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Bulletin issued at 03:02 HKT 09/Apr/2017

At 3 a.m. at the Hong Kong Observatory the air temperature was 24 degrees Celsius and the relative humidity 91 per cent.

The air temperatures at other places were:

King's Park 23 degrees;
Wong Chuk Hang 22 degrees;
Ta Kwu Ling 22 degrees;
Lau Fau Shan 23 degrees;
Tai Po 22 degrees;
Sha Tin 21 degrees;
Tuen Mun 23 degrees;
Tseung Kwan O 23 degrees;
Sai Kung 23 degrees;
Cheung Chau 23 degrees;
Chek Lap Kok 25 degrees;
Tsing Yi 22 degrees;
Shek Kong 22 degrees;
Tsuen Wan Ho Koon 21 degrees;
Tsuen Wan Shing Mun Valley 22 degrees;
Hong Kong Park 23 degrees;
Shau Kei Wan 23 degrees;
Kowloon City 23 degrees;
Happy Valley 23 degrees;
Wong Tai Sin 23 degrees;
Stanley 22 degrees;
Kwun Tong 23 degrees;
Sham Shui Po 23 degrees;
Kai Tak Runway Park 23 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 9 Apr

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 02:45 HKT 09/Apr/2017

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

A humid maritime airstream is affecting the coast of Guangdong.

Weather forecast for today

Mainly cloudy with coastal fog in the morning and at night. Sunny periods during the day. There will be isolated showers. Temperatures will range between 23 and 28 degrees. Moderate south to southwesterly winds.

Outlook : Warm with coastal fog on Monday. Rainy with a few thunderstorms midweek this week.


(The above forecast period is valid up to 23:59 HKT today, 09/04/2017; 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 21:00 HKT 08/Apr/2017

N0 WARNING.

GENERAL SITUATION AT 080900 UTC:
A SOUTHERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 081300 UTC:

HONG KONG= S 3-4. DOWN TO 500 M IN FOG PATCHES. ISOL SHOWERS LATER. TEMP 23-28 C. =
KWANGTUNG= S 3-4, UP TO 6 IN W. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA UP TO 3 M. =
TAIWAN STRAIT= SW 4, 5-6 LATER. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA 2-3 M LATER. =
BASHI= SE 4-5, SW 4-5 LATER. RAIN PATCHES. SEA UP TO 2 M. =
PRATAS= S 4. FINE. =
BALINTANG= SE 4-5, SW 4-5 LATER. RAIN PATCHES. SEA UP TO 2 M. =
SCARBOROUGH= E TO SE 4. FINE. =
PARACEL= S 4-5, OCNL 6. DOWN TO 500 M IN FOG OR RAIN PATCHES IN N. SEA UP TO 3 M. =
TONKIN= S 4-5, OCNL 6. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA UP TO 3 M. =
DANANG= S 4-5, OCNL 6. DOWN TO 500 M IN FOG OR RAIN PATCHES. 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
  • 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 03:30 HKT 09/Apr/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 09 April 2017

    Warnings:
    Strong winds in Shangchuan Dao. Fog in all areas.

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South force 3 to 4.
    Fog patches and isolated showers.
    Slight to moderate seas.

    Nan'ao, Shanwei and South of Hong Kong:
    South force 3 to 4.
    Fog patches.
    Slight to moderate seas.

    Shangchuan Dao:
    South force 4 to 5, becoming force 6 later.
    Fog patches.
    Moderate seas, becoming rough later.

    Outlook for the next 48 hours
    South to southwesterly winds of force 4 to 5, becoming northeasterly winds of up to force 6 later. Fog patches.

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

    Waglan Island Wind east-southeast force 2
      Visibility 120 Metres

    Shantou Wind calm
      Visibility 8 Kilometres

    Dongsha Wind south-southeast force 1
      Visibility 10 Kilometres

    Huangmaozhou Wind east-southeast force 3

    Macau Wind southeast force 1
      Visibility 2800 Metres

    Xisha Wind south-southeast force 2
      Visibility 19 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 09/APR/2017
    (Next update at 9:00-9:30 HKT 09/APR/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 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  140/5-10
       OFFSHORE:  140/10-15                            23-29
   B.   2000 FT:  200/15-20                            22
   C.   5000 FT:  220/20-25                            17
   D.  10000 FT:  240/25                               11
   E.  18000 FT:  280/35                               MS4
   F.  24000 FT:  300/45                               MS12
   G.  30000 FT:  300/50                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      1800-2100 FT.
   I. WEATHER       : 
      MAINLY CLOUDY OVERNIGHT. LOCALIZED MIST IN THE MORNING. 
      SUNNY PERIODS DURING THE DAY. ISOLATED SHOWERS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3500 FT.
   K. VISIBILITY    : 9 KM. TEMPO 2000 M IN MIST. 
                      TEMPO 4000 M IN SHOWERS.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 10800 FT
   M. TURBULENCE    : MOD OFFSHORE AND  NEAR HILLS.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 21 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE SOUTHERLY WINDS. SUNNY PERIODS.
     ISOLATED SHOWERS.=

    ===================================================================
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 02:25 HKT on 07 Apr 17

    VHHK SIGMET 1 VALID 061825/062225 VHHH- VHHK HONG KONG FIR SEV ICE FCST WI N2318 E11618 - N2342 E11730 - N2124 E11730 - N1900 E11230 - N2048 E11230 - N2300 E11536 - N2318 E11618 FL150/240 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 09/Apr/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     27.5 C
Minimum Air Temperature                     23.0 C
Grass Minimum Temperature                   22.0 C
Relative Humidity                        73 - 93 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January            76.2 mm
Against an average of                      210.2 mm

Other Stations                Min                  Max
King's Park                  22.2 C               27.8 C
Wong Chuk Hang               21.1 C               26.5 C
Ta Kwu Ling                  21.8 C               28.8 C
Lau Fau Shan                 21.8 C               28.1 C
Tai Po                       21.6 C               27.1 C
Sha Tin                      20.8 C               27.8 C
Tuen Mun                     22.9 C               27.4 C
Tseung Kwan O                21.3 C               28.0 C
Sai Kung                     21.6 C               26.1 C
Cheung Chau                  21.9 C               26.0 C
Chek Lap Kok                 23.9 C               28.3 C
Tsing Yi                     22.0 C               28.5 C
Shek Kong                    21.2 C               29.6 C
Tsuen Wan Ho Koon            20.9 C               26.4 C
Tsuen Wan Shing Mun Valley   21.2 C               27.8 C
Hong Kong Park               22.0 C               27.6 C
Shau Kei Wan                 22.0 C               26.4 C
Kowloon City                 22.0 C               27.8 C
Happy Valley                 21.8 C               28.2 C
Wong Tai Sin                 21.7 C               27.9 C
Stanley                      21.8 C               26.3 C
Kwun Tong                    22.5 C               27.6 C
Sham Shui Po                 22.7 C               28.6 C
Kai Tak Runway Park          21.9 C               26.2 C
Yuen Long Park               21.7 C               28.3 C
Tai Mei Tuk               21.5 C               27.4 C

Duration of sunshine (King's Park):              2.2 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 5.
Sea surface temperature (Waglan Island):        21.5 C 

Yesterday's (08 Apr 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                               0.10
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 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 08 Apr
     2003copy right image | Important notices | Privacy policy Last revision date: <09 Apr 2017> 

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