“ ... the true challenge here was being able to calculate the actual wind speed and direction all the way to the target.” — - Ryan Cleckner, former U.S. Army Ranger sniper
They mention using Kestrel meters. You can get Kestrel weather meters with integrated applied ballistics and data communications links that look pretty interesting.
Not hard to imagine a few of these sprinkled (or droned) along a proposed trajectory to inform the sniper’s second of the conditions “all the way to the target”.
We have weapons systems on our gunships that have Laser Wind Detection that can calculate the correction factor for projectiles for the wind along the entire flight path to target. The ones I am aware of are for airborne systems, not carried around by a sniper team, but for all I know they have something like that compact enough now for such use. That would take a great deal of the guess work out of the problem.