Weather

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Weather Climate
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Weather

• Weather is the daily temperature, wind speed,
  humidity
• An air mass is a large area of air with the same
  temperature, density, humidity .
• Fronts are the boundaries between air masses.

Pair share A point out to B where the fronts
meet in the bottom picture.
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Three kinds of fronts

• Stationery Fronts
• Cold warm air meet
• They move side by side along the front
• Warm Fronts mild rain
• Warm air moves slowly up over cold
• Air cools, forms clouds (cirrus, cumulus)
• Later rain clouds are formed.
• Cold Fronts Severe weather
• Cold air moves in quickly under warmer air
• Warmer air is pushed up quickly
• Thunderstorms, maybe tornadoes

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Severe Weather

• Hurricanes
• Begin over warm oceans, in late summer
• Energy is released from condensing clouds
• Extreme low pressure in the eye

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Topography Impacts Weather

• Mountains cause moist air from oceans to rise,
  condense, and precipitate
• On the far side there is a rain shadow ( desert)

Pair share B tell A where you think the rain
shadows are in the US? Hint moist air comes in
from the ocean the green represents mountains.
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Flat Topography

• Flat plains of the Midwest do not stop wind flow
• Tornado alley.

• Tornados Funnels of high-speed wind
• Occur when warm, moist air from Gulf meets cool,
  dry air from Canada

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Why seasons?

• Earths axis is tilted 23.5 degrees
• In winter, the hemisphere tilts away from sun.
• In summer, it tilts towards the sun

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Climate

• Its the average weather of a region
• Sonoma has a Mediterranean climate
• Wet , mild winters and dry summers

Rheinland, Germany
Napa, CA
White board what is the difference between
climate and weather?
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Equatorial climate

• Suns rays hitting the equator are more direct
• Climate is hot and wet year-round

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Arctic Climate

• Cold and Dry year round the sun does not sets
  for 2-3 months of the year and does not rise for
  another 2-3 months.

Ice Hotel, Alaska
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Climate change

• Ice ages have covered most of America in the
  past.
• Age of dinosaurs palm trees in Alaska!
• Climate will continue to change over time.

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Review

• What happens after a cold front moves in?
• What causes the seasons?
• What part of the world has the longest nights?

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Summary

• Main idea
• Important ideas / topics
• key facts
• How the facts relate to the main idea