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Transcript of Hurricanes
What Is A Hurricane?
How are they dangerous?
A hurricane is an intense tropical storm with powerful winds and very heavy rain. A hurricane requires wind speeds at at least 74 miles per hour. A hurricane is measured with the Saffir Simpson Scale, which is divided into five categories.
More than 50% of hurricanes create tornadoes.
Storm Surge: the rising surge could lead to severe coastal flooding.
High Winds: Winds can vary from 74 to 155 miles per hour, turning anything loose into deadly projectiles
Inland flooding: associated storms can flood area hundreds of miles away from the coast; causes 60% of hurricane related deaths
How do they Form?
Hurricanes are formed over really warm ocean water. Hurricane start when thunderstorm clouds drift over tropical ocean water which is a temperature of 80°. When the air above the sea warms up it absorbs moisture and rises. As it rises it cools and the moisture turns to liquid this releases heat energy. Hot air still continues to rise and move higher and higher and faster and faster. Then it starts to whirl causing a hurricane.
How They Are Measured/ Recorded
Hurricanes are measured through the Saffir Simpson Scale, which has five categories:
Category 1: 74-95 mph winds; some damage with 4-5 feet of storm surge
Category 2: 96-110 mph winds; extensive damage with 6-8 feet of storm surge
Category 3: 111-130 mph winds; devastating damage with 9-12 feet of storm surge
Category 4: 131-155 mph winds; catastrophic damage with 13-18 feet of storm surge
Category 5: 155 mph winds or more; catastrophic damage with at least 18 feet of storm surge
The categories depend on the speed of the winds and the damage.
By Delaney Kazawic, Jack Zaffarese, and Mathew Moehringer
Occurred: September 11, 1961
Location: Texas (remnants tracked near Chicago)
Category 4 at landfall
Damage: $408 million
Dumped about 4 inches of rain in Milwaukee September 12-13
Date: June 19-22, 1972
Location: Florida panhandle/northeast U.S.
Category 1 at landfall
Damage: $2.1 billion
Most deaths were due to catastrophic flooding in New York and Pennsylvania
Date: August 31, 1954
Location: Long Island, New York/New England States
Category 3 at Landfall
Damage: $460 million
Key Terms and How To Prepare
Hurricane- An intense tropical storm with powerful winds and lots of rain
Storm Surge- a dome of water that sweeps across the coast when the hurricane makes landfall:can be up to 6 meters (20 feet high)
Eye wall-narrow bands of wind and clouds around the center of the storm; considered the most deadly part of a hurricane
Eye-considered the center of the storm; calmest part of hurricane
How To Prepare
Eye Wall vs. Eye
The Eye Wall is a narrow band of winds and clouds around the center of the storm
Eye Wall is considered deadliest part of hurricane
Produces deadly winds more than 150 mph
Very dangerous area
The most intense rain and winds occur here
Eye wall is literally a vertical wall around the eye
Before a Hurricane
During a Hurricane
After a Hurricane
Considered the center of the storm
After passing through the eye of the storm the storm will resume, but the winds will blow in the OPPOSITE direction
Most safe and relaxed part of the storm
Surrounded by a deadly vertical wall of clouds called the Eye Wall
Fun Facts and Sources
Know your surroundings
Cover all of your home's windows
Be sure trees are trimmed to be wind proof
Reinforce your garage doors; if wind enters your garage, it can cause expensive damage
Bring in outdoor furniture, garbage cans and anything that is not strapped down
The word "hurricane" comes from the Taino Native American word
which means "evil spirit of the wind"
The first time anyone flew into a hurricane happened in 1943 in the middle of World War II
Every second, a large hurricane releases the power of about 10 atomic bombs!
Slow-moving hurricanes produce more rainfall and can cause more damage from flooding than fast-moving hurricanes
In the Pacific Ocean, hurricanes are called typhoons. In the Indian Ocean, they are called tropical cyclones.
Stay out of any building if you smell gas, flood waters remain around the building or your home was damaged by fire and the authorities have not declared it safe.
Avoid using your phone, except during serious emergencies.
Listen to the television or radio for more information.
Turn off propane tanks.
Ensure a supply of water for purposes such as cleaning and flushing the toilets.
Wear protective clothing and be cautious when cleaning up to avoid injury
Check refrigerated food for spoilage. If in doubt, throw it out.
If you evacuated, return home only when officials say it is safe
Inspect your home for damage. Take pictures of damage, both of the building and its contents, for insurance purposes. If you have any doubts about safety, have your residence inspected by a qualified building inspector or structural engineer before entering.
"Hurricane Facts, Hurricane Information, Hurricane Videos, Hurricane Photos - National Geographic." National Geographic. N.p., n.d. Web. 27 Feb. 2015.
"National Hurricane Center." National Hurricane Center. N.p., n.d. Web. 18 Mar. 2015.
N.p., n.d. Web.
"Storms/hurricane." The Weather Channel. N.p., n.d. Web. 18 Mar. 2015.
"Weather Wiz Kids Weather Information for Kids." Weather Wiz Kids Weather Information for Kids. N.p., n.d. Web. 17 Mar. 2015.
Warm humid air from tropical areas rises. As the air rises, it cools down, and the moisture in the air condenses to cloud and rain drops. The heat energy releases in the condensation process. Storms in the tropics usually occur in late summer and fall. The oceans in the Northern Hemisphere are the warmest. When a hurricane lands, it loses its tropical moisture, and that is the fuel that starts the storm. They weaken rapidly over land, due to the quick loss of water.
Get Caught in a Hurricane