ADDS experimental Flight Path Tool
http://weather.aero/tools/desktopapps/flightpathtool
"The Flight Path Tool (FPT) is a comprehensive, interactive, geographical display that brings together all of the weather products available on ADDS. It runs as a desktop application on your computer for maximum performance.
The Flight Path Tool can overlay multiple fields of interest: icing (probability, severity, and super-cooled large drops), turbulence potential, convective diagnosis and forecast, ceiling, visibility, flight category, winds, relative humidity, temperature, radar (base and composite reflectivity), satellite observations (visible, infra-red, and water vapor wavelengths), AIRMETs and SIGMETs, METARs, TAFs, and PIREPs.
All 3D data can be sliced horizontally at selected flight levels or vertically along a flight path. All data can be animated in time."