Bureau of Meteorology: Tropical Cyclone Advices (Warning & Watch)
Introduction
Tropical Cyclone Advices are issued whenever a tropical cyclone is expected
to cause winds in excess of 62km/h (gale force) over land in Australia*.
A tropical cyclone advice may be a watch and/or a warning, depending on
when and where the gales are expected to develop.
When is a Tropical Cyclone Advice Issued?
- A tropical cyclone watch is issued for coastal communities when the onset
of gales is expected within 48 hours, but not within 24 hours.
- A tropical cyclone warning is issued for coastal communities when the onset
of gales is expected within 24 hours, or are already occurring
Each advice issued for a particular cyclone will be numbered sequentially,
starting at number 1 for the first advice. A tropical cyclone advice
may contain a combined watch and warning, that is it will provide information
on the area under watch status and the area under warning status
How often is a Tropical Cyclone Advice issued?
While the threat remains, a tropical cyclone advice will be issued every
six hours, increasing to every three hours when cyclone warnings are required.
In some circumstances, when a cyclone approaching the coast is under radar
surveillance, the advices may be issued hourly.
What information is included in the Tropical Cyclone Advice?
Each Tropical Cyclone Advice will consist of the following information:
- The area covered by a cyclone watch and area covered by a cyclone warning
- The cyclone name
- The intensity
category of the cyclone (1-weak to 5-strong)
- The latest observed location of the cyclone centre
- The central pressure of the cyclone (warning only)
- The distance of the cyclone to significant locations
- The expected or recent movement of the cyclone
- Range of destructive winds
- Maximum wind gusts
- Advisory statements on actions to be taken to mitigate the effects of
the cyclone (note this is issued separately for the NT and Kimberley)
- The issue time for the next warning
Usually, each advice will have an associated threat map issued.
Who is the target audience of Tropical Cyclone Advices?
All land based communities in the threat zone.
Note that separate marine warnings will be issued, and all mariners
should refer to these warnings for relevant information.
Where are Tropical Cyclone Advices Issued?
Tropical Cyclone Advices are issued by Regional Offices of the Bureau
of Meteorology in Brisbane, Darwin or Perth, depending on the location
of the cyclone:
 Click on image for full size.
Note that Perth will also issue tropical cyclone advices for Cocos and Christmas Islands.
Sample Product
Tropical Cyclone Advice: (Watch and/or Warning)
Other Tropical Cyclone Products
Tropical Cyclone
Seasonal Outlook (Provided in October)
Tropical Cyclone Outlook
(Provided daily during the season)
Tropical Cyclone Information
Bulletins (Issued for existing cyclones not expected to affect the coast
within 48 hours)
Tropical Cyclone Technical Summary
Tropical Cyclone Forecast Track Map
Education Material
Return to Main Warnings Information
Page
* If a cyclone is expected to
affect the east coast of Queensland, but not cross the coast, a watch or
warning will only be issued if winds over land are expected to exceed 75km/h
Last updated November 2006
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