Aviation Weather Sources & Effects
Small unmanned aircraft are uniquely vulnerable to weather because they fly low, slow, and with far less power margin than manned aircraft — making accurate preflight weather assessment a genuine safety requirement, not a formality. The Part 107 knowledge test expects you to recognize authoritative weather products like METARs, TAFs, and winds-aloft forecasts, and to understand how phenomena such as density altitude, turbulence, and low visibility directly affect sUAS controllability and legal flight conditions. Work through our 15 in-depth, ACS-aligned aviation weather sources & effects articles below, or return to the Part 107 (Drone) library.
METARs and TAFs for sUAS Operations
METARs and TAFs are the FAA's standard aviation weather reports and forecasts that Part 107 remote pilots must understand to make safe, legal pre-flight and in-flight weather decisions for sUAS operations.
Sectional Chart Weather Symbology for Remote Pilots
Learn how to read weather-related symbols on sectional aeronautical charts — including TFRs, restricted areas, and weather station markers — as a Part 107 remote pilot.
Surface Analysis Charts and Their Use in UAS Pre-Flight Planning
Surface analysis charts depict current weather conditions across a broad area, helping Part 107 remote pilots identify pressure systems, fronts, and wind patterns that directly affect safe UAS operations.
Convective Activity and Thunderstorm Avoidance for Drone Pilots
Thunderstorms and convective activity pose extreme hazards to drone operations; this article explains how they form, why they matter for UAS pilots, and how to identify and avoid them using FAA-approved weather sources.
Density Altitude Effects on Small Unmanned Aircraft Performance
Density altitude measures the air's effective thickness for flight performance — the higher it climbs above standard, the harder small UAS motors, props, and batteries must work, risking reduced climb, control, and payload capacity.
Winds Aloft Forecasts (FB Winds) and Drone Flight Planning
Winds Aloft Forecasts (FB) give remote pilots predicted wind speed, direction, and temperature at altitude, enabling smarter drone flight planning, battery management, and risk mitigation.
Fog Types and Visibility Hazards for sUAS Operations
Fog can reduce visibility to near zero in minutes, grounding sUAS operations and creating serious safety hazards. Understanding the five main fog types helps remote pilots anticipate and avoid dangerous low-visibility conditions.
Icing Conditions and Remote Pilot Decision-Making
Ice accumulation on a small UAS poses severe and rapid performance risks; Part 107 remote pilots must recognize icing conditions, interpret weather products, and make conservative go/no-go decisions before every flight.
Graphical Forecasts for Aviation (GFA) and UAS Mission Planning
The Graphical Forecasts for Aviation (GFA) tool replaces legacy Terminal Aerodrome Forecasts for most UAS mission planning, offering interactive, map-based weather depictions that help remote pilots assess conditions across an entire flight area at a glance.
Aviation Routine Weather Report (METAR) Decoding for Part 107
METARs are the primary surface weather observation used by Part 107 remote pilots to assess wind, visibility, cloud cover, and precipitation before and during drone operations.
Wind Shear and Turbulence Hazards at Low Altitudes
Wind shear and turbulence at low altitudes pose serious hazards to sUAS operations, where small aircraft have little energy to recover from sudden airspeed or direction changes.
Weather-Related Go/No-Go Decision Making for Remote Pilots
Remote pilots must evaluate wind, visibility, precipitation, and temperature before every flight; this article explains how to interpret official weather sources and apply a structured go/no-go process under Part 107.
Ceiling and Visibility Limitations for Visual Line-of-Sight Operations
Part 107 remote pilots must understand ceiling and visibility minimums for VLOS drone operations, including how to find, interpret, and apply weather data to stay legal and safe.
Precipitation Effects on Drone Airframe and Sensors
Rain, ice, and other precipitation can rapidly degrade drone airframe integrity, sensor accuracy, and propulsion performance — understanding these effects is essential for safe and legal Part 107 operations.
Weather Minimums Under Part 107 Rules
Part 107 remote pilots must maintain at least 3 statute miles of visibility and remain 500 feet below, 2,000 feet horizontally from clouds — know exactly when a waiver is required and why these limits exist.
More Part 107 (Drone) subjects
Articles are original summaries grounded in the public-domain FAA handbooks and cite their source. ACS-aligned study aids — not a substitute for the official handbooks or regulations.