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Bulletin issued at 11:02 HKT 18/Apr/2018

At 11 a.m. at the Hong Kong Observatory the air temperature was 23 degrees Celsius and the relative humidity 77 per cent.
During the past hour the mean UV Index recorded at King's Park was 2. The intensity of UV radiation was low.

The air temperatures at other places were:

King's Park 22 degrees;
Wong Chuk Hang 23 degrees;
Ta Kwu Ling 24 degrees;
Lau Fau Shan 23 degrees;
Tai Po 23 degrees;
Sha Tin 23 degrees;
Tuen Mun 23 degrees;
Tseung Kwan O 21 degrees;
Sai Kung 22 degrees;
Cheung Chau 22 degrees;
Chek Lap Kok 24 degrees;
Tsing Yi 23 degrees;
Shek Kong 24 degrees;
Tsuen Wan Ho Koon 23 degrees;
Tsuen Wan Shing Mun Valley 23 degrees;
Hong Kong Park 23 degrees;
Shau Kei Wan 21 degrees;
Kowloon City 22 degrees;
Happy Valley 23 degrees;
Wong Tai Sin 22 degrees;
Stanley 22 degrees;
Kwun Tong 21 degrees;
Sham Shui Po 23 degrees;
Kai Tak Runway Park 22 degrees;
Yuen Long Park 24 degrees;
Tai Mei Tuk 23 degrees.


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


Climatological Information for 18 Apr

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 10:45 HKT 18/Apr/2018

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

The northeast monsoon now affecting the coast of Guangdong is moderating gradually. Meanwhile, a band of clouds is covering the region.

Weather forecast for today

Mainly cloudy. Bright periods in the afternoon. Moderate easterly winds, occasionally fresh offshore.

Outlook : Sunny intervals tomorrow. One or two showers on Friday. Hot during the weekend.


(The above forecast period is valid up to 23:59 HKT today, 18/04/2018; 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 09:00 HKT 18/Apr/2018

N0 WARNING.

GENERAL SITUATION AT 172100 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 180100 UTC:

HONG KONG= E 4-5, OCNL 6. ISOL SHOWERS. SEA UP TO 3 M. TEMP 25-22 C. =
KWANGTUNG= E TO NE 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL NE UP TO 2 M. =
TAIWAN STRAIT= NE 5-6. CLD. SEA 2-3 M. SWELL NE 2 M. =
BASHI= E TO NE 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL NE 2 M. =
PRATAS= E TO NE 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL NE UP TO 2 M. =
BALINTANG= E TO NE 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL NE 2 M. =
SCARBOROUGH= NE 5-6. FINE. SEA 2-3 M. SWELL NE 2 M. =
PARACEL= E 4-5. DOWN TO 2000 M IN MIST OR RAIN PATCHES. SEA UP TO 2 M. =
TONKIN= E TO NE 4, OCNL 5. DOWN TO 2000 M IN MIST OR RAIN PATCHES. SEA UP TO 2 M. =
DANANG= E TO NE 4-5. ISOL SHOWERS. 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

    Current Weather | Local Weather Forecast | Regional Temperature Forecast in HK
    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 09:30 HKT 18/Apr/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 18 April 2018

    Warnings:
    Strong winds in all areas.

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 4 to 5, occasionally force 6.
    Isolated showers.
    Moderate to rough seas.

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

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

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

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

    Waglan Island Wind east-northeast force 5
      Visibility 13 Kilometres

    Shantou Wind northeast force 1
      Visibility 14 Kilometres

    Huangmaozhou Wind east force 6

    Macau Wind north-northeast force 2
      Visibility 4400 Metres in mist

    Xisha Wind east force 3
      Visibility 20 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 09:30 HKT 18/APR/2018
    (Next update at 12:30 HKT 18/APR/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  080/10
       OFFSHORE:  080/15-20, OCNL 25 AT FIRST          21-25
   B.   2000 FT:  090/10-15                            16
   C.   5000 FT:  230/5                                13
   D.  10000 FT:  260/20                               9
   E.  18000 FT:  260/35                               MS8
   F.  24000 FT:  260/65                               MS18
   G.  30000 FT:  250/70                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY WITH ISOLATED SHOWERS. SUNNY
      INTERVALS IN THE AFTERNOON.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3000 FT
   K. VISIBILITY    : 7 KM. TEMPO 4000 IN SHOWERS
   L. 0 DEG. C LEVEL: 14000 FT      10 DEG. C LEVEL(S) : 6800, 7000,9800 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 23 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS, OCCASIONALLY FRESH
     OFFSHORE. MAINLY CLOUDY.=

    ===================================================================
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 18/Apr/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     22.9 C
Minimum Air Temperature                     17.4 C
Grass Minimum Temperature                   17.9 C
Relative Humidity                        72 - 91 Percent
Rainfall                                     0.2 mm 
Total rainfall since 1st January           108.8 mm
Against an average of                      257.9 mm

Other Stations                Min                  Max
King's Park                  16.9 C               23.3 C
Wong Chuk Hang               17.4 C               22.8 C
Ta Kwu Ling                  14.9 C               24.8 C
Lau Fau Shan                 14.8 C               22.1 C
Tai Po                       15.4 C               21.7 C
Sha Tin                      16.5 C               23.2 C
Tuen Mun                     15.5 C               23.0 C
Tseung Kwan O                16.3 C               21.8 C
Sai Kung                     16.6 C               22.4 C
Cheung Chau                  16.4 C               21.9 C
Chek Lap Kok                 16.6 C               22.8 C
Tsing Yi                     16.9 C               22.9 C
Shek Kong                    15.4 C               24.4 C
Tsuen Wan Ho Koon            15.5 C               21.2 C
Tsuen Wan Shing Mun Valley   16.4 C               23.4 C
Hong Kong Park               17.1 C               22.6 C
Shau Kei Wan                 16.4 C               21.7 C
Kowloon City                 16.4 C               22.8 C
Happy Valley                 17.9 C               22.9 C
Wong Tai Sin                 16.6 C               23.1 C
Stanley                      16.9 C               21.6 C
Kwun Tong                    16.9 C               22.1 C
Sham Shui Po                 16.6 C               23.6 C
Kai Tak Runway Park          17.7 C               22.0 C
Yuen Long Park               15.3 C               24.5 C
Tai Mei Tuk               15.4 C               23.5 C

Duration of sunshine (King's Park):              0.5 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 6.
Sea surface temperature (Waglan Island):        22.6 C 

Yesterday's (17 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                         0.10
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                        0.15

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 17 Apr
     2003copy right image | Important notices | Privacy policy Last revision date: <18 Apr 2018> 

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