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Bulletin issued at 11:02 HKT 20/Jan/2017

At 11 a.m. at the Hong Kong Observatory the air temperature was 18 degrees Celsius and the relative humidity 61 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 18 degrees;
Wong Chuk Hang 20 degrees;
Ta Kwu Ling 17 degrees;
Lau Fau Shan 17 degrees;
Tai Po 18 degrees;
Sha Tin 18 degrees;
Tuen Mun 17 degrees;
Tseung Kwan O 19 degrees;
Sai Kung 17 degrees;
Cheung Chau 17 degrees;
Chek Lap Kok 18 degrees;
Tsing Yi 18 degrees;
Shek Kong 17 degrees;
Tsuen Wan Ho Koon 17 degrees;
Tsuen Wan Shing Mun Valley 21 degrees;
Hong Kong Park 19 degrees;
Shau Kei Wan 21 degrees;
Kowloon City 19 degrees;
Happy Valley 20 degrees;
Wong Tai Sin 19 degrees;
Stanley 19 degrees;
Kwun Tong 19 degrees;
Sham Shui Po 20 degrees;
Kai Tak Runway Park 20 degrees;
Yuen Long Park 19 degrees;
Tai Mei Tuk 19 degrees.


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


Climatological Information for 20 Jan

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 10:45 HKT 20/Jan/2017

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

The northeast monsoon is bringing cool weather to the coast of Guangdong. Locally, temperatures over the territory this morning were generally around three degrees lower than those of yesterday.

Weather forecast for today

Mainly fine and dry. Cool in the morning and at night. Moderate to fresh northerly winds.

Outlook : Mainly fine and dry in the next couple of days with relatively large temperature difference between day and night. Temperatures will fall to around 12 degrees on Sunday morning.


(The above forecast period is valid up to 23:59 HKT today, 20/01/2017; 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 20/Jan/2017

GALE WARNING AREAS: TAIWAN STRAIT, BASHI AND BALINTANG.

GENERAL SITUATION AT 192100 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 200100 UTC:

HONG KONG= N TO NE 5-6. CLD. SEA 2-3 M. TEMP 20-14 C. =
KWANGTUNG= N TO NE 6-7. RAIN PATCHES. SEA 3-4 M. SWELL NE 2 M. =
TAIWAN STRAIT= NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 2 M. =
BASHI= NE 6-7, UP TO 8 LATER. RAIN PATCHES LATER. SEA 3-4 M, UP TO 6 M LATER. SWELL NE 2 M. =
PRATAS= NE 6-7. RAIN PATCHES LATER. SEA 3-4 M. SWELL NE 2 M. =
BALINTANG= NE 6-7, UP TO 8 LATER. RAIN PATCHES LATER. SEA 3-4 M, UP TO 6 M LATER. SWELL NE 2 M. =
SCARBOROUGH= NE 5-6, UP TO 7 LATER. CLD. SEA 2-3 M, UP TO 4 M LATER. SWELL NE 2 M. =
PARACEL= NE 5-6, UP TO 7 LATER. RAIN PATCHES LATER. SEA 2-3 M, UP TO 4 M LATER. SWELL NE 2 M. =
TONKIN= N TO NE 6-7. RAIN PATCHES. SEA 3-4 M. =
DANANG= NE 5-6, UP TO 7 LATER. RAIN PATCHES. SEA 2-3 M, UP TO 4 M LATER. SWELL NE 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 09:30 HKT 20/Jan/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 20 January 2017

    Warnings:
    Gale force winds in Nan'ao. Strong winds in Hong Kong adjacent waters, Shanwei, 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.
    Moderate to rough seas.

    Nan'ao:
    North to northeast force 6 to 7, occasionally force 8.
    Rough to very rough seas.

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

    Outlook for the next 48 hours
    Northeasterly winds of force 6 to 7.

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

    Waglan Island Wind north force 5
      Visibility 47 Kilometres

    Shantou Wind northeast force 1
      Visibility 30 Kilometres

    Dongsha Wind north-northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind north force 4

    Macau Wind north force 4
      Visibility 27 Kilometres

    Xisha Wind northeast force 3
      Visibility 17 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 20/JAN/2017
    (Next update at 17:30 HKT 20/JAN/2017)
    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 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  360/10-15
       OFFSHORE:  360/15-20, OCNL 25                   15-21
   B.   2000 FT:  360/15-20, OCNL 25                   11
   C.   5000 FT:  330/10                               10
   D.  10000 FT:  270/25                               9
   E.  18000 FT:  260/35                               MS7
   F.  24000 FT:  260/35                               MS17
   G.  30000 FT:  260/55                               MS32
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2000-3600 FT
   I. WEATHER       : 
      MAINLY FINE AND DRY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 3000 FT
   K. VISIBILITY    : 9 KM.
   L. 0 DEG. C LEVEL: 15500,16000 FT10 DEG. C LEVEL(S) : 5800 FT
   M. TURBULENCE    : MOD TO SEV
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 19 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTH TO NORTHEASTERLY WINDS.
     REMAINING FINE AND DRY.=

    ===================================================================
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 20/Jan/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     24.1 C
Minimum Air Temperature                     18.7 C
Grass Minimum Temperature                   18.0 C
Relative Humidity                        72 - 92 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January             3.4 mm
Against an average of                       14.1 mm

Other Stations                Min                  Max
King's Park                  17.9 C               25.1 C
Wong Chuk Hang               18.1 C               23.5 C
Ta Kwu Ling                  17.7 C               23.9 C
Lau Fau Shan                 17.5 C               21.9 C
Tai Po                       18.0 C               23.0 C
Sha Tin                      18.2 C               23.8 C
Tuen Mun                     18.1 C               23.1 C
Tseung Kwan O                17.6 C               24.9 C
Sai Kung                     18.1 C               22.1 C
Cheung Chau                  17.6 C               23.1 C
Chek Lap Kok                 18.5 C               22.5 C
Tsing Yi                     18.2 C               23.6 C
Shek Kong                    17.8 C               23.3 C
Tsuen Wan Ho Koon            17.2 C               23.4 C
Tsuen Wan Shing Mun Valley   17.5 C               24.4 C
Hong Kong Park               18.3 C               25.4 C
Shau Kei Wan                 17.6 C               23.8 C
Kowloon City                 17.9 C               26.2 C
Happy Valley                 18.8 C               25.2 C
Wong Tai Sin                 18.7 C               27.8 C
Stanley                      18.1 C               23.2 C
Kwun Tong                    18.0 C               24.9 C
Sham Shui Po                 18.5 C               26.1 C
Kai Tak Runway Park          18.7 C               23.7 C
Yuen Long Park               17.8 C               23.6 C
Tai Mei Tuk               18.0 C               23.9 C

Duration of sunshine (King's Park):              6.9 H
The mean UV index recorded at King's Park yesterday was 3,
the UV intensity was Moderate.
The maximum UV index for yesterday was 7.
Sea surface temperature (Waglan Island):        19.9 C 

Yesterday's (19 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                          0.10
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 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 19 Jan
     2003copy right image | Important notices | Privacy policy Last revision date: <20 Jan 2017> 

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