Operational hazard thresholds
Each day column is a UTC day. Times show in your own time zone (the Time button changes it).
Transient hourly hazards require at least 3 hours in a UTC day (2 hours for freezing rain) so a brief shower does not colour a 24-hour operational window.
How to read this table
- Reference stations: Each conflict zone is anchored at a named ICAO airfield or port so forecasts reflect an operational hub and resolve objectively against archived METAR / SYNOP observations in Verdict.
- Likelihood & impact matrix: Percentages are the share of 82 ensemble members reaching the threshold, paired with their ICD 203 verbal probability term. Stoplight colours follow the UK Met Office likelihood-by-impact matrix.
- Tonight’s illumination: Civil and nautical twilight, lunar disc illumination at local midnight, and hours of low-light darkness (sun below −12° with the moon down or under 25% lit).