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Bulletin issued at 06:02 HKT 13/May/2018

At 6 a.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 92 per cent.

The air temperatures at other places were:

King's Park 25 degrees;
Wong Chuk Hang 24 degrees;
Ta Kwu Ling 22 degrees;
Lau Fau Shan 24 degrees;
Sha Tin 24 degrees;
Tuen Mun 24 degrees;
Tseung Kwan O 23 degrees;
Sai Kung 23 degrees;
Cheung Chau 24 degrees;
Chek Lap Kok 26 degrees;
Tsing Yi 25 degrees;
Shek Kong 24 degrees;
Tsuen Wan Ho Koon 24 degrees;
Tsuen Wan Shing Mun Valley 25 degrees;
Hong Kong Park 25 degrees;
Shau Kei Wan 25 degrees;
Kowloon City 25 degrees;
Happy Valley 26 degrees;
Wong Tai Sin 25 degrees;
Stanley 24 degrees;
Kwun Tong 25 degrees;
Sham Shui Po 25 degrees;
Kai Tak Runway Park 25 degrees;
Yuen Long Park 24 degrees;
Tai Mei Tuk 24 degrees.


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


Climatological Information for 13 May

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 05:45 HKT 13/May/2018

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

The weather is generally fine over southeastern China.

Weather forecast for today

Mainly fine. Hot during the day with a maximum temperature of around 31 degrees. Light to moderate southerly winds.

Outlook : Mainly fine and hot in the next few days.


(The above forecast period is valid up to 23:59 HKT today, 13/05/2018; 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 12/May/2018

N0 WARNING.

GENERAL SITUATION AT 120900 UTC:
A SOUTHERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 121300 UTC:

HONG KONG= S TO SE 4. FINE. TEMP 26-31 C. =
KWANGTUNG= S TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E UP TO 2 M. =
TAIWAN STRAIT= S TO SW 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
BASHI= SE 4-5. FINE. SEA UP TO 2 M. SWELL E UP TO 2 M. =
PRATAS= S TO SE 4-5. FINE. SEA UP TO 2 M. SWELL E UP TO 2 M. =
BALINTANG= SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E UP TO 2 M. =
SCARBOROUGH= E 5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E TO NE UP TO 2 M. =
PARACEL= SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E UP TO 2 M. =
TONKIN= S TO SE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. =
DANANG= S TO SE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 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
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    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

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    Bulletin issued at 05:30 HKT 13/May/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 13 May 2018

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South to southeast force 4.
    Moderate seas.

    Nan'ao, Shanwei and South of Hong Kong:
    South to southeast force 4 to 5.
    Moderate seas.

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

    Outlook for the next 48 hours
    Southerly winds of force 4 to 5, occasionally force 6.

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

    Waglan Island Wind southwest force 2
      Visibility 13 Kilometres

    Shantou Wind south force 1
      Visibility 16 Kilometres

    Dongsha Wind south-southeast force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind south-southeast force 1

    Xisha Wind east force 1
      Visibility 30 Kilometres

  • Explanation of Seas or Sea Waves
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 13/MAY/2018
    (Next update at 9:00-9:30 HKT 13/MAY/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A SOUTHERLY 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:  160/5-10
       OFFSHORE:  160/10-15                            25-33
   B.   2000 FT:  220/10                               22
   C.   5000 FT:  240/10                               19
   D.  10000 FT:  260/10                               12
   E.  18000 FT:  260/15                               MS3
   F.  24000 FT:  240/15                               MS12
   G.  30000 FT:  220/20                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 11000 FT
   M. TURBULENCE    : NIL.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE SOUTHERLY 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 08:29 HKT on 11 May 18

    VHHK SIGMET 1 VALID 110030/110430 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2042 E11330 - N2006 E11130 - N2130 E11130 - N2218 E11324 - N2042 E11330 TOP FL350 MOV NE 15KT 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 13/May/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     30.6 C
Minimum Air Temperature                     24.2 C
Grass Minimum Temperature                   23.5 C
Relative Humidity                        69 - 92 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January           170.7 mm
Against an average of                      453.7 mm

Other Stations                Min                  Max
King's Park                  23.6 C               30.1 C
Wong Chuk Hang               24.1 C               28.6 C
Ta Kwu Ling                  23.8 C               30.6 C
Lau Fau Shan                 22.4 C               31.2 C
Sha Tin                      23.9 C               30.9 C
Tuen Mun                     23.7 C               31.2 C
Tseung Kwan O                23.0 C               29.2 C
Sai Kung                     23.5 C               29.6 C
Cheung Chau                  23.3 C               30.0 C
Chek Lap Kok                 24.6 C               31.7 C
Tsing Yi                     24.2 C               30.5 C
Shek Kong                    23.0 C               32.4 C
Tsuen Wan Ho Koon            22.2 C               30.0 C
Tsuen Wan Shing Mun Valley   23.5 C               30.5 C
Hong Kong Park               23.8 C               30.6 C
Shau Kei Wan                 23.2 C               27.9 C
Kowloon City                 23.4 C               29.9 C
Happy Valley                 24.1 C               31.1 C
Wong Tai Sin                 23.6 C               30.8 C
Stanley                      23.7 C               28.7 C
Kwun Tong                    23.5 C               30.2 C
Sham Shui Po                 24.0 C               30.4 C
Kai Tak Runway Park          24.1 C               27.7 C
Yuen Long Park               23.5 C               31.8 C
Tai Mei Tuk               23.2 C               31.2 C

Duration of sunshine (King's Park):              8.1 H
The mean UV index recorded at King's Park yesterday was 4,
the UV intensity was Moderate.
The maximum UV index for yesterday was 10.
Sea surface temperature (Waglan Island):        24.8 C 

Yesterday's (12 May 2018) 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                             0.08
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                        0.14

Note

      

    1. From readings taken at various locations in Hong Kong in the
past, the hourly mean ambient gamma radiation dose rate may
vary between 0.06 and 0.3 microsievert per hour. (1
microsievert = 0.000001 sievert = 0.001 millisievert)

    2. Temporal variations are generally caused by changes in
meteorological conditions such as rainfall, wind and
barometric pressure.

    3. Spatial variations are generally caused by differences in
the radioactive content of local rock and soil.

    4. The data displayed is provisional. Only limited data
validation has been carried out.
    Climatological Information for 12 May
     2003copy right image | Important notices | Privacy policy Last revision date: <13 May 2018> 

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