Even with a VHF G5, you'll only be able to monitor NOAA in a separate knob position apart from any 800 MHz frequencies. You'll not have the benefit of any SAME alerts or the level of sophistication achieved with most scanners today. As others have posted, smartphone weather apps will pass along most NOAA weather alerts and are your best choice.
You can set it to alert on a 1050hz long tone. But that's about it.