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Bulletin issued at 01:02 HKT 10/May/2018

At 1 a.m. at the Hong Kong Observatory the air temperature was 23 degrees Celsius and the relative humidity 85 per cent.

Strong winds are expected from the east. The public should beware of the possible danger brought by rough seas.

Please be reminded that:

The Strong Monsoon Signal has been issued.

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 23 degrees;
Tai Po 23 degrees;
Sha Tin 23 degrees;
Tuen Mun 23 degrees;
Tseung Kwan O 23 degrees;
Sai Kung 24 degrees;
Cheung Chau 23 degrees;
Chek Lap Kok 24 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 23 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 24 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 10 May

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Local Weather Forecast

Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

Current Weather | Regional Temperature Forecast in HK |  9-day Weather Forecast
UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 00:45 HKT 10/May/2018

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

A trough of low pressure brought showers to the coast of western Guangdong and the northern part of the South China Sea yesterday. Locally, it was cloudy with occasional showers. There were a few thunderstorms at first. More than 5 millimetres of rainfall were recorded in many places, and rainfall even exceeded 20 millimetres over the North District and western part of the New Territories. Under the influence of a strong easterly airstream in the afternoon, local winds strengthened from the east, strong offshore. The easterly airstream will continue to affect the coast of Guangdong today and tomorrow. With the trough of low pressure that lingers around the south China coast weakening today, showers will ease off gradually over eastern Guangdong.

Weather forecast for Hong Kong

Cloudy with showers. Showers will ease off gradually later. Temperatures will range between 22 and 25 degrees. Fresh easterly winds, strong offshore.

Outlook : One or two showers on Friday. Brighter over the weekend. Hot early next week.


(The above forecast period is valid up to 23:59 HKT today, 10/05/2018; 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 09/May/2018

GALE WARNING AREAS: HONG KONG, KWANGTUNG, TAIWAN STRAIT, BASHI, PRATAS, BALINTANG AND PARACEL.

GENERAL SITUATION AT 090900 UTC:
TROUGH 19N 107E 22N 114E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 091300 UTC:

HONG KONG= E 6-7, OCNL 8. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL E 2 M. TEMP 22-25 C. =
KWANGTUNG= E TO SE 7-8. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL E TO NE 2-3 M. =
TAIWAN STRAIT= NE 7-8. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL NE 2-3 M. =
BASHI= NE 7-8. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL NE 2-3 M. =
PRATAS= E 7-8. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL E TO NE 2-3 M. =
BALINTANG= E TO NE 7-8. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL NE 2-3 M. =
SCARBOROUGH= E TO NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 2-3 M. =
PARACEL= SE 6-7, OCNL 8. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL E TO NE 2-3 M. =
TONKIN= E TO SE 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL E 2 M. =
DANANG= SE 5-6, OCNL 7. ISOL SHOWERS AND TS. SEA UP TO 4 M. SWELL E 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 23:30 HKT 09/May/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 09 May 2018

    Warnings:
    Gale force winds in all areas.

    Weather Situation:
    An easterly airstream is affecting the south China coastal waters. Meanwhile, a trough of low pressure is bringing unsettled weather to the region.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 6 to 7, occasionally force 8.
    Scattered squally showers and thunderstorms.
    Rough to very rough seas.

    Nan'ao, Shanwei and South of Hong Kong:
    East force 7 to 8.
    Scattered squally showers and thunderstorms.
    Rough to very rough seas.

    Shangchuan Dao:
    East to southeast force 6 to 7, occasionally force 8.
    Scattered squally showers and thunderstorms.
    Rough to very rough seas.

