HURRICANES! - PowerPoint PPT Presentation

1 / 57
About This Presentation
Title:

HURRICANES!

Description:

Most form between 5 and 20 degrees N and S latitude. ... They develop most often in the late summer ... doughnut-shaped area of intense cumulonimbus development ... – PowerPoint PPT presentation

Number of Views:198
Avg rating:3.0/5.0
Slides: 58
Provided by: hhs66
Category:

less

Transcript and Presenter's Notes

Title: HURRICANES!


1
HURRICANES!
http//science.pppst.com/tornadoes.html
2
Hurricanes
  • Whirling tropical cyclones that produce winds of
    at least 119 km/hr.
  • Occurrence of Hurricanes
  • Most form between 5 and 20 degrees N and S
    latitude.
  • The North Pacific has the greatest number of
    storms (avg 20/yr)

3
Hurricane Katrina
4
Development of Hurricanes
  • They develop most often in the late summer when
    water temperatures are warm enough to provide the
    necessary heat and moisture to the air.

5
Hurricane Anatomy
  • Eye
  • zone of scattered clouds
  • Calm
  • averaging about 20 kilometers in diameter at the
    center of a hurricane.
  • Eye Wall
  • doughnut-shaped area of intense cumulonimbus
    development
  • very strong winds (surrounds the eye of a
    hurricane)

6
(No Transcript)
7
Anatomy of a Hurricane
Satellite view from above.
8
The Formation of a Hurricane
  • Basic Stages
  • Tropical Depression
  • Winds near the center are constantly between 23
    - 39 mph
  • Tropical Storm
  • Winds between 39-73 mph
  • Hurricane
  • Winds at 74 mph

9
The Steps in Hurricane Formation
  • Warm air above the water rises and cools to form
    clouds.
  • 2. More warm air comes in from all sides to
    replace the air that was rising. (This inward
    wind rotates because of the Coriolis Effect this
    is why hurricanes look like pin-wheels)

3. Hurricanes use energy from the warm ocean
water to grow stronger. As long as it has warm
water a hurricane will continue to grow.
10
Hurricane Intensity
  • The intensity of a hurricane is described using
    the Saffir-Simpson Scale.
  • Storm surge - abnormal rise of the sea along a
    shore as a result of strong winds

11
(No Transcript)
12
How Hurricanes are Named
  • Hurricane History
  • Short distinctive names are quicker and less
    subject to error than using latitude-longitude
  • These advantages are especially important in
    exchanging detailed storm information between
    hundreds of widely scattered stations, coastal
    bases, and ships at sea.
  • Since 1953, storms in the Atlantic have been
    named from lists originated by the National
    Hurricane Center. They are now maintained and
    updated by an international committee of the
    World Meteorological Organization.

13
How Hurricanes are Named
  • The original name lists featured only women's
    names.
  • In 1979, men's names were introduced and they
    alternate with the women's names.
  • The WMO uses six lists in rotation and the same
    lists are reused every six years. The only time a
    new name is added is if a hurricane is very
    deadly or costly. Then the name is retired and a
    new name is chosen. The 2005 list will be used
    again in 2011.

Retired Names
14
Storm Names for 1994-1999
15
Hurricane Katrina
New Orleans
2005
ETUDE
16
Hurricane Katrina
  • It was the first Category 5 hurricane of the 2005
    Atlantic Hurricane Season
  • It was the sixth-strongest Atlantic Hurricane
    ever recorded.
  • The storm weakened to a Category 3 when it made
    landfall along the Central Gulf Coast on August
    29, 2005
  • The storm surge from Katrina caused catastrophic
    damage along the coastlines
  • Leeves in New Orleans were breached by the surge,
    ultimately flooding about 80 of the city.
  • Wind damage was reported well inland, impeding
    relief efforts.
  • Katrina is estimated to be responsible for 75
    billion in damages, making it the costliest
    hurricane in United States history
  • The storm has killed 1,417 people, becoming the
    deadliest U.S. hurricane since the 1928
    Okeechobee Hurricane.

17
The Path of Hurricane Katrina
18
(No Transcript)
19
(No Transcript)
20
(No Transcript)
21
(No Transcript)
22
(No Transcript)
23
(No Transcript)
24
(No Transcript)
25
(No Transcript)
26
(No Transcript)
27
(No Transcript)
28
(No Transcript)
29
(No Transcript)
30
(No Transcript)
31
(No Transcript)
32
(No Transcript)
33
(No Transcript)
34
(No Transcript)
35
(No Transcript)
36
(No Transcript)
37
(No Transcript)
38
(No Transcript)
39
(No Transcript)
40
(No Transcript)
41
(No Transcript)
42
(No Transcript)
43
(No Transcript)
44
(No Transcript)
45
(No Transcript)
46
(No Transcript)
47
(No Transcript)
48
(No Transcript)
49
(No Transcript)
50
(No Transcript)
51
(No Transcript)
52
(No Transcript)
53
(No Transcript)
54
(No Transcript)
55
(No Transcript)
56
(No Transcript)
57
(No Transcript)
Write a Comment
User Comments (0)
About PowerShow.com