Central Australia is about to be delivered a Christmas wish, with widespread rainfall likely to bring good falls to the entirety of Interior Australia over the Christmas/Boxing Day period.
A tropical low which originated near Darwin has since tracked over the Kimberley producing record breaking rainfall over Broome and significant widespread rainfall over the Kimberley and Eastern WA. This low is expected to be located West of Giles during Christmas Day and begin to track in a more South-Easterly direction where it should be located over Northern SA during Boxing Day before moving into the Bight and disintegrating.
OCF Forecast Rainfall for Christmas Day via BSCH
OCF Forecast Rainfall for Boxing Day via BSCH
While the low sits over Central Australia, a large and very strong Northerly moisture fetch is forecast to feed down from the waters off of the Northern Territory and Gulf of Carpentaria. This moisture is expected to feed into a warm environment creating large areas of convection leading to scattered storms and widespread rain areas. These rain areas should be prolonged and produce widespread falls of 50-150mm across Southern NT, Northern SA and Eastern WA. Isolated falls of 200mm+ cant be ruled out. Flooding is likely with some towns potentially being isolated. There is also the chance that some 24hr records MAY be broken.
Gusty winds may also accompany the low as it maintains a fairly solid and intense circulation. These winds COULD bring down some trees and rattle a few windows, especially through areas such as Giles (Eastern WA) and Northern/North-West SA on Christmas/Boxing Day, Central Coastal/Adelaide Metro on Tuesday. A flood watch is already in place and a severe weather warning is probable for South Australia.