    Outlook for the next 48 hours
    East to southeasterly winds of force 5 to 6, up to force 7 in east. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind east-northeast force 7
      Visibility 9 Kilometres

    Shantou Wind east-northeast force 2
      Visibility 23 Kilometres

    Huangmaozhou Wind east force 7

    Macau Wind east force 4
      Visibility 8 Kilometres

    Xisha Wind south force 2
      Visibility 22 Kilometres

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
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  • Visibility Readings in Hong Kong Waters
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  • Tidal Information

    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 10/MAY/2018
    (Next update at 9:00-9:30 HKT 10/MAY/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     GALE FORCE WINDS, SEV TURB AND SEV GUSTS.
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A STRONG EASTERLY AIRSTREAM IS AFFECTING THE COASTAL AREAS
     OF GUANGDONG. MEANWHILE, A TROUGH OF LOW PRESSURE IS BRINGING
     SHOWERS TO THE COAST OF WESTERN 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:  100/15-20, OCNL 22G32
                  TEMPO VRB/25G35 IN TS
       OFFSHORE:  100/25-30, OCNL 35                   22-27
   B.   2000 FT:  120/25-30, OCNL 35                   19
   C.   5000 FT:  160/20                               17
   D.  10000 FT:  200/10                               10
   E.  18000 FT:  260/25                               MS3
   F.  24000 FT:  280/20                               MS14
   G.  30000 FT:  300/20                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      CLOUDY WITH SHOWERS.  A FEW ISOLATED SQUALLY THUNDERSTORMS 
      LATER.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT  SCT 2000 FT  BKN 8000 FT.  
      TEMPO FEW CB 800 FT  SCT 1500 FT  BKN 4000 FT.
   K. VISIBILITY    : 9 KM.  TEMPO 4000 M IN SHOWERS. 
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 16000 FT      10 DEG. C LEVEL(S) : 9800 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 3.0-5.0 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     FRESH TO STRONG EASTERLY WINDS.  CLOUDY WITH ISOLATED
     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 23:55 HKT on 09 May 18

    VHHK SIGMET 3 VALID 091155/091555 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2018 E11348 - N2030 E11530 - N1848 E11518 - N2000 E11136 - N2054 E11142 - N2018 E11348 TOP FL380 MOV E 10KT WKN= VHHK SIGMET 4 VALID 091555/091955 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1912 E11142 - N1930 E11130 - N2042 E11130 - N2042 E11330 - N1912 E11330 - N1912 E11142 TOP FL400 MOV E 05KT 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 10/May/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     25.7 C
Minimum Air Temperature                     22.8 C
Grass Minimum Temperature                   22.3 C
Relative Humidity                        82 - 93 Percent
Rainfall                                     5.4 mm 
Total rainfall since 1st January           161.7 mm
Against an average of                      425.9 mm

Other Stations                Min                  Max
King's Park                  22.3 C               25.2 C
Wong Chuk Hang               22.7 C               26.1 C
Ta Kwu Ling                  22.2 C               26.2 C
Lau Fau Shan                 22.4 C               26.0 C
Tai Po                       21.8 C               24.6 C
Sha Tin                      22.4 C               25.6 C
Tuen Mun                     23.6 C               27.0 C
Tseung Kwan O                22.0 C               24.9 C
Sai Kung                     22.6 C               25.5 C
Cheung Chau                  23.0 C               25.4 C
Chek Lap Kok                 24.0 C               26.8 C
Tsing Yi                     23.6 C               26.2 C
Shek Kong                    23.2 C               26.2 C
Tsuen Wan Ho Koon            21.9 C               24.8 C
Tsuen Wan Shing Mun Valley   23.1 C               25.6 C
Hong Kong Park               22.6 C               25.7 C
Shau Kei Wan                 22.1 C               25.0 C
Kowloon City                 22.1 C               25.3 C
Happy Valley                 23.2 C               26.0 C
Wong Tai Sin                 22.5 C               25.5 C
Stanley                      23.4 C               25.2 C
Kwun Tong                    22.2 C               25.1 C
Sham Shui Po                 23.6 C               25.9 C
Kai Tak Runway Park          22.9 C               25.7 C
Yuen Long Park               23.7 C               27.2 C
Tai Mei Tuk               21.2 C               24.7 C

Duration of sunshine (King's Park):              0.1 H
The mean UV index recorded at King's Park yesterday was 0.5,
the UV intensity was Low.
The maximum UV index for yesterday was 2.
Sea surface temperature (Waglan Island):        24.5 C 

Yesterday's (09 May 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                             0.09
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                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.13

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 09 May
     2003copy right image | Important notices | Privacy policy Last revision date: <10 May 2018> 

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