Post on 13-Dec-2015
Objective
You will learn the characteristics of storms, in
order to identify the various
types of storms.
Warm-up
What comes to mind when
you hear the term severe
weather?
Most Recognizable
What is a Severe Storm?
Most violent weather is associated with LOW pressure systems because air of
different properties mixed there
Thunderstorms Hurricanes
Winter StormsTornadoes
Thunder & Lightning
Superheated air expands and creates shock wave
Can be heard up to 30 miles away
Flash-Sound Interval: 5 sec/mi (3 sec/km)
Not one second = one mile“Heat Lightning” is ordinary
lightning illuminating the clouds
Warm, humid, air rising in unstable environment
Tornadoes!Violent, whirling wind that moves in a narrow
path over land
Fun Facts: 1. The most powerful Tornadoes occur in the United States.2. A typical tornado only lasts for a few minutes.3. Every tornado has its own color, sound and shape.4. You need to step on the pedal of a car pass 70 miles per hour
to outrun the fastest tornadoes.5. The chances that a tornado is a F5, the highest classification
for a tornado on the F-scale, is less than 0.1% (this just occurred!)
6. Tornadoes have been reported in every state in the US and also in every season.
HurricanesHurricane: Atlantic
and East PacificTyphoon: West PacificCyclone: Indian Ocean
Intense Low-Pressure Systems
Need 60 m (200 feet) of ocean water at 26.5 C or warmer to formWinds of at least 119
km/hour
BlizzardA winter storm with strong winds, cold
temperatures, and low visibility, that lasts more
than three hours
• A National Weather Service WATCH means conditions are favorable for severe weather to develop
• A WARNING means that severe weather conditions already exist
• Where are most of the glitter and beads?• Where is the movement of the glitter and
beads the fastest? Where is it the slowest?• How is the vortex model like a real tornado?
How is it like a hurricane?
Vortex Demo
Reflect
• What happened when you first held the model so that the water was in the top of the bottle? Why do you think this happened? Draw a picture of your results
• How did you get the water to flow quickly into the bottom bottle?
• How did the motion of the glitter and beads change as they moved closer to the center of the spiral?
• Think about your model as a tornado. What might the glitter and beads represent? What does their movement tell you about the movement of air within a rotating storm?
• Think about your model as a hurricane. What do you think causes clouds of a hurricane to spiral?
Test Day
• Take out your Blue Packet, Dictionary, and other Meteorology notes
Word Bank 44-55
• Air Pressure• Front• Temperature• Wind• Humidity• Clouds
• Dew point• Cirro• Stratus• Precipitation • Tornadoes• Full of Water
Closure
• Look at the 3 pictures: Identify the storms. What clues helped you classify each storm?, List the specific characteristics that led to the identification.