"Jose" wrote:

The StrikeFinder can also help identify serious convective activity, but
then again, so can NEXRAD + Echo Tops.

... except Nexrad is at least seven minutes old, and sometimes fifteen.
What prompted the question was watching hearing boomers out my window, and
seeing that Nexrad had only light rain showing. On the next update, seven
minutes later, some moderate rain was showing. Meanwhile, it was thunder
and lightning outside my window.

I'd've been unhappy in the air.

In practice, it doesn't seem to matter much.

The lag has not caused any problems for me in two years of regular XM Wx use
in thunderstorm country.

As with all things in flying, judgment and experience make the difference in
using linked NEXRAD safely.

--
Dan
C172RG at BFM