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Bulletin issued at 00:02 HKT 20/Mar/2017

At midnight at the Hong Kong Observatory the air temperature was 19 degrees Celsius and the relative humidity 96 per cent.

The air temperatures at other places were:

King's Park 19 degrees;
Wong Chuk Hang 19 degrees;
Ta Kwu Ling 19 degrees;
Lau Fau Shan 19 degrees;
Tai Po 19 degrees;
Sha Tin 19 degrees;
Tuen Mun 20 degrees;
Tseung Kwan O 18 degrees;
Sai Kung 18 degrees;
Cheung Chau 19 degrees;
Chek Lap Kok 20 degrees;
Tsing Yi 20 degrees;
Shek Kong 20 degrees;
Tsuen Wan Ho Koon 19 degrees;
Tsuen Wan Shing Mun Valley 20 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 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 20 Mar

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

Current Weather | Regional Temperature Forecast in HK |  9-day Weather Forecast
UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 00:00 HKT 20/Mar/2017

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

A humid easterly airstream affected the coastal areas of Guangdong yesterday. Meanwhile, an upper air disturbance brought rain and thunderstorms to the region. Locally, it was cloudy to overcast with rain. There was mist in the morning and at night. More than 10 millimetres of rainfall were generally recorded over the territory and rainfall even exceeded 20 millimetres over the New Territories. The easterly airstream is expected to bring mild and foggy weather to the coast of Guangdong today and tomorrow.

Weather forecast for Hong Kong (Monday, 20 Mar 2017)

Cloudy. Misty in the morning and at night. There will be one or two rain patches at first and sunny intervals during the day. Temperatures will range between 19 and 23 degrees. Moderate easterly winds, occasionally fresh at first.

Outlook : Sunny periods and coastal fog on Tuesday. Slightly cooler in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 20/03/2017; 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 21:00 HKT 19/Mar/2017

N0 WARNING.

GENERAL SITUATION AT 190900 UTC:
AN EASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 191300 UTC:

HONG KONG= E 4-5, OCNL 6. DOWN TO 1000 M IN MIST OR RAIN PATCHES. ISOL SHOWERS AND TS AT FIRST. SEA UP TO 3 M. SWELL E UP TO 2 M. TEMP 19-23 C. =
KWANGTUNG= E 4-5, OCNL 6 IN E. ISOL SHOWERS AND TS. DOWN TO 2000 M IN MIST PATCHES. SEA UP TO 3 M. SWELL E UP TO 2 M. =
TAIWAN STRAIT= NE 4-5, OCNL 6. DOWN TO 2000 M IN MIST OR RAIN PATCHES. SEA UP TO 3 M. SWELL NE 2 M. =
BASHI= E TO SE 5, OCNL 6. FINE. SEA UP TO 3 M. SWELL E 2 M. =
PRATAS= E 5, OCNL 6. ISOL SHOWERS AND TS IN N. SEA UP TO 3 M. SWELL E UP TO 2 M. =
BALINTANG= E TO SE 5, OCNL 6. FINE. SEA UP TO 3 M. SWELL E 2 M. =
SCARBOROUGH= E TO NE 4-5. FINE. SEA UP TO 2 M. =
PARACEL= E TO SE 4-5. ISOL SHOWERS AND TS IN N. SEA UP TO 2 M. =
TONKIN= E TO SE 4-5. DOWN TO 1000 M IN MIST PATCHES. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= E TO SE 4-5. DOWN TO 1000 M IN MIST PATCHES. ISOL SHOWERS AND TS. 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 23:30 HKT 19/Mar/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 19 March 2017

    Warnings:
    Strong winds in Hong Kong adjacent waters, Nan'ao, Shanwei and south of Hong Kong.

    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.
    Fog patches. One or two rain patches at first.
    Moderate to rough seas.

    Nan'ao and Shanwei:
    East force 5, occasionally force 6.
    Moderate to rough seas.

    South of Hong Kong:
    East force 4 to 5, occasionally force 6.
    Moderate to rough seas.

