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)
--
Norman Lynagh Weather Consultancy
Chalfont St Giles 85m a.s.l.
England