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Bulletin issued at 01:02 HKT 03/Jan/2018

At 1 a.m. at the Hong Kong Observatory the air temperature was 18 degrees Celsius and the relative humidity 80 per cent.

The air temperatures at other places were:

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


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


Climatological Information for 3 Jan

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Bulletin updated at 00:45 HKT 03/Jan/2018

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

An easterly airstream affected the coast of Guangdong yesterday. Locally, it was mainly cloudy. The visibility was relatively low in some areas at first. There were sunny intervals during the day. A broad band of clouds is expected to cover the south China coast and the northern part of the South China Sea in the latter part of this week, bringing rainy weather to the region.

Besides, the area of low pressure over the southern part of the Philippines intensified into a tropical depression yesterday. At 11 p.m. last night, the tropical depression was centred about 420 kilometres east-southeast of Nansha Dao. It is forecast to move west at about 30 kilometres per hour across the southern part of the South China Sea.

Weather forecast for Hong Kong

Cloudy in the morning and at night. Mainly fine during the day. Temperatures will range between 17 and 21 degrees. Moderate easterly winds, fresh at times.

Outlook : Becoming cloudy with rain in the latter part of this week. The weather will become cold early next week.


(The above forecast period is valid up to 23:59 HKT today, 03/01/2018; 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 21:00 HKT 02/Jan/2018

GALE WARNING AREAS: BASHI, PRATAS AND BALINTANG.

GENERAL SITUATION AT 020900 UTC:
AN EASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 021300 UTC:

HONG KONG= E 4-5, OCNL 6. FINE. CLOUDY AT FIRST. SEA UP TO 3 M. SWELL E UP TO 2 M. TEMP 17-21 C. =
KWANGTUNG= E TO NE 6-7. LGT RAIN PATCHES. SEA 3-4 M. SWELL E TO NE 2-3 M. =
TAIWAN STRAIT= NE 5-6. FINE. SEA 2-3 M. SWELL NE 2 M. =
BASHI= E 7-8. RAIN PATCHES. SEA 4-6 M. SWELL E TO NE 3-4 M. =
PRATAS= E 6-7, OCNL 8. RAIN PATCHES. SEA UP TO 6 M. SWELL E TO NE 2-3 M. =
BALINTANG= E 7-8. RAIN PATCHES. SEA 4-6 M. SWELL E TO NE 3-4 M. =
SCARBOROUGH= E TO NE 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL NE 3-4 M. =
PARACEL= E TO NE 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL E TO NE 2-3 M. =
TONKIN= E TO NE 5-6. LGT RAIN PATCHES. SEA 2-3 M. SWELL NE 2 M. =
DANANG= E TO NE 5-6. RAIN PATCHES. SEA 2-3 M. SWELL E TO 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

    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 02/Jan/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 02 January 2018

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    An easterly airstream is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 4 to 5, occasionally force 6.
    Moderate to rough seas.

    Nan'ao and Shanwei:
    East to northeast force 6 to 7.
    Rough seas.

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

    Outlook for the next 48 hours
    East to northeasterly winds of force 5 to 6, up to force 7 in east later. Isolated showers and thunderstorms.

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

    Waglan Island Wind northeast force 5
      Visibility 11 Kilometres

    Shantou Wind east-southeast force 1
      Visibility 18 Kilometres

    Dongsha Wind east force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind east-northeast force 4

