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Bulletin issued at 06:02 HKT 22/May/2019

At 6 a.m. at the Hong Kong Observatory the air temperature was 23 degrees Celsius and the relative humidity 89 per cent.

The air temperatures at other places were:

King's Park 23 degrees;
Wong Chuk Hang 23 degrees;
Ta Kwu Ling 23 degrees;
Lau Fau Shan 22 degrees;
Tai Po 23 degrees;
Sha Tin 23 degrees;
Tuen Mun 23 degrees;
Tseung Kwan O 22 degrees;
Sai Kung 23 degrees;
Cheung Chau 22 degrees;
Chek Lap Kok 25 degrees;
Tsing Yi 24 degrees;
Shek Kong 23 degrees;
Tsuen Wan Ho Koon 22 degrees;
Tsuen Wan Shing Mun Valley 23 degrees;
Hong Kong Park 22 degrees;
Shau Kei Wan 23 degrees;
Kowloon City 23 degrees;
Happy Valley 23 degrees;
Wong Tai Sin 23 degrees;
Stanley 23 degrees;
Kwun Tong 23 degrees;
Sham Shui Po 23 degrees;
Kai Tak Runway Park 23 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 May

Regional Weather in Hong Kong

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Bulletin updated at 05:45 HKT 22/May/2019

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

Showers associated with a trough of low pressure are affecting the coast of Guangdong and the northern part of the South China Sea.

Weather forecast for today

Mainly cloudy with occasional showers. Isolated thunderstorms later. The maximum temperature will be about 26 degrees. Moderate easterly winds, occasionally fresh offshore.

Outlook : Occasional showers in the next few days.


(The above forecast period is valid up to 23:59 HKT today, 22/05/2019; 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 21/May/2019

N0 WARNING.

GENERAL SITUATION AT 210900 UTC:
TROUGH 19N 105E 21N 114E 21N 118E QSTNR

MARINE FORECAST FOR 24 HOURS FROM 211300 UTC:

HONG KONG= E 4-5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M. TEMP 23-26 C. =
KWANGTUNG= E TO NE 4-5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL NE 2 M. =
TAIWAN STRAIT= NE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. SWELL NE 2 M. =
BASHI= E TO NE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. SWELL NE 2-3 M. =
PRATAS= E TO NE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL NE 2 M. =
BALINTANG= E TO NE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. SWELL NE 2-3 M. =
SCARBOROUGH= W TO NW 4. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SWELL NE 2 M. =
PARACEL= S 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
TONKIN= E TO NE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= S TO SE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. 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 05:30 HKT 22/May/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 22 May 2019

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    A trough of low pressure is bringing thundery showers to the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 4 to 5, occasionally force 6.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao and Shanwei:
    East to northeast force 4 to 5, occasionally force 6.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

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

    Outlook for the next 48 hours
    East to southeasterly winds of force 4 to 5. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind east-northeast force 4
      Visibility 4200 Metres

    Shantou Wind northeast force 1
      Visibility 30 Kilometres

    Huangmaozhou Wind east-northeast force 5

    Macau Wind east force 3
      Visibility 6 Kilometres

    Xisha Wind southeast force 2
      Visibility 21 Kilometres

  • Explanation of Seas or Sea Waves
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  • Visibility Readings in Hong Kong Waters
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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/MAY/2019
    (Next update at 9:00-9:30 HKT 22/MAY/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THUNDERY SHOWERS ASSOCIATED WITH A TROUGH OF LOW PRESSURE IS
     AFFECTING THE COAST OF GUANGDONG AND THE NORTHERN PART OF THE
     SOUTH CHINA SEA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  090/15-20                            23-27
   B.   2000 FT:  120/15-20                            19
   C.   5000 FT:  220/15                               18
   D.  10000 FT:  260/15                               11
   E.  18000 FT:  300/15                               MS3
   F.  24000 FT:  300/20                               MS12
   G.  30000 FT:  280/20                               MS23
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2000-2900 FT
   I. WEATHER       : 
      MAINLY CLOUDY WITH SHOWERS AND A FEW SQUALLY THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT SCT 2500 FT. TEMPO FEW CB 800 FT
      SCT 1500 FT BKN 4000 FT.
   K. VISIBILITY    : 9 KM. TEMPO 3500 M IN SHOWERS. TEMPO 2000 M 
                      IN TS.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 10400 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS. MOD AT LOW LEVELS.
   N. SEA STATE     : 1.5-2.5 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EAST TO SOUTHEASTERLY WINDS, OCCASIONALLY FRESH
     OFFSHORE. MAINLY CLOUDY WITH SHOWERS AND ISOLATED THUNDERSTORMS.=

    ===================================================================
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.

    There is no Significant Weather Information (SIGMET)

    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 22/May/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     26.5 C
Minimum Air Temperature                     22.6 C
Grass Minimum Temperature                   23.8 C
Relative Humidity                        69 - 93 Percent
Rainfall                                     3.3 mm 
Total rainfall since 1st January           545.0 mm
Against an average of                      533.2 mm

Other Stations                Min                  Max
King's Park                  21.9 C               25.9 C
Wong Chuk Hang               22.0 C               26.5 C
Ta Kwu Ling                  21.6 C               27.4 C
Lau Fau Shan                 21.8 C               28.1 C
Tai Po                       21.6 C               25.4 C
Sha Tin                      22.7 C               26.6 C
Tuen Mun                     22.5 C               27.0 C
Tseung Kwan O                21.5 C               25.6 C
Sai Kung                     22.5 C               26.1 C
Cheung Chau                  21.8 C               26.4 C
Chek Lap Kok                 23.3 C               28.2 C
Tsing Yi                     22.5 C               27.2 C
Shek Kong                    21.9 C               27.3 C
Tsuen Wan Ho Koon            21.3 C               25.4 C
Tsuen Wan Shing Mun Valley   22.2 C               26.3 C
Hong Kong Park               21.6 C               26.1 C
Shau Kei Wan                 21.3 C               25.2 C
Kowloon City                 22.0 C               26.8 C
Happy Valley                 22.1 C               27.0 C
Wong Tai Sin                 22.4 C               26.6 C
Stanley                      21.6 C               25.9 C
Kwun Tong                    22.3 C               25.8 C
Sham Shui Po                 22.6 C               27.1 C
Kai Tak Runway Park          22.4 C               26.2 C
Yuen Long Park               22.2 C               28.1 C
Tai Mei Tuk               20.8 C               27.8 C

Duration of sunshine (King's Park):              0.2 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.
 

Yesterday's (21 May 2019) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 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                           0.09
Tap Mun                             0.09
Kat O                               0.11
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.11
Sha Tau Kok                         0.10
Kwun Tong                           0.13
Sai Wan Ho                          0.09
King's Park                         0.14
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 21 May
     2003copy right image | Important notices | Privacy policy Last revision date: <22 May 2019> 

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