    Shangchuan Dao:
    East to southeast force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

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

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

    Waglan Island Wind northeast force 5
      Visibility 2500 Metres

    Shantou Wind east-northeast force 2
      Visibility 8 Kilometres in rain

    Dongsha Wind northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind east-northeast force 5

    Macau Wind east force 2
      Visibility 700 Metres in fog

    Xisha Wind east-northeast force 1
      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 17:30 HKT 19/MAR/2017
    (Next update at 01:30 HKT 20/MAR/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS. 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 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  080/10-15
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  080/15-20, OCNL 25                   22-19
   B.   2000 FT:  120/15-20, OCNL 25                   18
   C.   5000 FT:  180/15                               15
   D.  10000 FT:  240/20                               7
   E.  18000 FT:  250/40                               MS7
   F.  24000 FT:  250/60                               MS19
   G.  30000 FT:  250/80                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      1900-2400 FT, 4400-5000 FT
   I. WEATHER       : 
      MAINLY CLOUDY WITH OCCASIONAL RAIN. THERE WILL
      BE A FEW ISOLATED THUNDERSTORMS. LOCALIZED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT  SCT 2000 FT TEMPO FEW CB 800 FT
      SCT 1500 FT BKN 4000 FT
   K. VISIBILITY    : 7 KM. TEMPO 2500 M IN RAIN/MIST. TEMPO 1500 M IN TS.
   L. 0 DEG. C LEVEL: 14000 FT      10 DEG. C LEVEL(S) : 8400 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS, OFFSHORE AND  NEAR HILLS.
   N. SEA STATE     : 2.0-3.0 M     SEA TEMPERATURE    : 18 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EASTERLY WINDS. MAINLY CLOUDY
     WITH OCCASIONAL RAIN AND A FEW ISOLATED
     THUNDERSTORMS AT FIRST. LOCALIZED 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 17:30 HKT on 19 Mar 17

    VHHK SIGMET 3 VALID 190930/191330 VHHH- VHHK HONG KONG FIR SEV ICE FCST WI N2218 E11312 - N2230 E11342 - N2306 E11536 - N2018 E11536 - N2018 E11318 - N2206 E11318 - N2218 E11312 FL140/240 MOV ENE 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/Mar/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     20.6 C
Minimum Air Temperature                     18.9 C
Grass Minimum Temperature                   19.0 C
Relative Humidity                        90 - 99 Percent
Rainfall                                    10.7 mm 
Total rainfall since 1st January            51.0 mm
Against an average of                      118.1 mm

Other Stations                Min                  Max
King's Park                  18.6 C               20.3 C
Wong Chuk Hang               19.4 C               21.5 C
Ta Kwu Ling                  19.1 C               21.1 C
Lau Fau Shan                 19.1 C               21.7 C
Tai Po                       18.5 C               20.6 C
Sha Tin                      19.2 C               21.1 C
Tuen Mun                     19.9 C               21.5 C
Tseung Kwan O                17.9 C               19.7 C
Sai Kung                     18.3 C               20.3 C
Cheung Chau                  18.8 C               20.3 C
Chek Lap Kok                 20.1 C               24.8 C
Tsing Yi                     20.1 C               21.6 C
Shek Kong                    19.9 C               23.2 C
Tsuen Wan Ho Koon            19.0 C               20.9 C
Tsuen Wan Shing Mun Valley   19.4 C               21.8 C
Hong Kong Park               18.8 C               20.9 C
Shau Kei Wan                 17.6 C               20.2 C
Kowloon City                 18.7 C               20.6 C
Happy Valley                 18.9 C               21.8 C
Wong Tai Sin                 18.8 C               21.3 C
Stanley                      17.9 C               20.4 C
Kwun Tong                    18.4 C               21.1 C
Sham Shui Po                 19.7 C               21.4 C
Kai Tak Runway Park          18.8 C               21.1 C
Yuen Long Park               19.8 C               22.4 C
Tai Mei Tuk               18.3 C               20.3 C

Duration of sunshine (King's Park):              0 H
The mean UV index recorded at King's Park yesterday was 0.9,
the UV intensity was Low.
The maximum UV index for yesterday was 2.
Sea surface temperature (Waglan Island):        18.7 C 

Yesterday's (19 Mar 2017) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 to
0.14 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                        0.14

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 Mar
     2003copy right image | Important notices | Privacy policy Last revision date: <20 Mar 2017> 

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