In recent days, Hong Kong Observatory has extended weather forecast from 7 days to 9 days. According to Cheng Cho-ming, Assistant Director of Hong Kong Observatory, the accuracy of weather forecast would reduce with the extension of the forecasting days. Currently, the mean accuracy rate of their 1 to 3-day forecast is 90%, 4 to 7-day forecast, 85% and the new 8 to 9-day forecast, 80%.
Cheng said that although the accuracy rate of 8 to 9-day forecast was lower than the forecast before 7 days, it marked that Hong Kong Observatory has developed and promoted the weather forecasting quality with the extension of forecast days. The goal was to meet the needs of local residents. They could get weather forecast earlier, make preparations for activities and take measures for preventing disastrous weather.
According to Mr. Chun Chi-ming, Director of Hong Kong Observatory, local people could check weather forecast of the coming 9 days from the website of the observatory.
Cheng introduced that their observatory produced the 9-days forecast based on the numerical forecasting model operated by the high-performance computer of Hong Kong Observatory and the models of other international organizations.
The observatory considers many weather factors including weather, wind direction, wind speed, temperature and humidity to take objective verification. The accuracy may be different in weather systems of different seasons.
Editor Kong Yan