Call Lightning - does it hit things in the air 20 feet above where it hits the ground?

 I dunno. It came up vs. the "tower" of the Old Bonegrinder. One hag was in a window (inside) but call lightning hit right next to that grid-square but on the ground to hit another creature. Should the window hag have taken damage? I decided no on the spot, but logically it might... maybe. I mean real lightning that passes near you I think would singe you, but if the main point of contact is somewhere else, that area would take the brunt of the damage. 

I figured for fairness, it needs to be 5 feet of the hit point in either 2D or 3D. So if she would have just been 5 feet in the air, yeah it'd have hit her, too. 

What do the rules ppl say? I'm gonna search. 

ANSWER: Only 3.5e addressed it, and it said the last 30 feet (and a 5 foot wide, aka one grid-square) are hit! 

ANSWER 2: So I'm gonna say, apply that to 5e, means that everything within 5 feet of the point on the ground or wherever the final hit spot straight up at least 30 feet, probably more, gets hit. 

--

Slightly related: https://www.reddit.com/r/DnD5e/comments/9iu95p/call_lightning_question/

Very related is the 3.5e d20srd bit, my red emphasis:

Immediately upon completion of the spell, and once per round thereafter, you may call down a 5-foot-wide, 30-foot-long, vertical bolt of lightning that deals 3d6 points of electricity damage. The bolt of lightning flashes down in a vertical stroke at whatever target point you choose within the spell’s range (measured from your position at the time). Any creature in the target square or in the path of the bolt is affected.

--

BTW, 5e says inside you need a big room 60 radius 10 feet of up down space or something. 

But 20srd (3.5e) says it CAN be cast indoors, no mention of need for cloud size stuff. 

https://www.d20srd.org/srd/spells/callLightning.htm  This spell functions indoors or underground but not underwater.

https://www.dndbeyond.com/spells/2022-call-lightning 

A storm cloud appears in the shape of a cylinder that is 10 feet tall with a 60-foot radius, centered on a point you can see within range directly above you. The spell fails if you can’t see a point in the air where the storm cloud could appear (for example, if you are in a room that can’t accommodate the cloud).