How about port side red smoke, starboard side green? Still smoke will
not show well. No point on night landings, just maintain increased
separation.

How about a ground based LIDAR to measure turbulence and/or windshear?
Then the localized air turbulence could be displayed in some of the
runway marker lights. Blink some of the lights in a pattern to indicate
the location of the turbulence or windshear or shifting
headwind/tailwind. The idea is some method of telling the pilots where
to watch out for turbulence of all kinds. There have been studies to
develop a LIDAR system on aircraft to watch for turbulence ahead. A
system on aircraft adds to the operating cost but is always available
to each plane so equiped. A system on the field would be available to
all planes but localized. On approach the pilot would have an idea of
how bad is the turbulence and whether or not to make a go-around. This
would only help on the field not on the approach or anywhere else. A
simple system would be a marker pattern that only indicates that there
is turbulence anywhere in the approach pattern but not any information
of specific location. This may be enough.

James