NOAA is years behind in addressing a needed upgrade to their NEXRAD network. They proved out an upgrade using fixed, phased array radar panels instead of the rotating array and got the update interval down from five minutes to 30 seconds or less. The holdup is the FAA: they want to create a network of dual-purpose, dual-use radars that can function both as weather radars and air traffic monitoring radars (a pretty easy feat for software-driven, phased array systems). However, the FAA can't get their act together and come up with a new specification because they keep wanting to cram more functionality and use-cases into the system (eg: support for unmanned aerial vehicles). Meanwhile, NEXRAD keeps limping along and people die because some storms change direction quickly enough that waiting five minutes for an update can be the difference between a tornado missing you if it took it's original track and being right on top of you before the local NWS figures it out.