Skew-t

Skew-T Log-P diagrams are commonly used for weather analysis and forecasting. They graph weather balloon data to show the vertical profile of the temperature and dew point through the atmosphere.

See the following Finger Lakes Soaring Club web link for a great article describing how glider pilots use skew-t graphs to predict weather for a days flight.

http://www.flsc.org/portals/12/PDF/Read_Skew_T.pdf

Features:

Uses data from http://rucsoundings.noaa.gov/

Automatically download the day's weather data

Use the slider to quickly view all hour-by-hour graphs.

Zoom to inspect the graph details

Configurable units and graph lines

Use different weather models

Show forecast graphs for the next few days

Saved favorites to quickly view different locations and/or weather models.

Here mode uses GPS to easily get graphs for your current location.

Load waypoints from files.