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Bulletin issued at 00:31 HKT 30/Aug/2018

At midnight at the Hong Kong Observatory the air temperature was 27 degrees Celsius and the relative humidity 93 per cent.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 4:00 a.m. today. Isolated squally thunderstorms are expected to occur over Hong Kong.
The Landslip Warning has been issued.
The Special Announcement of Flooding in Northern New Territories has been issued.

The air temperatures at other places were:

King's Park 27 degrees;
Wong Chuk Hang 27 degrees;
Ta Kwu Ling 25 degrees;
Lau Fau Shan 25 degrees;
Tai Po 26 degrees;
Sha Tin 27 degrees;
Tuen Mun 26 degrees;
Tseung Kwan O 27 degrees;
Sai Kung 27 degrees;
Cheung Chau 26 degrees;
Chek Lap Kok 28 degrees;
Tsing Yi 27 degrees;
Shek Kong 27 degrees;
Tsuen Wan Ho Koon 26 degrees;
Tsuen Wan Shing Mun Valley 26 degrees;
Hong Kong Park 27 degrees;
Shau Kei Wan 27 degrees;
Kowloon City 27 degrees;
Happy Valley 28 degrees;
Wong Tai Sin 27 degrees;
Stanley 27 degrees;
Kwun Tong 27 degrees;
Sham Shui Po 27 degrees;
Kai Tak Runway Park 27 degrees;
Yuen Long Park 26 degrees;
Tai Mei Tuk 26 degrees.

Between 10:45 and 11:45 p.m., the rainfall recorded in various regions were:

Yuen Long 0 to 14 mm;
Tuen Mun 0 to 7 mm;
Tai Po 1 to 4 mm;
North District 0 to 4 mm;
Tsuen Wan 1 to 2 mm;
Sha Tin 1 to 2 mm;
Eastern District 1 mm;
Sai Kung 0 to 1 mm;
Southern District 0 to 1 mm;
Sham Shui Po 1 mm;
Central & Western District 0 to 1 mm;
Wan Chai 1 mm;
Wong Tai Sin 0 to 1 mm;
Yau Tsim Mong 1 mm;
Islands District 0 to 1 mm;
Kowloon City 1 mm;
Kwai Tsing 1 mm;
Kwun Tong 1 mm.


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


Climatological Information for 30 Aug

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

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Bulletin updated at 00:00 HKT 30/Aug/2018

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

A trough of low pressure brought thundery showers to the coast of Guangdong and the northern part of the South China Sea yesterday. Locally, there were heavy showers and squally thunderstorms. More than 100 millimetres of rainfall were recorded over most parts of the New Territories, and rainfall even exceeded 200 millimetres over Tuen Mun, Yuen Long, Tai Po and North District. An active southwesterly airstream associated with the trough of low pressure will continue to bring heavy showers and squally thunderstorms to the south China coast today.

Weather forecast for Hong Kong (Thursday, 30 Aug 2018)

Cloudy with showers and squally thunderstorms. Showers will be heavy at times. Temperatures will range between 26 and 29 degrees. Moderate to fresh south to southwesterly winds, occasionally strong offshore and on high ground at first.

Outlook : Showers easing off gradually with sunny intervals in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 30/08/2018; 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 29/Aug/2018

GALE WARNING AREA: TAIWAN STRAIT.

GENERAL SITUATION AT 290900 UTC:
TROUGH 21N 108E 22N 113E 25N 118E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 291300 UTC:

HONG KONG= S TO SW 5-6. DOWN TO 1000 M IN HEAVY SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW UP TO 2 M. TEMP 25-29 C. =
KWANGTUNG= S 5-6, UP TO 7 AT FIRST. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 4 M AT FIRST. SWELL SW 2 M. =
TAIWAN STRAIT= S 6-7, OCNL 8 AT FIRST. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 6 M AT FIRST. SWELL SW 2-3 M. =
BASHI= S 5-6. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
PRATAS= S 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL SW 2 M. =
BALINTANG= S 5-6. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
SCARBOROUGH= S 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
PARACEL= S 5-6, OCNL 7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL SW 2 M. =
TONKIN= SW 5-6, OCNL 7. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL S 2 M. =
DANANG= S 5-6, UP TO 7 AT FIRST. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 4 M AT FIRST. SWELL SW 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.


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    • 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 29/Aug/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 29 August 2018

    Warnings:
    Strong winds in all areas.

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South to southwest force 5 to 6.
    Heavy squally showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    South force 5 to 6, up to force 7 at first.
    Scattered heavy squally showers and thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    Southerly winds of force 4 to 5, occasionally force 6. Scattered squally showers and thunderstorms.