    Macau Wind east force 2
      Visibility 6 Kilometres

    Xisha Wind east-northeast force 3
      Visibility 10 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 01:30 HKT 03/JAN/2018
    (Next update at 9:00-9:30 HKT 03/JAN/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/10
       OFFSHORE:  090/15-20                            17-23
   B.   2000 FT:  090/15-20, OCNL 25                   15
   C.   5000 FT:  100/15-20                            12
   D.  10000 FT:  280/10                               8
   E.  18000 FT:  240/20                               MS5
   F.  24000 FT:  240/30                               MS17
   G.  30000 FT:  240/35                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2400-3000 FT
   I. WEATHER       : 
      CLOUDY.  LOCALISED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT SCT 5000 FT
   K. VISIBILITY    : 7 KM. TEMPO 4000 M IN MIST.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 6600, 9200, 9800 FT
   M. TURBULENCE    : MOD TO SEV NEAR HILLS. MOD OFFSHORE.
   N. SEA STATE     : 1.5-2.5 M     SEA TEMPERATURE    : 18 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EASTERLY WINDS.  MAINLY FINE
     DURING THE DAY. CLOUDY AT NIGHT.  LOCALISED MIST.=

    ===================================================================
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.

    The latest significant weather information
    issued by the Hong Kong Observatory at 20:11 HKT on 01 Dec 17

    VHHK SIGMET 4 VALID 010820/011220 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1642 E11400 - N1736 E11312 - N1812 E11512 - N1642 E11400 TOP FL450 MOV W 05KT NC= VHHK SIGMET 5 VALID 011220/011620 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1806 E11506 - N1642 E11400 - N1712 E11330 - N1818 E11448 - N1806 E11506 TOP FL420 MOV W 05KT WKN=

    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 03/Jan/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     19.2 C
Minimum Air Temperature                     16.0 C
Grass Minimum Temperature                   14.2 C
Relative Humidity                        68 - 84 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January               0 mm
Against an average of                        0.3 mm

Other Stations                Min                  Max
King's Park                  15.0 C               20.0 C
Wong Chuk Hang               15.4 C               20.0 C
Ta Kwu Ling                  12.0 C               21.8 C
Lau Fau Shan                 15.2 C               23.8 C
Tai Po                       14.5 C               19.9 C
Sha Tin                      14.3 C               21.0 C
Tuen Mun                     15.8 C               20.6 C
Tseung Kwan O                14.6 C               19.1 C
Sai Kung                     15.4 C               19.4 C
Cheung Chau                  15.7 C               20.4 C
Chek Lap Kok                 16.7 C               22.4 C
Tsing Yi                     15.2 C               21.1 C
Shek Kong                    14.1 C               22.1 C
Tsuen Wan Ho Koon            13.1 C               21.5 C
Tsuen Wan Shing Mun Valley   13.5 C               20.8 C
Hong Kong Park               15.3 C               20.8 C
Shau Kei Wan                 15.1 C               18.6 C
Kowloon City                 15.1 C               22.5 C
Happy Valley                 15.6 C               20.2 C
Wong Tai Sin                 14.9 C               21.4 C
Stanley                      15.9 C               18.7 C
Kwun Tong                    15.4 C               19.3 C
Sham Shui Po                 15.6 C               22.1 C
Kai Tak Runway Park          16.4 C               19.3 C
Yuen Long Park               14.9 C               22.9 C
Tai Mei Tuk               15.0 C               22.0 C

Duration of sunshine (King's Park):              3.6 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.
Sea surface temperature (Waglan Island):        17.7 C 

Yesterday's (02 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                         0.10
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 during
the period 1987-2016, the background ambient gamma radiation
levels may vary between 0.06 and 0.30 microsievert per hour.

    2. The extent of health effects to a person as a result of
exposure to radiation is expressed by a physical quantity
called equivalent dose, in unit of sievert.  Protective
action may be required if there is an increase in the
ambient gamma dose rate above background such that the total
additional dose is expected to exceed 5000 microsieverts in
a relatively short period of time. For example, a dose of
5000 microsieverts may be reached when the ambient gamma
dose rate is 1000 microsieverts per hour (several thousand
times above background) and lasts for 5 hours.

    3. The readings of ambient gamma radiation level from
instrument are expressed in unit of gray, which is
numerically equal to the gamma dose expressed in sievert.
    Climatological Information for 02 Jan
     2003copy right image | Important notices | Privacy policy Last revision date: <03 Jan 2018> 

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