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Bulletin issued at 04:02 HKT 17/Apr/2018

At 4 a.m. at the Hong Kong Observatory the air temperature was 18 degrees Celsius and the relative humidity 87 per cent.

The air temperatures at other places were:

King's Park 17 degrees;
Wong Chuk Hang 18 degrees;
Ta Kwu Ling 15 degrees;
Lau Fau Shan 15 degrees;
Tai Po 15 degrees;
Sha Tin 17 degrees;
Tuen Mun 16 degrees;
Tseung Kwan O 16 degrees;
Sai Kung 17 degrees;
Cheung Chau 17 degrees;
Chek Lap Kok 17 degrees;
Tsing Yi 18 degrees;
Shek Kong 16 degrees;
Tsuen Wan Ho Koon 16 degrees;
Tsuen Wan Shing Mun Valley 17 degrees;
Hong Kong Park 18 degrees;
Shau Kei Wan 17 degrees;
Kowloon City 17 degrees;
Happy Valley 18 degrees;
Wong Tai Sin 17 degrees;
Stanley 17 degrees;
Kwun Tong 17 degrees;
Sham Shui Po 17 degrees;
Kai Tak Runway Park 18 degrees;
Yuen Long Park 16 degrees;
Tai Mei Tuk 16 degrees.


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


Climatological Information for 17 Apr

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 03:45 HKT 17/Apr/2018

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

The northeast monsoon is affecting the south China coast.

Weather forecast for today

Mainly cloudy. It will be cool with a few showers at first. The minimum temperature will be about 17 degrees in the urban areas, and a couple of degrees lower in the New Territories. Bright periods in the afternoon with a maximum temperature of around 23 degrees. Moderate east to northeasterly winds, occasionally fresh offshore at first.

Outlook : Temperatures rising in the following few days.


(The above forecast period is valid up to 23:59 HKT today, 17/04/2018; 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 16/Apr/2018

N0 WARNING.

GENERAL SITUATION AT 160900 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 161300 UTC:

HONG KONG= E TO NE 5, OCNL 6. A FEW SHOWERS. SEA UP TO 3 M. TEMP 17-23 C. =
KWANGTUNG= E TO NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL NE 2 M. =
TAIWAN STRAIT= NE 6-7. ISOL SHOWERS. SEA 3-4 M. SWELL NE 2 M. =
BASHI= E TO NE 6-7. ISOL SHOWERS. SEA 3-4 M. SWELL NE 2 M. =
PRATAS= E TO NE 5-6, OCNL 7. ISOL SHOWERS AND TS. SEA UP TO 4 M. SWELL NE 2 M. =
BALINTANG= E TO NE 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL NE 2 M. =
SCARBOROUGH= NE 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL NE 2 M. =
PARACEL= NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL NE UP TO 2 M. =
TONKIN= N TO NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. =
DANANG= NE 5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. SWELL NE 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 03:30 HKT 17/Apr/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 17 April 2018

    Warnings:
    Strong winds in all areas.

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 5, occasionally force 6.
    A few showers.
    Moderate to rough seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    East to northeast force 5 to 6.
    Isolated showers and thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    Easterly winds of force 5 to 6.

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

    Waglan Island Wind northeast force 3
      Visibility 15 Kilometres

    Shantou Wind south-southeast force 1
      Visibility 7 Kilometres

    Huangmaozhou Wind northeast force 3

    Macau Wind north force 3
      Visibility 3400 Metres in mist

    Xisha Wind east-northeast force 2
      Visibility 18 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
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    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 17/APR/2018
    (Next update at 9:00-9:30 HKT 17/APR/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
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:  030/10-15
       OFFSHORE:  040/15-20                            16-22
   B.   2000 FT:  050/10                               14
   C.   5000 FT:  280/10                               14
   D.  10000 FT:  270/25                               7
   E.  18000 FT:  260/45                               MS6
   F.  24000 FT:  260/50                               MS18
   G.  30000 FT:  250/75                               MS30
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      3200-4500 FT
   I. WEATHER       : 
      MAINLY CLOUDY. A FEW RAIN PATCHES AT FIRST.
      LOCALISED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 800 FT  SCT 1500 FT.
   K. VISIBILITY    : 9 KM.  TEMPO 4000 M IN RAIN/MIST.
   L. 0 DEG. C LEVEL: 14500 FT      10 DEG. C LEVEL(S) : 8000 FT
   M. TURBULENCE    : MOD OFFSHORE
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 23 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS. BRIGHT 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 13:35 HKT on 15 Apr 18

