The Hong Kong Observatory launched a new trial service of “Mean-sea-level Pressure” extended forecast on the Extended Outlook (Beta version) webpage today (30 July 2019). Displaying the probability forecast of mean-sea-level pressure (hereafter pressure) for the next 14 days as a time series chart, the new service allows the public to easily keep track of the pressure evolution trend and make necessary preparation at the earliest instance possible. In general, pressure will fall significantly when a tropical cyclone moves close. When an intense cold surge affects Hong Kong the pressure will rise considerably.
Members of the public can access the “Mean-sea-level Pressure” extended forecast from the Observatory’s homepage, or via the following link:
The “Mean-sea-level Pressure” extended forecast chart will also be added to “MyObservatory” mobile app later.
Two cases of using “Mean-sea-level Pressure” extended forecast are given below: