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Bulletin issued at 19:02 HKT 26/May/2017

At 7 p.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 63 per cent.

The air temperatures at other places were:

King's Park 25 degrees;
Wong Chuk Hang 25 degrees;
Ta Kwu Ling 24 degrees;
Lau Fau Shan 24 degrees;
Tai Po 24 degrees;
Sha Tin 25 degrees;
Tuen Mun 25 degrees;
Tseung Kwan O 23 degrees;
Sai Kung 25 degrees;
Cheung Chau 24 degrees;
Chek Lap Kok 27 degrees;
Tsing Yi 26 degrees;
Shek Kong 25 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 25 degrees;
Kwun Tong 25 degrees;
Sham Shui Po 25 degrees;
Kai Tak Runway Park 26 degrees;
Yuen Long Park 25 degrees;
Tai Mei Tuk 24 degrees.


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


Climatological Information for 26 May

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 18:45 HKT 26/May/2017

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

A band of clouds is covering the coastal areas of Guangdong.

Weather forecast for tonight and tomorrow

Mainly cloudy with one or two isolated showers at first. The minimum temperature will be about 23 degrees. Dry with sunny periods during the day tomorrow. The maximum temperature will be around 28 degrees. Moderate easterly winds, fresh at times tomorrow.

Outlook : Mainly fine and hot on Sunday. A few showers in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 27/05/2017; 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 26/May/2017

N0 WARNING.

GENERAL SITUATION AT 252100 UTC:
TROUGH 17N 111E 19N 120E 21N 125E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 260100 UTC:

HONG KONG= E TO NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. TEMP 28-24 C. =
KWANGTUNG= E TO NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
TAIWAN STRAIT= NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL NE UP TO 2 M. =
BASHI= E TO NE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA 2 M. =
PRATAS= E TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
BALINTANG= W TO SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
SCARBOROUGH= S TO SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= E TO NE 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
TONKIN= N TO NE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. =
DANANG= N TO NW 5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 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 19:30 HKT 26/May/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 7:30 p.m. on 26 May 2017

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    A trough of low pressure is bringing showers to the northern part of the South China Sea.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 4 to 5, becoming force 6.
    Isolated showers.
    Moderate seas, becoming rough.

    Nan'ao and Shanwei:
    East to northeast force 5 to 6.
    Moderate to rough seas.

    South of Hong Kong:
    East to northeast force 5 to 6.
    Isolated squally showers and thunderstorms tomorrow afternoon.
    Moderate to rough seas.

    Shangchuan Dao:
    East to northeast force 5 to 6.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 6. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind east-northeast force 3
      Visibility 18 Kilometres

    Shantou Wind east-northeast force 2
      Visibility 30 Kilometres

    Dongsha Wind northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind northeast force 4

    Macau Wind east-southeast force 1
      Visibility 8 Kilometres

    Xisha Wind east-northeast force 1
      Visibility 14 Kilometres in showers

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

    Bulletin issued at 17:30 HKT 26/MAY/2017
    (Next update at 01:30 HKT 27/MAY/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A BAND OF CLOUDS IS COVERING THE COASTAL AREAS
     OF GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  080/10
       OFFSHORE:  060/15-20                            26-24
   B.   2000 FT:  080/15-20                            19
   C.   5000 FT:  100/10                               15
   D.  10000 FT:  250/15                               9
   E.  18000 FT:  270/25                               MS4
   F.  24000 FT:  270/30                               MS13
   G.  30000 FT:  270/40                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH ISOLATED SHOWERS AT FIRST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT  SCT 6000 FT.
   K. VISIBILITY    : 7 KM.  
                      TEMPO 4000 M IN SHOWERS.
   L. 0 DEG. C LEVEL: 16000 FT      10 DEG. C LEVEL(S) : 9600 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND NEAR HILLS
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 26 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EASTERLY WINDS. 
     MAINLY CLOUDY,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
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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 16:33 HKT on 26 May 17

    VHHK SIGMET 2 VALID 260540/260940 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1948 E11630 - N1712 E11430 - N1742 E11306 - N1930 E11130 - N1948 E11130 - N1948 E11630 TOP FL420 MOV ENE 05KT NC= VHHK SIGMET 3 VALID 260833/261230 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2000 E11636 - N1724 E11436 - N1900 E11454 - N2000 E11636 TOP FL400 MOV E 05KT 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 26/May/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     28.5 C
Minimum Air Temperature                     23.9 C
Grass Minimum Temperature                   23.9 C
Relative Humidity                        66 - 90 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January           533.8 mm
Against an average of                      563.8 mm

Other Stations                Min                  Max
King's Park                  23.9 C               28.6 C
Wong Chuk Hang               23.2 C               28.4 C
Ta Kwu Ling                  22.9 C               29.0 C
Lau Fau Shan                 23.3 C               28.3 C
Tai Po                       23.0 C               27.4 C
Sha Tin                      23.8 C               28.5 C
Tuen Mun                     23.6 C               30.1 C
Tseung Kwan O                22.2 C               29.3 C
Sai Kung                     24.1 C               29.1 C
Cheung Chau                  23.0 C               27.3 C
Chek Lap Kok                 24.2 C               28.5 C
Tsing Yi                     23.3 C               29.6 C
Shek Kong                    23.5 C               29.2 C
Tsuen Wan Ho Koon            22.5 C               27.1 C
Tsuen Wan Shing Mun Valley   22.6 C               29.0 C
Hong Kong Park               23.5 C               30.0 C
Shau Kei Wan                 23.7 C               29.2 C
Kowloon City                 23.6 C               28.8 C
Happy Valley                 24.2 C               29.7 C
Wong Tai Sin                 23.4 C               28.6 C
Stanley                      23.6 C               28.5 C
Kwun Tong                    24.0 C               28.7 C
Sham Shui Po                 24.2 C               29.9 C
Kai Tak Runway Park          24.5 C               28.8 C
Yuen Long Park               23.2 C               29.9 C
Tai Mei Tuk               22.7 C               28.8 C

Duration of sunshine (King's Park):              3.4 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 (25 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 25 May
     2003copy right image | Important notices | Privacy policy Last revision date: <26 May 2017> 

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