    VHHK SIGMET 3 VALID 150345/150745 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2000 E11130 - N2124 E11130 - N2230 E11342 - N2336 E11712 - N2242 E11712 - N2000 E11130 - N2000 E11130 TOP FL400 MOV NE 15KT NC= VHHK SIGMET 5 VALID 150535/150935 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2248 E11442 - N2342 E11730 - N2248 E11730 - N2154 E11442 - N2248 E11442 TOP FL400 MOV NE 15KT 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

    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 17/Apr/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     19.4 C
Minimum Air Temperature                     17.5 C
Grass Minimum Temperature                   17.9 C
Relative Humidity                        82 - 96 Percent
Rainfall                                     2.0 mm 
Total rainfall since 1st January           108.6 mm
Against an average of                      252.1 mm

Other Stations                Min                  Max
King's Park                  16.9 C               18.7 C
Wong Chuk Hang               17.2 C               19.7 C
Ta Kwu Ling                  15.0 C               17.0 C
Lau Fau Shan                 14.9 C               16.9 C
Tai Po                       15.5 C               17.2 C
Sha Tin                      16.2 C               18.1 C
Tuen Mun                     15.4 C               17.3 C
Tseung Kwan O                16.3 C               18.6 C
Sai Kung                     16.2 C               18.3 C
Cheung Chau                  16.3 C               18.5 C
Chek Lap Kok                 16.4 C               18.9 C
Tsing Yi                     16.9 C               19.2 C
Shek Kong                    15.4 C               17.1 C
Tsuen Wan Ho Koon            15.0 C               16.9 C
Tsuen Wan Shing Mun Valley   16.3 C               18.3 C
Hong Kong Park               16.8 C               19.4 C
Shau Kei Wan                 16.2 C               18.8 C
Kowloon City                 16.4 C               18.3 C
Happy Valley                 17.6 C               19.8 C
Wong Tai Sin                 16.6 C               18.6 C
Stanley                      16.9 C               20.0 C
Kwun Tong                    16.8 C               18.7 C
Sham Shui Po                 16.5 C               18.7 C
Kai Tak Runway Park          17.1 C               19.6 C
Yuen Long Park               15.3 C               17.3 C
Tai Mei Tuk               15.5 C               18.2 C

Duration of sunshine (King's Park):              0.0 H
The mean UV index recorded at King's Park yesterday was 0.5,
the UV intensity was Low.
The maximum UV index for yesterday was 1.
Sea surface temperature (Waglan Island):        22.5 C 

Yesterday's (16 Apr 2018) 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                               0.11
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.12
Sha Tau Kok                         0.11
Kwun Tong                           0.12
Sai Wan Ho                          0.10
King's Park                         0.15
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.14
Chek Lap Kok                        0.15

Note

      

    1. From readings taken at various locations in Hong Kong in the
past, the hourly mean ambient gamma radiation dose rate may
vary between 0.06 and 0.3 microsievert per hour. (1
microsievert = 0.000001 sievert = 0.001 millisievert)

    2. Temporal variations are generally caused by changes in
meteorological conditions such as rainfall, wind and
barometric pressure.

    3. Spatial variations are generally caused by differences in
the radioactive content of local rock and soil.

    4. The data displayed is provisional. Only limited data
validation has been carried out.
    Climatological Information for 16 Apr
     2003copy right image | Important notices | Privacy policy Last revision date: <17 Apr 2018> 

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