Well that's scary in its self as I don't know anybody who wouldn't have the radar on in that situation .If I forgot for sure the FO's around here would just say hey let's take a look to the north and I would say thanks.In flight, sure but this is on the ground. Just a technique. Many guys don't even get the radar on until at the runway as part of their takeoff checklists.
What's your burn story? You didn't notice something funny when all that green/yellow/red stuff went away when he opened to a bigger range?
Although I do have an app that does a real good job with only 5 min lag that I may look at before they close the door.