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Bulletin issued at 06:02 HKT 23/Mar/2017

At 6 a.m. at the Hong Kong Observatory the air temperature was 19 degrees Celsius and the relative humidity 91 per cent.

The air temperatures at other places were:

King's Park 19 degrees;
Wong Chuk Hang 20 degrees;
Ta Kwu Ling 19 degrees;
Lau Fau Shan 19 degrees;
Tai Po 19 degrees;
Sha Tin 20 degrees;
Tuen Mun 20 degrees;
Tseung Kwan O 19 degrees;
Sai Kung 19 degrees;
Cheung Chau 19 degrees;
Chek Lap Kok 21 degrees;
Tsing Yi 20 degrees;
Shek Kong 20 degrees;
Tsuen Wan Ho Koon 19 degrees;
Tsuen Wan Shing Mun Valley 20 degrees;
Hong Kong Park 19 degrees;
Shau Kei Wan 18 degrees;
Kowloon City 19 degrees;
Happy Valley 20 degrees;
Wong Tai Sin 20 degrees;
Stanley 19 degrees;
Kwun Tong 19 degrees;
Sham Shui Po 20 degrees;
Kai Tak Runway Park 19 degrees;
Yuen Long Park 19 degrees;
Tai Mei Tuk 19 degrees.


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


Climatological Information for 23 Mar

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 05:45 HKT 23/Mar/2017

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

The northeast monsoon is affecting the coastal areas of Guangdong. Locally, visibility at Waglan Island fell to around 3000 metres this morning.

Weather forecast for today

Mainly cloudy. Misty in the morning and at night. Sunny periods during the day with a maximum temperature of about 24 degrees. Moderate easterly winds.

Outlook : Sunny intervals in the next couple of days. Occasional rain with temperatures falling significantly on Sunday.


(The above forecast period is valid up to 23:59 HKT today, 23/03/2017; 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 21:00 HKT 22/Mar/2017

N0 WARNING.

GENERAL SITUATION AT 220900 UTC:
THE NORTHEAST MONSOON IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 221300 UTC:

HONG KONG= E 4-5, OCNL 6. DOWN TO 2000 M IN MIST OR RAIN PATCHES. SEA UP TO 3 M. SWELL E UP TO 2 M. TEMP 18-23 C. =
KWANGTUNG= E TO NE 5, OCNL 6. DOWN TO 2000 M IN MIST OR RAIN PATCHES. SEA UP TO 3 M. SWELL E TO NE 2 M. =
TAIWAN STRAIT= NE 5-6. RAIN PATCHES. SEA 2-3 M. SWELL NE 2 M. =
BASHI= SE 4-5, NE 6 LATER. RAIN PATCHES. SEA UP TO 2 M, 3 M LATER. SWELL E 2 M. =
PRATAS= E TO SE 4-5, NE 5 LATER. CLD. SEA UP TO 2 M. SWELL E UP TO 2 M. =
BALINTANG= SE 4-5, NE 6 LATER. RAIN PATCHES. SEA UP TO 2 M, 3 M LATER. SWELL E 2 M. =
SCARBOROUGH= SE 4-5. CLD. SEA UP TO 2 M. SWELL E UP TO 2 M. =
PARACEL= E TO SE 4-5. DOWN TO 2000 M IN MIST PATCHES IN N. SEA UP TO 2 M. SWELL E UP TO 2 M. =
TONKIN= SE 4-5. DOWN TO 2000 M IN MIST OR RAIN PATCHES. SEA UP TO 2 M. =
DANANG= SE 4-5. DOWN TO 2000 M IN MIST OR RAIN PATCHES. 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 23/Mar/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 23 March 2017

    Warnings:
    Strong winds in Hong Kong adjacent waters, Nan'ao, Shanwei and south of Hong Kong.

    Weather Situation:
    The northeast monsoon is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 4 to 5, occasionally force 6.
    Mist patches. A few rain patches at first.
    Moderate to rough seas.

    Nan'ao, Shanwei and South of Hong Kong:
    East to northeast force 5, occasionally force 6.
    Moderate to rough seas.

