Northernmost zone 8 climates in the western Us.

[EastCanadaTropicals]

I see a few northern zone 8 microclimates in hardiness zone maps, and get always interested in the palmy potential, here are the ones I've found in the interactive map that I think are accurate, because there are some errors with the interactive maps: 

I don't see how this one is made. The island in that lake is probably the only zone 8 area around that lake. This anomaly appears in both the USDA and interactive maps.

This zone 8 anomaly, totally makes sense. The area is really small so you can only see it in the interactive maps. It's super sheltered by the mountains and river, a washy filifera might survive unprotected there.

Edited February 28, 2021 by EastCanadaTropicals

[EastCanadaTropicals]

The pictures got a bit mixed up for some reason, but I hope you can still tell which location is which. Cya later!

Edited February 28, 2021 by EastCanadaTropicals

[Xerarch]

Surprising to see the Pyramid lake area of NV being 8a, the lake is about 3,800' in elevation which believe it or not is pretty low elevation by Great Basin standards, for example another real "low spot" in the Great Basin would be the Great Salt Lake, which is about 4,200'.  As far as northernmost 8a in the west.  You could follow the Pacific coast all the way up well into Canada before it fell below 8a.

For inland areas 8a, I've seen some 8a blips in far western central Idaho along the Snake River.

[ShadyDan]

1 hour ago, Xerarch said:

Surprising to see the Pyramid lake area of NV being 8a, the lake is about 3,800' in elevation which believe it or not is pretty low elevation by Great Basin standards, for example another real "low spot" in the Great Basin would be the Great Salt Lake, which is about 4,200'.  As far as northernmost 8a in the west.  You could follow the Pacific coast all the way up well into Canada before it fell below 8a.

For inland areas 8a, I've seen some 8a blips in far western central Idaho along the Snake River.

Some islands in south Alaska would be 8a I think. The Queen Charlottes in BC just south of Alaska are 8a. Very different than a southern 8a but technically counts. 

[EastCanadaTropicals]

15 hours ago, Xerarch said:

Surprising to see the Pyramid lake area of NV being 8a, the lake is about 3,800' in elevation which believe it or not is pretty low elevation by Great Basin standards, for example another real "low spot" in the Great Basin would be the Great Salt Lake, which is about 4,200'.  As far as northernmost 8a in the west.  You could follow the Pacific coast all the way up well into Canada before it fell below 8a.

For inland areas 8a, I've seen some 8a blips in far western central Idaho along the Snake River.

I think it's only the coast of the island.

[EastCanadaTropicals]

15 hours ago, Xerarch said:

Surprising to see the Pyramid lake area of NV being 8a, the lake is about 3,800' in elevation which believe it or not is pretty low elevation by Great Basin standards, for example another real "low spot" in the Great Basin would be the Great Salt Lake, which is about 4,200'.  As far as northernmost 8a in the west.  You could follow the Pacific coast all the way up well into Canada before it fell below 8a.

For inland areas 8a, I've seen some 8a blips in far western central Idaho along the Snake River.

I added the Idaho zone 8 microclimates. Riggins is so sheltered, i bet a trachy might live there or a washy filifera unprotected.

[EastCanadaTropicals]

Lucile, Idaho might also be zone 8a, as well as parts of White Bird, Idaho.

Edited March 1, 2021 by EastCanadaTropicals