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Bulletin issued at 12:02 HKT 30/Jan/2017

At noon at the Hong Kong Observatory the air temperature was 23 degrees Celsius and the relative humidity 80 per cent.
During the past hour the mean UV Index recorded at King's Park was 4. The intensity of UV radiation was moderate.

The air temperatures at other places were:

King's Park 23 degrees;
Wong Chuk Hang 24 degrees;
Ta Kwu Ling 22 degrees;
Lau Fau Shan 21 degrees;
Tai Po 22 degrees;
Sha Tin 23 degrees;
Tuen Mun 22 degrees;
Tseung Kwan O 24 degrees;
Sai Kung 23 degrees;
Cheung Chau 22 degrees;
Chek Lap Kok 21 degrees;
Tsing Yi 23 degrees;
Shek Kong 23 degrees;
Tsuen Wan Ho Koon 21 degrees;
Tsuen Wan Shing Mun Valley 22 degrees;
Hong Kong Park 24 degrees;
Shau Kei Wan 23 degrees;
Kowloon City 23 degrees;
Happy Valley 24 degrees;
Wong Tai Sin 23 degrees;
Stanley 23 degrees;
Kwun Tong 24 degrees;
Sham Shui Po 24 degrees;
Kai Tak Runway Park 24 degrees;
Yuen Long Park 22 degrees;
Tai Mei Tuk 23 degrees.

A trace of 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 30 Jan

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 11:45 HKT 30/Jan/2017

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

A humid easterly airstream persists over the coastal areas of Guangdong. Locally, visibility in Chek Lap Kok lingered around 3000 metres this morning. Meanwhile, pressure is rising over inland Guangdong. A surge of the northeast monsoon is expected to reach the coastal areas tonight.

Weather forecast for this afternoon and tonight

Mainly cloudy with one or two rain patches. Visibility will be rather low in some areas. Moderate northeasterly winds, strengthening tonight. It will become cool.

Outlook : It will be cool in the morning in the next few days.


(The above forecast period is valid up to 23:59 HKT today, 30/01/2017; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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MARINE FORECAST
Traditional Chinese Simplified Chinese

Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 30/Jan/2017

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

GENERAL SITUATION AT 290900 UTC:
THE NORTHEAST MONSOON IS EXPECTED TO AFFECT THE FORECAST AREAS LATER.

MARINE FORECAST FOR 24 HOURS FROM 300100 UTC:

HONG KONG= NE 4-5, UP TO 6 LATER. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA 2-3 M. TEMP 23-16 C. =
KWANGTUNG= NE 5-6, BEC 7, OCNL 8 IN E LATER. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA 2-3 M, UP TO 5 M IN E LATER. SWELL NE 2 M. =
TAIWAN STRAIT= NE 6-7, BEC 8. RAIN PATCHES. SEA 3-4 M, BEC 6 M. SWELL NE 3 M. =
BASHI= NE 5-6, 7-8 LATER. CLD. SEA 2-3 M, 4-6 M LATER. SWELL NE 2 M. =
PRATAS= NE 5-6, 7-8 LATER. CLD. SEA 2-3 M, 4-6 M LATER. SWELL NE 2 M. =
BALINTANG= NE 5-6, 7-8 LATER. CLD. SEA 2-3 M, 4-6 M LATER. SWELL NE 2 M. =
SCARBOROUGH= NE 5-6, 7 LATER. CLD. SEA 2-3 M, 4 M LATER. =
PARACEL= NE 4-5, BEC 6. CLD. SEA 2-3 M. =
TONKIN= NE 4-5, 6 LATER. CLD. SEA 2-3 M. =
DANANG= NE 4-5, OCNL 6 LATER. CLD. SEA 2 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
    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 12:30 HKT 30/Jan/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 30 January 2017

    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:
    Pressure is rising over inland Guangdong. A surge of the northeast monsoon is expected to reach the south China coastal waters tonight.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Northeast force 4 to 5, becoming force 6 later.
    A few rain patches. Visibility rather low in some areas.
    Moderate seas, becoming rough later.

    Nan'ao and Shanwei:
    Northeast force 5 to 6, becoming force 7, occasionally force 8.
    Moderate to rough seas, becoming rough to very rough.

    South of Hong Kong and Shangchuan Dao:
    Northeast force 4 to 5, becoming force 6 to 7 later.
    Moderate seas, becoming rough later.

    Outlook for the next 48 hours
    Northeasterly winds of force 6 to 7, occasionally force 8 in east.

