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Bulletin issued at 13:02 HKT 28/Apr/2017

At 1 p.m. at the Hong Kong Observatory the air temperature was 24 degrees Celsius and the relative humidity 65 per cent.
During the past hour the mean UV Index recorded at King's Park was 6. The intensity of UV radiation was high.

The air temperatures at other places were:

King's Park 23 degrees;
Wong Chuk Hang 23 degrees;
Ta Kwu Ling 25 degrees;
Lau Fau Shan 24 degrees;
Tai Po 23 degrees;
Sha Tin 24 degrees;
Tuen Mun 24 degrees;
Tseung Kwan O 23 degrees;
Sai Kung 23 degrees;
Cheung Chau 23 degrees;
Chek Lap Kok 25 degrees;
Tsing Yi 24 degrees;
Shek Kong 24 degrees;
Tsuen Wan Ho Koon 22 degrees;
Tsuen Wan Shing Mun Valley 24 degrees;
Hong Kong Park 23 degrees;
Shau Kei Wan 22 degrees;
Kowloon City 24 degrees;
Happy Valley 24 degrees;
Wong Tai Sin 24 degrees;
Stanley 21 degrees;
Kwun Tong 23 degrees;
Sham Shui Po 24 degrees;
Kai Tak Runway Park 23 degrees;
Yuen Long Park 25 degrees;
Tai Mei Tuk 25 degrees.


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


Climatological Information for 28 Apr

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 12:45 HKT 28/Apr/2017

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

The cloud band now covering the coast of Guangdong is thinning out gradually.

At noon, Tropical Depression Muifa was centred about 1050 kilometres north-northwest of Yap. It is forecast to move north-northeast at about 18 kilometres per hour across the western North Pacific to the east of the Philippines.

Weather forecast for this afternoon and tonight

Sunny periods in the afternoon. Mainly fine tonight. Moderate east to northeasterly winds.

Outlook : Mainly fine tomorrow. Warm with sunny periods on Sunday and Monday.


(The above forecast period is valid up to 23:59 HKT today, 28/04/2017; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

Information on Tropical Cyclones

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MARINE FORECAST
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 28/Apr/2017

N0 WARNING.

GENERAL SITUATION AT 272100 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 280100 UTC:

HONG KONG= NE 4-5, OCNL 6. CLD. SEA UP TO 3 M. SWELL NE UP TO 2 M. TEMP 25-21 C. =
KWANGTUNG= E TO NE 5-6. CLD. SEA 2-3 M. SWELL NE 2 M. =
TAIWAN STRAIT= NE 6-7. ISOL SHOWERS. SEA 3-4 M. SWELL NE 2-3 M. =
BASHI= NE 5-6, UP TO 7 AT FIRST. ISOL SHOWERS AND TS. SEA 2-3 M, UP TO 4 M AT FIRST. SWELL NE 2-3 M. =
PRATAS= NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL NE 2 M. =
BALINTANG= NE 5-6, UP TO 7 AT FIRST. ISOL SHOWERS AND TS. SEA 2-3 M, UP TO 4 M AT FIRST. SWELL NE 2-3 M. =
SCARBOROUGH= N TO NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL NE 2 M. =
PARACEL= NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL NE 2 M. =
TONKIN= NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. =
DANANG= NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 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 12:30 HKT 28/Apr/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 28 April 2017

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

    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 5 to 6.
    Moderate to rough 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-northeast force 4
      Visibility 19 Kilometres

    Shantou Wind west-southwest force 1
      Visibility 30 Kilometres

    Dongsha Wind northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind east-northeast force 4

    Macau Wind north-northeast force 3
      Visibility 9 Kilometres

    Xisha Wind east-northeast force 2
      Visibility 25 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 09:00 HKT 28/APR/2017
    (Next update at 17:30 HKT 28/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 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  030/10
       OFFSHORE:  030/10-15 OCNL 20                    20-25
   B.   2000 FT:  020/10-15                            16
   C.   5000 FT:  310/10                               12
   D.  10000 FT:  290/25                               9
   E.  18000 FT:  290/45                               MS4
   F.  24000 FT:  270/45                               MS16
   G.  30000 FT:  270/55                               MS32
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      4800 -5000 FT
   I. WEATHER       : 
      SUNNY PERIODS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT  SCT 4000 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     : 2.0-2.5 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 28/Apr/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     24.0 C
Minimum Air Temperature                     20.6 C
Grass Minimum Temperature                   20.9 C
Relative Humidity                        75 - 98 Percent
Rainfall                                     3.5 mm 
Total rainfall since 1st January           134.5 mm
Against an average of                      318.9 mm

Other Stations                Min                  Max
King's Park                  20.2 C               23.9 C
Wong Chuk Hang               20.3 C               23.3 C
Ta Kwu Ling                  20.1 C               23.6 C
Lau Fau Shan                 19.9 C               23.5 C
Tai Po                       19.7 C               23.3 C
Sha Tin                      20.5 C               23.9 C
Tuen Mun                     20.5 C               24.2 C
Tseung Kwan O                19.3 C               23.2 C
Sai Kung                     20.3 C               23.6 C
Cheung Chau                  19.0 C               23.2 C
Chek Lap Kok                 20.7 C               25.6 C
Tsing Yi                     20.9 C               24.1 C
Shek Kong                    20.3 C               24.1 C
Tsuen Wan Ho Koon            18.8 C               23.2 C
Tsuen Wan Shing Mun Valley   20.1 C               23.7 C
Hong Kong Park               19.7 C               26.7 C
Shau Kei Wan                 20.0 C               23.4 C
Kowloon City                 19.8 C               24.0 C
Happy Valley                 21.1 C               25.2 C
Wong Tai Sin                 20.1 C               24.0 C
Stanley                      20.4 C               23.9 C
Kwun Tong                    20.1 C               24.1 C
Sham Shui Po                 20.6 C               24.6 C
Kai Tak Runway Park          20.7 C               24.4 C
Yuen Long Park               20.6 C               23.9 C
Tai Mei Tuk               19.9 C               23.4 C

Duration of sunshine (King's Park):              0.1 H
The mean UV index recorded at King's Park yesterday was 1,
the UV intensity was Low.
The maximum UV index for yesterday was 6.
 

Yesterday's (27 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                         0.15
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 27 Apr
     2003copy right image | Important notices | Privacy policy Last revision date: <28 Apr 2017> 

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