Listen to Embo, but doesn't look like much concern to me -- this is not unusual for sugar maples or certain other trees. One of mine is exactly the same. Get a stiff stick or rod in there at times & try to clean out any debris, then take a hose w/as narrow a spray as you can get & water-blast it out.

PS Holes look like sapsucker holes.

not every dude with a chainsaw is a certified specialist ....

https://duckduckgo.com/?q=isa+Certified+Arborist&t=ffcm&ia=web

peace of mind is going to cost you a bit ... but be worth it ... imo ....

in tree time there may be no issue... but having a professional ON SIGHT inspection is ...

welcome to the forums .... next time.. include your location .... the type of storm potential is the secondary issue .... are you in a hurricane area ... tornado area??? ... etc ...

ken

Thanks for the responses everyone, I’ll have it looked at by a certified arborist.

Ken, I’m in Louisville, KY so hurricanes aren’t a concern. Tornadoes are always a possibility but they don’t seem to be very frequent in my area. I’m mainly thinking about high winds from severe thunderstorms.

To add, I'm not sure there actually is significant decay there -- your ruler going in may just be finding space still open inside that's not visible. And sapsucker holes aren't usually a problem unless there gets to be dozens of them.

Are you sure it's a sugar maple? Norway maple gets those kinds of narrow trunk angles and they very commonly lose one side or the other. I'd have to see a picture of the branching to know better.

I’m pretty sure it is a Sugar Maple. I have two Crimson King Norway Maples in the front yard and it’s definitely not one of those.

seaborn, yes, definitely a sugar maple -- from the bark for one thing. Fall coloring at the top for another.