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Bulletin issued at 16:02 HKT 20/Mar/2017

At 4 p.m. at the Hong Kong Observatory the air temperature was 27 degrees Celsius and the relative humidity 67 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 27 degrees;
Wong Chuk Hang 25 degrees;
Ta Kwu Ling 26 degrees;
Lau Fau Shan 25 degrees;
Tai Po 24 degrees;
Sha Tin 26 degrees;
Tuen Mun 27 degrees;
Tseung Kwan O 24 degrees;
Sai Kung 22 degrees;
Cheung Chau 21 degrees;
Chek Lap Kok 26 degrees;
Tsing Yi 26 degrees;
Shek Kong 28 degrees;
Tsuen Wan Ho Koon 26 degrees;
Tsuen Wan Shing Mun Valley 27 degrees;
Hong Kong Park 25 degrees;
Shau Kei Wan 22 degrees;
Kowloon City 25 degrees;
Happy Valley 29 degrees;
Wong Tai Sin 26 degrees;
Stanley 24 degrees;
Kwun Tong 26 degrees;
Sham Shui Po 27 degrees;
Kai Tak Runway Park 22 degrees;
Yuen Long Park 29 degrees;
Tai Mei Tuk 25 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

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UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 16:15 HKT 20/Mar/2017

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

An easterly airstream is affecting the coast of Guangdong. Locally, it was sunny during the day today. It was warm in the afternoon. Temperatures over the territory rose to 27 degrees or above.

Weather forecast for tonight and tomorrow

Becoming cloudy. Visibility relatively low in some areas. Warm with sunny periods tomorrow. Temperatures will range between 21 and 27 degrees. Light winds, becoming fresh easterlies with one or two rain patches tomorrow night.

Outlook : Cooler and windier with a few rain patches in the following couple of days.


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

N0 WARNING.

GENERAL SITUATION AT 192100 UTC:
AN EASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 200100 UTC:

HONG KONG= E 3-4, 5 AT FIRST. DOWN TO 500 M IN FOG PATCHES. SEA UP TO 2 M. TEMP 23-20 C. =
KWANGTUNG= E 3-4, 5 AT FIRST. DOWN TO 500 M IN FOG PATCHES. SEA UP TO 2 M. =
TAIWAN STRAIT= NE 4-5, 6 LATER. 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 AT FIRST. FINE. SEA UP TO 3 M. =
PRATAS= E TO NE 4-5. FINE. SEA UP TO 2 M. =
BALINTANG= E TO SE 5, OCNL 6 AT FIRST. FINE. SEA UP TO 3 M. =
SCARBOROUGH= E TO NE 4-5. FINE. SEA UP TO 2 M. =
PARACEL= E TO SE 4-5. FINE. SEA UP TO 2 M. =
TONKIN= E TO SE 4-5. DOWN TO 1000 M IN MIST PATCHES. SEA UP TO 2 M. =
DANANG= E TO SE 4-5. DOWN TO 1000 M IN MIST 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 16:30 HKT 20/Mar/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 4:30 p.m. on 20 March 2017

    Warnings:
    Fog in all areas.

    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 3 to 4.
    Fog patches.
    Slight to moderate seas.

    Nan'ao:
    East force 4 to 5.
    Fog patches tonight and tomorrow morning.
    Moderate seas.

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

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

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

    Waglan Island Wind east force 3
      Visibility 10 Kilometres

    Shantou Wind south-southeast force 2
      Visibility 11 Kilometres

    Dongsha Wind north-northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind east-northeast force 3

    Macau Wind southeast force 2
      Visibility 8 Kilometres

    Xisha Wind east-northeast force 2
      Visibility 23 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
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    Weather Forecast for Local Aviation

    Bulletin issued at 09:30 HKT 20/MAR/2017
    (Next update at 17:30 HKT 20/MAR/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
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 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  080/10-15                            20-26
   B.   2000 FT:  180/10                               18
   C.   5000 FT:  230/10                               14
   D.  10000 FT:  260/20                               7
   E.  18000 FT:  250/30                               MS8
   F.  24000 FT:  260/50                               MS18
   G.  30000 FT:  260/60                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      1200-2000 FT.
   I. WEATHER       : 
      MAINLY CLOUDY. SUNNY INTERVALS DURING THE DAY.
      LOCALIZED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3000 FT  BKN 8000 FT
   K. VISIBILITY    : 7 KM. TEMPO 3000 M IN MIST.
   L. 0 DEG. C LEVEL: 14500 FT      10 DEG. C LEVEL(S) : 9000 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 17 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS. MAINLY CLOUDY.
     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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