22 terms

Hurricane formation, features and safety measures


Terms in this set (...)

Tropical disturbance
1st stage of hurricane formation. A cluster of thunderstorms over water with winds less than 24 miles per hour.
Tropical depression
2nd stage of hurricane formation. Thunderstorm over water with little rotation, rain, and wind speeds between 25 and 39 mph.
Tropical storm
3rd stage of hurricane formation. Storm over water with distinct rotation, heavy rain, and wind speeds between 40 and 74 miles per hour.
4th stage of hurricane formation. A rotating tropical storm with heavy rain and winds of 74 miles per hour or higher.
the center of a hurricane where there is no rain or wind
Eye wall
The strongest winds of a hurricane surrounding the eye
Feeder bands
spirialing lines of thunderstorms which extend outward from a hurricane's center
Saffir-Simpson Scale
chart showing descriptions of the 5 categories of hurricanes, their wind speeds, and the amount of damage each can cause
Hurricane watch
hurricane conditions are expected in an area in 48 hours
Hurricane warning
hurricane conditions are expected in an area in 36 hours
Storm surge
a wall of water that moves ashore when a hurricane strikes land
Atlantic Ocean hurricane season
June 1 through November 30
The time of year when conditions are favorable for hurricane formation.
the act of moving people out of danger
Voluntary evacuation
given when leaving an area about to be affected by a hurricane would be best, but you can stay if you want
Mandatory evacuation
given when you HAVE to leave an area about to be affected by a hurricane, whether you want to or not
Hurricane evacuation route
designated highways used to help people leave an area about to be affected by a hurricane
The basic facilities that are necessary for an area to function like electricity, water, gas, and roads and bridges
Sea surface temperatures
This is the temperature of the water at, or close to the surface of the sea / ocean. For a hurricane to form this must be 26 degrees Celsius or higher.
Coriolis effect
The rotation of the Earth that makes hurricanes rotate clockwise in the Southern hemisphere and counterclockwise in the Northern Hemisphere.
Minimum sustained wind speed
74 mph
Hurricane latitude
8-20 degrees N / S of the equator
Hurricane diameter
Up to 800km

Flickr Creative Commons Images

Some images used in this set are licensed under the Creative Commons through Flickr.com.
Click to see the original works with their full license.