An excellent article with tips on things you can do to improve seeing conditions.

Briefly discusses a Scale for evaluating seeing introduced by William H. Pickering at Harvard Observatory at the turn of the 19^th century.

Damian Peach has annotated the Pickering Seeing Scale with animations.

Another excellent animation of seeing effects using Jupiter as the target.

Another good article showing how topography and weather affect seeing.

Another good discussion of the Pickering scale and how it is effected by aperture.

From the folks who bring us the Clear Sky Clocks. There is a nice animation to help you evaluate your seeing.

A brief article defining seeing and its causes. You have an opportunity to participate by contributing your seeing observations.

Dr. Clay does an excellent job differentiating between transparency and seeing. Some nice star charts are given to aid in determining transparency in terms of visual limiting magnitude. Dr. Clay also gives some down to earth methods of evaluating seeing as well.

A very detailed article on seeing, the different atmospheric layers, evaluation, and optimal observatory location.

This article gives a good but brief overview of atmospheric seeing conditions.

Jet Stream Forecasts

The following URLs can be used to keep track of what the Jet Stream is doing over the North American continent:

http://www.weatherimages.org/data/imag192.html

http://www.weather.com/maps/activity/aviation/sundayusjetstream_large.html

http://www.weather.com/maps/activity/aviation/mondayusjetstreamforecast_large.html

http://www.weather.com/maps/activity/aviation/tuesdayusjetstream_large.html

http://www.weather.com/maps/activity/aviation/wednesdayusjetstream_large.html

http://www.weather.com/maps/activity/aviation/thursdayusjetstream_large.html

http://www.weather.com/maps/activity/aviation/fridayusjetstream_large.html

http://www.weather.com/maps/activity/aviation/fridayusjetstream_large.html