50-06. AIR MASSES AND FRONTS
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1. (Refer to figure 050-08)
Which cross-section of air mass and cloud presentation is applicable to the straight line A-B?
2. Read this description: “After such a fine day, the ring around the moon was a bad sign yesterday evening for the weather today. And, sure enough, it is pouring down outside. The clouds are making an oppressively low ceiling of uniform grey; but at least it has become a little bit warmer.” Which of these weather phenomena is being described?
3. Which of the following conditions are you most likely to encounter when approaching an active warm front at medium to low level?
4. In which air mass are extremely low temperatures encountered?
5. The first clouds are thin, wispy cirrus, followed by sheets of cirrus and cirrostratus, and altostratus. The sun is obscured as the altostratus thickens and drizzle or rain begins to fall. The cloud base is lowering as nimbostratus arrives. These phenomenon is due to a:
