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Bulletin issued at 01:02 HKT 29/Apr/2017

At 1 a.m. at the Hong Kong Observatory the air temperature was 21 degrees Celsius and the relative humidity 81 per cent.

The air temperatures at other places were:

King's Park 19 degrees;
Wong Chuk Hang 18 degrees;
Ta Kwu Ling 18 degrees;
Lau Fau Shan 19 degrees;
Tai Po 19 degrees;
Sha Tin 17 degrees;
Tuen Mun 20 degrees;
Tseung Kwan O 17 degrees;
Sai Kung 18 degrees;
Cheung Chau 19 degrees;
Chek Lap Kok 21 degrees;
Tsing Yi 19 degrees;
Shek Kong 18 degrees;
Tsuen Wan Ho Koon 17 degrees;
Tsuen Wan Shing Mun Valley 18 degrees;
Hong Kong Park 19 degrees;
Shau Kei Wan 20 degrees;
Kowloon City 20 degrees;
Happy Valley 19 degrees;
Wong Tai Sin 19 degrees;
Stanley 19 degrees;
Kwun Tong 19 degrees;
Sham Shui Po 20 degrees;
Kai Tak Runway Park 21 degrees;
Yuen Long Park 18 degrees;
Tai Mei Tuk 19 degrees.


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


Climatological Information for 29 Apr

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 00:45 HKT 29/Apr/2017

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

A surge of northeast monsoon brought fine weather to the coast of Guangdong yesterday. Locally, it was mainly cloudy with sunny periods during the day. The northeast monsoon will continue to affect the coast of Guangdong today and tomorrow. Besides, Tropical Depression Muifa weakened into an area of low pressure yesterday.

Weather forecast for Hong Kong

Mainly fine. Dry during the day. Temperatures will range between 20 and 27 degrees. Moderate easterly winds.

Outlook : Warm with sunny periods in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 29/04/2017; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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MARINE FORECAST
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 28/Apr/2017

N0 WARNING.

GENERAL SITUATION AT 280900 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 281300 UTC:

HONG KONG= E TO NE 4-5. FINE. SEA UP TO 2 M. SWELL NE UP TO 2 M. TEMP 21-27 C. =
KWANGTUNG= E TO NE 4-5. FINE. SEA UP TO 2 M. SWELL NE 2 M. =
TAIWAN STRAIT= NE 4-5, OCNL 6. FINE. SEA UP TO 3 M. SWELL NE 2-3 M. =
BASHI= NE 5-6. RAIN PATCHES. SEA 2-3 M. SWELL NE 2-3 M. =
PRATAS= NE 4-5. RAIN PATCHES. SEA UP TO 2 M. SWELL NE 2 M. =
BALINTANG= NE 5-6. RAIN PATCHES. SEA 2-3 M. SWELL NE 2-3 M. =
SCARBOROUGH= E TO NE 4-5. CLD. SEA UP TO 2 M. SWELL NE 2 M. =
PARACEL= E TO NE 4-5. RAIN PATCHES. SEA UP TO 2 M. SWELL NE 2 M. =
TONKIN= NE 4-5. RAIN PATCHES. SEA UP TO 2 M. =
DANANG= NE 4-5. 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 23:30 HKT 28/Apr/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 28 April 2017

    Weather Situation:
    The northeast monsoon is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 4 to 5.
    Moderate seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    East to northeast force 4 to 5.
    Moderate seas.

    Outlook for the next 48 hours
    East to southeasterly winds of force 4 to 5.

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

    Waglan Island Wind east force 2
      Visibility 18 Kilometres

    Shantou Wind east force 1
      Visibility 30 Kilometres

    Dongsha Wind northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 3

    Macau Wind south-southeast force 1
      Visibility 13 Kilometres

    Xisha Wind east-northeast force 2
      Visibility 20 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
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    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 29/APR/2017
    (Next update at 9:00-9:30 HKT 29/APR/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON 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:  120/5-10
       OFFSHORE:  100/15                               19-25
   B.   2000 FT:  040/10                               16
   C.   5000 FT:  340/10                               12
   D.  10000 FT:  300/25                               8
   E.  18000 FT:  300/45                               MS3
   F.  24000 FT:  280/35                               MS14
   G.  30000 FT:  270/45                               MS29
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT.
   K. VISIBILITY    : 9 KM.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 9000 FT
   M. TURBULENCE    : MOD OFFSHORE.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 23 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS.  MAINLY FINE.=

    ===================================================================
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 16:45 HKT on 27 Apr 17

    VHHK SIGMET 2 VALID 270445/270845 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1936 E11618 - N1936 E11154 - N2200 E11600 - N2200 E11730 - N2100 E11730 TOP FL380 MOV E 10KT NC= VHHK SIGMET 4 VALID 270845/271245 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2000 E11642 - N1836 E11536 - N1836 E11218 - N2000 E11254 - N2000 E11642 TOP FL380 MOV E 10KT 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 29/Apr/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     24.8 C
Minimum Air Temperature                     20.2 C
Grass Minimum Temperature                   20.0 C
Relative Humidity                        65 - 81 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January           134.5 mm
Against an average of                      323.7 mm

Other Stations                Min                  Max
King's Park                  19.5 C               24.5 C
Wong Chuk Hang               17.8 C               23.2 C
Ta Kwu Ling                  18.2 C               24.9 C
Lau Fau Shan                 19.1 C               26.3 C
Tai Po                       18.9 C               23.6 C
Sha Tin                      18.0 C               24.0 C
Tuen Mun                     19.6 C               25.9 C
Tseung Kwan O                17.4 C               23.6 C
Sai Kung                     18.6 C               24.1 C
Cheung Chau                  18.7 C               23.5 C
Chek Lap Kok                 20.4 C               25.7 C
Tsing Yi                     19.1 C               24.6 C
Shek Kong                    18.5 C               25.9 C
Tsuen Wan Ho Koon            17.5 C               23.1 C
Tsuen Wan Shing Mun Valley   17.9 C               23.9 C
Hong Kong Park               19.4 C               23.9 C
Shau Kei Wan                 19.5 C               24.1 C
Kowloon City                 19.4 C               24.1 C
Happy Valley                 19.4 C               24.8 C
Wong Tai Sin                 19.0 C               24.1 C
Stanley                      19.5 C               23.0 C
Kwun Tong                    19.6 C               24.0 C
Sham Shui Po                 20.0 C               24.6 C
Kai Tak Runway Park          20.6 C               23.7 C
Yuen Long Park               18.8 C               25.7 C
Tai Mei Tuk               18.9 C               25.6 C

Duration of sunshine (King's Park):              2.3 H
The mean UV index recorded at King's Park yesterday was 3,
the UV intensity was Moderate.
The maximum UV index for yesterday was 8.
 

Yesterday's (28 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 28 Apr
     2003copy right image | Important notices | Privacy policy Last revision date: <29 Apr 2017> 

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