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Bulletin issued at 00:02 HKT 22/Sep/2019

At midnight at the Hong Kong Observatory the air temperature was 29 degrees Celsius and the relative humidity 38 per cent.

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 26 degrees;
Lau Fau Shan 27 degrees;
Tai Po 29 degrees;
Sha Tin 29 degrees;
Tuen Mun 27 degrees;
Tseung Kwan O 26 degrees;
Sai Kung 29 degrees;
Cheung Chau 26 degrees;
Chek Lap Kok 29 degrees;
Tsing Yi 29 degrees;
Tsuen Wan Ho Koon 25 degrees;
Tsuen Wan Shing Mun Valley 24 degrees;
Hong Kong Park 28 degrees;
Shau Kei Wan 28 degrees;
Kowloon City 28 degrees;
Happy Valley 29 degrees;
Wong Tai Sin 28 degrees;
Stanley 28 degrees;
Kwun Tong 27 degrees;
Sham Shui Po 28 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 27 degrees;
Tai Mei Tuk 27 degrees.


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


Climatological Information for 22 Sep

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 00:00 HKT 22/Sep/2019

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

The northeast monsoon brought fine and dry weather to southern China yesterday. Locally, the weather was fine. It was very dry during the day. The relative humidity over parts of the territory fell below 40 per cent. The northeast monsoon will continue to affect southern China today and tomorrow. Temperature difference between day and night over the region will be relatively large.

Besides, Tropical Cyclone Tapah intensified from a severe tropical storm into a typhoon yesterday. At 11 p.m. last night, Tapah was centred about 750 kilometres south-southwest of Busan. It is forecast to move north-northeast at about 30 kilometres per hour across the East China Sea towards the vicinity of the Korean Peninsula to Kyushu of Japan.

Weather forecast for Hong Kong (Sunday, 22 Sep 2019)

It will be fine. The minimum temperature will be about 25 degrees in the urban areas, and a few degrees lower in the New Territories. Very dry during the day. The maximum temperature will be around 31 degrees. Moderate to fresh northerly winds, occasionally strong offshore and on high ground.

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


(The above forecast period is valid up to 23:59 HKT today, 22/09/2019; 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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Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 21/Sep/2019

N0 WARNING.

GENERAL SITUATION AT 210900 UTC:
THE NORTHEAST MONSOON IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 211300 UTC:

HONG KONG= N 5-6. FINE. SEA 2-3 M. SWELL NE 2 M. TEMP 25-31 C. =
KWANGTUNG= N TO NE 5-6. FINE. SEA 2-3 M. SWELL NE 2 M. =
TAIWAN STRAIT= N TO NW 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL NE 3-4 M. =
BASHI= NW 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL NE 2-3 M, NW 2 M. =
PRATAS= N TO NW 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL NE 2-3 M, NW 2 M. =
BALINTANG= NW 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL NE 2-3 M, NW 2 M. =
SCARBOROUGH= W TO NW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL NE 2-3 M. =
PARACEL= N TO NE 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL NE 2 M. =
TONKIN= N TO NE 5-6. ISOL SHOWERS. SEA 2-3 M. =
DANANG= N TO 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

    Current Weather | Local Weather Forecast | Regional Temperature Forecast in HK
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    Bulletin issued at 23:30 HKT 21/Sep/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 21 September 2019

    Warnings:
    Strong winds in all areas.

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

    At 11 p.m., Typhoon Tapah with maximum sustained winds of about 120 kilometres per hour near its centre was located at 28.9 degrees north, 125.8 degrees east. It is forecast to move north-northeast at about 30 kilometres per hour across the East China Sea towards the vicinity of the Korean Peninsula to Kyushu of Japan.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North force 5 to 6.
    Moderate to rough seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    North 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 north force 4
      Visibility 50 Kilometres or above

    Shantou Wind west-northwest force 1
      Visibility 30 Kilometres

    Huangmaozhou Wind north-northwest force 4

    Macau Wind north force 3
      Visibility 26 Kilometres

    Xisha Wind north force 2
      Visibility 19 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 21/SEP/2019
    (Next update at 01:30 HKT 22/SEP/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
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:  350/15-20
       OFFSHORE:  350/20-25, OCNL 30                   31-25
   B.   2000 FT:  010/25-30                            23
   C.   5000 FT:  010/25-30                            19
   D.  10000 FT:  350/20                               12
   E.  18000 FT:  340/15                               MS1
   F.  24000 FT:  060/10                               MS14
   G.  30000 FT:  090/10                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      4200-5000 FT
   I. WEATHER       : 
      FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      NO CLOUDS OF HEIGHT AT OR BELOW 10000 FT      
   K. VISIBILITY    : 10 KM
   L. 0 DEG. C LEVEL: 16000 FT      10 DEG. C LEVEL(S) : 11000 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND AT LOW LEVELS
   N. SEA STATE     : 3.0-4.0 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTHERLY WINDS, OCCASIONALLY
     STRONG OFFSHORE AND ON HIGH GROUNDS. FINE.=

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

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

Hong Kong Observatory
Maximum Air Temperature                     32.5 C
Minimum Air Temperature                     26.5 C
Grass Minimum Temperature                   22.6 C
Relative Humidity                        35 - 50 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2233.2 mm
Against an average of                     2165.7 mm

Other Stations                Min                  Max
King's Park                  26.6 C               31.6 C
Wong Chuk Hang               23.3 C               32.1 C
Ta Kwu Ling                  18.5 C               31.9 C
Lau Fau Shan                 25.8 C               30.7 C
Tai Po                       23.1 C               30.9 C
Sha Tin                      26.9 C               32.1 C
Tuen Mun                     25.1 C               31.5 C
Tseung Kwan O                22.9 C               32.4 C
Sai Kung                     26.1 C               31.3 C
Cheung Chau                  24.0 C               31.4 C
Chek Lap Kok                 27.0 C               31.8 C
Tsing Yi                     24.9 C               32.1 C
Tsuen Wan Ho Koon            22.9 C               30.2 C
Tsuen Wan Shing Mun Valley   21.4 C               32.4 C
Hong Kong Park               25.7 C               32.4 C
Shau Kei Wan                 26.4 C               31.8 C
Kowloon City                 26.5 C               32.2 C
Happy Valley                 24.7 C               33.8 C
Wong Tai Sin                 24.7 C               32.6 C
Stanley                      25.4 C               33.4 C
Kwun Tong                    26.2 C               32.1 C
Sham Shui Po                 25.3 C               32.2 C
Kai Tak Runway Park          26.7 C               32.4 C
Yuen Long Park               21.4 C               32.6 C
Tai Mei Tuk               25.9 C               32.4 C

Duration of sunshine (King's Park):              11.1 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 (21 Sep 2019) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 to
0.15 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                           0.13
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.15

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 21 Sep
     2003copy right image | Important notices | Privacy policy Last revision date: <22 Sep 2019> 

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