Hurricanes - PowerPoint PPT Presentation

1 / 21
About This Presentation
Title:

Hurricanes

Description:

Hurricane facts. Tropical storms need 50 meters of warm water (26.5 degrees Celcius) to grow ... Storm damage. flooding. Tornado formation. Resources. Gerry ... – PowerPoint PPT presentation

Number of Views:43
Avg rating:3.0/5.0
Slides: 22
Provided by: theinterna
Category:
Tags: hurricanes

less

Transcript and Presenter's Notes

Title: Hurricanes


1
Hurricanes
  • Hurricane
  • North Atlantic Ocean, North East Pacific Ocean
    East of dateline, or South Pacific Ocean East of
    160 E
  • Typhoon
  • NW Pacific Ocean West of dateline

2
(No Transcript)
3
Low pressure at the surface pulls air in
counter-clockwise.High pressure aloft expels the
air in a clockwise direction.
4
Winds are breezy at the edge of the storm and
increase to a maximum in the eyewall. Winds are
relatively light in the eye itself.
5
Hurricane facts
  • Tropical storms need 50 meters of warm water
    (26.5 degrees Celcius) to grow
  • The warm water evaporates into the storm,
    releasing the stored heat energy when it
    condenses
  • The average hurricane uses as much energy in a
    day as the entire US in 6 months
  • Hurricanes help maintain the heat balance of the
    Earth
  • Hurricanes can not be stopped with nuclear
    weapons or cloud seeding
  • Hurricanes move with large currents of air in the
    atmosphere. The direction of the storm is not
    altered by land masses.

6
Hurricane Formation Conditions
  • Water temperature of 26.5 oC
  • 50 m depth of warm water
  • Moist air
  • Calm - very little wind
  • 500 km from the equator so that the Coriolis
    Effect works!

7
(No Transcript)
8
Warm ocean waters of at least 26.5 C Warm, humid
airRelatively moist layers near mid-troposphere
(5 km)Minimum distance of at least 500 km from
equator
9
1 tropical disturbance 2 tropical depression 3
tropical storm 4 hurricane
10
(No Transcript)
11
Wind blows the clouds clockwise start pulling
up ocean water. Then the bottom water moves
counterclockwise
12
Air sinks into the centre (the eye).
13
Wind spins around the eye, where hurricane is the
strongest.
14
As the wind flows higher it becomes weaker and
flows clockwise.
15
(No Transcript)
16
High winds
17
Storm damage
18
flooding
19
Tornado formation
20
(No Transcript)
21
Resources
  • Gerry Bell Hurricanes
  • NOAA
  • NASA
Write a Comment
User Comments (0)
About PowerShow.com