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What the picker changes
  • Top topics digest — the cards score the selected period against the prior 4 weeks.
  • 12-week heatmap & outlet matrix — show the 12 weeks ending at the selected week (they slide back with the picker, they aren’t a fixed snapshot).
  • Per-topic volume / alias drift — same 12-week trailing window, anchored on the selected period.
  • Coverage gap quadrant — scores the selected period against the 12 weeks before it (not including it).
  • Anomaly cards — only show alerts the detector fired during the selected period. Quiet weeks legitimately show none.
What stays as-is
  • Outlet orientation strip / lean colours — context-only, drawn from the last 12 weeks of activity regardless.
  • Co-occurrence graph — recent-activity anchored, not picker-driven.
  • Source & topic profiles — all-time data for the topic; the picker doesn’t affect them.
Rolling 7 days is a sliding live window for “current vibes”; switch to Weekly to compare specific weeks side-by-side.
Weekly Rolling 7 days
live window
Press topic

Radiation Fog Formation

1 articles · 1 aliases in press · peaked week of 19 Jul 2026 · first seen 23 Jul 2026

a type of fog that forms overnight when moist air cools rapidly on clear, still nights due to radiative heat loss

The stories behind this signal

across press, releases & commentary · links open at the source
News Explainer: Why fog is worse in winter and why it keeps causing flight delays RNZ · 22 JulRead ↗

Sample framings

Up to 12 framings across outlets and orientations — each a short phrase the extractor generated to characterise the piece's editorial angle (not a quote). Filter by lean to see how each bloc is spinning the story; click through to read the original.

rnz Centre

caused by ground-level cooling at night

Explainer: Why fog is worse in winter and why it keeps causing flight delays
22 Jul

Coverage by outlet lean Methodology →

Stacked weekly counts; colour by editorial lean. Stuff and The Spinoff lean centre-left, NZ Herald centre-right, others centre.

Alias drift

How press outlets have named this topic, week by week.

Free account Create a free account to watch this topic — get alerted when framing shifts, when an MP adopts new language, or when discourse and press diverge. Create a free account Log in

Recent headlines

Most recent 1 articles linking to this topic.

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