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PREDICTION - PREPARATION - PROTECTION
Cyclones are extremely unpredictable, but in most cases, the Bureau of
Meteorology can predict where and when a cyclone will do its worst. Throughout
Australia, the Bureau is responsible for detecting, tracking and issuing
cyclone warnings. You are responsible for ensuring the safety of your
family, yourself and your property.
Prediction
A cyclone can last for days or even weeks. It may stay still, move forward,
move in circles, or even back-track. Whatever it does, the Bureau is tracking
its every move. Scientists and technical staff use radar, satellite, weather
stations and sophisticated computer models to detect and assess cyclone
threat. They analyse the data and communicate information and warnings
to police, State Emergency Service groups and media in threatened areas.
Preparation
People living in tropical coastal regions should always be conscious
of a cyclone threat and be prepared.
Simple measures taken before this time will give you peace of mind
now, rather than panic later
The following table shows you what to expect from different cyclone
categories.
| TROPICAL CYCLONE SEVERITY CATEGORIES |
| Category |
Average Winds
Speed (kmh) |
Strongest
Gust (kmh) |
Central Pressure
(hPa) |
Typical Effects
(indicative only) |
| 1 |
63-90 |
Below 125 |
Over 985 |
Negligible house damage. Damage to
some crops, trees and caravans. Craft may damage moorings. |
| 2 |
90-120 |
125-170 |
985-970 |
Risk of power failure.
Minor house damage. Significant damage to signs, trees, caravans.
Heavy damage to crops. Small craft may break moorings. |
| 3 |
120-160 |
170-225 |
970-945 |
Some roof and structural damage.
Some caravans destroyed. Power failure likely. |
| 4 |
160-200 |
225-280 |
945-920 |
Widespread power
failure likely. Dangerous airborne debris. Significant roofing loss
and structural damage. Many caravans destroyed. |
| 5 |
Over 200 |
Over 280 |
Below 920 |
Extremely dangerous with widespread destruction. |
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