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

    Waglan Island Wind south force 5
      Visibility 9 Kilometres

    Shantou Wind east-southeast force 1
      Visibility 25 Kilometres in showers

    Dongsha Wind south-southwest force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind south force 5

    Macau Wind south-southeast force 3
      Visibility 6 Kilometres in rain

    Xisha Wind south-southwest force 3
      Visibility 12 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 17:30 HKT 29/AUG/2018
    (Next update at 01:30 HKT 30/AUG/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS, SEV TURB AND SEV GUSTS.
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A TROUGH OF LOW PRESSURE IS BRINGING UNSETTLED
     WEATHER TO THE SOUTH CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  200/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  210/20-25                            27-24
   B.   2000 FT:  210/20-25G35                         23
   C.   5000 FT:  180/20                               18
   D.  10000 FT:  200/25                               11
   E.  18000 FT:  230/20                               MS3
   F.  24000 FT:  180/10                               MS13
   G.  30000 FT:  160/10                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      CLOUDY WITH SHOWERS AND SQUALLY THUNDERSTORMS.
      SHOWERS WILL BE HEAVY AT TIMES.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1200 FT  SCT 2500 FT  BKN 8000 FT.  TEMPO
      FEW CB 800 FT  SCT 1500 FT  BKN 4000 FT.
   K. VISIBILITY    : 8 KM.  TEMPO 3000 M IN SHOWERS. TEMPO 1500 M IN TS.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 10800 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS, OFFSHORE AND NEAR HILLS
   N. SEA STATE     : 3.0-4.0 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH SOUTH TO SOUTHWESTERLY WINDS,
     OCCASIONALLY STRONG OFFSHORE AND ON HIGH GROUND.
     CLOUDY WITH SHOWERS AND SQUALLY THUNDERSTORMS.
     SHOWERS WILL BE HEAVY AT TIMES.=

    ===================================================================
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 22:28 HKT on 29 Aug 18

    VHHK SIGMET 3 VALID 291030/291430 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N2054 E11306 - N2130 E11130 - N2400 E11730 - N2100 E11730 TOP FL470 MOV NE 10KT NC= VHHK SIGMET 4 VALID 291430/291830 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2112 E11730 - N2054 E11200 - N2130 E11130 - N2400 E11730 - N2112 E11730 TOP FL470 MOV NE 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 30/Aug/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     29.3 C
Minimum Air Temperature                     26.1 C
Grass Minimum Temperature                   25.4 C
Relative Humidity                        78 - 94 Percent
Rainfall                                    23.3 mm 
Total rainfall since 1st January          1576.5 mm
Against an average of                     1887.3 mm

Other Stations                Min                  Max
King's Park                  25.8 C               28.9 C
Wong Chuk Hang               25.2 C               28.3 C
Ta Kwu Ling                  23.9 C               27.5 C
Lau Fau Shan                 24.1 C               27.7 C
Tai Po                       24.6 C               27.6 C
Sha Tin                      25.0 C               30.1 C
Tuen Mun                     24.6 C               29.2 C
Tseung Kwan O                25.4 C               28.7 C
Sai Kung                     25.6 C               29.1 C
Cheung Chau                  25.1 C               28.9 C
Chek Lap Kok                 25.6 C               30.7 C
Tsing Yi                     25.5 C               29.3 C
Shek Kong                    24.2 C               29.3 C
Tsuen Wan Ho Koon            24.3 C               26.4 C
Tsuen Wan Shing Mun Valley   25.1 C               28.5 C
Hong Kong Park               25.4 C               28.2 C
Shau Kei Wan                 25.2 C               29.4 C
Kowloon City                 25.6 C               29.7 C
Happy Valley                 25.9 C               29.6 C
Wong Tai Sin                 25.4 C               29.3 C
Stanley                      26.1 C               28.2 C
Kwun Tong                    25.7 C               29.2 C
Sham Shui Po                 25.7 C               29.7 C
Kai Tak Runway Park          25.8 C               29.6 C
Yuen Long Park               24.4 C               29.5 C
Tai Mei Tuk               24.3 C               28.5 C

Duration of sunshine (King's Park):              0.1 H
The mean UV index recorded at King's Park yesterday was 1,
the UV intensity was Low.
The maximum UV index for yesterday was 4.
 

Yesterday's (29 Aug 2018) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 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                           0.10
Tap Mun                             0.10
Kat O                               0.10
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.13
Sha Tau Kok                         0.12
Kwun Tong                           0.13
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.14
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 29 Aug
     2003copy right image | Important notices | Privacy policy Last revision date: <30 Aug 2018> 

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