderstorm be reported without precipitation?

13.  When does a thunderstorm begin?

14.  When does a thunderstorm officially end?

15.  How many minutes must seperate thunderstorms in order to have multiple events at the airport?

16.  What is the definition of "pressure falling rapidly"?

17.  Which of the automated observing systems can report a thunderstorm?

18.  What is the difference between augmentation levels A, B, C, and D for an ASOS?

19.  What is a CB?

20.  What is +TSRA refer to?

21.  What are the codes for lightning?

22. What are the codes for pressure rapidly falling?

23.  What does AUTO mean?

24.  What conditions force a new observation to be made and hense change the ATIS?

25.  What does TEMPO refer to?

26.  What does PROB 40 mean?

27.  What are some of the products of the domestic AWC division?

28.  What is a severe thunderstorm according to the NWS?

29.  How long are SIGMETs valid?

30.  What hazards does a convective SIGMET imply?

31.  What is an embedded thunderstorm?

32.  If a convective SIGMET message is negative, does that mean there are NO thunderstorms?