Time transcripts of 3354_27Storms_full_ipod_lg

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[00:00:16:07]	Narrator: 27 storms are Arlene to

[00:00:20:08]	Zeta. Lets exam what made conditions so 

[00:00:24:10]	favorable for Atlantic storm formation in 2005.

[00:00:28:10]	We begin with the ocean;

[00:00:32:11]	these are sea surface temperatures for the 2005

[00:00:36:12]	hurricane season, changing through time as the calendar advances.

[00:00:40:15]	Warm water powers hurricanes, orange and

[00:00:44:18]	yellow areas, shows zones with water warmer than 82

[00:00:48:20]	degrees; the threshold favorable for hurricane development.

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[00:00:56:25]	Lets start the season again,

[00:01:00:27]	this time adding clouds back into the picture.

[00:01:04:28]	Atlantic-based hurricanes typically form between June

[00:01:08:29]	and November. Hurricanes often start as 

[00:01:12:29]	atmospheric disturbances of the coast of West Africa. Once out 

[00:01:17:00]	into the warm summer waters of the Mid-Atlantic, some ripples 

[00:01:21:04]	begin to rotate and feeding of off warm water strengthen into

[00:01:25:06]	hurricanes. Hurricanes require warm water to heat

[00:01:29:09]	air above the ocean causing a drop in air pressure. Lower

[00:01:33:12]	air pressures sucks more water vapor into the storm, causing

[00:01:37:14]	storms to strengthen. As hurricanes pass over warm water

[00:01:41:16]	they leave trails of relatively cooler water so called,

[00:01:45:17]	cold water trails. Numbers displayed over storms 

[00:01:49:18]	tracks indicate hurricane category changes.

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[00:02:05:26]	Strong shearing winds in the troposphere can disrupt this 

[00:02:09:29]	process weakening young storms, but measurements indicate

[00:02:14:02]	that there was very little shearing wind activity in 2005 to 

[00:02:18:04]	impede storm formation. Hurricanes are rare 

[00:02:22:06]	phenomena; only about 80 or 90 appear worldwide

[00:02:26:08]	every year.

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[00:02:38:11]	Storms

[00:02:42:11]	stalked the Atlantic Ocean and Easter Seaboard from June 

[00:02:46:15]	until early winter in 2005 and the record books are

[00:02:50:17]	groaning under the strain of such a busy year. Consider this list of

[00:02:54:20]	superlatives. An average year produces roughly 10

[00:02:58:21]	storms, 27 named storms formed in 2005.

[00:03:02:22]	An average year produces 6 hurricanes, 

[00:03:06:24]	15 formed in 2005. An average year

[00:03:10:25]	produces two major hurricanes. Seven formed in 

[00:03:14:26]	2005 on average one category 5

[00:03:18:26]	hurricane forms every three years. In 2005

[00:03:22:26]	there were three Katrina, Rita, and Wilma.

[00:03:26:28]	Wilma was the most intense Atlantic hurricane ever recorded,

[00:03:31:01]	Katrina fourth, Rita sixth. But Katrina

[00:03:35:03]	was the most destructive hurricane ever to hit the United States. The

[00:03:39:05]	total losses from storms in 2005 include more than 

[00:03:43:07]	1,200 lives and potentially more than 100

[00:03:47:08]	billion dollars.

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[00:04:03:14]	This visualization shows some of the 

[00:04:07:17]	actual data that NASA and NOAA satellites measured this season.

[00:04:11:20]	Data used to predict the paths and intensities of hurricanes.

[00:04:15:22]	Satellite data play a vital role in helping us 

[00:04:19:24]	understand the land, ocean, and atmosphere systems

[00:04:23:26]	that have such dramatic effects on our lives.

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