Module 5: Weather for Remote Pilots
Weather is the single biggest variable a remote pilot manages on every flight, and it is one of the most heavily tested areas on the Part 107 Knowledge Test. This module teaches you to find and read the same aviation weather products manned-aircraft pilots use — METARs, TAFs and graphical forecasts — and to understand exactly how wind, temperature, atmospheric stability, density altitude and visibility affect a small unmanned aircraft's performance and safety margins.
Learning outcomes
- Explain why weather matters more for small drones than for manned aircraft, and identify the weather-related risk factors most relevant to sUAS operations.
- Locate and use the FAA's official aviation weather sources, including Flight Service, the Aviation Weather Center, and approved mobile weather apps.
- Decode a METAR line field by field, including wind, visibility, sky condition, temperature/dew point, and altimeter setting.
- Decode a TAF and explain how a forecast differs from a current observation, including change groups and probability indicators.
- Calculate headwind and crosswind components from reported wind and explain how gusting wind affects small, lightweight drones.
- Describe atmospheric stability, identify turbulence sources, and explain how each affects sUAS control and image/sensor quality.
- Explain the relationship between temperature, dew point and fog formation, and assess fog risk for a planned flight window.
- Calculate density altitude and explain its effect on lift, motor performance, and battery efficiency.
- Recognize the signs of microbursts and wind shear and explain why they are especially dangerous for small aircraft.
- Apply cloud clearance and visibility minimums required under 14 CFR Part 107 to a planned operation.
Every lesson in this module builds toward one practical skill: standing in a launch location, pulling up the current weather picture, and making a sound go/no-go decision before the aircraft ever leaves the ground. The module opens by explaining why weather deserves this much attention for an aircraft that weighs a few pounds and flies close to obstacles and people, then moves into the two skills every remote pilot needs before checking any other weather detail — knowing where official aviation weather information comes from, and being able to read a METAR and a TAF the way the National Weather Service and FAA actually format them, not a simplified paraphrase.
From there the module works through the physical weather factors that most directly affect a small unmanned aircraft: wind and its headwind/crosswind components, atmospheric stability and the turbulence it produces, the temperature/dew point relationship that predicts fog, and density altitude — the single factor most responsible for unexpected performance loss on hot, high-elevation, or humid days. The module closes with two safety-critical topics, microbursts/wind shear and the cloud clearance and visibility minimums in 14 CFR Part 107, that tie directly into ACS Task III.B (Effects of Weather on Performance) and the regulatory material from Module 2.
Three lessons in this module include fully working calculators — a METAR-based wind component calculator, a temperature/dew point spread and fog-risk indicator, and a density altitude calculator — so you can practice the actual math the FAA expects you to be able to do, not just recognize the concept by name.
How weather risk is different — and often greater — for small, lightweight unmanned aircraft than for manned aviation.
Where to get official, current, and forecast aviation weather before every flight.
Decode a real current-conditions report field by field, with a wind component calculator.
Decode a terminal aerodrome forecast and understand change groups and probability language.
Why wind affects a 2-pound quadcopter very differently than a Cessna, and what to watch for.
Stable vs. unstable air, common turbulence sources, and their effect on flight control and footage.
Predicting fog risk from the temperature/dew point spread, with a fog-risk calculator.
The single biggest hidden performance thief on hot or high-elevation flights, with a calculator.
Recognizing the warning signs of sudden, severe wind events near thunderstorms.
Applying 14 CFR 107.51's cloud clearance and visibility requirements to a real flight plan.