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Bulletin issued at 07:02 HKT 03/May/2018

At 7 a.m. at the Hong Kong Observatory the air temperature was 26 degrees Celsius and the relative humidity 87 per cent.

The air temperatures at other places were:

King's Park 26 degrees;
Wong Chuk Hang 27 degrees;
Ta Kwu Ling 26 degrees;
Tai Po 26 degrees;
Sha Tin 27 degrees;
Tuen Mun 26 degrees;
Tseung Kwan O 26 degrees;
Sai Kung 27 degrees;
Cheung Chau 25 degrees;
Chek Lap Kok 26 degrees;
Tsing Yi 26 degrees;
Shek Kong 26 degrees;
Tsuen Wan Ho Koon 25 degrees;
Tsuen Wan Shing Mun Valley 25 degrees;
Hong Kong Park 26 degrees;
Shau Kei Wan 27 degrees;
Kowloon City 27 degrees;
Happy Valley 27 degrees;
Wong Tai Sin 27 degrees;
Stanley 26 degrees;
Kwun Tong 27 degrees;
Sham Shui Po 27 degrees;
Kai Tak Runway Park 26 degrees;
Yuen Long Park 26 degrees;
Tai Mei Tuk 26 degrees.


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


Climatological Information for 3 May

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 06:45 HKT 03/May/2018

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

A trough of low pressure is bringing showers to Guangdong. Besides, an easterly airstream is expected to affect the coastal areas later today.

Weather forecast for today

Mainly cloudy with a few showers. Visibility relatively low with sunny intervals at first. The maximum temperature will be around 30 degrees. Light winds, strengthening from the east later.

Outlook : Windier tomorrow. Sunny periods over the weekend.


(The above forecast period is valid up to 23:59 HKT today, 03/05/2018; 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 02/May/2018

N0 WARNING.

GENERAL SITUATION AT 020900 UTC:
TROUGH 23N 109E 24N 113E 26N 120E 26N 125E S 10KT.

MARINE FORECAST FOR 24 HOURS FROM 021300 UTC:

HONG KONG= S 4, BEC E TO NE 5-6. A FEW SHOWERS. DOWN TO 4000 M IN MIST PATCHES AT FIRST. SEA BEC 2-3 M. TEMP 25-30 C. =
KWANGTUNG= S 4, BEC E TO NE 5-6. ISOL SHOWERS. SEA BEC 2-3 M. =
TAIWAN STRAIT= S TO SW 4-5, BEC NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M, BEC 3-4 M. =
BASHI= SE 4-5, BEC E TO NE 6-7. FINE. SEA 2 M, BEC 3-4 M. =
PRATAS= SE 4-5, BEC E TO NE 5-6 IN N. FINE. SEA 2 M, BEC 3 M IN N. =
BALINTANG= SE 4-5. FINE. SEA UP TO 2 M. =
SCARBOROUGH= SE 4-5. FINE. SEA UP TO 2 M. =
PARACEL= SE 4-5. FINE. SEA UP TO 2 M. =
TONKIN= SE 4-5. DOWN TO 4000 M IN ISOL SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= S TO SE 4-5. FINE. 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

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    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 05:30 HKT 03/May/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 03 May 2018

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    A southerly airstream is affecting the south China coastal waters, and a trough of low pressure is bringing showers to Guangdong. Besides, an easterly airstream is expected to affect the south China coastal waters later today.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South force 4, becoming east to northeast force 5 to 6.
    A few showers, visibility relatively low at first.
    Moderate seas, becoming rough.

    Nan'ao:
    South force 4, becoming east to northeast force 6 to 7.
    Moderate seas, becoming rough.

    Shanwei and South of Hong Kong:
    South force 4, becoming east to northeast force 5 to 6.
    Moderate seas, becoming rough.

    Shangchuan Dao:
    South force 4, becoming east to northeast force 5 to 6.
    Moderate seas, becoming rough seas.

