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Bulletin issued at 13:02 HKT 31/Jan/2018

At 1 p.m. at the Hong Kong Observatory the air temperature was 9 degrees Celsius and the relative humidity 91 per cent.
During the past hour the mean UV Index recorded at King's Park was 1. The intensity of UV radiation was low.

Please be reminded that:

The Cold Weather Warning is now in force. Cold weather might cause adverse health effects. Members of the public should take care to keep warm.

The air temperatures at other places were:

King's Park 9 degrees;
Wong Chuk Hang 10 degrees;
Ta Kwu Ling 8 degrees;
Lau Fau Shan 7 degrees;
Tai Po 7 degrees;
Sha Tin 8 degrees;
Tuen Mun 8 degrees;
Tseung Kwan O 8 degrees;
Sai Kung 9 degrees;
Cheung Chau 8 degrees;
Chek Lap Kok 8 degrees;
Tsing Yi 9 degrees;
Shek Kong 8 degrees;
Tsuen Wan Ho Koon 8 degrees;
Tsuen Wan Shing Mun Valley 9 degrees;
Hong Kong Park 9 degrees;
Shau Kei Wan 8 degrees;
Kowloon City 8 degrees;
Happy Valley 10 degrees;
Wong Tai Sin 8 degrees;
Stanley 9 degrees;
Kwun Tong 9 degrees;
Sham Shui Po 9 degrees;
Kai Tak Runway Park 9 degrees;
Yuen Long Park 7 degrees;
Tai Mei Tuk 8 degrees.

Between 11:45 a.m. and 12:45 p.m., the rainfall recorded in various regions were:

Islands District 0 to 4 mm;
Southern District 2 to 4 mm;
Wan Chai 2 to 3 mm;
Kwai Tsing 1 to 2 mm;
Eastern District 1 to 2 mm;
Sai Kung 0 to 2 mm;
Tsuen Wan 0 to 2 mm;
North District 1 to 2 mm;
Central & Western District 1 to 2 mm;
Tai Po 0 to 2 mm;
Yau Tsim Mong 1 to 2 mm;
Yuen Long 1 to 2 mm;
Tuen Mun 1 to 2 mm;
Kowloon City 1 to 2 mm;
Wong Tai Sin 1 mm;
Sha Tin 0 to 1 mm;
Sham Shui Po 1 mm;
Kwun Tong 1 mm.


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


Climatological Information for 31 Jan

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Bulletin updated at 12:45 HKT 31/Jan/2018

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

An intense winter monsoon persists to bring cold weather to the coast of Guangdong. Meanwhile, a broad band of rain and clouds is covering southern China.

Weather forecast for this afternoon and tonight

Cold and cloudy with occasional rain. Moderate to fresh northerly winds, occasionally strong offshore and on high ground.

Outlook : Becoming fine and dry with relatively large temperature difference between day and night in the next few days. The cold spell will persist to the latter part of next week.


(The above forecast period is valid up to 23:59 HKT today, 31/01/2018; 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 31/Jan/2018

GALE WARNING AREAS: HONG KONG, KWANGTUNG, TAIWAN STRAIT, BASHI, PRATAS, BALINTANG, SCARBOROUGH, PARACEL, TONKIN AND DANANG.

GENERAL SITUATION AT 302100 UTC:
AN INTENSE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 310100 UTC:

HONG KONG= N 6-7, OCNL 8. RAIN PATCHES. SEA UP TO 6 M. SWELL NE 2 M. TEMP 11-8 C. =
KWANGTUNG= N TO NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
TAIWAN STRAIT= NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 3 M. =
BASHI= NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 3 M. =
PRATAS= N TO NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 3 M. =
BALINTANG= NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 3 M. =
SCARBOROUGH= NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
PARACEL= N TO NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
TONKIN= N 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
DANANG= N TO NE 7-8. RAIN PATCHES. SEA 4-6 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.


