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Bob Jones - Earth Science - Chapter 20B
Terms in this set (38)
What are severe disturbances in the atmosohere?
Hurricane, tornado, winter storms, and thunderstorm.
List five main severe storm.
winter storms will
Accompany any kind of freezing or frozen precipitation; wintry mix
Is a macro storm along the upper East Coast of the United States and Atlantic Canada; it gets its name from the direction the wind is coming in from the storm. The wind on land, therefore, will generally blow from the northeast. (Winter storm)
Lake Effect Snow
Is produced during cooler atmospheric conditions Whalen cold air mass moves across long expanses of warmer lake water, warming the lowered layer of air which picks up water vapor from the lake, rises up through the colder air above, freezes and deposited on the leeward (downwind) shores. (Winter storm)
Hard to drive on ice, snow chokes the roads, heavy snow / ice breaks trees, limbs, power lines, roofs of homes, lack of electricity, and frostbite.
List some hazards of winter storms.
Faint stream heading downward, it lasts 50 millionths of a second from cloud to ground.
Lightning discharges that travels up the leader to the cloud.
Lightning bolt that branches out.
Lighting from clouds whose thunder can not be heard.
Each second between flash and thunderstorm equals 1/5th of a mile
} Ex. 15 seconds = 3 miles
Conductors that protect homes from lighting.
1. Get indoors
2. If your outside, go inside a car
3. If your stuck outside
4. Go to an open field and lay down
What should you do if a thunderstorm happens?
1. Do not stand underneath a tree
2. Do not hold metal
What is the worst to do if a thunderstorm happens?
Do not touch the body, call 911 first.
If someone gets hit by lightning what should you do and not do?
2. Updraft - pulls everything upwards
3. Vacuum - sucks everything with them
List some destructive forces of tornadoes.
Fuita Scale F-1
Estimates winds less than 73 mph, light damage, some branches broken of trees, swallow-rooted trees pushed over, signs damage.
Fuita Scale F-2
Estimates winds: 113-157 mph, considerable damage, roofs torn from houses, mobile homes destroyed, boxcars overturned, cars lifted from ground.
Fuita Scale F-3
Estimates winds: 157-206 mph, severe damage.
Fuita Scale F-4
Estimates winds: 207-269 mph, devastating damage, well constructed houses leveled.
Fuita Scale F-5
Estimates winds: 261-318 mph, incredible damage, strong frame houses leveled and swept away.
Storm cellar best / Basement / Northwest wall under a table or bed / Outside find the lowest layer of ground and lay down
Where can you go for predation, from tornadoes?
Called hurricanes in the ___________.
Called cyclones in _________.
Called typhoons in ___________.
Called wollyanillies in _______________.
A group of thunderstorms for 24 hours or more
Winds 38 mph (rotation begins)
Winds 39-73 mph
winds 74 mph or greater
90% of all deaths occur because of drowning from the storm surge.
How much percent of all deaths occur because of drowning from a storm surge?
1. Wind Speed
3. Storm Surge
5. Movement speed
What causes damages by a hurricane?
It is best to evacuate ___________ if you are in a ______________ area.
1. Storm well
2. Heavy winds
3. Heavy precipitin
6. Wave action
5. Storm surge
List some hurricane hazards.
An electrical discharge that occurs either between clouds or between clouds and the ground. Bolts are 1000's meters long on only few centimeters wide. For discharge to jump 1 inch requires 25,000 volts
Lightning is an _______________ discharge.
The _______________, one of the three types of violent storms discussed in this chapter, is most commonly associated with lightning.
The air along the path of a lighting blot expands with an explosive force to produce the sound of ________________.
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