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Bulletin issued at 16:02 HKT 17/Sep/2019

At 4 p.m. at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 86 per cent.
During the past hour the mean UV Index recorded at King's Park was 2. The intensity of UV radiation was low.

Announcement on Localised Heavy Rain: Rain was particularly heavy in Lantau Island in Islands District, with more than 70 millimetres of rainfall recorded in the past 1 hour ending at 3:50 p.m. and may cause serious flooding.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 6:30 p.m. today. Thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

King's Park 28 degrees;
Wong Chuk Hang 30 degrees;
Ta Kwu Ling 29 degrees;
Lau Fau Shan 25 degrees;
Tai Po 28 degrees;
Sha Tin 30 degrees;
Tuen Mun 26 degrees;
Tseung Kwan O 29 degrees;
Sai Kung 30 degrees;
Cheung Chau 26 degrees;
Chek Lap Kok 26 degrees;
Tsing Yi 28 degrees;
Shek Kong 29 degrees;
Tsuen Wan Ho Koon 27 degrees;
Tsuen Wan Shing Mun Valley 28 degrees;
Shau Kei Wan 29 degrees;
Kowloon City 28 degrees;
Happy Valley 30 degrees;
Wong Tai Sin 29 degrees;
Stanley 29 degrees;
Kwun Tong 29 degrees;
Sham Shui Po 29 degrees;
Kai Tak Runway Park 30 degrees;
Yuen Long Park 27 degrees;
Tai Mei Tuk 28 degrees.

Between 2:45 and 3:45 p.m., lightning was detected within Lantau, New Territories West, Hong Kong and Kowloon. The rainfall recorded in various regions were:

Islands District 0 to 66 mm;
Tuen Mun 0 to 39 mm;
Wong Tai Sin 3 to 9 mm;
Sha Tin 0 to 5 mm;
Central & Western District 0 to 5 mm;
Kowloon City 0 to 4 mm;
Tsuen Wan 0 to 3 mm;
Yau Tsim Mong 2 to 3 mm;
Kwai Tsing 0 to 2 mm;
North District 0 to 2 mm;
Tai Po 0 to 2 mm;
Kwun Tong 0 to 1 mm.


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


Climatological Information for 17 Sep

Regional Weather in Hong Kong

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

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UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 16:15 HKT 17/Sep/2019

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

Showers are affecting the coast of Guangdong and the northern part of the South China Sea. Locally, more than 20 millimetres of rainfall were recorded over Tuen Mun and Kwai Tsing, and rainfall even exceeded 70 millimetres over parts of Lantau Island in the afternoon. Besides, an area of low pressure is bringing unsettled weather to the seas east of the Luzon Strait.

Weather forecast for tonight and tomorrow

Mainly cloudy with occasional showers. There will be thunderstorms and showers will be heavier over parts of the territory at first. The minimum temperature will be about 27 degrees. Showers will ease off with sunny periods tomorrow. The maximum temperature will be around 32 degrees in the urban areas, and a couple of degrees higher in the New Territories. Moderate east to northeasterly winds, occasionally fresh offshore.

Outlook : Becoming fine and very hot in the following couple of days. Dry over the weekend.


(The above forecast period is valid up to 23:59 HKT tomorrow, 18/09/2019; 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 09:00 HKT 17/Sep/2019

GALE WARNING AREA: TAIWAN STRAIT.

GENERAL SITUATION AT 162100 UTC:
AN NORTHEASTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 170100 UTC:

HONG KONG= E TO NE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. TEMP 32-28 C. =
KWANGTUNG= E TO NE 5-6, OCNL 7. ISOL SHOWERS AND TS. SEA UP TO 4 M. =
TAIWAN STRAIT= NE 6-7, 8 LATER. ISOL SHOWERS AND TS. SEA 3-4 M, 6 M LATER. SWELL NE 3 M. =
BASHI= N TO NE 6-7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 2 M. =
PRATAS= E TO NE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL NE 2 M. =
BALINTANG= N TO NE 6-7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 2 M. =
SCARBOROUGH= N TO NW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL NE 2 M. =
PARACEL= E TO NE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. =
TONKIN= E TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= E TO NE 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

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

    Bulletin issued at 16:30 HKT 17/Sep/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 4:30 p.m. on 17 September 2019

    Warnings:
    Gale force winds in Nan'ao. Strong winds in Hong Kong adjacent waters, Shanwei, south of Hong Kong and Shangchuan Dao.