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    • SOUTH CHINA COASTAL WATERS
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    Bulletin issued at 12:30 HKT 31/Jan/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 31 January 2018

    Warnings:
    Gale force winds in all areas.

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North force 6 to 7, occasionally force 8.
    Occasional rain.
    Rough to very rough seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    North force 7 to 8.
    Rough to very rough seas.

    Outlook for the next 48 hours
    North to northeasterly winds of force 6 to 7, occasionally force 8.

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

    Waglan Island Wind north force 5
      Visibility 16 Kilometres

    Shantou Wind east-northeast force 1
      Visibility 7 Kilometres in rain

    Dongsha Wind east-northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind north-northwest force 6

    Macau Wind north force 3
      Visibility 2400 Metres in rain

    Xisha Wind northeast force 2
      Visibility 24 Kilometres

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    • TROPICAL CYCLONE WARNING FOR SHIPPING
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    Tropical Cyclone Warning for Shipping

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    Bulletin issued at 15:30 HKT 04/Jan/2018


    Tropical Cyclone Warning

    At 040600 UTC, Tropical Depression Bolaven (1801) has weakened into an area of low pressure.

    No further warnings on this area of low pressure will be issued by the Hong Kong Observatory unless regeneration takes place.



    The Hong Kong Observatory's tropical cyclone warnings for shipping are issued about one and a half hours after the time of observation. They incorporate additional information derived from surface and upper-air data and may therefore be slightly different from the real-time satellite or radar-based positions given in the hourly bulletins for public.

    While the forecast positions and track indicate the most likely future path of the tropical cyclone, they may deviate from the actual path taken by the storm.

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    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 31/Jan/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     11.0 C
Minimum Air Temperature                      8.9 C
Grass Minimum Temperature                   10.2 C
Relative Humidity                        77 - 89 Percent
Rainfall                                     0.2 mm 
Total rainfall since 1st January            42.9 mm
Against an average of                       24.4 mm

Other Stations                Min                  Max
King's Park                   7.8 C               10.6 C
Wong Chuk Hang                9.2 C               11.4 C
Ta Kwu Ling                   4.9 C               7.5 C
Lau Fau Shan                  5.5 C               8.2 C
Tai Po                        5.7 C               8.1 C
Sha Tin                       6.7 C               9.3 C
Tuen Mun                      6.2 C               8.6 C
Tseung Kwan O                 7.4 C               9.9 C
Sai Kung                      7.1 C               9.9 C
Cheung Chau                   7.1 C               9.9 C
Chek Lap Kok                  6.9 C               9.8 C
Tsing Yi                      7.6 C               10.8 C
Shek Kong                     5.9 C               8.2 C
Tsuen Wan Ho Koon             5.0 C               9.8 C
Tsuen Wan Shing Mun Valley    7.1 C               10.8 C
Hong Kong Park                8.7 C               10.8 C
Shau Kei Wan                  7.8 C               9.8 C
Kowloon City                  7.1 C               9.9 C
Happy Valley                  9.3 C               10.8 C
Wong Tai Sin                  7.2 C               10.5 C
Stanley                       9.1 C               10.8 C
Kwun Tong                     7.7 C               9.7 C
Sham Shui Po                  7.7 C               10.1 C
Kai Tak Runway Park           8.5 C               11.0 C
Yuen Long Park                5.5 C               7.9 C
Tai Mei Tuk                6.7 C               9.4 C

Duration of sunshine (King's Park):              0 H
The mean UV index recorded at King's Park yesterday was 0.5,
the UV intensity was Low.
The maximum UV index for yesterday was 1.
Sea surface temperature (Waglan Island):        16.7 C 

Yesterday's (30 Jan 2018) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 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                           0.08
Tap Mun                             0.09
Kat O                               0.10
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.12
Sha Tau Kok                         0.11
Kwun Tong                           0.12
Sai Wan Ho                          0.10
King's Park                         0.15
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.14
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 30 Jan
     2003copy right image | Important notices | Privacy policy Last revision date: <31 Jan 2018> 

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