Weather
The single largest cause of delay and cancellation worldwide.
Weather — the global index
The same reading community.wfmlabs.com shows for this domain. Presentation differs; the number does not.
Top-scoring event: [Santa Clarita, California] weather 6.0 — Los Angeles County firefighters battling 100-acre brush fire near Castaic
Where weather risk sits
The same index, scored per region. Disc size is the score; a hollow ring means the index publishes no reading for that region — which is not an all-clear.
Nothing on this map is red or amber. The op-risk index is a provisional ranking derived from event volume, not an observation of any airport, so it is drawn in one hue with magnitude carried by size. Red and amber are reserved on this surface for things we checked and found impaired — degraded airfields and declared incidents. Regions the index reports no reading for are drawn hollow rather than as a calm NORMAL, because we have nothing and it is fine are different claims.
The 133 metro nodes the taxonomy also carries are not drawn: 133 overlapping discs at world scale is the centroid smear PR#10/#11 taught us about, in a new costume. Named here rather than silently omitted.
The scorecard
Every region with a reading, ranked — and every region without one, named. Both halves are the answer.
The index reports available: false for weather in these scopes — no events were scored there in the current window. It publishes those as score 1 / NORMAL, and this page deliberately does not pass that through: “we have nothing” and “it is fine” are different claims, and rendering the first as the second is the failure this whole surface exists to prevent.
Open weather incidents
Declared, evidence-backed, and the only thing on this page allowed a hazard colour.
No weather incident is open. This is a read of the incidents table, not an absence of monitoring — the index above is still scoring this domain.
Recent weather signals
The raw stream feeding the index above, last 48 hours.