Criteria of very hot day: daily maximum temperature higher than or equal to 33.0 degrees C, Criteria of hot night: daily minimum temperature higher than or equal to 28.0 degrees C, Criteria of cold day: daily minimum temperature lower than or equal to 12.0 degrees C. Click here to jump to the Regional Options, the region climate information can be obtained by clicking the selected region. The former provides hourly forecasts from noon the same day to midnight on the ninth day. Provide regional Weather in Hong Kong - the maximum and minimum air temperature from 1-minute mean temperatures since midnight (the data provided is provisional) Add All to Queue . The observer reads the station-level pressure from the barometer and then computes the mean sea-level pressure using additional information, including station height and air temperature. A red lightning icon indicates lightning within 10 km, while an amber icon indicates lightning within 15 km. In Hong Kong, weather observations are made at the Hong Kong Observatory Headquarters in Tsim Sha Tsui and the meteorological station inside the Hong Kong International Airport. DATA RESOURCES 3. Although observations are mainly taken within the last 10 minutes of the hour, the observer needs to pay attention to the weather situation round the clock and record any significant changes (e.g. The Automatic Regional Weather Forecast (ARWF) website provides the following products in the form of time series and animations: hourly forecasts of air temperature, relative humidity and wind direction and speed for the next nine days at several stations in Hong Kong and a total of 240 grid boxes over the Pearl River Delta Region; The Automatic Regional Weather Forecast (ARWF) website provides the following products in the form of time series and animations: hourly forecasts of air temperature, relative humidity and wind direction and speed for the next nine days at several stations in Hong Kong and a total of 240 grid boxes over the Pearl River Delta Region; 3-hourly forecasts of the weather icons for the stations in Hong Kong, as well as an overview of the state-of-sky for each day over the next nine days; daily forecasts of the probability of precipitation at the stations in Hong Kong for the next nine days; rainfall nowcast for the next two hours over Hong Kong and the Pearl River Delta Region; and, lightning nowcast for the next hour over Hong Kong and the Pearl River Delta Region. Need more help on usage of DATA.GOV.HK? The observer takes the mean wind direction and speed, as well as the maximum gust recorded within the observation period. A total of 16 forecast distribution maps of 30-minute rainfall accumulation will be disseminated in every update to show the corresponding evolution in 6-minute steps. Users can also toggle between station view and grid view of the forecast map by clicking on the “Station/Grid” button located in the top right corner of the map. Regional Weather in Hong Kong - the latest 10-minute mean visibility. The Hong Kong Observatory is a government department responsible for monitoring and forecasting weather, as well as issuing warnings on weather-related hazards. The forecast accuracy is lower for the second 30-minute period. The areal coverage of the product is from 21.328 to 23.487 degrees North and 112.956 to 115.291 degrees East (i.e. Due to difference in the date of first operation for various regional automatic weather stations, the periods for computing climatological normals for different regions are not identical. Such records are relevant to specific locations only and are different from the above-mentioned forecast rainfall over a gird box (which are essential areal averages). Where are the weather observations carried out. Observations on several meteorological elements are made during this period, and a short account of each is given below: The observers is required to record the amount of clouds, the types of clouds and the heights of different cloud layers. https://data.weather.gov.hk/weatherAPI/doc/HKO_Open_Data_API_Documentation.pdf, Regional Weather in Hong Kong - the latest 10-minute mean visibility (English), Regional Weather in Hong Kong - the latest 10-minute mean visibility (Traditional Chinese), Regional Weather in Hong Kong - the latest 10-minute mean visibility (Simplified Chinese), Regional Weather in Hong Kong - the latest 10-minute mean visibility. Update Frequency: 10 minutes. This global web site presents OFFICIAL weather forecasts and climatological information for selected cities supplied by National Meteorological & Hydrological Services worldwide.

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