Hurricanes and Tornadoes

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Terms in this set (...)

hurricane
A severe tropical cyclone usually with heavy rains and winds moving 119 km per hour.
How do hurricanes form?
They always form when warm moist air rises over tropical waters. They begin as tropical storms with wind speeds of 64-118 km ph.
How long does an hurricane last?
A hurricane can last for over 1 week.
What increases the power of a hurricane?
Evaporation from the seawater increases their power.
What is the center of the storm called?
The eye.
What is the calmest part of a hurricane?
The eye or center. It only has light winds and fair weather
Hurricanes only form over ......
Really warm ocean water of 80°F or warmer.
What is a storm surge?
Unusually high rise in a level of ocean during a hurricane that can create a wall of water.
What causes major flooding in a hurricane?
storm surge.
When does hurricane season start?
The Atlantic hurricane season is from June 1 to November 30, but most hurricanes occur during the fall months.
What is coastal beach erosion?
Coastal beach erosion is the wearing away of land, the removal of beach or dune sediments by wave action, tidal currents, wave currents, or drainage. Waves are generated by storms, wind, or hurricanes and can cause coastal erosion. This may take the form of long-term losses of sediment and rocks, or merely the temporary redistribution of coastal sediments.
Hurricane warning?
An alert that is given at least 24 hours in advance to residents of an area to let them know a hurricane is expected.
Hurricane watch?
An alert that is given 48 hours in advance to residents that lets them know a hurricane is possible.
Tropical storm?
When the winds of a tropical depression begin to blow even faster and thunderstorms move in spiral bands toward the area of lowest air pressure.
Category 1 hurricane?
Hurricane category with winds between 75-95 mph, minimal damage.
Category 2 hurricane?
96-110 mph winds, moderate damage.
Category 3 hurricane?
111-130 mph winds, extensive damage.
Category 4 hurricane?
131-155 mph winds, Extreme damage.
Category 5 hurricane?
155 plus mph winds, Catastrophic damage.
During a hurricane stay away from...
Low-lying and flood prone areas. Always stay indoors during a hurricane, because strong winds will blow things around. Leave mobile homes and to go to a shelter. If your home isn't on higher ground, go to a shelter. If emergency managers say to evacuate, then do so immediately.
4 stages of a hurricane?
Thunderstorm, tropical depression, tropical storm, hurricane.
hurricane/tornado similarities?
Both start from thunderstorms and are dangerous storms.
tornado?
A localized and violently destructive windstorm occurring over land characterized by a funnel-shaped cloud extending toward the ground.
dust devil?
A miniature whirlwind strong enough to whip dust and leaves and litter into the air.
vortex
A powerful circular current of water (usually the resulting of conflicting tides).
Doppler radar?
A radar tracking system that measures how fast the wind is moving.

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