    Outlook for the next 48 hours
    Easterly winds of force 6 to 7.

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

    Waglan Island Wind west force 1
      Visibility 18 Kilometres

    Shantou Wind northeast force 1
      Visibility 11 Kilometres

    Huangmaozhou Wind northwest force 3

    Macau Wind west force 1
      Visibility 7 Kilometres

    Xisha Wind east-northeast force 2
      Visibility 28 Kilometres

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

    Bulletin issued at 01:30 HKT 03/MAY/2018
    (Next update at 9:00-9:30 HKT 03/MAY/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. MEANWHILE, A TROUGH OF LOW
     PRESSURE OVER INLAND GUANGDONG IS BRINGING
     SHOWERS TO THE REGION AND MOVING SOUTHWARDS
     GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  240/5-10
                  BEC 360/5-10
       OFFSHORE:  240/5-10
                  BEC 360/5-10                         26-31
   B.   2000 FT:  350/10                               24
   C.   5000 FT:  350/10                               20
   D.  10000 FT:  270/10                               11
   E.  18000 FT:  240/20                               MS1
   F.  24000 FT:  230/35                               MS13
   G.  30000 FT:  260/30                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      1800 - 2220 FT
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS. 
      LOCALIZED MIST/HAZE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT
   K. VISIBILITY    : 9 KM. TEMPO 4000 M IN SHOWERS. TEMPO 3500 M IN MIST/HAZE.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 10600 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     FRESH EASTERLY WINDS, OCCASIONALLY STRONG
     OFFSHORE.  MAINLY CLOUDY WITH A FEW SHOWERS.=

    ===================================================================
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 05:20 HKT on 01 May 18

    VHHK SIGMET 1 VALID 302120/010120 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2048 E11324 - N2030 E11130 - N2130 E11130 - N2224 E11330 - N2048 E11324 TOP FL350 MOV ENE 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 03/May/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.8 C
Minimum Air Temperature                     25.6 C
Grass Minimum Temperature                   23.7 C
Relative Humidity                        58 - 89 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January           117.5 mm
Against an average of                      357.8 mm

Other Stations                Min                  Max
King's Park                  25.0 C               31.4 C
Wong Chuk Hang               24.8 C               30.4 C
Ta Kwu Ling                  22.5 C               33.7 C
Sha Tin                      24.5 C               32.2 C
Tuen Mun                     24.0 C               32.6 C
Tseung Kwan O                23.3 C               33.4 C
Sai Kung                     24.0 C               31.2 C
Cheung Chau                  24.3 C               31.9 C
Chek Lap Kok                 25.3 C               33.0 C
Tsing Yi                     24.7 C               31.4 C
Shek Kong                    23.9 C               33.5 C
Tsuen Wan Ho Koon            24.1 C               30.7 C
Tsuen Wan Shing Mun Valley   25.1 C               31.7 C
Hong Kong Park               25.1 C               31.7 C
Shau Kei Wan                 24.8 C               32.9 C
Kowloon City                 24.8 C               32.5 C
Happy Valley                 25.9 C               31.7 C
Wong Tai Sin                 25.4 C               31.9 C
Stanley                      24.6 C               29.1 C
Kwun Tong                    25.3 C               33.0 C
Sham Shui Po                 25.0 C               31.2 C
Kai Tak Runway Park          24.9 C               32.6 C
Yuen Long Park               23.8 C               33.4 C
Tai Mei Tuk               24.1 C               34.7 C

Duration of sunshine (King's Park):              10.4 H
The mean UV index recorded at King's Park yesterday was 6,
the UV intensity was High.
The maximum UV index for yesterday was 11.
Sea surface temperature (Waglan Island):        24.3 C 

Yesterday's (02 May 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                           0.11
Sai Wan Ho                          0.08
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 02 May
     2003copy right image | Important notices | Privacy policy Last revision date: <03 May 2018> 

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