Aviation Weather Map
SIGMETs, G-AIRMETs, freezing levels, pilot reports, and station flight categories — over the FAA's own sectional and enroute charts. Filter it all by the altitude you plan to fly.
What is on the map
Four layers, each toggled separately. SIGMETs are the serious ones: convective areas, severe turbulence, severe icing, volcanic ash, and dust or sandstorms, drawn with the Aviation Weather Center's own legend colours so they look the way you already expect. G-AIRMETs cover the lesser but far more common hazards — IFR conditions, mountain obscuration, moderate turbulence split high and low, icing, and low-level wind shear. Freezing levels are drawn as lines with their altitude, because a freezing level is a surface rather than a volume. Pilot reports are the last ninety minutes of what aircrew actually found up there, coloured by severity, with urgent reports picked out.
Station flight categories are a fifth, optional layer: a coloured dot for every US reporting station, green through magenta for VFR, MVFR, IFR, and LIFR. It stays off until you ask for it because it needs the whole national observation file — about 230 KB — and the map is useful without it.
Filtering by altitude
This is the part a plan-view map usually cannot answer. Nearly every decision a pilot makes about weather is really a decision about altitude: whether the ice is below you, whether it is smoother higher, whether you can get on top. Pick an altitude and the map keeps only the advisories whose band contains it, and the pilot reports made within 2,000 ft of it. Out-of-band reports fade rather than disappear, so you can still see where a layer sits relative to where you are going.
Most G-AIRMETs never publish a floor and a ceiling. Where levels are missing they are inferred from the hazard, and those bands are labelled as inferred — a stated FL300 to FL410 should never look like a guess. Freezing levels are exempt from the filter entirely.
Charts underneath
The basemap picker carries the FAA VFR sectional and the IFR low and high enroute charts, drawn straight from the FAA's tile service, alongside plain road, terrain, and satellite. The charts are US only and appear at the zoom levels they are published for. Nothing here needs an account or an API key.
What this map does not show
No NOTAMs, no TFRs, no radar or satellite imagery, and no terrain or obstacle data. It shows hazard advisories and reports, and it shows them as the issuing products describe them. It is an advisory planning picture, not an official briefing: brief and file through official channels. For a vertical slice along a specific route rather than a view from above, use the flight planner, which draws the same weather as a cross-section against the altitudes you are considering.
FAQ
Where does the weather come from?
The Aviation Weather Center. SIGMETs and G-AIRMETs refresh every five minutes, pilot reports every five minutes, and station observations every minute. SkyReady ingests the national files and serves them from its own cache, so the map is reading the same products a briefer would.
What does the altitude filter do?
It shows only the advisories whose altitude band contains the altitude you picked, and pilot reports within 2,000 ft of it. Advisories that state no levels have a band inferred from the hazard type, and those are labelled. Freezing levels always show, because they are the product an altitude choice most depends on.
Why are some altitude bands marked as inferred?
Most G-AIRMETs do not publish a floor and ceiling. When levels are missing, the band is filled in from the hazard — surface to 10,000 ft for IFR and mountain obscuration, the FL180 split for turbulence — and marked so you can tell a stated band from a filled-in one.
Can I see a sectional?
Yes. The basemap picker includes the FAA VFR sectional and the IFR low and high enroute charts, served from the FAA’s own tile service. They cover the US only and are drawn at the zoom levels the charts are published for.
Is this an official weather briefing?
No. It is an advisory picture for planning. It does not include NOTAMs or TFRs, and it is not a substitute for an official briefing through 1800wxbrief.com or your EFB.
The calculator is just the start
These same calculations power the SkyReady app — alongside an offline-first logbook, automatic FAA currency, proficiency scoring, and a one-tap Go/No-Go readiness brief. Free to log.