Came across this today, and thought you all might also think the alternate spellings are interesting. I don't want to put the link because there are a couple of ads, but if anybody should happen to put the main term into The Free Dictionary, there is a good bit more information. Here's the relevant para.:

Tidal bore
The tidal bore in Upper Cook Inlet, AlaskaA tidal bore (or simply bore in context, or also aegir, eagre, or eygre) is a tidal phenomenon in which the leading edge of the incoming tide forms a wave (or waves) of water that travel up a river or narrow bay against the direction of the river or bay's current. As such, it is a true tidal wave and not to be confused with a tsunami, which is a large ocean wave traveling primarily on the open ocean.

So Trom, how about it???You live in Alaska.

Well, I live along a branch of Lower Cook Inlet, and while we have huge tidal fluctuation it's not a tidal bore. That phenomenon happens, I believe, in Turnagain Arm, up by Anchorage. I have a vague recollection of seeing aegir/eagre/eygre once upon a time. It was probably back in 1966 when I was taking Geography 101. I've driven along Turnagain Arm dozens, if not hundreds, of times, but never at precisely the right time in daylight to be able to confirm or deny phenomenon. That's my story.

Peter (or, if you prefer, Trom)

So maybe this spring/summer you owe it to yourself to
take a trip up there so you can report back to us about
the aegir/eagre/eygre. I await with baited breath.

Just FYI--the site names several other places this phenomenon occurs.

Well, I know one of them is NOT Kentucky !

A five-hour drive (each way)is probably more than I want to do to watch the tide come in, but I do have a trombone in need of some repair, so a trip to the Big City may be in order.

Edit: I will, of course, Luke, check a tide table to be sure to arrive at precisely the right time.

There you have it!
Everyone needs a trombone in good working order.
Go for it! That way the tides just become sideline of your trip.

And, as it happens, a bass, and therefore large-bore, trombone.

There is some tie in there to your forum name, Peter. I just can't quite get it!

Were you in the original seventy-six??

Yes, but the words: tidle bore, aegir, eagre, or eygre
aegir, eagre, or eygreare not be found in Online Etymology.
... Aegir is the god of the sea in Norse mythology.

eagre:1640–50; apparently representing earlier agar, ager, obscurely akin to hyger, higre; (compare Anglo-Latin (12th century) higra the tidal bore of the Severn); compared with Old English ēgor, eogor flood, high tide, though preservation of g in modern forms is problematic

bore (v.)

O.E. borian "to bore through, perforate," from bor "auger," from P.Gmc. *buron (cf. O.N. bora, Swed. borra, O.H.G. boron, M.Du. boren, Ger. bohren), from PIE base *bher- (2) "to cut with a sharp point" (cf. Gk. pharao "I plow," L. forare "to bore, pierce," O.C.S. barjo "to strike, fight," Albanian brime "hole").

Bore, here, is also used as a growth, mole like, on
a plant, such as a tree.

Take your time, Candy.

The Music Man??

"I plow," Yep, they plow right up the river.

The definiton is complete haberdashery.

I once waited nearly an hour to see a tidal bore and when it finally made it all the way up the River Hebert River to the town of River Hebert it was about 4 inches tall.

I've played in the pit orchestra for the show; close enough?

I'm sorry...I have to leave now, I'm at this whole page of comments.

If not in the original, at least you made it to the
"in the school of" followers.

Thinking about your "Easter bonnet" now, are you??

(a weak effort stay on topic)

Em...does haber mean something?

According to AHD4 haberdasher is perhaps from the Anglo-Norman hapertas, 'petty wares'.

are there roolz about that!

Aren't there roolz about everything??

Ha! Good one.
I think there was a misunderstanding about what was meant by Haber/balder/dash/ery.

Yeah, really good. Thanks Peter.

I think there was a misunderstanding about what was meant by Haber/balder/dash/ery. Oh. Dang--I thought haber might be some Dutch word--maybe for river--and she was saying the tidal bore dashes up the river.

Roolz?
No. No rules. Most threads develop from this to that. But this one
is really, just like your comment shows, eh .... ... words fail.

Jackie???? What is balder doing in the dashery???

You couldn't have written all the words up the same way, now could you, Peter. No. I had to turn my laptop one way and then the other to read all the lines. Just as well I don't have a desk monitor

Nothing like a good yardstick.

Jackie???? What is balder doing in the dashery??? Ida no; maybe olly's losing his hair?

It's only fair, Candy; I have a desktop monitor, and I have to turn it upside down every time you post.

Oooooooh.....Peter. Nice one.

Peter.. +1 (as the saying goes).

Whats this....ganging up on me now, are you!

Not really, just like the "down under" application.