Topic
3 reports, newest first.
WeatherDuck cloud inversion articles and forecast evidence from real UK mountain events, including archived forecasts, lead times and independent observations.
Tuesday 22 September 2026 was one of those mornings. From Yr Wyddfa in the north to Pen y Fan in the south, the big Welsh summits sat above a sea of cloud from before dawn until well after breakfast, and WeatherDuck had flagged it from the Sunday evening. Here’s how the morning looked, thanks to…
The last Likely area to hold until morning was 22 July. Here is why late summer goes quiet, what the last two seasons looked like when they opened, and what to do before this one does.
A Lake District cloud inversion filled the valleys below Skiddaw on 12 October 2025. See the atmospheric setup, photographs and practical lessons.
Looking for the evidence trail?
Evidence ledger
Every saved forecast checked against what actually happened, with the lead time, the forecast evolution and the limits kept together in each case.
Browse the forecast checksAnnual report
More than 13,000 archived mornings scored with today’s forecast formula, to show when and where UK cloud inversions are most likely.
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Email alerts tell you when the forecast turns Likely or better for your area, and stand you down if it falls apart overnight.
