called microclimates

lake effect would be warmer, something seems to be keeping that comma you mention the
same temp as the area around it has warmed.
cold air sinks. I know Wisconsin and there are a couple dots that are colder in the
western part of the state due to deeper valleys. now between WI and MN the
Mississippi joins a tributary and it is a large enough body of water to heat that
area.
cities are significantly warmer, called heat islands. there is also manufacturing
that would warm the areas on either side of that comma. pollution from manufacturing
might significantly block sunlight. even air planes contrails have been shown to
block sunlight (perhaps the only good thing to come of 9/11 was the ability to detect
affects of planes on environment).
Ingrid

FragileWarriorElf wrote:

wrote in news:458ba056.247145406@news-
server.wi.rr.com:

http://arborday.org/media/zones.cfm

Can you explain something to me? On the border between Indiana and
Illinois there is little coma shaped zone 5 in the middle of a massive area
of zone 6. Is that a lake effect thing? And why that odd little shape?

It never fails that I am *somewhere* near one of those odd little areas and
I have wondered how and why they are there.



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