 |
| Previous Image | Next Image |
| Description: Life cycle Frontal surface takes on a wave shape with low pressure centered at the apex of the wave Flow of air is counterclockwise cyclonic circulation Warm front and cold front form Cold front catches up to warm front and produces an occlusion Warm sector is displaced aloft Pressure gradient weakens and fronts discontinue Move eastward across the United States First signs of their approach are in the western sky Require two to four days to pass over a region Largest weather contrasts occur in the spring Changes in weather associated with the passage of a middle-latitude cyclone Warm front Clouds become lower and thicker Light precipitation After the passage of a warm front, winds become more southerly and temperatures warm Changes in weather associated with the passage of a middle-latitude cyclone Cold front Wall of dark clouds Heavy precipitation – hail and occasional tornadoes After the passage of a cold front winds become more northerly, skies clear, and temperatures drop Picture Stats: Views: 381 Filesize: 895.08kB Height: 838 Width: 737 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=39823 |