Weather cancels more commercial UAS missions than any other factor. It also causes more incidents than pilots acknowledge — because many of those incidents start with a pilot who looked at a “mostly favorable” forecast and decided to fly, only to encounter conditions in the field that the forecast didn’t predict accurately at their operating altitude and location.
Reading weather for UAS operations requires more than checking a phone app. Here’s a practical framework for commercial operators who need to make defensible, repeatable weather decisions.
What a Consumer Forecast Doesn’t Tell You
Standard weather apps report surface conditions at the nearest reporting station, which may be miles from your site and at a different elevation. They aggregate conditions over broad areas. They don’t tell you:
- Wind speed and direction at 200, 300, or 400 ft AGL at your specific site
- Mechanical turbulence generated by buildings, terrain, or obstacles at your operating altitude
- Thermal activity that varies by surface type and time of day
- Localized precipitation or fog in valleys and low-lying areas
- Wind gradient — how speed and direction change with altitude
A ground-level reading of 8 knots can be 18 knots at 300 ft AGL in certain terrain and atmospheric conditions. Your aircraft is rated for a wind limit — but that limit applies to the wind it’s actually experiencing, not the wind at the surface a mile away.
Better Weather Sources for UAS Operations
Aviation weather services. aviationweather.gov provides METARs, TAFs, winds aloft forecasts, and PIREPs from pilots who’ve actually been in the airspace. Winds aloft forecasts (FB winds) are specifically useful for predicting conditions at UAS operating altitudes.
UAV-specific weather services. Tools like UAV Forecast, Windy, and dedicated drone weather apps aggregate multiple weather models and present them in pilot-friendly formats. FlightDeck integrates with OpenWeatherMap to pull current conditions and 5-day forecasts for every site in your project automatically.
On-site observation. Arrive early. Watch the site for 10–15 minutes before launch. Watch smoke, dust, flags, tree movement, and cloud base. The site tells you things no forecast does.
Setting Personal Minimums
Part 107 doesn’t specify weather minimums for most operations (beyond 3 SM visibility and cloud clearance requirements). That means you need to set your own. Personal minimums are specific, pre-established limits that define the conditions under which you’ll fly.
For a standard multi-rotor payload operation, a conservative personal minimums set might look like:
- Surface wind: below 15 kts sustained, gusts below 20 kts
- Visibility: 5 SM or greater
- Cloud ceiling: 1,000 ft AGL minimum, 1,500 ft preferred
- No precipitation of any type
- Temperature: above manufacturer minimum operating temperature
- No nearby lightning within 10 SM
These are examples. Your limits should reflect your platform’s actual tested performance, your payload, your site type, and your operational risk tolerance. Write them down. Apply them consistently. Don’t negotiate with yourself on site.
Weather Delays and Rescheduling
Professional clients understand weather holds. What they don’t understand is a pilot who didn’t communicate early. If weather is trending unfavorable, notify your client 24 hours in advance — not the morning of, and certainly not after you’ve driven to the site.
For teams managing large site lists, tracking weather across dozens of locations manually is untenable. FlightDeck’s Weather Delay Tool lets you advance all un-flown site forecast dates by a specified number of days with a single click — automatically skipping LAANC-authorized sites that have fixed authorization windows.
Every remaining site in your project gets a color-coded 5-day weather forecast automatically: green for clear, red for rain, blue for snow, gray for overcast. You see your entire project’s weather picture in one view, every morning before deployment.
Download the free 30-day trial and bring weather intelligence into your daily operations workflow.