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Bulletin issued at 06:02 HKT 05/Apr/2017

At 6 a.m. at the Hong Kong Observatory the air temperature was 21 degrees Celsius and the relative humidity 86 per cent.

The air temperatures at other places were:

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


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


Climatological Information for 5 Apr

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 05/Apr/2017

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

The northeast monsoon now affecting Guangdong is moderating.

Weather forecast for today

Cloudy periods and coastal mist in the morning and at night. Mainly fine and warm during the day with a maximum temperature of about 26 degrees. Moderate easterly winds.

Outlook : Humid with fog in the next few days, warm during the day.


(The above forecast period is valid up to 23:59 HKT today, 05/04/2017; 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

Weather Information for Aviation

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MARINE FORECAST
Traditional Chinese Simplified Chinese

Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 04/Apr/2017

N0 WARNING.

GENERAL SITUATION AT 040900 UTC:
THE NORTHEAST MONSOON IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 041300 UTC:

HONG KONG= E 4-5, OCNL 6. DOWN TO 4000 M IN MIST PATCHES LATER. SEA UP TO 3 M. SWELL E UP TO 2 M. TEMP 20-26 C. =
KWANGTUNG= E TO NE 5-6. DOWN TO 4000 M IN MIST PATCHES LATER. SEA 2-3 M. SWELL NE 2 M. =
TAIWAN STRAIT= NE 4-5, OCNL 6. FINE. SEA UP TO 3 M. SWELL NE 2 M. =
BASHI= E 5-6, 7 AT FIRST. FINE. SEA 2-3 M, 4 M AT FIRST. SWELL NE 2-3 M. =
PRATAS= E TO NE 5-6. FINE. SEA 2-3 M. SWELL NE 2-3 M. =
BALINTANG= E 5-6, 7 AT FIRST. FINE. SEA 2-3 M, 4 M AT FIRST. SWELL NE 2-3 M. =
SCARBOROUGH= E TO NE 4-5, OCNL 6. FINE. SEA UP TO 3 M. SWELL NE 2-3 M. =
PARACEL= E 4-5, OCNL 6. FINE. ISOL SHOWERS LATER. SEA UP TO 3 M. SWELL NE 2-3 M. =
TONKIN= E TO SE 4-5. DOWN TO 2000 M IN MIST OR RAIN PATCHES. SEA UP TO 2 M. =
DANANG= E TO SE 4-5. DOWN TO 2000 M IN MIST OR RAIN PATCHES. SEA UP TO 2 M. SWELL NE 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 05/Apr/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 05 April 2017

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    The northeast monsoon is affecting the coastal waters of Guangdong.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 4 to 5, occasionally force 6 at first.
    One or two light rain patches and mist.
    Moderate to rough seas.

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

    South of Hong Kong and Shangchuan Dao:
    East force 4 to 5, occasionally force 6.
    Moderate to rough seas.

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

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

    Waglan Island Wind northeast force 4
      Visibility 8 Kilometres

    Shantou Wind west force 1
      Visibility 9 Kilometres

    Dongsha Wind east force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind northeast force 4

    Macau Wind north force 2
      Visibility 3800 Metres in mist

    Xisha Wind east-northeast force 2
      Visibility 21 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 05/APR/2017
    (Next update at 9:00-9:30 HKT 05/APR/2017)
    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:  080/10
       OFFSHORE:  080/15-20                            20-26
   B.   2000 FT:  120/10-15                            15
   C.   5000 FT:  140/10                               12
   D.  10000 FT:  250/20                               10
   E.  18000 FT:  260/20                               MS6
   F.  24000 FT:  260/40                               MS15
   G.  30000 FT:  250/50                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT. SCT 4500 FT
   K. VISIBILITY    : 8 KM.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD OFFSHORE
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 20 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS.  MAINLY FINE.=

    ===================================================================
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 09:55 HKT on 01 Apr 17

    VHHK SIGMET 1 VALID 010200/010600 VHHH- VHHK HONG KONG FIR EMBD TS FCST S OF N1730 TOP FL380 MOV ESE 10KT WKN= VHHK SIGMET 7 VALID 312200/010200 VHHH- VHHK HONG KONG FIR EMBD TS FCST SE OF LINE N1742 E11306 - N1830 E11524 TOP FL380 MOV ESE 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

    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 05/Apr/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     26.0 C
Minimum Air Temperature                     19.3 C
Grass Minimum Temperature                   18.4 C
Relative Humidity                        62 - 85 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January            75.9 mm
Against an average of                      180.7 mm

Other Stations                Min                  Max
King's Park                  18.3 C               25.3 C
Wong Chuk Hang               18.9 C               25.1 C
Ta Kwu Ling                  17.7 C               25.3 C
Lau Fau Shan                 16.7 C               27.4 C
Tai Po                       18.8 C               23.9 C
Sha Tin                      17.9 C               25.0 C
Tuen Mun                     18.1 C               26.5 C
Tseung Kwan O                17.3 C               24.6 C
Sai Kung                     17.8 C               23.3 C
Cheung Chau                  18.7 C               24.7 C
Chek Lap Kok                 19.6 C               26.6 C
Tsing Yi                     19.3 C               26.7 C
Shek Kong                    18.9 C               26.6 C
Tsuen Wan Ho Koon            17.6 C               24.8 C
Tsuen Wan Shing Mun Valley   19.1 C               25.0 C
Hong Kong Park               18.5 C               24.9 C
Shau Kei Wan                 18.0 C               23.9 C
Kowloon City                 18.1 C               26.1 C
Happy Valley                 19.1 C               25.7 C
Wong Tai Sin                 18.7 C               25.5 C
Stanley                      18.6 C               24.4 C
Kwun Tong                    18.3 C               24.2 C
Sham Shui Po                 19.0 C               26.7 C
Kai Tak Runway Park          18.9 C               23.5 C
Yuen Long Park               17.0 C               27.0 C
Tai Mei Tuk               17.8 C               24.8 C

Duration of sunshine (King's Park):              9.9 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 8.
Sea surface temperature (Waglan Island):        20.9 C 

Yesterday's (04 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                             0.08
Kat O                               0.10
Yuen Ng Fan                         0.11
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 04 Apr
     2003copy right image | Important notices | Privacy policy Last revision date: <05 Apr 2017> 

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