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Sunday Island Rain Radar

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About the Sunday Island Rain Radar

Broome Meteorological Office

Geographical Situation Broome Weather Watch Radar is situated so that it overlooks Roebuck Bay to the south-east and the wider Indian Ocean (north to south-west). The radar has an 360 degree unrestricted view. Meteorological Aspects On the 27th of October 2008 the Bureau installed a C-Band radar at Broome airport, replacing the existing WF 44 radar. The introduction of this new more sensitive radar has led to a number of occasions where "false" or anomalous echoes have been displayed. This is not caused by a malfunction in the radar, but rather is a result in the increased sensitivity of the radar. Radar works by sending pulses of electromagnetic energy (in the form of waves), which are then reflected back to the radar by objects in the path of the wave . The radar beam follows a slightly curved path and goes progressively higher the further away from the radar it travels , until it hits an object in its path usually rain droplets. In the Broome area it is quite common for strong temperature inversions to occur, which means the temperature actually increases with height over a small distance in the atmosphere instead of steadily decreasing with height. There are a number of reasons why inversions can happen, and in the Broome area, one of the most common examples is when hot air from the inland moves out over the cooler ocean. This leads to marked temperature inversions close to the surface, and the effect of this inversion is to "trap" the radar beam in the layer of air between the cool ocean and the hot air a couple of hundred metres above it. Because of the change in the refractive index between hot and cool air, the radar beam is "bent" back towards the waters surface. When the beam strikes the water it reflects its energy back to the radar and it is that image which is displayed on the radar picture. In certain circumstances the inversion can be strong enough such that displays similar to the one below occur. This phenomenon is the price to be paid for increased sensitivity which means that rainfall and thunderstorms are much better depicted by the radar. With practice it is quite easy to recognise the difference between real and anomalous echoes. <a
Warnings
No warnings within 100 km.
State Wide
Temperature
Sunday Island
29 °C 24 °C 4am 26 °C 3pm
↑ Warming
Now: 29 °C
Tides
Sunday Island
5:20am 2.30m 11:50am 7.65m
↑ Rising
Current: 7.53m
Weather Now for Sunday Island
29 °C
Feels like 30 °C
Wind
8 kn WNW
Humidity
57%
Pressure
1015 hPa
At Lombadina Airstrip
Nearby Wind
50 km radius
N S W E 8 kn Lombadina Airstrip
Sunday Island
8 kn WNW
Recent Locations
Sunday Island
8 kn WNW
29°
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9 kn ENE
20°
Redhill
8 kn ESE
17°
Mount Crawford
14 kn ESE
12°
Kainton
9 kn E
17°
Mount Benson
7 kn SSE
15°
Tilba Tilba -
Sun
5:47am rise 5:42pm set
11 h 55 m of daylight
Now: 11:12am
53 seconds more than yesterday
Moon
5:01amrise 5:05pmset
1% illuminated
New Moon
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