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Bulletin issued at 05:02 HKT 14/May/2017

At 5 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 23 degrees;
Ta Kwu Ling 22 degrees;
Lau Fau Shan 23 degrees;
Tai Po 23 degrees;
Sha Tin 23 degrees;
Tuen Mun 23 degrees;
Tseung Kwan O 23 degrees;
Sai Kung 24 degrees;
Cheung Chau 24 degrees;
Chek Lap Kok 25 degrees;
Tsing Yi 24 degrees;
Shek Kong 22 degrees;
Tsuen Wan Ho Koon 23 degrees;
Tsuen Wan Shing Mun Valley 23 degrees;
Hong Kong Park 24 degrees;
Shau Kei Wan 24 degrees;
Kowloon City 25 degrees;
Happy Valley 24 degrees;
Wong Tai Sin 24 degrees;
Stanley 24 degrees;
Kwun Tong 25 degrees;
Sham Shui Po 25 degrees;
Kai Tak Runway Park 25 degrees;
Yuen Long Park 23 degrees;
Tai Mei Tuk 23 degrees.


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


Climatological Information for 14 May

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 04:45 HKT 14/May/2017

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

The trough of low pressure over the northern part of the South China Sea continues to weaken. Meanwhile, a band of clouds is covering the region and the coast of Guangdong.

Weather forecast for today

Mainly cloudy with one or two showers. Sunny periods during the day. The maximum temperature will be about 30 degrees. Light to moderate southerly winds.

Outlook : Heavy showers tomorrow and at first on Tuesday. Weather improving later on Tuesday.


(The above forecast period is valid up to 23:59 HKT today, 14/05/2017; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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MARINE FORECAST
Traditional Chinese Simplified Chinese

Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 13/May/2017

N0 WARNING.

GENERAL SITUATION AT 130900 UTC:
TROUGH 21N 112E 25N 119E 25N 125E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 131300 UTC:

HONG KONG= S TO SE 3-4. ISOL SHOWERS AND TS. TEMP 25-30 C. =
KWANGTUNG= SE 4. ISOL SHOWERS AND TS. =
TAIWAN STRAIT= E TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
BASHI= W TO SW 5-6, BEC NE 4-5. ISOL SHOWERS AND TS. SEA 2 M, 3 M AT FIRST. SWELL S UP TO 2 M. =
PRATAS= SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
BALINTANG= E TO NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. SWELL S UP TO 2 M. =
SCARBOROUGH= E TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
TONKIN= SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= SE 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 14/May/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 14 May 2017

    Weather Situation:
    The unsettled weather associated with a trough of low pressure is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South to southeast force 3 to 4.
    Isolated showers and thunderstorms.
    Slight to moderate seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    Southeast force 4.
    Isolated showers and thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    Southeasterly winds of force 4 to 5, becoming northwesterly winds of up to force 6. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind north-northeast force 1
      Visibility 6 Kilometres

    Shantou Wind calm
      Visibility 7 Kilometres

    Dongsha Wind east-southeast force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind east-southeast force 3

    Macau Wind east-southeast force 1
      Visibility 3100 Metres in mist

    Xisha Wind east-southeast force 2
      Visibility 30 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 14/MAY/2017
    (Next update at 9:00-9:30 HKT 14/MAY/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE TROUGH OF LOW PRESSURE BRINGING SHOWERS TO
     THE COAST OF GUANGDONG IS WEAKENING GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  VRB/5-10
       OFFSHORE:  140/10                               25-29
   B.   2000 FT:  220/10                               20
   C.   5000 FT:  250/10                               17
   D.  10000 FT:  260/15                               9
   E.  18000 FT:  300/15                               MS6
   F.  24000 FT:  330/30                               MS16
   G.  30000 FT:  330/35                               MS32
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      200-300FT
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS. LOCALISED
      MIST AT FIRST. SUNNY PERIODS DURING THE DAY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT  SCT 3500 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 3000 M IN SHOWERS/MIST.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 9600 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE SOUTHERLY WINDS.  SUNNY
     PERIODS DURING THE DAY.=

    ===================================================================
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
    Traditional Chinese Simplified Chinese

    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 16:20 HKT on 13 May 17

    VHHK SIGMET 2 VALID 130820/131220 VHHH- VHHK HONG KONG FIR EMBD TS FCST S OF N1818 AND E OF E11300 TOP FL420 STNR 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 14/May/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     26.6 C
Minimum Air Temperature                     24.5 C
Grass Minimum Temperature                   24.7 C
Relative Humidity                        72 - 89 Percent
Rainfall                                     4.7 mm 
Total rainfall since 1st January           203.5 mm
Against an average of                      455.2 mm

Other Stations                Min                  Max
King's Park                  24.1 C               26.9 C
Wong Chuk Hang               23.3 C               27.5 C
Ta Kwu Ling                  22.6 C               26.5 C
Lau Fau Shan                 23.0 C               26.1 C
Tai Po                       23.4 C               26.6 C
Sha Tin                      23.7 C               27.3 C
Tuen Mun                     23.4 C               26.7 C
Tseung Kwan O                23.2 C               27.8 C
Sai Kung                     24.2 C               27.1 C
Cheung Chau                  23.4 C               26.6 C
Chek Lap Kok                 24.8 C               27.8 C
Tsing Yi                     23.2 C               27.1 C
Shek Kong                    23.1 C               26.7 C
Tsuen Wan Ho Koon            22.1 C               25.6 C
Tsuen Wan Shing Mun Valley   22.9 C               26.8 C
Hong Kong Park               22.9 C               27.5 C
Shau Kei Wan                 23.8 C               28.0 C
Kowloon City                 24.0 C               27.6 C
Happy Valley                 24.4 C               28.6 C
Wong Tai Sin                 23.9 C               27.9 C
Stanley                      23.8 C               27.6 C
Kwun Tong                    24.4 C               28.0 C
Sham Shui Po                 24.5 C               27.6 C
Kai Tak Runway Park          24.4 C               27.2 C
Yuen Long Park               23.3 C               26.9 C
Tai Mei Tuk               23.7 C               26.7 C

Duration of sunshine (King's Park):              0 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 3.
 

Yesterday's (13 May 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                               0.09
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                        0.15

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 13 May
     2003copy right image | Important notices | Privacy policy Last revision date: <14 May 2017> 

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