Active Sky XP is one of, if not the most anticipated addon of the year. Since it's announcement back in 2017 and subsequent progress updates since, the community has eagerly awaited the first X-Plane product from HiFi Simulations.
From the HiFi website: ASXP will have plenty of features to enhance your experience in X-Plane 11;
Active Air Effects: Replaces internal X-Plane turbulence and air effects, providing enhanced turbulence, drafts, thermals, terrain-based wind effects, surface friction, gusts, variability, wake turbulence, microbursts and more
High-Performance Weather Depiction: Uses internal X-Plane 11.2x/11.3x cloud depiction for maximum performance and smoothness, with multiple weather depiction modes including theme cell “real weather” mode and global static mode – VR compatible and optimized!
Active Sky Weather Engine: An evolved version of the Active Sky platform brings the core features that made Active Sky the leading weather engine for other platforms: Advanced weather synthesis and interpolation, high-resolution global winds aloft, realistic air and atmosphere effects, a comprehensive weather data network, integrated visual mapping and planning, and much, much more
Voice Weather Delivery: Active Sky ATIS and Flightwatch are available at any time by listening on 122.00, 122.02 or 122.03 for closest station, actual/current interpolated conditions and destination weather reports, respectively
Surface Crosswind Attenuation: Optional, for better ground handling in crosswind conditions while preserving headwind/tailwind component for performance accuracy
Mobile Companion App: Use any device/browser to connect with Active Sky over your network and view and control the weather
The price of Active Sky XP is 35.99 EUR (roughly $40USD) and is available from the simMarket.