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

    Waglan Island Wind northeast force 3
      Visibility 12 Kilometres

    Shantou Wind east-northeast force 1
      Visibility 8 Kilometres

    Dongsha Wind east-northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind north force 3

    Macau Wind north force 2
      Visibility 2400 Metres in mist

    Xisha Wind north-northeast force 3
      Visibility 29 Kilometres

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
  • Descriptive Terms of Wind Speeds
  • Visibility Readings in Hong Kong Waters
  • Map showing forecast areas
  • Tidal Information

    • WEATHER FORECAST FOR LOCAL AVIATION
    Traditional Chinese Simplified Chinese

    Weather Forecast for Local Aviation

    Bulletin issued at 09:30 HKT 30/JAN/2017
    (Next update at 17:30 HKT 30/JAN/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EAST TO NORTHEASTERLY AIRSTREAM IS AFFECTING
     THE SOUTH CHINA COASTAL AREAS. A SURGE OF THE
     NORTHEAST MONSOON IS EXPECTED TO REACH THE
     COASTAL AREAS TONIGHT.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  040/05-10
       OFFSHORE:  040/10-15, OCNL 20 LATER             20-23
   B.   2000 FT:  060/10-15, OCNL 20 LATER             17
   C.   5000 FT:  100/10                               12
   D.  10000 FT:  210/15                               8
   E.  18000 FT:  230/30                               MS7
   F.  24000 FT:  220/50                               MS18
   G.  30000 FT:  230/65                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW RAIN PATCHES. SUNNY
      INTERVALS DURING THE DAY. LOCALISED MIST AT
      FIRST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT SCT 2000 FT BKN 6000 FT.
   K. VISIBILITY    : 7 KM. TEMPO 3000 M IN RAIN/MIST.
   L. 0 DEG. C LEVEL: 16000 FT      10 DEG. C LEVEL(S) : 6000, 11000, 11500 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 18 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTHEASTERLY WINDS,
     OCCASIONALLY STRONG OFFSHORE.  CLOUDY WITH A FEW
     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.

    The latest significant weather information
    issued by the Hong Kong Observatory at 21:17 HKT on 12 Jan 17

    VHHK SIGMET 1 VALID 120920/121320 VHHH- VHHK HONG KONG FIR EMBD TS FCST S OF LINE N1742 E11306 - N1724 E11436 TOP FL400 MOV NW 10KT NC= VHHK SIGMET 2 VALID 121320/121720 VHHH- VHHK HONG KONG FIR EMBD TS FCST S OF LINE N1742 E11306 - N1724 E11436 TOP FL400 MOV NW 10KT NC=

    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 30/Jan/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     21.5 C
Minimum Air Temperature                     18.1 C
Grass Minimum Temperature                   16.9 C
Relative Humidity                        77 - 96 Percent
Rainfall                                     2.4 mm 
Total rainfall since 1st January             6.1 mm
Against an average of                       23.5 mm

Other Stations                Min                  Max
King's Park                  17.7 C               22.3 C
Wong Chuk Hang               18.2 C               23.1 C
Ta Kwu Ling                  17.4 C               23.6 C
Lau Fau Shan                 16.6 C               24.3 C
Tai Po                       17.9 C               21.6 C
Sha Tin                      18.2 C               22.4 C
Tuen Mun                     17.3 C               22.7 C
Tseung Kwan O                17.6 C               21.0 C
Sai Kung                     18.0 C               20.8 C
Cheung Chau                  18.2 C               21.4 C
Chek Lap Kok                 19.2 C               22.3 C
Tsing Yi                     18.9 C               23.2 C
Shek Kong                    18.7 C               24.1 C
Tsuen Wan Ho Koon            17.5 C               23.1 C
Tsuen Wan Shing Mun Valley   17.8 C               23.0 C
Hong Kong Park               18.0 C               23.1 C
Shau Kei Wan                 17.4 C               20.8 C
Kowloon City                 17.9 C               23.8 C
Happy Valley                 18.3 C               23.4 C
Wong Tai Sin                 18.3 C               23.7 C
Stanley                      17.5 C               21.0 C
Kwun Tong                    17.7 C               22.4 C
Sham Shui Po                 18.6 C               24.2 C
Kai Tak Runway Park          18.3 C               21.3 C
Yuen Long Park               16.0 C               24.6 C
Tai Mei Tuk               17.3 C               22.8 C

Duration of sunshine (King's Park):              0.6 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 6.
Sea surface temperature (Waglan Island):        18.5 C 

Yesterday's (29 Jan 2017) 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                         0.14
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 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 29 Jan
     2003copy right image | Important notices | Privacy policy Last revision date: <30 Jan 2017> 

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