The models produce velocity and direction numbers for the winds at 4572m, 3658m, 2743m, 1829m, 914m, 610m, 457m, 305m and 10m. I just picked the 2743m shear to start off as it's middle of the range. We could use more than two of the levels. But I'm not sure of the best way to incorporate multiple shear measurements into the forecast.

Perhaps we just add them, eg:

shear1 = vector_shear(ground, 914m)

shear2 = vector_shear(914m, 2743m)

total_shear = magnitude(shear1) + magnitude(shear2)

and then use total_shear in a similar way to the shear index in my previous post? Or is there a better way to integrate the different levels into the forecast rather than simply add their magnitudes together? Any suggestions which levels would be most useful to incorporate?

Many thanks,

Dave