Weather

1
Weather Climate

• Storms

2
Objectives

• List and describe the main types of storms and
  explain how they form
• CC STATEMENT (CC 2.1.7) Global patterns of
  atmospheric movement influence local weather.

3
STORMS

• A storm is a violent disturbance in the
  atmosphere.
• They involve sudden changes in air pressure.
• Changes in air pressure causes rapid air movement.

4
Thunderstorms
5
Thunderstorms

• During a thunderstorm, positive and negative
  electrical charges build up in the clouds.
• The discharge of the electricity between clouds
  is lightening.
• Lightening is as hot as 30,000C, hotter than the
  sun.
• The heated air expands and explodes producing
  thunder.

6
Checkpoint

• What is El Nino?
• What is a storm?

• Weather pattern related to the temperature of the
  water in the tropical Pacific Ocean.
• Any type of violent disturbance in the atmosphere.

7
Tornado

• Rapidly whirling, funneled-shaped cloud that
  reaches down from a storm cloud to touch Es
  surface
• Most frightening disruptive storm
• Usually brief, touching the ground approx. 15
  minutes or less
• Wind speeds may reach 480 km/hr

8
Tornado
9
Tornado

• Tornado Watch tornadoes are possibly in your
  area
• Tornado Warning tornadoes have been seen in the
  sky or on weather radar
• Occur most often in the US
• Approx. 800 tornadoes a year

10
Checkpoint

• Where do tornadoes form?
• Why is there a tornado valley?
• What states make up tornado valley?

• Low heavy cumulonimbus clouds
• Warm humid air mass moves north from Gulf of
  Mexico and meets a cold dry mass that is moving
  south from Canada
• SD, Iowa, Nebraska, Kansas, Missouri, Oklahoma,
  TX, NM, and Arkansas

11
Hurricanes

• Tropical storm that has winds of 119 km/hr
• Usually occur between June and November in the
  eastern US
• Hurricanes that occur in western US are called
  typhoons
• Bring much needed rainfall to S Asia SE Asia

12
Hurricanes
13
Hurricanes

• Occur between June and November
• Effect people that live on the coast of the
  Atlantic, Pacific, and Indian Oceans
• Hurricanes bring needed rainfall to S Asia and SE
  Asia
• Eye center of a hurricane

14
Winter Storms

• Lake-effect Snow In the fall and winter, land
  cools faster than the lakes.
• When cool air mass moves from Canada across Great
  Lakes it picks up water vapor and heat from
  lakes.
• After the air mass
• passes the lakes it begins
• to cool and the water vapor
• condenses and falls as snow

15
HOMEWORK

• Section Review p. 91 1-4 COMPLETE SENTENCES
• Be able to explain the CC statement that relates
  to todays lesson
• BRING WORKBOOKS TO CLASS TOMORROW