Have you verified that your Scout has the latest firmware?

Unfortunately, there are no user settings so there's not much to do. The "No Data" display on the map would normally indicate that Scout is connected to towers but hasn't received any weather info. Are you sure you're just not in a dead zone when this happens? Is the setting to show the towers on?

What altitudes are you at when this is happening? There aren't a lot of towers in that area, so depending on your exact position, altitude, and any other interference, I'd guess it was highly probable that you could be losing signal.