Came across this nice forecast page at Weatherzone.com.au that gives rain percentage chances and estimated amounts on top of BOM models:

http://m.weatherzone.com.au/tas/lower-derwent/hobart

it also gives 3 hourly forecasts which add a bit of detail to work out whether it will rain in the morning or arvo:

http://m.weatherzone.com.au/tas/lower-derwent/hobart/next48hours

It also gives a 7 day forecast & 3 hour forecasts (click on "Next 48 Hours" for 3 hour forecasts) for other locations, which you don't get on the BOM:

• Launceston
• Swansea
• Fingal
• St Helens
• Tunnack
• Melton Mowbray
• Bushy Park
• Lake St Clair
• Maydena
• Burnie
• Sheffield
• Smithton
• Marrawah
• Strathgordon
• Strahan