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Weather Information from the Bureau
of Meteorology
Sydney
Location:
Appin Road, Bulli (North west of Wollongong) (lat
34.26 deg S, long 150.87 deg E)
Type: WSR 74 S Band
Availability (Typical): 24 hours per day.
Interpretation Notes:
The Sydney radar has a very good view in all directions and is the primary
weather radar for the Sydney metropolitan area and Wollongong.
It should provide useful weather information
as far south west as Lake George (Federal Highway between Goulburn and the
ACT), south to Bateman's Bay and north to Lake Macquarie.
There is a tendency to observe areas of false
echoes within approximately 100 kilometres of the radar over the sea.
These are normally easy to recognise because they are usually the lowest
intensity level and randomly scattered with erratic movement from one
radar scan to the next.
True rain echoes normally have a consistent
direction of movement from one scan to the next. Due to its location, this
radar is often unable to detect light showers or drizzle beyond a range of
80 to 100 kilometres. Anyone in Canberra trying to use the radar images
should realise that the radar can only detect precipitation quite high in
the atmosphere in this region.
The radar is, therefore, only of use to
identify the tops of mature thunderstorms and areas of moderate or heavy
rain, which will appear much lighter on the radar display.
There is a small blind spot within a few kilometres of the radar. On the
Sydney 128km range background map, the Warragamba Catchment is outlined in
light brown.
Go
to the Sydney Radar now........
Newcastle
Location:
Lemon Tree Passage (lat 32.730 deg S, long 152.027 deg E)
Type: WSR 74 S Band
Availability (Typical): 24 hours per day.
Interpretation Notes:
The Newcastle radar has a very good view in all directions and is the
primary weather radar for the populated areas around Newcastle and the New
South Wales Central Coast.
It should provide useful weather information
as far north as Port Macquarie, west to Wollemi National Park and South to
Campbelltown. There is a tendency to observe areas of false echoes within
approximately 100 kilometres of the radar over the sea.
These anomalous propagations are easily
identified and are displayed as a mass of low intensity echoes, constantly
changing shape with no apparent direction of movement from one radar scan
to the next.
True rain echoes normally have a consistent
direction of movement. This radar is often unable to detect light showers
or drizzle beyond a range of 100 kilometres. Heavy rain over the radar
site will cause attenuation of all signals.
Path attenuation also occurs when the radar
beam passes through an intense thunderstorm cell; the returned signal from
cells further along that path will be reduced. Apart from these features,
the radar performs well and gives a reasonably accurate representation of
rainfall intensity.
Go
to the Newcastle radar now.....
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Weather
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