The use of unmanned aircraft systems (UAS) or drones has exploded in the last decade, and the primary driver of this growth is the amazing utility in applications as diverse as package deliveries, search-and-rescue, agriculture, surveillance, 3D mapping, video production, and much more. But weather is the greatest impediment to the safe and successful operations for drones. This white paper from Intellisense Systems looks at opportunities and solutions to close gaps in environmental sensing to ensure the safety and efficacy of UAS and drone applications.