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Bulletin issued at 18:02 HKT 23/Sep/2019

At 6 p.m. at the Hong Kong Observatory the air temperature was 28 degrees Celsius and the relative humidity 68 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.1. The intensity of UV radiation was low.

Please be reminded that:

The Fire Danger Warning is Red and the fire risk is extreme.

The air temperatures at other places were:

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


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


Climatological Information for 23 Sep

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

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UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 17:45 HKT 23/Sep/2019

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

The northeast monsoon is bringing generally fine and dry weather to southern China.

Weather forecast for tonight and tomorrow

Mainly fine. Cloudy periods and one or two light rain patches tonight and tomorrow morning. The minimum temperature will be about 25 degrees. The maximum temperature during the day will be around 30 degrees. Moderate easterly winds, occasionally fresh offshore at first.

Outlook : Mainly fine with relatively large temperature difference between day and night in the following few days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 24/09/2019; 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 23/Sep/2019

N0 WARNING.

GENERAL SITUATION AT 222100 UTC:
THE NORTHEAST MONSOON IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 230100 UTC:

HONG KONG= E TO NE 5-6. A FEW RAIN PATCHES. SEA 2-3 M. SWELL NE 2 M. TEMP 31-25 C. =
KWANGTUNG= E TO NE 5-6. RAIN PATCHES. SEA 2-3 M. SWELL NE 2 M. =
TAIWAN STRAIT= NE 5-6, OCNL 7. CLOUDY. SEA UP TO 4 M. SWELL NE 3 M. =
BASHI= NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. SWELL NE 2-3 M. =
PRATAS= E TO NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. SWELL NE 2-3 M. =
BALINTANG= NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. SWELL NE 2-3 M. =
SCARBOROUGH= E TO NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
PARACEL= E TO NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
TONKIN= N TO NE 5-6. FINE. SEA 2-3 M. =
DANANG= NE 5-6. ISOL SHOWERS. SEA 2-3 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 23/Sep/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 4:30 p.m. on 23 September 2019

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    The northeast monsoon is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 5 to 6.
    One or two rain patches.
    Moderate to rough seas.

    Nan'ao and Shangchuan Dao:
    Northeast force 5 to 6.
    Moderate to rough seas.

    Shanwei and South of Hong Kong:
    East to northeast force 5 to 6.
    Moderate to rough seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 5 to 6.

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

    Waglan Island Wind east-northeast force 4
      Visibility 43 Kilometres

    Shantou Wind south-southeast force 2
      Visibility 30 Kilometres

    Huangmaozhou Wind east force 6

    Macau Wind north-northeast force 2
      Visibility 23 Kilometres

    Xisha Wind north-northeast force 2
      Visibility 30 Kilometres

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 23/SEP/2019
    (Next update at 01:30 HKT 24/SEP/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON IS BRINGING FINE AND DRY
     WEATHER TO SOUTHERN CHINA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  070/10-15
       OFFSHORE:  070/15-20                            29-25
   B.   2000 FT:  070/15                               22
   C.   5000 FT:  070/15                               16
   D.  10000 FT:  240/10                               11
   E.  18000 FT:  260/10                               MS1
   F.  24000 FT:  080/10                               MS14
   G.  30000 FT:  280/10                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      CLOUDY PERIODS AND ONE OR TWO LIGHT RAIN
      PATCHES.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT SCT 4000 FT
   K. VISIBILITY    : 10 KM. TEMPO 4000M IN RAIN
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 11200 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS
   N. SEA STATE     : 1.5-2.0 M     SEA TEMPERATURE    : 29 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS, OCCASIONALLY FRESH
     OFFSHORE. MAINLY FINE. ONE OR TWO LIGHT RAIN
     PATCHES.=

    ===================================================================
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 23/Sep/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.3 C
Minimum Air Temperature                     25.9 C
Grass Minimum Temperature                   22.4 C
Relative Humidity                        34 - 50 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2233.2 mm
Against an average of                     2172.2 mm

Other Stations                Min                  Max
King's Park                  25.6 C               30.2 C
Wong Chuk Hang               26.0 C               30.9 C
Ta Kwu Ling                  20.4 C               30.8 C
Lau Fau Shan                 24.8 C               29.5 C
Tai Po                       24.6 C               29.6 C
Sha Tin                      26.4 C               30.8 C
Tuen Mun                     25.1 C               30.6 C
Tseung Kwan O                23.7 C               31.1 C
Sai Kung                     26.2 C               29.6 C
Cheung Chau                  23.7 C               30.9 C
Chek Lap Kok                 26.4 C               31.5 C
Tsing Yi                     25.5 C               31.3 C
Tsuen Wan Ho Koon            24.3 C               29.3 C
Tsuen Wan Shing Mun Valley   23.0 C               31.2 C
Hong Kong Park               25.5 C               31.6 C
Shau Kei Wan                 25.6 C               31.5 C
Kowloon City                 25.6 C               30.5 C
Happy Valley                 26.5 C               32.4 C
Wong Tai Sin                 25.7 C               31.7 C
Stanley                      26.2 C               31.9 C
Kwun Tong                    25.5 C               30.3 C
Sham Shui Po                 25.7 C               31.2 C
Kai Tak Runway Park          26.6 C               31.1 C
Yuen Long Park               23.3 C               31.8 C
Tai Mei Tuk               25.0 C               30.3 C

Duration of sunshine (King's Park):              11.2 H
The mean UV index recorded at King's Park yesterday was 5,
the UV intensity was Moderate.
The maximum UV index for yesterday was 9.
 

Yesterday's (22 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                         0.11
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 22 Sep
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