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Bulletin issued at 03:02 HKT 16/Apr/2017

At 3 a.m. at the Hong Kong Observatory the air temperature was 23 degrees Celsius and the relative humidity 95 per cent.

The air temperatures at other places were:

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


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


Climatological Information for 16 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 16/Apr/2017

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

A maritime airstream is bringing foggy weather to the coast of Guangdong.

At 2 a.m., the tropical depression in the vicinity of the Philippines was centred about 590 kilometres southeast of Manila. It is forecast to move west-northwest at about 20 kilometres per hour across the central part of the Philippines.

Weather forecast for today

Mainly cloudy. Coastal fog in the morning. Sunny periods during the day. Temperatures will range between 23 and 28 degrees. Light to moderate southeasterly winds.

Outlook : Sunny periods in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 16/04/2017; 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 15/Apr/2017

N0 WARNING.

GENERAL SITUATION AT 150900 UTC:
A SOUTHEASTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 151300 UTC:

HONG KONG= SE 3-4. DOWN TO 500 M IN FOG PATCHES. TEMP 23-28 C. =
KWANGTUNG= E TO SE 3-4. DOWN TO 500 M IN FOG OR RAIN PATCHES. =
TAIWAN STRAIT= E TO SE 4-5. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA UP TO 2 M. =
BASHI= E TO SE 4-5, OCNL 6. FINE. SEA UP TO 3 M. SWELL E UP TO 2 M. =
PRATAS= E TO NE 4-5. FINE. SEA UP TO 2 M. =
BALINTANG= E TO SE 4-5, OCNL 6. FINE. SEA UP TO 3 M. SWELL E UP TO 2 M. =
SCARBOROUGH= NE 3-4. FINE. ISOL SHOWERS AND TS LATER. =
PARACEL= SE 3-4. DOWN TO 500 M IN FOG OR RAIN PATCHES IN N. =
TONKIN= SE 3-4, OCNL 5. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA UP TO 2 M. =
DANANG= SE 3-4, OCNL 5. DOWN TO 500 M IN FOG 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

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    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 03:30 HKT 16/Apr/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 16 April 2017

    Warnings:
    Fog in all areas.

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

    At 3 a.m., the tropical depression in the vicinity of the Philippines with maximum sustained winds of about 45 kilometres per hour near its centre was located near 10.9 degrees north, 125.0 degrees east. It is forecast to move west-northwest at about 20 kilometres per hour across the central part of the Philippines.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Southeast force 3 to 4.
    Fog patches.
    Slight to moderate seas.

    Nan'ao and Shanwei:
    East to southeast force 3 to 4.
    Fog patches.
    Slight to moderate seas.

    South of Hong Kong and Shangchuan Dao:
    Southeast force 3 to 4.
    Fog patches.
    Slight to moderate seas.

    Outlook for the next 48 hours
    Southeasterly winds of force 4, becoming southwesterly winds of force 4 to 5 later. Fog patches.

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

    Waglan Island Wind northeast force 3
      Visibility 290 Metres

    Shantou Wind west force 1
      Visibility 4800 Metres in mist

    Huangmaozhou Wind east force 4

    Macau Wind south-southeast force 2
      Visibility 300 Metres in fog

    Xisha Wind east force 1
      Visibility 30 Kilometres

  • Explanation of Seas or Sea Waves
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  • Map showing forecast areas
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    • WEATHER FORECAST FOR LOCAL AVIATION
    Traditional Chinese Simplified Chinese

    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 16/APR/2017
    (Next update at 9:00-9:30 HKT 16/APR/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     FOG.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A MARITIME AIRSTREAM IS AFFECTING THE COASTAL
     AREAS OF GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  110/5-10
       OFFSHORE:  080/10                               24-30
   B.   2000 FT:  160/10                               20
   C.   5000 FT:  200/10                               17
   D.  10000 FT:  230/15                               10
   E.  18000 FT:  260/25                               MS5
   F.  24000 FT:  260/45                               MS14
   G.  30000 FT:  260/55                               MS30
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY. LOCALIZED MIST. COASTAL FOG
      TONIGHT AND IN THE MORNING. SUNNY PERIODS
      DURING THE DAY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1800 FT  SCT 3000 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 2500 M IN MIST. TEMPO 800M IN FOG.
   L. 0 DEG. C LEVEL: 16000 FT      10 DEG. C LEVEL(S) : 8600, 9600, 11200 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 22 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE SOUTHEASTERLY WINDS.  SUNNY
     PERIODS.
     LOCALIZED MIST.=

