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13 Cards in this Set

  • Front
  • Back
these are types of air masses
1. fronts
2. high pressure centers
3. low pressure centers
4. severe weather
characteristics of a warm front
1. warm air advances into a region of colder air
2. warm, LESS DENSE air slides up and over MORE DENSE air
3. long, steady rain over a wide area
4. after it passes, the wind direction changes, temperatures rise, and skies clear
characteristics of an occluded front
1. a fast moving cold front takes over a slow moving warm front
2. produces similar weather as a cold front
3. weather is less severe than weather associated with a cold front
characteristics of a cold front
1. cold air pushes under warm air
2. warm air rises
3. short storms
4. heavy rain
5. wind direction changes
6. skies clear
7. temperatures drop
characteristics of a stationary front
1. where cold and warm air masses meet but neither one advances
2. days of steady rain
3. rain can be heavy
characteristics of high pressure
1. air sinks
2. air will spread out away from the high pressure center as it sinks to the ground
3. coriolis effect turns the air CLOCKWISE
4. air is dry with few clouds
characteristics of low pressure
1. air rises and cools
2. air will reach its dew point, forming clouds and precipitation
3. coriolis effect turns the air COUNTERCLOCKWISE
4. severe weather
severe weather
1. thunderstorms
2. tornadoes
3. hurricanes
1. develop in cumulonimbus clouds
2. will form along a cold front boundary
3. hail, thunder, lightning
1. updraft of air rises
2. air begins to spin and makes a funnel cloud
3. becomes a tornado WHEN IT TOUCHES THE GROUND
how is lightning formed
1. bottom of the storm cloud has a negative charge
2. the ground has a positive charge
3. the two are attracted to each other (opposites attract)
4. lightning is formed
what is the sound we hear when we see lightning
1. called thunder
2. the sound is due to the expansion and contraction of air
1. begins as area of low pressure over warm water
2. coriolis effect makes the wind turn COUNTERCLOCKWISE
3. contains updrafts and downdrafts
4. the downdraft prevents clouds and is called THE EYE OF THE STORM