In December 2014 we upgraded our lightning network to the latest in sensor technology as used by the world's leading meteorological agencies. This has resulted in changes and improvements to the lightning data you will now see. The main changes are:
Distance and latitude/longitude coordinates are displayed when you mouse over the map. The origin for distance measuring is indicated by a red dot and defaults to either your location, if specified and in range, or the location of the radar/the centre of the map. The origin may be changed by clicking elsewhere on the map.
LocationSE of Darwin Airport Radar TypeWSR 74 C Band Typical Availability24 hours
The Berrimah radar is located on a rise with the dish antenna tower mounted approximately 50 metres above the surrounding topography. It has a good coverage in all directions up to a range of 250 km with the following two exceptions: (a) some local masking of echoes at low elevations to the east; (b) some signal blockage to the north-northeast due to several HF transmitter towers. 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. Because the beam width of this particular radar is only 0.9 degrees, it may 'undershoot' high level storms and rain echoes may appear less intense than actual rainfall rate. During the dry season from May to September, when low level atmospheric temperature inversions are more prevalent, images may display areas of relatively strong (Level 2 or 3) permanent echoes. These tend to be reflections from coastal features; commonly from Gunn Point and the Cobourg Peninsular northeast of the radar, and from the nearside coastline of the Tiwi Islands to the north. Also during this time of the year, a false image of the Timor coastline may sometimes be seen extending northwest from Bathurst Island. This phenomenon is due to second skip returns at multiples of the radar's maximum range.
16:55 EST Yesterday, spectacular storms rumbled throughout the ACT and surrounds, but calmer weather is around the corner.