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.
LocationCarnarvon Airport Radar TypeWF 100 C Band Typical Availability2100-0700; 0900-1300; 1430-1900
The Carnarvon radar has an unrestricted 360 degree view with no permanent echoes. Some anomalous propagation may occur, usually manifested as false echoes along the Shark Bay coastline and extending north to include the islands off Carnarvon. This phenomenon usually occurs due to an inversion layer or when strong winds whip up spray from large swells just offshore. During the summer months cyclonic formations may occasionally be observed out to sea but it is more common to observe cyclones that have crossed the coast in the north Gascoyne or Pilbara regions, weaken into rain bearing depressions as they pass through the Gascoyne region tracking south-east. Heavy rain directly over the radar site can cause attenuation of all signals. Path attenuation can also occur when the radar beam passes through intense rainfall, with the returned signals from cells further along that path reduced.
09:31 EST The New South Wales State Emergency Service (SES) says it has received about 1,000 calls for help since a severe hail storm hit Sydney and the Blue Mountains late yesterday, adding to the backlog created by a powerful east coast low earlier in the week.