    ===================================================================
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 19:13 HKT on 13 Apr 17

    VHHK SIGMET 2 VALID 130715/131115 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1842 E11212 - N1930 E11130 - N2100 E11130 - N2124 E11348 - N1936 E11436 - N1842 E11212 TOP FL380 MOV E 10KT NC= VHHK SIGMET 3 VALID 131115/131515 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1730 E11318 - N2000 E11230 - N2030 E11518 - N1900 E11512 - N1748 E11400 - N1730 E11318 TOP FL380 MOV E 10KT 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

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    Severe Weather Information Centre

    Bulletin issued at 03:30 HKT 16/Apr/2017


    Tropical Cyclone Warning

    The tropical depression in the vicinity of the Philippines has entered the area of responsibility of the Hong Kong Observatory.

    At 151800 UTC, the tropical depression with central pressure 1002 hectopascals was centred within 60 nautical miles of one zero point nine degrees north (10.9 N) one two five point zero degrees east (125.0 E) and is forecast to move west-northwest at about 10 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 25 knots.

    Radius of over 2 metre waves 60 nautical miles.

    Forecast position and intensity at 161800 UTC
    One three point one degrees north (13.1 N)
    One one nine point zero degrees east (119.0 E)
    Maximum winds 25 knots.

    Forecast position and intensity at 171800 UTC
    Dissipated over sea.



    The Hong Kong Observatory's tropical cyclone warnings for shipping are issued about one and a half hours after the time of observation. They incorporate additional information derived from surface and upper-air data and may therefore be slightly different from the real-time satellite or radar-based positions given in the hourly bulletins for public.

    While the forecast positions and track indicate the most likely future path of the tropical cyclone, they may deviate from the actual path taken by the storm.

    Tropical Cyclone Track
    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 16/Apr/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     26.9 C
Minimum Air Temperature                     21.6 C
Grass Minimum Temperature                   20.8 C
Relative Humidity                        77 - 91 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January            98.3 mm
Against an average of                      251.5 mm

Other Stations                Min                  Max
King's Park                  20.9 C               27.8 C
Wong Chuk Hang               20.3 C               27.0 C
Ta Kwu Ling                  20.3 C               28.7 C
Lau Fau Shan                 20.2 C               28.3 C
Tai Po                       20.3 C               25.1 C
Sha Tin                      20.4 C               28.7 C
Tuen Mun                     21.4 C               28.0 C
Tseung Kwan O                19.5 C               27.0 C
Sai Kung                     20.1 C               25.5 C
Cheung Chau                  20.5 C               25.9 C
Chek Lap Kok                 22.2 C               29.3 C
Tsing Yi                     21.0 C               28.8 C
Shek Kong                    20.2 C               30.0 C
Tsuen Wan Ho Koon            19.1 C               28.2 C
Tsuen Wan Shing Mun Valley   20.1 C               29.2 C
Hong Kong Park               20.9 C               27.2 C
Shau Kei Wan                 20.6 C               24.8 C
Kowloon City                 20.8 C               27.6 C
Happy Valley                 21.2 C               28.6 C
Wong Tai Sin                 20.8 C               27.9 C
Stanley                      21.3 C               25.9 C
Kwun Tong                    21.1 C               27.7 C
Sham Shui Po                 21.3 C               29.3 C
Kai Tak Runway Park          21.6 C               25.1 C
Yuen Long Park               20.9 C               29.6 C
Tai Mei Tuk               20.2 C               27.8 C

Duration of sunshine (King's Park):              4.9 H
The mean UV index recorded at King's Park yesterday was 4,
the UV intensity was Moderate.
The maximum UV index for yesterday was 9.
Sea surface temperature (Waglan Island):        22.2 C 

Yesterday's (15 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 15 Apr
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