Observed Wind Verification Share
Share of events meeting this project's observational checks across eight reference stations.
HKO Signal 8 Transparency Portal
Explore how Hong Kong's Signal 8 warnings compare with observed winds, making the timing of warning decisions easier to understand.
Historical snapshot: 11 typhoons, 2022–2025. This student project applies its own observational checks; an unverified event does not establish that an official warning was unnecessary. Data does not update automatically.
Signal 8 vs Sustained Gale Timing
Minutes between HKO’s Signal 8 issuance and when sustained gale-force winds were actually observed.
Bars only appear when sustained winds were verified. Positive = issued before gales; negative = issued after.
Injuries vs Signal Timing
Comparing recorded injuries against early warning minutes (HKO issuance vs sustained winds).
Only events with verified sustained winds appear.
Vessel Impact vs Signal Timing
Total damaged/destroyed/shipwrecked vessels plotted against early warning minutes.
Only events with verified sustained winds appear.
Reference Station Timeline
Number of reference stations with ≥63 km/h 10-minute winds (T8 threshold = 4 stations).
Markers show HKO’s Signal 8 issuance (blue) and the algorithm’s first detection of sustained gales (magenta).