Weather plays critical role in the performance of AV’s. During heavy rain, fog or snow, most of the current AV’s and ADAS sensors and algorithms function very poorly, if at all. Varying weather forces the AV’s to face new level of problems with can be classified to perception, localization and dynamic control of the vehicles. Sensible 4 has been validating their L4 autonomous system in Arctic open road conditions as the extreme resembles well the most challenging situations for AV. Sensible 4’s solution to the challenge lies within their Lidar data processing combined with sensor fusion, granting additional level of redundancy to system. Their mapping and localization is both highly robust and efficient. It is tolerant to both environment changes and different forms of rain. Yet it runs on fairly low-power CPU. This is further supported by smart sensor fusion used for both mapping and obstacle detection. Sensible 4’s CEO Harri San***ala will present on the topic of eployment and Development of Autonomous Vehicles in Harsh Weather Real-life Operational Conditions.