Max got this idea started with his trip out to CO last fall and it has since been brought up once or twice more. I figured why not create a thread to list the 'danger' zones around the country. Those locations where things can throw your entire plan into havoc ruins simply because you didn't know better. Things, like tumbleweeds, goathead thorns, regular high winds etc.
Preferably this is for things that aren't common sense, err tornadoes in the Midwest during the spring months, hurricanes in the SE/E states June-October, snow in the northern states during the winter months. This can include things like daily valley winds. I know I have heard of one spot(don't know the town for sure) in CA where every afternoon their is 50-60 mph winds going through the valley. This is the targeting things you normally wouldn't think to ask someone about and could easily find your in way over your head on a tour as a result of not knowing better.
The way to list things:
The problem(tumbleweed, goathead thorns, black flies, frequent high winds, etc)
Where(locationwise) does this problem exist
When(season) does the problem present itself
If I have missed something in the method of listing things, include it.
I'll mention one I know part of when it comes to location but I'm not sure how much of a problem it is out west.
Blackflies. Yes, those pesky biting little creatures that you don't even realize has bitten you until long after they have taken a hunk out of you.
They hang out in the northern New England states generally between Mothers Day and Fathers Day weekends. Once the temps start getting up into the 80s regularly they disappear very quickly. Anytime in that time frame being outside can leave you wishing you were indoors. Especially if you happen to be around running water. Unlike their biting cousins, the mosquitoes, blackflies like running water, mosquitoes like standing/still water. They also are known for hanging out in massive swarms up in Alaska(haven't ever been in AK), and I'm not sure if they are in other northern states west of NY or not. I never had them in NW Ohio when I lived there. I've only had to deal with them once...at the end of my first New England century ride. I had to stop and go the bathroom, no nothing anywhere around and I couldn't hold it. I ended up leaving my rear end wide open for them and it was a couple of days before Mothers Day weekend to boot. I know when you get around a lot of running water they can be a much bigger problem, talk to any hikers and they can probably tell you all kinds of horror stories about running into swarms of them.
Now for all your list...I'm interested in both the goathead thorns(still have to look that one up on line to see what they even look like) and more importantly tumbleweeds. I didn't tumbleweeds were around anymore, I thought they were of settlement days and not seen anymore. I would have guessed they were only around desert areas and not northern/central CO. Shows how little I know.