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Bulletin issued at 04:02 HKT 13/Mar/2017

At 4 a.m. at the Hong Kong Observatory the air temperature was 20 degrees Celsius and the relative humidity 96 per cent.

The air temperatures at other places were:

King's Park 20 degrees;
Wong Chuk Hang 19 degrees;
Ta Kwu Ling 20 degrees;
Lau Fau Shan 21 degrees;
Tai Po 19 degrees;
Sha Tin 19 degrees;
Tuen Mun 21 degrees;
Tseung Kwan O 19 degrees;
Sai Kung 19 degrees;
Cheung Chau 20 degrees;
Chek Lap Kok 21 degrees;
Tsing Yi 20 degrees;
Shek Kong 19 degrees;
Tsuen Wan Ho Koon 20 degrees;
Tsuen Wan Shing Mun Valley 20 degrees;
Hong Kong Park 19 degrees;
Shau Kei Wan 19 degrees;
Kowloon City 19 degrees;
Happy Valley 19 degrees;
Wong Tai Sin 19 degrees;
Stanley 19 degrees;
Kwun Tong 20 degrees;
Sham Shui Po 20 degrees;
Kai Tak Runway Park 19 degrees;
Yuen Long Park 20 degrees;
Tai Mei Tuk 19 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 03:45 HKT 13/Mar/2017

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

A humid maritime airstream is affecting the coastal areas of Guangdong.

Weather forecast for today

Mainly cloudy. Humid and foggy with one or two light rain patches in the morning and at night. Mild with sunny periods during the day. Temperatures will range between 19 and 24 degrees. Light to moderate southeasterly winds.

Outlook : Cool with a few rain patches in the following 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
Traditional Chinese Simplified Chinese

Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 12/Mar/2017

N0 WARNING.

GENERAL SITUATION AT 120900 UTC:
A SOUTHEASTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 121300 UTC:

HONG KONG= E 3-4, BEC SE 2-3. DOWN TO 500 M IN FOG OR LIGHT RAIN PATCHES. TEMP 19-24 C. =
KWANGTUNG= E TO SE 4-5, BEC S TO SE 3-4 LATER. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA UP TO 2 M. SWELL NE 2 M IN E. =
TAIWAN STRAIT= S TO SE 4, OCNL 5. DOWN TO 2000 M IN MIST OR RAIN PATCHES. SEA UP TO 2 M. SWELL NE 2 M. =
BASHI= E TO SE 4-5. FINE. SEA UP TO 2 M. SWELL E 2 M. =
PRATAS= E 4-5, BEC S TO SE 4-5. CLD. SEA UP TO 2 M. SWELL E 2 M. =
BALINTANG= E 4-5, BEC S TO SE 4-5. FINE. SEA UP TO 2 M. SWELL E 2 M. =
SCARBOROUGH= E TO NE 4-5, BEC S TO SE 4-5. FINE. SEA UP TO 2 M. SWELL E TO NE 2 M. =
PARACEL= S TO SE 4-5. DOWN TO 500 M IN FOG OR RAIN PATCHES IN N. SEA UP TO 2 M. SWELL E 2 M. =
TONKIN= SE 4-5, OCNL 6. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA UP TO 3 M. =
DANANG= S TO SE 4-5, OCNL 6. DOWN TO 500 M IN FOG OR RAIN PATCHES IN N. SEA UP TO 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
  • 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 03:30 HKT 13/Mar/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 13 March 2017

    Warnings:
    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 to 4.
    Fog patches and one or two light rain patches.
    Slight to moderate seas.

    Nan'ao and Shanwei:
    East to southeast force 4 to 5, becoming south to southeast force 3 to 4.
    Fog patches.
    Slight to moderate seas.

    South of Hong Kong and Shangchuan Dao:
    South to southeast force 3 to 4.
    Fog patches.
    Slight to moderate seas.

    Outlook for the next 48 hours
    South to southeasterly winds of force 4 to 5, becoming northeasterly winds of force 6 to 7. Fog patches at first.

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

    Waglan Island Wind north-northeast force 2
      Visibility 1100 Metres

    Shantou Wind calm
      Visibility 8 Kilometres

    Dongsha Wind east-northeast force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 4

    Macau Wind south-southeast force 2
      Visibility 700 Metres in fog

    Xisha Wind east-southeast force 1
      Visibility 19 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 01:30 HKT 13/MAR/2017
    (Next update at 9:00-9:30 HKT 13/MAR/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     FOG.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE EASTERLY AIRSTREAM NOW AFFECTING THE COASTAL
     AREAS OF GUANGDONG WILL BE REPLACED BY A
     MARITIME AIRSTREAM GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  110/10
       OFFSHORE:  090/15-20                            22-18
   B.   2000 FT:  180/15-20                            18
   C.   5000 FT:  210/20                               17
   D.  10000 FT:  260/20                               9
   E.  18000 FT:  270/35                               MS5
   F.  24000 FT:  270/40                               MS16
   G.  30000 FT:  250/45                               MS32
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      1200 - 3300 FT.
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW RAIN PATCHES.
      LOCALIZED MIST AND FOG PATCHES.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT  SCT 2000 FT  BKN 4000 FT
   K. VISIBILITY    : 7 KM. TEMPO 2000 M IN RAIN/MIST. TEMPO 800M IN FOG
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD OFFSHORE AND  NEAR HILLS
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 18 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHEASTERLY WINDS. MILD WITH SUNNY
     PERIODS DURING THE DAY.=

    ===================================================================
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 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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