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Bulletin issued at 00:02 HKT 17/Sep/2019

At midnight at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 79 per cent.

The air temperatures at other places were:

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


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


Climatological Information for 17 Sep

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 00:00 HKT 17/Sep/2019

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

A relatively dry continental airstream affected southeastern China yesterday. The weather was mainly fine over the region. Locally, it was cloudy with showers and thunderstorms yesterday morning. More than 10 millimetres of rainfall were recorded in many places. It was mainly fine and hot during the day. A ridge of high pressure is expected to bring a fresh easterly airstream to the coast of Guangdong in the next couple of days.

Weather forecast for Hong Kong (Tuesday, 17 Sep 2019)

Mainly cloudy with a few showers. Isolated thunderstorms at first. Sunny periods during the day. Temperatures will range between 27 and 32 degrees. Moderate east to northeasterly winds.

Outlook : Hot with sunny periods in the following couple of days. Fine and dry over the weekend.


(The above forecast period is valid up to 23:59 HKT today, 17/09/2019; 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 21:00 HKT 16/Sep/2019

N0 WARNING.

GENERAL SITUATION AT 160900 UTC:
AN NORTHEASTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 161300 UTC:

HONG KONG= E TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. TEMP 27-32 C. =
KWANGTUNG= E TO NE 5-6, OCNL 7. ISOL SHOWERS AND TS. SEA UP TO 4 M. =
TAIWAN STRAIT= NE 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. =
BASHI= N TO NE 5-6, OCNL 7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL NE 2 M. =
PRATAS= E TO NE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. SWELL NE 2 M. =
BALINTANG= N TO NE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL NE 2 M. =
SCARBOROUGH= E TO NE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL NE 2 M. =
PARACEL= E TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
TONKIN= E TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= E TO NE 4-5. ISOL 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.


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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 16/Sep/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 16 September 2019

    Warnings:
    Strong winds in Nan'ao and Shanwei.

    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.
    Isolated showers and thunderstorms.
    Moderate seas.

    Nan'ao:
    Northeast force 6 to 7.
    Isolated showers and thunderstorms.
    Moderate to rough seas.

    Shanwei:
    Northeast force 5 to 6.
    Isolated showers and thunderstorms.
    Moderate to rough seas.

    South of Hong Kong and Shangchuan Dao:
    East to northeast force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate 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 27 Kilometres

    Shantou Wind east force 2
      Visibility 28 Kilometres

    Dongsha Wind northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 4

    Xisha Wind north-northeast force 2
      Visibility 22 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 16/SEP/2019
    (Next update at 17:30 HKT 16/SEP/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A NORTHEASTERLY AIRSTREAM IS AFFECTING 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:  070/5-10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  080/10-15                            30-28
   B.   2000 FT:  080/10                               23
   C.   5000 FT:  080/15                               18
   D.  10000 FT:  080/20                               11
   E.  18000 FT:  080/20                               MS1
   F.  24000 FT:  080/20                               MS12
   G.  30000 FT:  120/20                               MS23
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY WITH ISOLATED SHOWERS. ISOLATED
      THUNDERSTORMS AT FIRST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 6000 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: 17500 FT      10 DEG. C LEVEL(S) : 10600 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS.
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 28 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EAST TO NORTHEASTERLY WINDS. SUNNY
     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.

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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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