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Some capital city rainfall radars get a rebuild
The main rainfall radars serving Adelaide, Melbourne, Sydney and Brisbane are to be upgraded. The main purpose of the upgrades is to give mid-life servicing which will extend their operation by another ten years, but in some cases they will gain new facilities that will help forecasters.
The first to get the treatment is Adelaide's Buckland Park radar which went offline on 11 April and is expected back in service in late May. In addition to normal servicing, it will have a vertical beam added to the normal horizontal beam which allows for the shape of precipitation to be detected, so it can distinguish for example between rain and hail. A Bureau video explaining the upgrade is available here. While Buckland Park is out of service, Adelaide's second radar at Sellicks Hill will take over duties.
Melbourne's Laverton radar, Sydney's Terrey Hills radar and the Brisbane Mt Stapylton installation will follow later, with the tentative dates of 2 August to 8 September for Melbourne and Brisbane and 24 August to 28 September for Sydney. Alternative radars are yet to be announced.
April sunshine warms SA, NSW and NT
A combination of northerly winds from the interior and days of generous sunshine have given parts of SA their warmest April day yesterday and warmest night last night for at least a decade. The winds precede a northwest rainband that is moving into the NW half of the state today.
Maximum temperatures yesterday were between 4 and 8° above the April average across eastern SA, southeastern NT and western NSW giving some locations their warmest April day in up to 12 years for this late in the season. Overnight, the abnormally warm temperatures contracted to SA, but were between 4 and 10° above average over much of the state. Adelaide's minimum of 22.6° was 10.2 above average, and the second highest in the state after 22.8° at Marree, while Clare had its warmest night in its 23-year climatic history at 19.4°.