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Bulletin issued at 01:02 HKT 22/Apr/2018

At 1 a.m. at the Hong Kong Observatory the air temperature was 24 degrees Celsius and the relative humidity 89 per cent.

The air temperatures at other places were:

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


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


Climatological Information for 22 Apr

Regional Weather in Hong Kong

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Bulletin updated at 00:45 HKT 22/Apr/2018

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

The band of clouds covering Guangdong thinned out gradually yesterday. Locally, it was mainly cloudy yesterday. There were sunny periods and one or two isolated showers. A southerly airstream is expected to bring hot weather to the coastal areas of Guangdong today and tomorrow.

Weather forecast for Hong Kong

Mainly cloudy. One or two isolated showers in the morning. The minimum temperature will be about 24 degrees. Hot with sunny periods during the day with a maximum temperature of about 30 degrees. Light to moderate southeasterly winds.

Outlook : Hot with sunny periods on Monday. Thundery showers on Tuesday and weather will improve in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 22/04/2018; 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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Bulletin issued at 21:00 HKT 21/Apr/2018

N0 WARNING.

GENERAL SITUATION AT 210900 UTC:
A SOUTHEASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 211300 UTC:

HONG KONG= SE 4, OCNL 5. ISOL SHOWERS. SEA UP TO 2 M. TEMP 24-30 C. =
KWANGTUNG= E TO SE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
TAIWAN STRAIT= E TO NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
BASHI= E TO SE 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL E UP TO 2 M. =
PRATAS= E TO SE 4-5. ISOL SHOWERS. SEA UP TO 2 M. SWELL E UP TO 2 M. =
BALINTANG= E TO SE 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL E UP TO 2 M. =
SCARBOROUGH= NE 4-5. FINE. SEA UP TO 2 M. SWELL NE UP TO 2 M. =
PARACEL= SE 4-5. FINE. SEA UP TO 2 M. =
TONKIN= S TO SE 5-6. ISOL SHOWERS. SEA 2-3 M. =
DANANG= SE 5, OCNL 6. ISOL SHOWERS. 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.


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    • SOUTH CHINA COASTAL WATERS
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    Bulletin issued at 23:30 HKT 21/Apr/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 21 April 2018

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Southeast force 4, occasionally force 5.
    Isolated showers.
    Moderate seas.

    Nan'ao and Shanwei:
    East to southeast force 4 to 5.
    Moderate seas.

    South of Hong Kong and Shangchuan Dao:
    Southeast force 4 to 5.
    Moderate seas.

    Outlook for the next 48 hours
    South to southeasterly winds of force 4 to 5, occasionally force 6, becoming north to northeasterly winds of force 5 to 6 later. Isolated showers and squally thunderstorms later.

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

    Waglan Island Wind east force 3
      Visibility 6 Kilometres

    Shantou Wind east force 1
      Visibility 15 Kilometres

    Huangmaozhou Wind east force 4

    Macau Wind east-southeast force 2
      Visibility 6 Kilometres

    Xisha Wind east force 2
      Visibility 26 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 22/APR/2018
    (Next update at 9:00-9:30 HKT 22/APR/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A SOUTHEASTERLY 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:  130/10
       OFFSHORE:  110/15-20                            23-29
   B.   2000 FT:  130/15-20                            20
   C.   5000 FT:  200/15                               18
   D.  10000 FT:  240/20                               10
   E.  18000 FT:  250/30                               MS5
   F.  24000 FT:  280/30                               MS15
   G.  30000 FT:  300/60                               MS24
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY.  ONE OR TWO ISOLATED SHOWERS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT  SCT 4000 FT.
   K. VISIBILITY    : 9 KM. TEMPO 4000 M IN SHOWERS.
   L. 0 DEG. C LEVEL: 14000 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD OFFSHORE AND  NEAR HILLS
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 23 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHEASTERLY WINDS.  SUNNY 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

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    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 22/Apr/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     27.5 C
Minimum Air Temperature                     23.0 C
Grass Minimum Temperature                   22.2 C
Relative Humidity                        74 - 89 Percent
Rainfall                                      Trace 
Total rainfall since 1st January           108.9 mm
Against an average of                      283.2 mm

Other Stations                Min                  Max
King's Park                  22.5 C               27.4 C
Wong Chuk Hang               22.9 C               27.7 C
Ta Kwu Ling                  22.3 C               28.8 C
Lau Fau Shan                 21.5 C               28.9 C
Tai Po                       22.6 C               26.3 C
Sha Tin                      22.8 C               26.7 C
Tuen Mun                     22.9 C               28.3 C
Tseung Kwan O                22.1 C               25.1 C
Sai Kung                     22.6 C               25.2 C
Cheung Chau                  22.3 C               27.9 C
Chek Lap Kok                 23.4 C               29.8 C
Tsing Yi                     23.5 C               29.2 C
Shek Kong                    23.4 C               29.8 C
Tsuen Wan Ho Koon            21.7 C               26.8 C
Tsuen Wan Shing Mun Valley   22.9 C               28.1 C
Hong Kong Park               22.6 C               28.2 C
Shau Kei Wan                 22.1 C               25.1 C
Kowloon City                 22.2 C               27.5 C
Happy Valley                 23.0 C               27.9 C
Wong Tai Sin                 22.6 C               26.8 C
Stanley                      22.3 C               25.6 C
Kwun Tong                    22.1 C               26.2 C
Sham Shui Po                 23.1 C               28.6 C
Kai Tak Runway Park          22.8 C               26.2 C
Yuen Long Park               22.3 C               30.5 C
Tai Mei Tuk               22.1 C               27.6 C

Duration of sunshine (King's Park):              4.6 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 10.
Sea surface temperature (Waglan Island):        22.9 C 

Yesterday's (21 Apr 2018) 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                         0.12
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 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 21 Apr
     2003copy right image | Important notices | Privacy policy Last revision date: <22 Apr 2018> 

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