Transcript Chapter 3 Section 1

STORMS
OBJECTIVE: List and describe fronts and storms
And explain how they form.
OBJECTIVE: Describe measures for storm safety
1. El Nino: A weather pattern related to the temperature of the
Water in the tropical Pacific Ocean – influences weather half a
World away.
2. Storm: A violent disturbance in the atmosphere – Involves
Sudden changes in air pressure.
3. Thunderstorms form within large cumulonimbus clouds – or
Thunderheads.
4. Lightning: A sudden spark or electrical discharge, as charges
Jump between parts of a cloud or between the cloud and the
Ground.
5. Thunder: The explosion of the rapidly heated air (around a bolt
Of lightning ) that suddenly expands the air.
6. THUNDERSTORM SAFETY:
•Avoid touching metal objects because they can conduct
Electricity from lightning into your body.
*Lightning Rods: Put on the highest point of a roof – If
Lightning strikes that building the electrical energy will go
Through cables into the ground and prevent fires in the
Building.
*Avoid open spaces (Soccer fields, Golf Courses, Etc.)
*Do not hide under a tree
*Get away from water (like a lake or stream)
7. Tornado: A rapidly whirling, funnel-shaped cloud that reaches
Down from a storm cloud to touch Earth’s surface.
8. Tornades in the ocean = Water spouts
9. Tornadoes develop in low heavy cumulonumbus clouds – The
Same clouds that bring Thunderstorms.
10. Tornado Safety:
*Tornado Watch: Tornadoes are possible
*Tornado Warning: Tornado has been seen in the sky or on the
Radar – Take cover immediately
*The safest place to be during a tornado is the basement of
A well built building.
11. Hurricanes – A tropical storm that has winds of 119 kph or
Higher. It is about 600 km across. They form in the Pacific,
Indian, and Atlantic Oceans and the Gulf of Mexico.
12. A hurricane begins over warm water as a low pressure area,
Or tropical disturbance.
13. The eye of the Hurricane: The center. A ring of clouds
Surrounds the eye where temperatures are warmest and wind is
Calm.
14. Hurricanes last a week or more. When they move over water
They gain energy - when they move over land they lose energy.
15. Storm Surge: The low pressure and high winds of the
Hurricane over the ocean raise the level of the water up to 6m
Above normal sea level. The result is a “dome of water” that
Sweeps across the coast where the hurricane lands.
16. Hurricane safety:
*Hurricane watch: Possible hurricane in 36 hours. Get ready for
Evacuation.
*Hurricane Warning: 24 hours before hurricane lands – Leave
Immediately!
17. Winter Storms: Snow Storms
*Snow falls when humid air cools to below 0*C.
18. Lake-Effect Snow: Land near lakes cools much faster than
The lake. Air above the lake is warmer and more humid so when
It blows toward the cool land if falls as snow.
19. Snowstorm Safety:
*Blowing snow makes it easy to get lost & cold temps. Cool the
Body rapidly. Keep your body covered if outdoors.
*If you are caught in a snowstorm, find shelter from the wind.