    Weather Situation:
    An easterly airstream is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 4 to 5, occasionally force 6.
    Showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao:
    Northeast force 6 to 7, up to force 8 later.
    Isolated showers and thunderstorms.
    Rough seas, becoming very rough later.

    Shanwei and South of Hong Kong:
    East to northeast force 5 to 6, occasionally force 7.
    Isolated showers and thunderstorms.
    Moderate to rough seas.

    Shangchuan Dao:
    East to northeast force 4 to 5, occasionally force 6.
    Isolated showers and thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 6 to 7, up to force 8 in east. Isolated showers and thunderstorms.

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

    Waglan Island Wind east force 3
      Visibility 24 Kilometres

    Shantou Wind east-southeast force 2
      Visibility 30 Kilometres

    Dongsha Wind northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind east-southeast force 4

    Xisha Wind north force 3
      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 12:30 HKT 17/SEP/2019
    (Next update at 17:30 HKT 17/SEP/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE WEATHER IS MAINLY FINE OVER SOUTHEASTERN
     CHINA. MEANWHILE, SHOWERS ARE AFFECTING THE
     COAST OF GUANGDONG AND THE NORTHERN PART OF THE
     SOUTH CHINA SEA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  060/10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  080/20                               33-28
   B.   2000 FT:  070/15-20                            23
   C.   5000 FT:  070/15-20                            19
   D.  10000 FT:  020/15                               11
   E.  18000 FT:  050/15                               0
   F.  24000 FT:  100/10                               MS10
   G.  30000 FT:  090/15                               MS21
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      SUNNY INTERVALS AND ISOLATED SHOWERS AND
      THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 3500 FT TEMPO FEW CB 1000 FT
      SCT 2000 FT BKN 5000 FT
   K. VISIBILITY    : 10 KM. TEMPO 4000 M IN SHOWERS. TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 18000 FT      10 DEG. C LEVEL(S) : 10400 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS. MOD OFFSHORE AND  NEAR HILLS
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 29 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EAST TO NORTHEASTERLY WINDS.
     CLOUDY PERIODS AND 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.

    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 17/Sep/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.3 C
Minimum Air Temperature                     26.3 C
Grass Minimum Temperature                   26.5 C
Relative Humidity                        64 - 93 Percent
Rainfall                                     4.3 mm 
Total rainfall since 1st January          2204.4 mm
Against an average of                     2118.7 mm

Other Stations                Min                  Max
King's Park                  26.0 C               32.5 C
Wong Chuk Hang               25.5 C               32.2 C
Ta Kwu Ling                  25.7 C               33.5 C
Lau Fau Shan                 24.9 C               31.8 C
Tai Po                       26.2 C               31.2 C
Sha Tin                      26.2 C               32.7 C
Tuen Mun                     25.2 C               31.5 C
Tseung Kwan O                25.2 C               32.2 C
Sai Kung                     25.9 C               32.0 C
Cheung Chau                  25.2 C               33.5 C
Chek Lap Kok                 25.7 C               31.9 C
Tsing Yi                     25.8 C               32.8 C
Shek Kong                    25.9 C               33.6 C
Tsuen Wan Ho Koon            24.7 C               30.9 C
Tsuen Wan Shing Mun Valley   25.4 C               33.3 C
Shau Kei Wan                 25.0 C               31.3 C
Kowloon City                 25.4 C               33.2 C
Happy Valley                 26.1 C               33.8 C
Wong Tai Sin                 25.6 C               32.8 C
Stanley                      25.4 C               32.1 C
Kwun Tong                    25.5 C               32.0 C
Sham Shui Po                 25.7 C               33.3 C
Kai Tak Runway Park          25.6 C               31.4 C
Yuen Long Park               25.6 C               34.1 C
Tai Mei Tuk               26.2 C               33.5 C

Duration of sunshine (King's Park):              7.4 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 9.
 

Yesterday's (16 Sep 2019) 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                           0.09
Tap Mun                             0.09
Kat O                               0.11
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.10
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 16 Sep
     2003copy right image | Important notices | Privacy policy Last revision date: <17 Sep 2019> 

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