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Bulletin issued at 10:02 HKT 13/Mar/2017

At 10 a.m. at the Hong Kong Observatory the air temperature was 21 degrees Celsius and the relative humidity 93 per cent.
During the past hour the mean UV Index recorded at King's Park was 2. The intensity of UV radiation was low.

The air temperatures at other places were:

King's Park 23 degrees;
Wong Chuk Hang 23 degrees;
Ta Kwu Ling 23 degrees;
Lau Fau Shan 25 degrees;
Tai Po 20 degrees;
Sha Tin 21 degrees;
Tuen Mun 23 degrees;
Tseung Kwan O 20 degrees;
Sai Kung 19 degrees;
Cheung Chau 22 degrees;
Chek Lap Kok 25 degrees;
Tsing Yi 24 degrees;
Shek Kong 25 degrees;
Tsuen Wan Ho Koon 22 degrees;
Tsuen Wan Shing Mun Valley 24 degrees;
Hong Kong Park 21 degrees;
Shau Kei Wan 20 degrees;
Kowloon City 23 degrees;
Happy Valley 24 degrees;
Wong Tai Sin 23 degrees;
Stanley 20 degrees;
Kwun Tong 23 degrees;
Sham Shui Po 25 degrees;
Kai Tak Runway Park 21 degrees;
Yuen Long Park 25 degrees;
Tai Mei Tuk 21 degrees.


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


Climatological Information for 13 Mar

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 09:45 HKT 13/Mar/2017

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

A humid maritime airstream is bringing foggy weather to the coastal areas of Guangdong. Locally, visibility in the harbour fell below 1000 metres this morning, and visibility at Waglan Island even fell to around 100 metres.

Weather forecast for today

Mainly cloudy. Humid and foggy in the morning and at night. Warm with sunny periods during the day. Light to moderate southeasterly winds.

Outlook : Cool with a few rain patches in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 13/03/2017; 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 13/Mar/2017

GALE WARNING AREA: TAIWAN STRAIT.

GENERAL SITUATION AT 122100 UTC:
TROUGH 26N 105E 26N 110E 27N 119E S SLOWLY.

MARINE FORECAST FOR 24 HOURS FROM 130100 UTC:

HONG KONG= SE 3, N TO NE 4-5 LATER. DOWN TO 100 M IN FOG PATCHES IN THE MORNING AND AT NIGHT. SEA UP TO 2 M LATER. TEMP 24-19 C. =
KWANGTUNG= S TO SE 3-4, N TO NE 5 LATER. DOWN TO 500 M IN FOG PATCHES IN THE MORNING AND AT NIGHT. SEA 2 M LATER. =
TAIWAN STRAIT= S TO SE 4, BEC NE 7-8. DOWN TO 2000 M IN MIST OR RAIN PATCHES AT FIRST. SEA 4-6 M. =
BASHI= E TO SE 4, N TO NE 6-7 LATER. FINE. SEA 3-4 M LATER. =
PRATAS= SE 4, NE 5 LATER. FINE. SEA 2 M LATER. =
BALINTANG= E TO SE 4, N TO NE 5 LATER. FINE. SEA 2 M. =
SCARBOROUGH= E 4. FINE. =
PARACEL= S TO SE 4. DOWN TO 500 M IN FOG OR RAIN PATCHES IN N. =
TONKIN= SE 4-5, N TO NE 6-7 LATER. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA UP TO 2 M, 3-4 M LATER. =
DANANG= S TO SE 4-5. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA UP TO 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 13/Mar/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 13 March 2017

    Warnings:
    Strong winds in Nan'ao. Fog in all areas.

    Weather Situation:
    A southeasterly airstream is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Southeast force 3, becoming north to northeast force 4 to 5 later.
    Fog patches in the morning and at night.
    Slight seas, becoming moderate later.

    Nan'ao:
    South to southeast force 3 to 4, becoming northeast force 5 to 6 later.
    Fog patches in the morning and at night.
    Slight to moderate seas, becoming rough later.

    Shanwei, South of Hong Kong and Shangchuan Dao:
    South to southeast force 3 to 4, becoming north to northeast force 5 later.
    Fog patches in the morning and at night.
    Slight to moderate seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 6 to 7, up to force 8 in east.

