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Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

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Weather Information for South China Coastal Waters

Bulletin issued at 18:11 HKT 25/Apr/2017

At 6 p.m. at the Hong Kong Observatory the air temperature was 22 degrees Celsius and the relative humidity 97 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.0. The intensity of UV radiation was low.

An area of thundery showers over the Pearl River Estuary is moving eastwards, and may affect Hong Kong in the next couple of hours. Members of the public should be on the alert.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 7:30 p.m. today. Isolated squally thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

King's Park 22 degrees;
Wong Chuk Hang 23 degrees;
Ta Kwu Ling 22 degrees;
Lau Fau Shan 22 degrees;
Tai Po 21 degrees;
Sha Tin 22 degrees;
Tuen Mun 23 degrees;
Tseung Kwan O 21 degrees;
Sai Kung 22 degrees;
Cheung Chau 22 degrees;
Chek Lap Kok 24 degrees;
Tsing Yi 22 degrees;
Shek Kong 24 degrees;
Tsuen Wan Ho Koon 22 degrees;
Tsuen Wan Shing Mun Valley 22 degrees;
Hong Kong Park 23 degrees;
Shau Kei Wan 22 degrees;
Kowloon City 22 degrees;
Happy Valley 23 degrees;
Wong Tai Sin 22 degrees;
Stanley 22 degrees;
Kwun Tong 22 degrees;
Sham Shui Po 23 degrees;
Kai Tak Runway Park 22 degrees;
Yuen Long Park 23 degrees;
Tai Mei Tuk 21 degrees.

Between 4:45 and 5:45 p.m., the rainfall recorded in various regions were:

Sai Kung 0 to 15 mm;
Islands District 3 to 10 mm;
Tuen Mun 5 to 8 mm;
Southern District 4 to 6 mm;
Yuen Long 0 to 5 mm;
Tsuen Wan 2 to 5 mm;
Eastern District 3 to 4 mm;
Wan Chai 3 to 4 mm;
Central & Western District 3 to 4 mm;
Sha Tin 0 to 3 mm;
Kwai Tsing 2 to 3 mm;
Tai Po 0 to 3 mm;
Yau Tsim Mong 2 to 3 mm;
Sham Shui Po 3 mm;
Kowloon City 2 to 3 mm;
Wong Tai Sin 1 to 3 mm;
Kwun Tong 2 to 3 mm;
North District 0 to 1 mm.


Note: The data above is provisional. Only limited data validation has been carried out.


Climatological Information for 25 Apr

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Local Weather Forecast

Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

Current Weather | Regional Temperature Forecast in HK |  9-day Weather Forecast
UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 17:45 HKT 25/Apr/2017

Here is the latest weather bulletin issued by the Hong Kong Observatory.

The area of thundery showers associated with an upper-air disturbance is affecting the vicinity of Pearl River Estuary. Locally, a few millimetres of rainfall were generally recorded over the territory, and rainfall even exceeded 10 millimetres over Lantau Island and southern part of the Hong Kong Island in the afternoon.

At 4 p.m., the tropical depression over the seas east of the Philippines was centred about 420 kilometres northwest of Yap. It is forecast to move west-northwest at about 18 kilometres per hour across the western North Pacific.

Weather forecast for tonight and tomorrow

Mainly cloudy with showers and isolated squally thunderstorms. Showers will be heavy at times at first. Temperatures will range between 22 and 27 degrees. Moderate to fresh east to southeasterly winds, occasionally strong on high ground at first.

Outlook : Still showery on Thursday. The weather will improve in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 26/04/2017; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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MARINE FORECAST
Traditional Chinese Simplified Chinese

Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 25/Apr/2017

N0 WARNING.

GENERAL SITUATION AT 242100 UTC:
AN EASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 250100 UTC:

HONG KONG= E TO SE 5-6, OCNL 7 AT FIRST. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. DOWN TO 4000 M IN MIST AND RAIN PATCHES LATER. SEA 2-3 M, UP TO 4 M AT FIRST. TEMP 24-23 C. =
KWANGTUNG= E TO SE 5-6, OCNL 7 AT FIRST. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 4 M AT FIRST. SWELL E UP TO 2 M. =
TAIWAN STRAIT= E TO NE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. SWELL NE 2 M. =
BASHI= E TO SE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL E 2 M. =
PRATAS= E TO SE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL E 2 M. =
BALINTANG= E TO SE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL E 2 M. =
SCARBOROUGH= E TO SE 4-5. FINE. SEA UP TO 2 M. =
PARACEL= S TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
TONKIN= S 4-5. DOWN TO 4000 M IN MIST AND RAIN PATCHES. SEA UP TO 2 M. =
DANANG= S 4-5. DOWN TO 4000 M IN MIST AND RAIN PATCHES. SEA UP TO 2 M. =
NNNN
Abbreviations:
KT, VRB, SLW, FRQ - knot, variable, slow, frequent STNR, QSTNR, C - stationary, quasi-stationary, degrees celsius WKN, INTSF, INTST, NC - weaken, intensify, intensity, no change LGT, ISOL, SCT, OCNL - light, isolated, scattered, occasional CLD, DZ, TS - cloudy, drizzle, thunderstorm

The date and time are specified by a 6-digit number DDHHMM. DD stands for the day of month, HH represents the hour while MM indicates the minute in UTC.


