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Violent Weather

Violent Weather. Copy. Under what conditions do tornadoes, thunderstorms and hurricanes form?. Watch this!. Copy. Reasons for an unstable air mass. Air is considered unstable if it continues to rise or sink when given a nudge.

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Violent Weather

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  1. Violent Weather Copy. Under what conditions do tornadoes, thunderstorms and hurricanes form?

  2. Watch this!

  3. Copy.

  4. Reasons for an unstable air mass • Air is considered unstable if it continues to rise or sink when given a nudge. • An unstable air mass is characterized by warm moist air near the surface and cold air aloft. As it rises, it creates a cumulonimbus cloud or thunderhead. • Thunderstorms are most often associated with a cold front.

  5. Thunderstorms • Copy this onto your chart: • Are associated with cold fronts • Rotate counterclockwise BrainPop thunderstorms • Don’t copy. Think. Do cumulonimbus clouds always create thunderstorms?

  6. Tornadoes • Copy onto chart. • Rotate counterclockwise (anticyclonic) • Column of air descends from thunder- storm • Low pressure storm over land • BrainPop tornadoes Do thunderstorms always create tornadoes?

  7. Hurricanes • Copy onto chart. • Low pressure tropical storm • Anticyclonic winds • Forms over ocean waters • BrainPop hurricanes What type of air mass helps to bring hurricanes to SC?

  8. Wrap-Up Using your notes, summarize how these violent weather events are alike and different.

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