What's the northernmost palm you've seen? (growing, palms, backyard, spring)

[Sun Belt-lover L.A.M.]

All the states I've been to (besides Tennessee, of course):
--Arkansas (twice)
--Alabama (once, just passing through)
--Georgia (once)
--Kentucky (several times)
--Louisiana (once, just passing through)
--Mississippi (once, just passing through)
--North Carolina (once, barely - technically twice if going, but not staying, two days in a row in a single vacation counts)
--Texas (once)

Have I seen any in each of those states? (not counting dead-looking or clearly dead Chinese Windmill Palms):
--Numerous in Dallas. I don't remember what the tree-like ones looked like, but based on their climate and location, I would guess they were either Cabbage Palmettos or Californian Fan Palms.
--I probably passed right by many Dwarf Palmettos growing wild in Arkansas, Louisiana, Mississippi and Alabama (on my way to/from Dallas), but because that was in April 2016 (when I was barely 13 and still didn't know palms can be shrubs), I never noticed/paid attention to them.
--The one time I went to Atlanta, I was so unhappy to be there (I had an irrational fear of leaving the state until shortly after I turned 13) that I never paid any attention. The same can be said for all but the final two times I visited Kentucky, and I never noticed any (although to be fair, I was only briefly passing through a small town one of those times) either of those.
--When I went to North Carolina, my whole time spent there was in Great Smoky Mountains National Park. Therefore, I didn't see any due to being in a national park where they aren't native; not that the hemiboreal climate of the montane spruce-fir forests would be conducive to their survival anyways.

As for the places in Tennessee I've seen them (in person and outdoors only, again not counting dead or injured Chinese Windmill Palms)...
--Cookeville, TN - A nursery at the junction of S. Willow Avenue and Fairground St. carries European Fan Palms off and on during summer and late spring, and they don't seem to be the type of nursery to carry houseplants.
--Celina, TN - There's a small palm planted in front of Doris' Diner. I couldn't tell what type it is, but it's not a Needle Palm (they have tough leaves and thorny stems, both of which are easy to identify), nor is it a Chinese Windmill (the palm isn't a trunking palm). Of every palm I've seen (even if you count dead ones too, which I wouldn't), the one in Celina is the northernmost.
--Hendersonville, TN - The Streets of Indian Lake was the first place outside of Dallas I ever noticed any. The four Chinese Windmill Palms appeared to be dead as of May 2018 (although one might've been just severely injured), but there were two Needle Palms for every Chinese Windmill Palm that appeared to be healthy and getting quite big.
--Pigeon Forge/Sevierville, TN - On our way back from Clingman's Dome, I was in disbelief to notice a HEALTHY, decent-sized Chinese Windmill Palm (as opposed to dead ones I've seen in Hendersonville, Baxter and Algood) near the border between Pigeon Forge and Sevierville. This was in mid-April 2019, and seeing subtropical scenery on the way back was a stark difference to the frosted subalpine conifers (even for mountain weather, we were unlucky to get a low in the teens and high near freezing at the summit) we saw near the summit.
--Baxter/Buffalo Valley, TN - We're attempting to grow two Needle Palms in a part sun/part shade part of our backyard. We planted them in late April and have surrounded them with mulch, both to increase their chances of surviving the 2019-2020 winter.

What's the northernmost you've seen, compared to the northernmost place you've been and every palm you've seen?

[terracore]

I saw a palm in Seattle, but I don't know what kind it was.

[engineman]

There a few in Vancouver BC close to the water. I don't know what steps are taken to protect them.

[coschristi]

There is a palm about a block away from my BIL's place in Hobbs, NM. I killed a Majesty Palm I tried to grow here in Colorado. Poor Palmy!

[jacqueg]

I've seen them in both Oregon and Washington on the we(s)t side of the Cascades.

[turkeydance]

hotel lobby in Iceland.

[ABQConvict]

Scotland.

[Serious Conversation]

I live in northeast TN, and I know a few hobbyists keeping short palms the size of a large bush.

[B87]

I assume you mean unprotected palms that are permanently planted, and not moved inside for the winter? There are palms in Scotland.

If you're talking about feathered palms like date palms, then there are some in coastal Norfolk, UK. Plenty of Canary Island date palms in London and the south coast of England.

[normstad]

Ireland. Many of them there.