  • Map showing the 10 forecast areas
  • Tidal Information

    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

    Current Weather | Local Weather Forecast | Regional Temperature Forecast in HK
    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 16:30 HKT 25/Apr/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 4:30 p.m. on 25 April 2017

    Warnings:
    Strong winds in Hong Kong adjacent waters, Nan'ao, Shanwei and south of Hong Kong.

    Weather Situation:
    The area of thundery showers associated with an upper-air disturbance is affecting the vicinity of Pearl River Estuary.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to southeast force 5 to 6, becoming southwest force 4 to 5 later.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao and Shanwei:
    East to southeast force 5 to 6, becoming southwest force 4 to 5 later.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas.

    South of Hong Kong:
    East to southeast force 5 to 6, becoming southwest force 4 to 5 later.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

    Shangchuan Dao:
    South to southeast force 4 to 5.
    Scattered squally showers and thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    South to southwesterly winds of force 4 to 5, becoming northeasterly winds of force 6. Isolated squally showers and thunderstorms.

    Latest reports from south China coastal weather stations
    --------------------------------------------------------

    Waglan Island Wind east force 4
      Visibility 1500 Metres

    Shantou Wind east force 1
      Visibility 15 Kilometres in showers

    Huangmaozhou Wind east-southeast force 5

    Macau Wind east-southeast force 2
      Visibility 500 Metres in rain

    Xisha Wind south-southwest force 2
      Visibility 27 Kilometres

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
  • Descriptive Terms of Wind Speeds
  • Visibility Readings in Hong Kong Waters
  • Map showing forecast areas
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    • WEATHER FORECAST FOR LOCAL AVIATION
    Traditional Chinese Simplified Chinese

    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 25/APR/2017
    (Next update at 01:30 HKT 26/APR/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS, SEV TURB AND SEV GUSTS. 
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE AREA OF THUNDERY SHOWERS ASSOCIATED WITH AN
     UPPER-AIR DISTURBANCE IS AFFECTING THE VICINITY
     OF PEARL RIVER ESTUARY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  110/10,15-20 AT FIRST
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  100/20-25
                  BEC 180/10-15                        24-21
   B.   2000 FT:  120/20-25G35
                  BEC 200/15                           20
   C.   5000 FT:  200/20                               17
   D.  10000 FT:  240/25                               8
   E.  18000 FT:  250/25                               MS6
   F.  24000 FT:  260/30                               MS16
   G.  30000 FT:  260/35                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH SHOWERS AND ISOLATED SQUALLY
      THUNDERSTORMS. LOCALISED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT SCT 2500 FT BKN 6000 FT 
      TEMPO FEW CB 1000 FT SCT 2000 FT BKN 4000 FT.
   K. VISIBILITY    : 7 KM. TEMPO 3000 M IN SHOWERS/MIST.
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 9000 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 2.5-4.0 M     SEA TEMPERATURE    : 22 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EAST TO SOUTHEASTERLY WINDS.  
     MAINLY CLOUDY WITH SHOWERS AND ISOLATED
     THUNDERSTORMS.=

    ===================================================================
Note: The forecast could be updated before the next issue time 
whenever there is newly expected occurrence or non-occurrence 
of significant weather as described below which may be hazardous 
to aircraft within 100-km radius of Hong Kong:

(a) Change of the tropical cyclone category
(b) Strong, Gale, Storm, and Hurricane force winds
(c) Thunderstorm/CBs
(d) Severe gusts
(e) Severe turbulence
(f) Significant low stratus
(g) Fog or thick haze/sandstorm/duststorm 
    causing significant reduction of visibility
(h) Volcanic ash
(i) Radioactive cloud
===================================================================
    Aviation Weather Observation and Forecast Information for Hong Kong International Airport
    To know more about clouds, please see Commonly observed clouds in Hong Kong.

    sigmet
    Traditional Chinese Simplified Chinese

    Significant Weather Information (SIGMET)

    The Airport Meteorological Office is responsible for monitoring hazardous weather and phenomena in the atmosphere that may affect the safety of aircraft operations within a designated airspace over the northern part of the South China Sea. Weather forecasters at the Airport Meteorological Office issues SIGMET information when hazardous weather and phenomena in the atmosphere such as thunderstorms, tropical cyclones, turbulence, icing occur or are expected to occur in the airspace.

