Overall, Casper, Wyoming will be the Prime location to be for the Great American eclipse.
There will be many locations across the USA to view the Great American Eclipse, but none will exceed the opportunities in Casper, Wyoming. Why ? One might ask.. Here are the reasons that the "professional" eclipse chasers from around the world, NASA, and ASTROCON are converging on Casper:
1) Clear skies: The number one issue when viewing an eclipse is clouds and clear skies. Casper, Wyoming historically has 96% clear skies in the mornings in August. The normal weather pattern is for clear skies from the nighttime into the morning. If clouds build up, it is usually afternoon with evening shower.
2) Low humidity: Humidity can distort the atmosphere and filter out the fine details, causing less than ideal conditions for eclipse viewing and photography. Casper is located in a semi-arid desert location, with very low humidity in August, making it the best location in the nation for clear astrophotography and viewing.
3) Low light interfearence: Central Wyoming is well known for its dark nights and low interfearence from man made light sources, making it ideal for nighttime viewing, star gazing, photography, and eclipse viewing without "haze" and "glare."
4) Mobility: Interstate 25 east of Casper, and highway 30 west of casper run paralled to the "center line" of the eclipse, allowing for quick relocation if clouds appear just before the eclipse "show time". Over 150 miles of open road are available parallel to the center line in order to move to a prime viewing location. This makes the Casper area a very easy location to find a clear and safe spot for viewing. Visitors should spend a few hours scouting a couple of alternate locations east and west of Casper so they are fully prepared.
5) High elevation areas: Atmospheric distortion is improved with altitude. At over a mile high, Casper is a prime location to view with very low distortion. Casper, Wyoming is located along the Rocky Mountains, and has the advantage of high elevation locations to view the "shadow effect" as the eclipse approaches.
6) Crowds: Contrary to popular belief, Casper and central Wyoming will not be packed with massive crowds in comparison to many other favored areas. Because Casper is in a more remote area to access, the crowds are expected to be large, but not excessive. In addition, Casper is hosting ASTROCON and NASA research, meaning there will be many high level opportunities to "learn from the experts" at the festivals and exhibits the week prior to the eclipse. You will only find the world class expert eclipse chasers in Casper.
Casper, Wyoming is the Premium spot for NASA, ASTROCON, and the world expert chasers, so why go anywhere else??