Hi, I have been doing the same thing this afternoon.

This is what I came up with. Seems to work here, but I dont really know what I'm doing, so I hope it works for everybody else.
>Edited.
Update -
I have changed the refresh rate of the 'Jetstream' overlay as the linked image updates a lot less. The 'Current Oz Weather' sometimes needs a manual refresh to get going?
Rainfall radars, temp, humidity, wind, windchill and satellite overlays remain the same.
Cheers.