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Bulletin issued at 10:02 HKT 03/May/2017

At 10 a.m. at the Hong Kong Observatory the air temperature was 27 degrees Celsius and the relative humidity 81 per cent.
During the past hour the mean UV Index recorded at King's Park was 2. The intensity of UV radiation was low.

The air temperatures at other places were:

King's Park 27 degrees;
Wong Chuk Hang 26 degrees;
Ta Kwu Ling 30 degrees;
Lau Fau Shan 29 degrees;
Tai Po 27 degrees;
Sha Tin 28 degrees;
Tuen Mun 28 degrees;
Tseung Kwan O 27 degrees;
Sai Kung 27 degrees;
Cheung Chau 28 degrees;
Chek Lap Kok 29 degrees;
Tsing Yi 28 degrees;
Shek Kong 30 degrees;
Tsuen Wan Ho Koon 27 degrees;
Tsuen Wan Shing Mun Valley 28 degrees;
Hong Kong Park 27 degrees;
Shau Kei Wan 26 degrees;
Kowloon City 27 degrees;
Happy Valley 29 degrees;
Wong Tai Sin 27 degrees;
Stanley 27 degrees;
Kwun Tong 27 degrees;
Sham Shui Po 29 degrees;
Kai Tak Runway Park 27 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 3 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 03/May/2017

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

A southerly airstream is bringing hot weather to the coast of Guangdong.

Weather forecast for today

Hot with sunny periods apart from isolated showers. Moderate south to southeasterly winds.

Outlook : A few showers and thunderstorms in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 03/05/2017; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

Information on Tropical Cyclones

Marine Weather Information and Forecast

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MARINE FORECAST
Traditional Chinese Simplified Chinese

Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 03/May/2017

N0 WARNING.

GENERAL SITUATION AT 022100 UTC:
A SOUTHERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 030100 UTC:

HONG KONG= S TO SE 3-4. ISOL SHOWERS. TEMP 30-24 C. =
KWANGTUNG= S TO SE 4, OCNL 5. ISOL SHOWERS. SEA UP TO 2 M. =
TAIWAN STRAIT= E TO NE 4. ISOL SHOWERS. =
BASHI= E TO SE 4. ISOL SHOWERS. =
PRATAS= S TO SE 4. ISOL SHOWERS. =
BALINTANG= E TO SE 4. ISOL SHOWERS. =
SCARBOROUGH= E TO SE 4. ISOL SHOWERS. =
PARACEL= S TO SE 4, OCNL 5. ISOL SHOWERS. SEA UP TO 2 M. =
TONKIN= S TO SE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
DANANG= S TO SE 4-5. ISOL SHOWERS. 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 03/May/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 03 May 2017

    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 3 to 4.
    Isolated showers.
    Slight to moderate seas.

    Nan'ao and Shanwei:
    South to southeast force 4.
    Moderate seas.

    South of Hong Kong and Shangchuan Dao:
    South to southeast force 4, occasionally force 5.
    Moderate seas.

    Outlook for the next 48 hours
    South to southeasterly winds of force 4 to 5. Isolated showers and thunderstorms.

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

    Waglan Island Wind south force 3
      Visibility 17 Kilometres

    Shantou Wind southeast force 2
      Visibility 19 Kilometres

    Dongsha Wind south-southeast force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind southeast force 4

    Macau Wind south-southeast force 3
      Visibility 8 Kilometres

    Xisha Wind south 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 09:30 HKT 03/MAY/2017
    (Next update at 17:30 HKT 03/MAY/2017)
    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 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  140/5-10
       OFFSHORE:  160/10-15                            27-30
   B.   2000 FT:  180/15                               22
   C.   5000 FT:  210/15                               17
   D.  10000 FT:  260/20                               10
   E.  18000 FT:  290/30                               MS1
   F.  24000 FT:  290/35                               MS15
   G.  30000 FT:  300/35                               MS30
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY WITH ISOLATED SHOWERS. SUNNY
      PERIODS DURING THE DAY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT  SCT 3500 FT.
   K. VISIBILITY    : 9 KM.  TEMPO 4000 M IN SHOWERS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 24 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE SOUTHERLY WINDS. 
     MAINLY CLOUDY WITH A FEW ISOLATED SHOWERS.
     LOCALIZED MIST/FOG.=

    ===================================================================
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 03/May/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     28.1 C
Minimum Air Temperature                     24.3 C
Grass Minimum Temperature                   23.5 C
Relative Humidity                        78 - 91 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January           134.5 mm
Against an average of                      357.8 mm

Other Stations                Min                  Max
King's Park                  23.5 C               28.9 C
Wong Chuk Hang               22.8 C               27.8 C
Ta Kwu Ling                  23.0 C               30.2 C
Lau Fau Shan                 23.0 C               29.7 C
Tai Po                       23.0 C               27.1 C
Sha Tin                      23.0 C               29.2 C
Tuen Mun                     23.6 C               29.5 C
Tseung Kwan O                22.7 C               29.4 C
Sai Kung                     23.6 C               27.8 C
Cheung Chau                  22.9 C               27.4 C
Chek Lap Kok                 24.5 C               29.5 C
Tsing Yi                     23.9 C               29.1 C
Shek Kong                    22.7 C               30.8 C
Tsuen Wan Ho Koon            22.4 C               28.4 C
Tsuen Wan Shing Mun Valley   23.3 C               29.2 C
Hong Kong Park               23.4 C               28.8 C
Shau Kei Wan                 23.0 C               28.1 C
Kowloon City                 23.3 C               29.0 C
Happy Valley                 24.0 C               29.9 C
Wong Tai Sin                 23.7 C               29.3 C
Stanley                      23.5 C               28.2 C
Kwun Tong                    23.6 C               29.1 C
Sham Shui Po                 24.2 C               30.1 C
Kai Tak Runway Park          23.6 C               27.6 C
Yuen Long Park               23.0 C               30.2 C
Tai Mei Tuk               22.9 C               28.8 C

Duration of sunshine (King's Park):              2.4 H
The mean UV index recorded at King's Park yesterday was 2,
the UV intensity was Low.
The maximum UV index for yesterday was 6.
 

Yesterday's (02 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 02 May
     2003copy right image | Important notices | Privacy policy Last revision date: <03 May 2017> 

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