    The latest significant weather information
    issued by the Hong Kong Observatory at 14:50 HKT on 25 Apr 17

    VHHK SIGMET 1 VALID 250250/250650 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1936 E11130 - N2124 E11130 - N2230 E11342 - N2236 E11400 - N2018 E11400 - N1936 E11130 TOP FL380 MOV NE 05KT NC= VHHK SIGMET 2 VALID 250650/251050 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1906 E11154 - N1930 E11130 - N2124 E11130 - N2230 E11342 - N2312 E11554 - N2030 E11536 - N1906 E11154 TOP FL380 MOV NE 05KT NC=

    Please click here for more about the SIGMET

    Tropical Cyclone Warning
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    Tropical Cyclone Warning

    There is no tropical cyclone warning signal.

    For other tropical cyclone related information, please visit the World Meteorological Organization Web Site - Severe Weather Information Centre.

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    TROPICAL CYCLONE WARNING FOR SHIPPING
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    Tropical Cyclone Warning for Shipping

    There is no tropical cyclone warning for shipping*.




    *Tropical cyclone warnings for shipping are issued by the Hong Kong Observatory for tropical cyclones located within the area bounded by 105E and 125E , 10N and 30N.




    For other tropical cyclone related information, please visit the World Meteorological Organization Web Site - Severe Weather Information Centre.

    YESTERDAY'S WEATHER AND RADIATION LEVEL Skip to main content
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    Yesterday's Weather and Radiation Level

    Bulletin issued at 00:15 HKT 25/Apr/2017 
    HKO Readings & Radiation Level

Yesterday's Weather and Radiation Level:
------------------------------------------------------

Hong Kong Observatory
Maximum Air Temperature                     22.8 C
Minimum Air Temperature                     20.9 C
Grass Minimum Temperature                   21.0 C
Relative Humidity                        79 - 87 Percent
Rainfall                                      Trace 
Total rainfall since 1st January           117.2 mm
Against an average of                      304.1 mm

Other Stations                Min                  Max
King's Park                  20.4 C               23.2 C
Wong Chuk Hang               20.5 C               22.6 C
Ta Kwu Ling                  19.5 C               23.4 C
Lau Fau Shan                 18.9 C               24.6 C
Tai Po                       19.5 C               21.8 C
Sha Tin                      19.9 C               22.5 C
Tuen Mun                     19.6 C               23.5 C
Tseung Kwan O                19.4 C               21.5 C
Sai Kung                     20.3 C               21.7 C
Cheung Chau                  20.1 C               22.0 C
Chek Lap Kok                 21.1 C               24.7 C
Tsing Yi                     20.3 C               23.8 C
Shek Kong                    19.6 C               24.1 C
Tsuen Wan Ho Koon            19.1 C               22.9 C
Tsuen Wan Shing Mun Valley   20.1 C               23.0 C
Hong Kong Park               20.5 C               22.1 C
Shau Kei Wan                 20.0 C               21.4 C
Kowloon City                 20.0 C               22.6 C
Happy Valley                 20.9 C               23.2 C
Wong Tai Sin                 20.5 C               23.4 C
Stanley                      20.8 C               21.9 C
Kwun Tong                    20.4 C               21.8 C
Sham Shui Po                 20.2 C               24.6 C
Kai Tak Runway Park          21.0 C               22.2 C
Yuen Long Park               19.2 C               24.4 C
Tai Mei Tuk               19.3 C               21.9 C

Duration of sunshine (King's Park):              0.1 H
The mean UV index recorded at King's Park yesterday was 2,
the UV intensity was Low.
The maximum UV index for yesterday was 4.
 

Yesterday's (24 Apr 2017) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 to
0.15 microsievert per hour.  These are within the normal
range of fluctuation of the background radiation level in
Hong Kong (see Note). The average dose rates measured at the
radiation monitoring stations over various parts of the
territory were as follows :

Station                     Yesterday's average
                            (microsievert/hour)
Ping Chau                           0.08
Tap Mun                             0.09
Kat O                               0.10
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.12
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.15

Note

      

    1. From readings taken at various locations in Hong Kong during
the period 1987-2016, the background ambient gamma radiation
levels may vary between 0.06 and 0.30 microsievert per hour.

    2. The extent of health effects to a person as a result of
exposure to radiation is expressed by a physical quantity
called equivalent dose, in unit of sievert.  Protective
action may be required if there is an increase in the
ambient gamma dose rate above background such that the total
additional dose is expected to exceed 5000 microsieverts in
a relatively short period of time. For example, a dose of
5000 microsieverts may be reached when the ambient gamma
dose rate is 1000 microsieverts per hour (several thousand
times above background) and lasts for 5 hours.

    3. The readings of ambient gamma radiation level from
instrument are expressed in unit of gray, which is
numerically equal to the gamma dose expressed in sievert.
    Climatological Information for 24 Apr
     2003copy right image | Important notices | Privacy policy Last revision date: <25 Apr 2017> 

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