Yes, that's right Norman. I asked a BBC forecaster why fronts kept splitting
as they crossed the UK and that was the answer. A case of the using the wrong
interpolation algorithm.

Roger

Norman Lynagh wrote:
In message , Rodney Blackall
writes
Does anyone here know why, when an area of rain is projected to move
across
the country on BBC TV presentations, it does so rather like a worm? (The
leading edge moves on leaving the trailing edge in place, then the
trailing
edge catches up while the leading edge is stopped.)

I would have expected it to be more difficult to program this effect than
the more realistic whole-body translation.


Morphing between 3-hourly time-steps?

Norman.
(delete "thisbit" twice to e-mail)