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

    Waglan Island Wind north-northeast force 2
      Visibility 60 Metres

    Shantou Wind south-southeast force 1
      Visibility 5000 Metres in mist

    Dongsha Wind east force 1
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 3

    Macau Wind south-southeast force 2
      Visibility 100 Metres in fog

    Xisha Wind southeast force 1
      Visibility 14 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 13/MAR/2017
    (Next update at 17:30 HKT 13/MAR/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     FOG.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A SOUTHEASTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL WATERS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  140/5-10
       OFFSHORE:  110/10-15                            20-25
   B.   2000 FT:  190/15-20                            20
   C.   5000 FT:  240/25                               19
   D.  10000 FT:  270/20                               9
   E.  18000 FT:  260/35                               MS4
   F.  24000 FT:  260/40                               MS16
   G.  30000 FT:  250/50                               MS32
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      3600 - 5000 FT.
   I. WEATHER       : 
      MAINLY CLOUDY. SUNNY PERIODS DURING THE DAY.
      LOCALIZED MIST AND FOG.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 800 FT  SCT 2000 FT  BKN 5000 FT
   K. VISIBILITY    : 7 KM. TEMPO 3000 M IN MIST. TEMPO 500 M IN FOG.
   L. 0 DEG. C LEVEL: 16000 FT      10 DEG. C LEVEL(S) : 10200 FT
   M. TURBULENCE    : MOD
   N. SEA STATE     : 1.0-2.0 M     SEA TEMPERATURE    : 18 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE SOUTHEASTERLY WINDS. MAINLY
     CLOUDY. LOCALIZED MIST AND FOG.=

    ===================================================================
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
    Traditional Chinese Simplified Chinese

    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 05:12 HKT on 22 Feb 17

    VHHK SIGMET 6 VALID 211715/212115 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2345 E11730 - N2100 E11730 - N2100 E11330 - N2200 E11300 - N2245 E11500 - N2345 E11730 TOP FL400 MOV NE 10KT NC= VHHK SIGMET 7 VALID 212115/220115 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2345 E11730 - N2230 E11730 - N2130 E11430 - N2245 E11430 - N2345 E11730 TOP FL400 MOV NE 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 13/Mar/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     19.5 C
Minimum Air Temperature                     17.0 C
Grass Minimum Temperature                   17.2 C
Relative Humidity                        83 - 96 Percent
Rainfall                                     1.0 mm 
Total rainfall since 1st January            31.5 mm
Against an average of                      101.4 mm

Other Stations                Min                  Max
King's Park                  16.5 C               19.6 C
Wong Chuk Hang               17.4 C               21.2 C
Ta Kwu Ling                  17.0 C               21.5 C
Lau Fau Shan                 17.9 C               22.3 C
Tai Po                       17.0 C               20.3 C
Sha Tin                      17.3 C               20.4 C
Tuen Mun                     18.6 C               20.8 C
Tseung Kwan O                16.2 C               18.5 C
Sai Kung                     16.8 C               19.2 C
Cheung Chau                  17.1 C               19.7 C
Chek Lap Kok                 18.1 C               22.7 C
Tsing Yi                     18.2 C               21.7 C
Shek Kong                    18.4 C               23.8 C
Tsuen Wan Ho Koon            17.4 C               21.2 C
Tsuen Wan Shing Mun Valley   18.0 C               21.7 C
Hong Kong Park               17.1 C               19.7 C
Shau Kei Wan                 16.1 C               18.8 C
Kowloon City                 16.8 C               20.0 C
Happy Valley                 17.3 C               20.7 C
Wong Tai Sin                 17.1 C               21.1 C
Stanley                      16.3 C               19.5 C
Kwun Tong                    16.7 C               20.0 C
Sham Shui Po                 17.7 C               22.0 C
Kai Tak Runway Park          17.1 C               19.8 C
Yuen Long Park               18.7 C               22.5 C
Tai Mei Tuk               16.7 C               19.7 C

Duration of sunshine (King's Park):              0 H
The mean UV index recorded at King's Park yesterday was 1,
the UV intensity was Low.
The maximum UV index for yesterday was 3.
Sea surface temperature (Waglan Island):        17.6 C 

Yesterday's (12 Mar 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 12 Mar
     2003copy right image | Important notices | Privacy policy Last revision date: <13 Mar 2017> 

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