Weather, NOTAMs and data sources

Go/No-Go draws on official aviation weather — observations (METAR), terminal forecasts (TAF), area and model products and winds aloft — the FAA NOTAM service, FAA airport, runway and airspace data, published instrument approach charts, and terrain and obstacle data.

Coverage is United States airspace today.

Every piece of data is labelled. Something fetched just now says so; anything reused says Cached with its age in plain words. You are never shown stale information dressed as current, and the report carries a data-timestamp summary explaining how far your departure sits from the newest observation.

The report names the source that was unavailable and the effect on the analysis, rather than silently omitting it. If enough is missing to make an honest verdict impossible, the result reads insufficient data instead of guessing.

Background checks run against every outside feed continuously and alert us when one stops answering, so an outage is noticed and chased rather than quietly degrading reports.

NOTAMs are matched against your actual flight window with a margin around departure and arrival. A closure that falls inside that window is raised even when it sits outside the airport's normal published schedule — a schedule quoted inside a notice's free text can never be used to dismiss the notice itself.

Less is more. A notice is mentioned only if it changes what you do on this flight: a runway closure, lights out for a night arrival, a TFR, an unlit tall obstacle near your route. Anything already on the ATIS or in the chart supplement — taxiway paint, construction away from the runway, frequency changes — is left out, and so are notices that don't apply to your aircraft, such as arresting cables used only by military jets (unless the notice also closes the runway).

Landing Zone Surveys use OpenStreetMap for mapped power lines, towers and poles, Esri satellite imagery for the map and the image read, and elevation data for slope and contours. None of these are aviation-certified, and none can prove a wire isn't there.

Weather and NOTAMs are published in Zulu (UTC). Log Scan Pro shows both: local time for planning, Zulu alongside so it matches the source, and the destination airport's time zone named explicitly.

The data here supports your decision making. Official sources and your own preflight briefing remain your authority for the flight.