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Bulletin issued at 12:02 HKT 21/Jan/2019

At noon at the Hong Kong Observatory the air temperature was 18 degrees Celsius and the relative humidity 60 per cent.
During the past hour the mean UV Index recorded at King's Park was 3. The intensity of UV radiation was moderate.

The air temperatures at other places were:

King's Park 18 degrees;
Wong Chuk Hang 19 degrees;
Ta Kwu Ling 17 degrees;
Lau Fau Shan 16 degrees;
Tai Po 17 degrees;
Sha Tin 18 degrees;
Tuen Mun 17 degrees;
Tseung Kwan O 20 degrees;
Sai Kung 16 degrees;
Cheung Chau 18 degrees;
Chek Lap Kok 16 degrees;
Tsing Yi 18 degrees;
Shek Kong 18 degrees;
Tsuen Wan Ho Koon 16 degrees;
Tsuen Wan Shing Mun Valley 18 degrees;
Hong Kong Park 19 degrees;
Shau Kei Wan 19 degrees;
Kowloon City 17 degrees;
Happy Valley 20 degrees;
Wong Tai Sin 18 degrees;
Stanley 19 degrees;
Kwun Tong 18 degrees;
Sham Shui Po 19 degrees;
Kai Tak Runway Park 19 degrees;
Yuen Long Park 17 degrees;
Tai Mei Tuk 20 degrees.

No rainfall was recorded at the Hong Kong Observatory between midnight last night and midday today.


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


Climatological Information for 21 Jan

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 11:45 HKT 21/Jan/2019

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

The northeast monsoon is affecting the coastal areas of Guangdong. Locally, temperatures over the territory around noon were generally about five degrees lower than those of yesterday.

Weather forecast for this afternoon and tonight

Dry with sunny periods in the afternoon. Temperatures will drop further tonight. Moderate to fresh northerly winds.

Outlook : Mainly fine and dry for the rest of the week. Cold tomorrow morning and temperatures will rise gradually in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 21/01/2019; 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 21/Jan/2019

GALE WARNING AREAS: KWANGTUNG, TAIWAN STRAIT, BASHI, PRATAS, BALINTANG, SCARBOROUGH AND PARACEL.

GENERAL SITUATION AT 202100 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 210100 UTC:

HONG KONG= N TO NE 6-7. CLD. SEA 3-4 M. SWELL NE 2 M. TEMP 19-12 C. =
KWANGTUNG= N TO NE 7-8. CLD. SEA 4-6 M. SWELL NE 2-3 M. =
TAIWAN STRAIT= N TO NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
BASHI= NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
PRATAS= NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
BALINTANG= NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
SCARBOROUGH= NE 7-8. LGT RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
PARACEL= NE 7-8. CLD. SEA 4-6 M. SWELL NE 2-3 M. =
TONKIN= N TO NE 6-7. CLD. SEA 3-4 M. =
DANANG= N TO NE 6-7. LGT RAIN PATCHES. SEA 3-4 M. SWELL NE 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
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    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

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    Bulletin issued at 12:30 HKT 21/Jan/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 21 January 2019

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

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North to northeast force 5 to 6, occasionally force 7.
    Moderate to rough seas.

    Nan'ao and Shanwei:
    North to northeast force 7 to 8.
    Rough to very rough seas.

    South of Hong Kong and Shangchuan Dao:
    North to northeast force 6 to 7.
    Rough seas.

    Outlook for the next 48 hours
    North to northeasterly winds of force 6 to 7, becoming east to northeasterly winds of force 5 to 6 later.

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

    Waglan Island Wind north force 3
      Visibility 17 Kilometres

    Shantou Wind east-southeast force 1
      Visibility 30 Kilometres

    Huangmaozhou Wind north force 4

    Xisha Wind northeast force 3
      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 12:30 HKT 21/JAN/2019
    (Next update at 17:30 HKT 21/JAN/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 AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  020/10-15
       OFFSHORE:  030/15-20, OCNL 25                   19-14
   B.   2000 FT:  040/15-20                            13
   C.   5000 FT:  050/320                              11
   D.  10000 FT:  270/25                               2
   E.  18000 FT:  270/50                               MS9
   F.  24000 FT:  260/85                               MS12
   G.  30000 FT:  260/85                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      3500-4200 FT.
   I. WEATHER       : 
      MAINLY CLOUDY. SUNNY PERIODS IN THE AFTERNOON.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT SCT 3500 FT.
   K. VISIBILITY    : 7 KM.
   L. 0 DEG. C LEVEL: 11000 FT      10 DEG. C LEVEL(S) : 5600 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE. MOD NEAR HILLS.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 19 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE NORTHERLY WINDS. 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 21/Jan/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     23.4 C
Minimum Air Temperature                     18.1 C
Grass Minimum Temperature                   16.3 C
Relative Humidity                        60 - 91 Percent
Rainfall                                     0.1 mm 
Total rainfall since 1st January             4.7 mm
Against an average of                       14.3 mm

Other Stations                Min                  Max
King's Park                  16.3 C               24.9 C
Wong Chuk Hang               18.0 C               25.4 C
Ta Kwu Ling                  17.4 C               26.6 C
Lau Fau Shan                 17.2 C               23.9 C
Tai Po                       17.0 C               22.8 C
Sha Tin                      17.3 C               25.2 C
Tuen Mun                     17.2 C               25.5 C
Tseung Kwan O                16.3 C               24.4 C
Sai Kung                     17.3 C               23.2 C
Cheung Chau                  17.2 C               24.2 C
Chek Lap Kok                 19.1 C               24.5 C
Tsing Yi                     17.9 C               25.8 C
Shek Kong                    17.5 C               27.0 C
Tsuen Wan Ho Koon            16.8 C               25.6 C
Tsuen Wan Shing Mun Valley   17.7 C               26.0 C
Hong Kong Park               17.6 C               24.5 C
Shau Kei Wan                 16.9 C               23.0 C
Kowloon City                 17.6 C               25.6 C
Happy Valley                 17.5 C               25.4 C
Wong Tai Sin                 18.3 C               25.5 C
Stanley                      17.3 C               23.3 C
Kwun Tong                    17.6 C               23.8 C
Kai Tak Runway Park          18.0 C               23.4 C
Yuen Long Park               17.0 C               26.3 C
Tai Mei Tuk               17.3 C               25.6 C

Duration of sunshine (King's Park):              5.2 H
The mean UV index recorded at King's Park yesterday was 2,
the UV intensity was Low.
The maximum UV index for yesterday was 5.
 

Yesterday's (20 Jan 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                         0.12
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.09
King's Park                         0.15
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 20 Jan
     2003copy right image | Important notices | Privacy policy Last revision date: <21 Jan 2019> 

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