Types of Weather

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Types of Weather

• By Lenae Roberts

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Rain

• Four types of rain
• Convection
• Relief
• Frontal
• Monsoon
• Convection
• Requires a warm ground and low pressures. It
  causes short answers of sunny periods. The rain
  is caused by rapidly forming Cumulus and
  Cumulonimbus clouds. It tends to occur in the
  later part of the day or early evening Convection
  causes fluffy Cumulus clouds to appear over land.
  
• Relief
• Relief rain is formed when air is forced to cool
  when it rises over relief, features in the
  landscape, such as hills or mountains. Relief
  Rain is characterized by thick clouds with
  drizzly conditions and can occur at any night,
  day or night. The relief ran does not occur over
  flat areas.

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Rain (cont.)

• Frontal
• Frontal Rain is caused when two air masses met.
  When frontal air is formed warm air and cold air
  meet. The warm air is forced over the cold air
  and where the air meets the warm aired is cooled
  and water vapor condenses. Clouds form and
  precipitation occurs.
• Monsoon
• Monsoon Rain is caused by cyclic air movements
  changing with the time of year. Monsoon Rain
  occurs when the land becomes warmer than the sea.
  This causes the air to rise over the land, pass
  out to the sea, descend, then come over the land.
  The rising air will than be over the sea, it will
  condense and rain will fall. Monsoon rains are
  seasonal.

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Clouds
Clouds

• Cumulus
• The cumulus clouds are puffy looking clouds.
  They have flat bottoms and are low in the sky.
  Cumulus clouds usually mean fair weather. If they
  grow tall, they can become thunderheads and bring
  rain.
• Stratus
• Stratus clouds are the low clouds. Fog is a
  stratus cloud at ground level. They look like a
  low gray blanket. Stratus clouds bring rain or
  snow.
• Cirrus
• Cirrus clouds are the highest clouds. They
  usually mean fair weather. They look white and
  feathery.
• Nimbus
• Nimbus clouds are dark rain clouds. They
  usually have a grey color to them.

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Click the cloud!
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Severe Weather

• Tornadoes
• A tornado is a violent rotating column of air
  in contact with the ground. A tornado comes from
  a nimbus cloud.
• Tornadoes can be categorized as being weak,
  strong or violent.
• -Weak tornadoes often have a thin, rope-like
  appearance. These tornadoes only have wind speed
  up to 110 mph.
• -Strong tornadoes often have a more thick
  appearance and are more broad in diameter. Strong
  tornadoes have winds speed from 110 mph up to 200
  mph
• -Violent are very big in sized and cause the
  most damage. The winds of a violent tornado are
  200 mph and higher.

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Severe Weather (cont.)

• Hurricanes
• Hurricanes occur when a type of tropical
  cyclone is accompanied by thunderstorms. With
  this a clockwise circulation of winds( very
  strong winds) hit the earths surface.
• Hurricanes are classified by a Saffir-Simpson
  Hurricane Scale. This machine categorizes the
  strength of the hurricane winds. It categorizes
  from category one hurricanes to category five.
  Category one hurricanes have lower wind speed and
  category five have the strongest wind speed.
• Lightning Storms
• Lightning is a form of electrical discharge
  between clouds and the ground.
• Lightning sometimes appears as jagged streaks
  and a flash in the sky.
• Lightning is one of the most dangerous and most
  accurate severe weather. Cloud-to-ground
  lightning can kill or injure people by direct or
  indirect means. The lightning current can branch
  off to a person from a tree, fence, pole, or
  other tall objects.
• Here is a website that gives safety tips when
  there is lightning.

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Click the sun!
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Sun

• What is the Sun?
• The sun is a hot glowing ball of gas. The suns
  heat and light influence all of the objects in
  the solar system. The sun allows life to exist on
  Earth.
• How does the sun affect the weather?
• The sun is the main source for weather. The suns
  heat regulates the weather the earth has. The
  heat that comes from the sun warms up the air on
  earth.
• With the earth being on an axis, it is tilted
  towards the sun. With this different parts of
  the earth is heated. That is how we get our
  different types of weather and seasons. For
  example
• Summer  The  northern  hemisphere of the earth
  is tilted toward the sun in the summer. The sun
  warms the northern hemisphere.
• Fall/Spring Neither hemisphere is tilted toward
  the sun in fall or spring. The sun is focusing on
  the equator. Neither hemisphere is really hot or
  cold.
• Winter The northern hemisphere is tilted away
  from the sun in the winter. The sun is focusing
  on the southern hemisphere.
•  

This link will show you a picture of how the
Earths heat effects the weather
http//www.usatoday.com/weather/tg/wglobale/wgloba
le.htm