    Shangchuan Dao:
    East force 4 to 5.
    Moderate seas.

    Outlook for the next 48 hours
    Easterly winds of force 4 to 5, becoming north to northeasterly winds of force 6 to 7 later.

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

    Waglan Island Wind northeast force 3
      Visibility 4200 Metres

    Shantou Wind east-northeast force 2
      Visibility 4700 Metres in mist

    Dongsha Wind east force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind east-northeast force 6

    Macau Wind east force 2
      Visibility 3900 Metres in mist

    Xisha Wind southeast force 1
      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 23/MAR/2017
    (Next update at 9:00-9:30 HKT 23/MAR/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON 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:  080/10-15
       OFFSHORE:  080/15-20, OCNL 25                   20-26
   B.   2000 FT:  150/15-20                            18
   C.   5000 FT:  210/15                               14
   D.  10000 FT:  250/30                               8
   E.  18000 FT:  250/45                               MS7
   F.  24000 FT:  250/65                               MS17
   G.  30000 FT:  230/80                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      1400 - 2200 FT
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW RAIN PATCHES.
      LOCALIZED MIST. SUNNY PERIODS DURING THE DAY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT  SCT 2000 FT
   K. VISIBILITY    : 7 KM. TEMPO 3000 M IN RAIN/MIST.
   L. 0 DEG. C LEVEL: 14500 FT      10 DEG. C LEVEL(S) : 8800 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND  NEAR HILLS.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 18 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS, OCCASIONALLY FRESH OFFSHORE.
     SUNNY PERIODS.=

    ===================================================================
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 21:28 HKT on 22 Mar 17

    VHHK SIGMET 1 VALID 220930/221330 VHHH- VHHK HONG KONG FIR SEV ICE FCST N OF N2100 AND W OF E11530 FL160/200 MOV ENE 10KT WKN= VHHK SIGMET 2 VALID 221330/221730 VHHH- VHHK HONG KONG FIR SEV ICE FCST N OF N2100 AND E OF E11300 FL160/200 MOV ENE 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 23/Mar/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     19.7 C
Minimum Air Temperature                     17.6 C
Grass Minimum Temperature                   19.0 C
Relative Humidity                        83 - 94 Percent
Rainfall                                     0.9 mm 
Total rainfall since 1st January            52.5 mm
Against an average of                      124.1 mm

Other Stations                Min                  Max
King's Park                  16.9 C               19.3 C
Wong Chuk Hang               17.6 C               20.3 C
Ta Kwu Ling                  17.5 C               19.5 C
Lau Fau Shan                 17.7 C               20.2 C
Tai Po                       17.5 C               19.6 C
Sha Tin                      17.2 C               20.0 C
Tuen Mun                     18.6 C               21.1 C
Tseung Kwan O                17.0 C               18.8 C
Sai Kung                     17.6 C               19.6 C
Cheung Chau                  17.4 C               19.7 C
Chek Lap Kok                 18.3 C               21.3 C
Tsing Yi                     18.0 C               20.6 C
Shek Kong                    17.9 C               21.7 C
Tsuen Wan Ho Koon            17.0 C               19.7 C
Tsuen Wan Shing Mun Valley   17.5 C               20.1 C
Hong Kong Park               17.0 C               19.9 C
Shau Kei Wan                 16.4 C               19.1 C
Kowloon City                 17.2 C               19.6 C
Happy Valley                 17.5 C               20.2 C
Wong Tai Sin                 17.3 C               20.3 C
Stanley                      17.0 C               19.5 C
Kwun Tong                    16.7 C               19.7 C
Sham Shui Po                 18.3 C               20.5 C
Kai Tak Runway Park          17.4 C               20.0 C
Yuen Long Park               18.4 C               21.1 C
Tai Mei Tuk               16.8 C               19.0 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 4.
Sea surface temperature (Waglan Island):        18.6 C 

Yesterday's (22 Mar 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                               0.10
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                        0.15

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 22 Mar
     2003copy right image | Important notices | Privacy policy Last revision date: <23 Mar 2017> 

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