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Bulletin issued at 03:02 HKT 13/Apr/2018

At 3 a.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 89 per cent.

The air temperatures at other places were:

King's Park 24 degrees;
Wong Chuk Hang 24 degrees;
Ta Kwu Ling 25 degrees;
Lau Fau Shan 25 degrees;
Tai Po 24 degrees;
Sha Tin 25 degrees;
Tuen Mun 25 degrees;
Tseung Kwan O 24 degrees;
Sai Kung 24 degrees;
Cheung Chau 23 degrees;
Chek Lap Kok 26 degrees;
Tsing Yi 25 degrees;
Shek Kong 26 degrees;
Tsuen Wan Ho Koon 24 degrees;
Tsuen Wan Shing Mun Valley 25 degrees;
Hong Kong Park 25 degrees;
Shau Kei Wan 24 degrees;
Kowloon City 24 degrees;
Happy Valley 25 degrees;
Wong Tai Sin 25 degrees;
Stanley 24 degrees;
Kwun Tong 24 degrees;
Sham Shui Po 25 degrees;
Kai Tak Runway Park 24 degrees;
Yuen Long Park 25 degrees;
Tai Mei Tuk 24 degrees.


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


Climatological Information for 13 Apr

Regional Weather in Hong Kong

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Bulletin updated at 02:45 HKT 13/Apr/2018

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

A southerly airstream is affecting the coastal areas of Guangdong.

Weather forecast for today

Cloudy periods. The minimum temperature will be about 24 degrees. Mainly fine and hot during the day with a maximum temperature of around 30 degrees. Light to moderate southerly winds.

Outlook : Hot with sunny periods on Saturday. Temperatures falling on Sunday. More showers early next week and there will be thunderstorms.


(The above forecast period is valid up to 23:59 HKT today, 13/04/2018; 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 12/Apr/2018

N0 WARNING.

GENERAL SITUATION AT 120900 UTC:
A SOUTHERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 121300 UTC:

HONG KONG= S 3-4. DOWN TO 4000 M IN MIST PATCHES. TEMP 24-30 C. =
KWANGTUNG= S TO SE 4, OCNL 5. DOWN TO 2000 M IN MIST PATCHES. ISOL SHOWERS. SEA UP TO 2 M. =
TAIWAN STRAIT= S TO SE 4, OCNL 5. DOWN TO 2000 M IN MIST PATCHES. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
BASHI= S TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
PRATAS= S TO SE 4. FINE. =
BALINTANG= S TO SE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
SCARBOROUGH= S TO SE 4. FINE. =
PARACEL= S TO SE 4, OCNL 5. DOWN TO 2000 M IN MIST OR LGT RAIN PATCHES IN N. SEA UP TO 2 M. =
TONKIN= S 4-5, OCNL 6. DOWN TO 2000 M IN MIST OR LGT RAIN PATCHES. SEA UP TO 3 M. =
DANANG= S TO SE 4-5, OCNL 6. DOWN TO 2000 M IN MIST OR LGT 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
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    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

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    Bulletin issued at 03:30 HKT 13/Apr/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 13 April 2018

    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.
    Mist patches.
    Slight to moderate seas.

    Nan'ao and Shanwei:
    South to southeast force 4.
    Moderate seas.

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

    Outlook for the next 48 hours
    Southerly winds of force 4 to 5, becoming north to northeasterly winds of force 6. Isolated showers and thunderstorms.

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

    Waglan Island Wind east-southeast force 3
      Visibility 13 Kilometres

    Shantou Wind south-southeast force 1
      Visibility 17 Kilometres

    Huangmaozhou Wind southeast force 3

    Macau Wind south-southeast force 2
      Visibility 7 Kilometres

    Xisha Wind southeast force 1
      Visibility 18 Kilometres

  • Explanation of Seas or Sea Waves
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 13/APR/2018
    (Next update at 9:00-9:30 HKT 13/APR/2018)
    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:  150/5-10
       OFFSHORE:  150/10-15                            24-31
   B.   2000 FT:  180/15-20                            20
   C.   5000 FT:  220/20                               17
   D.  10000 FT:  240/25                               11
   E.  18000 FT:  270/40                               MS3
   F.  24000 FT:  270/45                               MS15
   G.  30000 FT:  290/60                               MS29
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      4800-5000 FT
   I. WEATHER       : 
      CLOUDY PERIODS. MAINLY FINE DURING THE DAY.
      LOCALISED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3000 FT
   K. VISIBILITY    : 9 KM. TEMPO 4000 M IN MIST.
   L. 0 DEG. C LEVEL(S) : 14500, 16500 FT  10 DEG. C LEVEL(S) : 10400 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 23 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE SOUTHERLY WINDS. CLOUDY
     PERIODS. MAINLY FINE DURING THE DAY.=

    ===================================================================
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 14:15 HKT on 07 Apr 18

    VHHK SIGMET 1 VALID 070615/071015 VHHH- VHHK HONG KONG FIR SEV ICE OBS N OF N2030 AND E OF E11230 FL140/200 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

    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 13/Apr/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     28.1 C
Minimum Air Temperature                     23.9 C
Grass Minimum Temperature                   22.6 C
Relative Humidity                        68 - 89 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January            89.4 mm
Against an average of                      238.7 mm

Other Stations                Min                  Max
King's Park                  23.2 C               28.2 C
Wong Chuk Hang               22.7 C               27.3 C
Ta Kwu Ling                  22.9 C               29.2 C
Lau Fau Shan                 22.5 C               28.1 C
Tai Po                       22.6 C               28.3 C
Sha Tin                      22.6 C               28.4 C
Tuen Mun                     23.3 C               27.6 C
Tseung Kwan O                22.6 C               28.2 C
Sai Kung                     22.7 C               25.5 C
Cheung Chau                  22.5 C               27.3 C
Chek Lap Kok                 24.0 C               30.6 C
Tsing Yi                     23.3 C               28.2 C
Shek Kong                    22.6 C               29.6 C
Tsuen Wan Ho Koon            22.1 C               26.8 C
Tsuen Wan Shing Mun Valley   22.7 C               28.4 C
Hong Kong Park               23.1 C               26.6 C
Shau Kei Wan                 22.6 C               27.3 C
Kowloon City                 23.2 C               28.9 C
Happy Valley                 23.2 C               28.6 C
Wong Tai Sin                 23.5 C               28.1 C
Stanley                      23.0 C               27.3 C
Kwun Tong                    23.0 C               28.9 C
Sham Shui Po                 23.6 C               27.8 C
Kai Tak Runway Park          23.3 C               27.6 C
Yuen Long Park               22.8 C               28.6 C
Tai Mei Tuk               22.5 C               28.8 C

Duration of sunshine (King's Park):              5.3 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 4.
Sea surface temperature (Waglan Island):        23.6 C 

Yesterday's (12 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                               0.10
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                         0.15
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 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 12 Apr
     2003copy right image | Important notices | Privacy policy Last revision date: <13 Apr 2018> 

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