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Bulletin issued at 07:02 HKT 26/Apr/2017

At 7 a.m. at the Hong Kong Observatory the air temperature was 23 degrees Celsius and the relative humidity 96 per cent.

The air temperatures at other places were:

King's Park 22 degrees;
Wong Chuk Hang 22 degrees;
Ta Kwu Ling 23 degrees;
Lau Fau Shan 22 degrees;
Tai Po 22 degrees;
Sha Tin 23 degrees;
Tuen Mun 23 degrees;
Tseung Kwan O 22 degrees;
Sai Kung 22 degrees;
Cheung Chau 22 degrees;
Chek Lap Kok 24 degrees;
Tsing Yi 23 degrees;
Shek Kong 23 degrees;
Tsuen Wan Ho Koon 22 degrees;
Tsuen Wan Shing Mun Valley 23 degrees;
Hong Kong Park 25 degrees;
Shau Kei Wan 22 degrees;
Kowloon City 22 degrees;
Happy Valley 23 degrees;
Wong Tai Sin 23 degrees;
Stanley 22 degrees;
Kwun Tong 23 degrees;
Sham Shui Po 23 degrees;
Kai Tak Runway Park 23 degrees;
Yuen Long Park 22 degrees;
Tai Mei Tuk 22 degrees.


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


Climatological Information for 26 Apr

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Local Weather Forecast

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Bulletin updated at 06:45 HKT 26/Apr/2017

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

A humid southeasterly airstream is affecting the coast of Guangdong. Locally, visibility at Waglan Island fell below 1000 metres this morning.

At 5 a.m., the tropical depression over the seas east of the Philippines was centred about 520 kilometres northwest of Yap. It is forecast to move west-northwest at about 16 kilometres per hour across the western North Pacific.

Weather forecast for today

Mainly cloudy with a few showers. Coastal fog in the morning and at night. There will be isolated thunderstorms later. The maximum temperature will be about 26 degrees. Moderate east to southeasterly winds.

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


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

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Marine Weather Information and Forecast

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MARINE FORECAST
Traditional Chinese Simplified Chinese

Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 25/Apr/2017

N0 WARNING.

GENERAL SITUATION AT 250900 UTC:
A SOUTHEASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 251300 UTC:

HONG KONG= SE 5-6, BEC SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. TEMP 22-27 C. =
KWANGTUNG= E TO SE 5-6, BEC SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. =
TAIWAN STRAIT= SE 4-5, NE 6-7 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M, 3-4 M LATER. =
BASHI= SE 5-6, SW 5 LATER. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL E UP TO 2 M. =
PRATAS= E TO SE 5-6, SW 4-5 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. =
BALINTANG= SE 5-6, SW 4-5 LATER. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL E UP TO 2 M. =
SCARBOROUGH= SE 4-5, SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= S 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
TONKIN= S 4-5, NE 5 LATER. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA UP TO 2 M. =
DANANG= S 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 05:30 HKT 26/Apr/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 26 April 2017

    Warnings:
    Fog in Hong Kong adjacent waters.

    Weather Situation:
    A southerly airstream is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Southeast force 5, becoming southwest force 4 to 5.
    Fog patches. Isolated squally showers and thunderstorms later.
    Moderate seas.

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

    South of Hong Kong:
    South to southeast force 5, becoming southwest force 4 to 5.
    Isolated squally showers and thunderstorms.
    Moderate seas.

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

    Outlook for the next 48 hours
    Northeasterly winds of force 6, occasionally force 7. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind east-northeast force 4
      Visibility 1200 Metres

    Shantou Wind east-northeast force 1
      Visibility 6 Kilometres in mist

    Dongsha Wind east-southeast force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind east-northeast force 4

    Macau Wind east-southeast force 1
      Visibility 400 Metres in fog

    Xisha Wind southeast force 2
      Visibility 28 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 26/APR/2017
    (Next update at 9:00-9:30 HKT 26/APR/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     FOG.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE COAST OF
     GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  130/5-10
       OFFSHORE:  110/10, OCNL 15 AT FIRST             23-26
   B.   2000 FT:  180/10-15                            20
   C.   5000 FT:  240/15                               17
   D.  10000 FT:  250/20                               8
   E.  18000 FT:  250/25                               MS6
   F.  24000 FT:  250/25                               MS16
   G.  30000 FT:  260/35                               MS32
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      700 - 1400 FT
   I. WEATHER       : 
      MAINLY CLOUDY WITH SHOWERS. LOCALISED MIST AND
      FOG.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 500 FT SCT 1500 FT BKN 5000 FT
   K. VISIBILITY    : 7 KM. TEMPO 2500 M IN SHOWERS/MIST. TEMPO 600 M IN FOG.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 8800 FT
   M. TURBULENCE    : OCNL MOD
   N. SEA STATE     : 1.0-2.5 M     SEA TEMPERATURE    : 22 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE SOUTHEASTERLY WINDS. CLOUDY
     WITH ISOLATED SHOWERS AND 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 07:40 HKT on 26 Apr 17

    VHHK SIGMET 5 VALID 252340/260340 VHHH- VHHK HONG KONG FIR EMBD TS FCST N OF N2000 AND W OF E11312 TOP FL360 MOV E 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 26/Apr/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     22.9 C
Minimum Air Temperature                     20.7 C
Grass Minimum Temperature                   21.1 C
Relative Humidity                        85 - 98 Percent
Rainfall                                    10.9 mm 
Total rainfall since 1st January           128.1 mm
Against an average of                      308.2 mm

Other Stations                Min                  Max
King's Park                  20.2 C               22.5 C
Wong Chuk Hang               20.5 C               23.3 C
Ta Kwu Ling                  19.7 C               22.7 C
Lau Fau Shan                 19.4 C               23.6 C
Tai Po                       20.2 C               22.2 C
Sha Tin                      20.3 C               23.2 C
Tuen Mun                     20.6 C               23.5 C
Tseung Kwan O                19.9 C               22.2 C
Sai Kung                     20.2 C               22.5 C
Cheung Chau                  20.0 C               22.7 C
Chek Lap Kok                 21.0 C               25.1 C
Tsing Yi                     20.4 C               23.7 C
Shek Kong                    20.3 C               25.4 C
Tsuen Wan Ho Koon            19.7 C               22.3 C
Tsuen Wan Shing Mun Valley   20.5 C               23.2 C
Hong Kong Park               20.1 C               22.9 C
Shau Kei Wan                 20.1 C               22.3 C
Kowloon City                 20.0 C               22.4 C
Happy Valley                 20.8 C               24.1 C
Wong Tai Sin                 20.3 C               23.7 C
Stanley                      20.7 C               22.8 C
Kwun Tong                    20.3 C               22.7 C
Sham Shui Po                 20.6 C               24.6 C
Kai Tak Runway Park          20.9 C               23.2 C
Yuen Long Park               20.0 C               25.2 C
Tai Mei Tuk               19.5 C               22.1 C

Duration of sunshine (King's Park):              0 H
The mean UV index recorded at King's Park yesterday was 0.7,
the UV intensity was Low.
The maximum UV index for yesterday was 2.
 

Yesterday's (25 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 25 Apr
     2003copy right image | Important notices | Privacy policy Last revision date: <26 Apr 2017> 

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