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

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Bulletin issued at 01:02 HKT 25/Apr/2017

At 1 a.m. at the Hong Kong Observatory the air temperature was 21 degrees Celsius and the relative humidity 85 per cent.

The air temperatures at other places were:

King's Park 21 degrees;
Wong Chuk Hang 21 degrees;
Ta Kwu Ling 21 degrees;
Lau Fau Shan 21 degrees;
Tai Po 21 degrees;
Sha Tin 21 degrees;
Tuen Mun 21 degrees;
Tseung Kwan O 20 degrees;
Sai Kung 21 degrees;
Cheung Chau 21 degrees;
Chek Lap Kok 22 degrees;
Tsing Yi 22 degrees;
Shek Kong 22 degrees;
Tsuen Wan Ho Koon 20 degrees;
Tsuen Wan Shing Mun Valley 21 degrees;
Hong Kong Park 21 degrees;
Shau Kei Wan 21 degrees;
Kowloon City 21 degrees;
Happy Valley 21 degrees;
Wong Tai Sin 21 degrees;
Stanley 21 degrees;
Kwun Tong 21 degrees;
Sham Shui Po 22 degrees;
Kai Tak Runway Park 22 degrees;
Yuen Long Park 21 degrees;
Tai Mei Tuk 20 degrees.


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 00:45 HKT 25/Apr/2017

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

An easterly airstream continued to affect the south China coast yesterday. Locally, it was cloudy with a few showers. An upper-air disturbance is expected to bring thundery showers to the coast of Guangdong today.

Weather forecast for Hong Kong

Cloudy with showers and a few thunderstorms. Temperatures will range between 21 and 25 degrees. Moderate east to southeasterly winds.

Outlook : Still showery in the following couple of days. The weather will improve towards the weekend.


(The above forecast period is valid up to 23:59 HKT today, 25/04/2017; 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 21:00 HKT 24/Apr/2017

N0 WARNING.

GENERAL SITUATION AT 240900 UTC:
AN EASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 241300 UTC:

HONG KONG= 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. TEMP 21-25 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 4-5, BEC SE 4. FINE. SEA UP TO 2 M. SWELL NE UP TO 2 M. =
PARACEL= S TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E UP TO 2 M. =
TONKIN= S TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= S TO SE 4-5. ISOL SHOWERS AND TS. 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 23:30 HKT 24/Apr/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 24 April 2017

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

    Weather Situation:
    An easterly airstream is affecting the south China coastal waters. Meanwhile, unsettled weather is affecting the region.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to southeast force 5 to 6, occasionally force 7 at first.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao:
    East force 5 to 6, occasionally force 7 at first.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas.

    Shanwei and South of Hong Kong:
    East to southeast force 5 to 6, occasionally force 7 at first.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas.

    Shangchuan Dao:
    Southeast force 4 to 5.
    Isolated 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 5 to 6 later. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind east force 4
      Visibility 9 Kilometres

    Shantou Wind east-southeast force 2
      Visibility 9 Kilometres

    Dongsha Wind east-northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind east-northeast force 6

    Macau Wind east force 3
      Visibility 7 Kilometres

    Xisha Wind east-northeast force 1
      Visibility 21 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
  • Tidal Information

    • WEATHER FORECAST FOR LOCAL AVIATION
    Traditional Chinese Simplified Chinese

    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 25/APR/2017
    (Next update at 9:00-9:30 HKT 25/APR/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB. 
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  100/10-15
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  080/20-25                            20-23
   B.   2000 FT:  100/15-20                            17
   C.   5000 FT:  220/15                               15
   D.  10000 FT:  270/15                               9
   E.  18000 FT:  230/20                               MS6
   F.  24000 FT:  280/20                               MS17
   G.  30000 FT:  290/35                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2000 - 2600 FT
   I. WEATHER       : 
      CLOUDY WITH A FEW SHOWERS. A FEW ISOLATED
      THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT SCT 3500 FT BKN 8000 FT TEMPO FEW
      CB 1000 FT SCT 2000 FT BKN 4000 FT
   K. VISIBILITY    : 7 KM. TEMPO 3500 M IN SHOWERS. TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 14500 FT      10 DEG. C LEVEL(S) : 9600 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS AND OFFSHORE. MOD NEAR HILLS
   N. SEA STATE     : 3.0-4.0 M     SEA TEMPERATURE    : 23 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE  EAST TO SOUTHEASTERLY WINDS. 
     CLOUDY WITH SHOWERS AND A FEW 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
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    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 23:45 HKT on 24 Apr 17

    VHHK SIGMET 3 VALID 241145/241545 VHHH- VHHK HONG KONG FIR EMBD TS FCST S OF N2130 AND W OF E11330 TOP FL380 MOV E 05KT NC= VHHK SIGMET 5 VALID 241545/241945 VHHH- VHHK HONG KONG FIR EMBD TS FCST N OF N1900 AND S OF N2200 AND W OF E11330 TOP FL350 MOV E 05KT WKN=

    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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