Welcome to our weekly report of river operations on the Murray. This one covers the river week ending 25 February.
Rainfall and inflows
At the start of the week, a surface trough extending from inland western Queensland, through New South Wales and central Victoria triggered thunderstorms and showers. This produced moderate rainfall totals for parts of eastern Victoria, through central New South Wales and light rainfall for southwest Queensland (Bureau of Meteorology).
A low pressure system located on the monsoon trough, over the Coral Sea deepened and developed into tropical cyclone Marcia on 18 February. Cyclone Marcia reached the east coast on 20 February bringing heavy rain. Thunderstorms also formed along a surface trough situated through Queensland’s interior producing light to moderate falls for southern inland Queensland and areas of northwest and central New South Wales (Bureau of Meteorology).
In Queensland, Cunnamulla in the Warrego catchment received 63mm of rain for the week, while The Head and Killarney in the upper Condamine Balonne received 128mm and 56mm respectively. In New South Wales, notable rainfall totals included 40mm at Glen Innes in the north east and 38mm at Mulwala Post Office on the River Murray. In Victoria, Myrtleford in the Ovens catchment received 32mm and Hinnomunjie in the Mitta Mitta catchment recorded 37mm.
There was little rain across the upper Murray catchments this week and stream flows remained low. On the Mitta Mitta River, the flow at Hinnomunjie Bridge was relatively steady, averaging 270 ML/day. On the upper River Murray, the flow at Biggara receded from 390 to 330 ML/day while on the Ovens River, the flow at Wangaratta remained around 300 ML/day.