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Bulletin issued at 10:02 HKT 06/May/2017

At 10 a.m. at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 71 per cent.
During the past hour the mean UV Index recorded at King's Park was 3. The intensity of UV radiation was moderate.

The air temperatures at other places were:

King's Park 30 degrees;
Wong Chuk Hang 28 degrees;
Ta Kwu Ling 29 degrees;
Lau Fau Shan 28 degrees;
Tai Po 28 degrees;
Sha Tin 29 degrees;
Tuen Mun 29 degrees;
Tseung Kwan O 30 degrees;
Sai Kung 28 degrees;
Cheung Chau 28 degrees;
Chek Lap Kok 29 degrees;
Tsing Yi 29 degrees;
Shek Kong 29 degrees;
Tsuen Wan Ho Koon 27 degrees;
Tsuen Wan Shing Mun Valley 29 degrees;
Hong Kong Park 29 degrees;
Shau Kei Wan 29 degrees;
Kowloon City 30 degrees;
Happy Valley 30 degrees;
Wong Tai Sin 29 degrees;
Stanley 28 degrees;
Kwun Tong 30 degrees;
Sham Shui Po 29 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 29 degrees;
Tai Mei Tuk 29 degrees.


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


Climatological Information for 6 May

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 09:45 HKT 06/May/2017

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

Winds are light over the coastal areas of Guangdong. Locally, it was hazy this morning with visibility staying around 3000 metres in many places. Besides, a weak trough of low pressure is bringing showers to the northern part of the South China Sea.

Weather forecast for today

Mainly fine and hot apart from rather low visibility. There will be one or two isolated showers. Light winds.

Outlook : Sunny intervals and one or two showers in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 06/05/2017; 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 09:00 HKT 06/May/2017

N0 WARNING.

GENERAL SITUATION AT 052100 UTC:
TROUGH 19N 108E 21N 113E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 060100 UTC:

HONG KONG= S 2-3, BEC E 4-5. DOWN TO 1000 M IN MIST PATCHES. ISOL SHOWERS AND TS. SEA UP TO 2 M. TEMP 31-23 C. =
KWANGTUNG= S TO SE 4, BEC E 4-5. DOWN TO 1000 M IN MIST PATCHES. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
TAIWAN STRAIT= NE 5-6. DOWN TO 2000 M IN MIST PATCHES. ISOL SHOWERS. SEA 2-3 M. =
BASHI= E 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
PRATAS= SE 4, BEC E 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
BALINTANG= E 4-5. FINE. SEA UP TO 2 M. =
SCARBOROUGH= E TO NE 4, OCNL 5. FINE. SEA UP TO 2 M. =
PARACEL= E TO SE 4, BEC E 4. ISOL SHOWERS AND TS. =
TONKIN= E TO SE 4, OCNL 5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= E TO SE 4, OCNL 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 09:30 HKT 06/May/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 06 May 2017

    Weather Situation:
    A weak trough of low pressure is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South force 2 to 3, becoming east force 4 to 5.
    Visibility rather low in some areas. Isolated showers and thunderstorms.
    Slight to moderate seas.

    Nan'ao, Shanwei and South of Hong Kong:
    South to southeast force 4, becoming east force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

    Shangchuan Dao:
    South to southeast force 4, becoming east force 4.
    Isolated showers and thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    Easterly winds of force 4 to 5, becoming southerly winds of force 4 to 5 later.

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

    Waglan Island Wind northwest force 1
      Visibility 4800 Metres

    Shantou Wind east-northeast force 1
      Visibility 9 Kilometres

    Dongsha Wind north-northeast force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind northwest force 1

    Macau Wind north force 1
      Visibility 2200 Metres in mist

    Xisha Wind east force 2
      Visibility 23 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 09:30 HKT 06/MAY/2017
    (Next update at 17:30 HKT 06/MAY/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     WINDS ARE LIGHT OVER THE COASTAL AREAS OF
     GUANGDONG.  AN EASTERLY AIRSTREAM WILL AFFECT
     THE SOUTH CHINA COASTAL AREAS LATER.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  VRB/5
                  BEC 090/10 LATER
       OFFSHORE:  150/10
                  BEC 090/10-15 LATER                  27-31
   B.   2000 FT:  070/5-10                             23
   C.   5000 FT:  180/5-10                             17
   D.  10000 FT:  250/15                               9
   E.  18000 FT:  270/15                               MS4
   F.  24000 FT:  270/25                               MS14
   G.  30000 FT:  260/30                               MS29
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY FINE. LOCALIZED MIST/HAZE. 
      ISOLATED SHOWERS LATER.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 2000 M IN SHOWERS/MIST/HAZE.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 9600 FT
   M. TURBULENCE    : MOD OFFSHORE LATER.
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS.  
     MAINLY CLOUDY AND A FEW SHOWERS.  LOCALIZED MIST.=

    ===================================================================
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 07:15 HKT on 06 May 17

    VHHK SIGMET 4 VALID 052110/060110 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1918 E11142 - N1930 E11130 - N2100 E11130 - N2106 E11254 - N1948 E11300 - N1918 E11142 TOP FL380 MOV E 05KT NC= VHHK SIGMET 5 VALID 052315/060315 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1912 E11142 - N1930 E11130 - N2124 E11130 - N2212 E11306 - N1948 E11318 - N1912 E11142 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 06/May/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     29.8 C
Minimum Air Temperature                     23.4 C
Grass Minimum Temperature                   22.6 C
Relative Humidity                        69 - 95 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January           177.0 mm
Against an average of                      385.1 mm

Other Stations                Min                  Max
King's Park                  23.0 C               29.2 C
Wong Chuk Hang               21.5 C               27.6 C
Ta Kwu Ling                  20.7 C               31.1 C
Lau Fau Shan                 22.0 C               29.2 C
Tai Po                       21.7 C               28.1 C
Sha Tin                      21.7 C               29.7 C
Tuen Mun                     22.3 C               29.8 C
Tseung Kwan O                21.6 C               30.1 C
Sai Kung                     22.0 C               28.2 C
Cheung Chau                  22.2 C               29.6 C
Chek Lap Kok                 23.4 C               29.4 C
Tsing Yi                     22.4 C               29.5 C
Shek Kong                    21.5 C               30.4 C
Tsuen Wan Ho Koon            21.2 C               28.0 C
Tsuen Wan Shing Mun Valley   21.5 C               29.8 C
Hong Kong Park               22.3 C               29.3 C
Shau Kei Wan                 22.6 C               28.8 C
Kowloon City                 22.7 C               30.4 C
Happy Valley                 22.3 C               30.7 C
Wong Tai Sin                 22.0 C               30.5 C
Stanley                      22.3 C               28.8 C
Kwun Tong                    23.1 C               30.3 C
Sham Shui Po                 22.9 C               30.1 C
Kai Tak Runway Park          22.9 C               29.5 C
Yuen Long Park               21.7 C               30.5 C
Tai Mei Tuk               22.1 C               29.6 C

Duration of sunshine (King's Park):              5.4 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 (05 May 2017) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 to
0.14 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                               0.09
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                        0.14

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 05 May
     2003copy right image | Important notices | Privacy policy Last revision date: <06 May 2017> 

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