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Bulletin issued at 01:02 HKT 30/Mar/2017

At 1 a.m. at the Hong Kong Observatory the air temperature was 22 degrees Celsius and the relative humidity 89 per cent.

The air temperatures at other places were:

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


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


Climatological Information for 30 Mar

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 00:45 HKT 30/Mar/2017

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

A humid easterly airstream affected the coast of Guangdong yesterday. Locally, it was mainly cloudy. The weather was misty with one or two rain patches in the morning and at night. There were sunny intervals during the day. The easterly airstream will bring foggy weather to the coast of Guangdong today and tomorrow. A cold front is expected to reach the south China coast tomorrow. There will be squally thunderstorms and the weather will become cool appreciably over the region.

Weather forecast for Hong Kong

Mainly cloudy. Coastal mist and one or two rain patches in the morning and at night. Sunny intervals during the day. Temperatures will range between 21 and 24 degrees. Moderate east to southeasterly winds, occasionally fresh offshore at first.

Outlook : Coastal fog at first on Friday. Squally thunderstorms later during the day and it will become cool appreciably. Becoming fine and dry over the weekend.


(The above forecast period is valid up to 23:59 HKT today, 30/03/2017; 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 29/Mar/2017

N0 WARNING.

GENERAL SITUATION AT 290900 UTC:
A HUMID EASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 291300 UTC:

HONG KONG= E TO SE 4-5, UP TO 6 AT FIRST. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA 2 M, UP TO 3 M AT FIRST. SWELL E UP TO 2 M. TEMP 20-24 C. =
KWANGTUNG= E TO SE 4-5, UP TO 6 AT FIRST. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA 2 M, UP TO 3 M AT FIRST. SWELL E 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 5-6. RAIN PATCHES. SEA 2-3 M. SWELL E 2 M. =
PRATAS= E TO SE 4-5, UP TO 6 AT FIRST. CLD. SEA 2 M, UP TO 3 M AT FIRST. SWELL E 2 M. =
BALINTANG= E 5-6, OCNL 7. FINE. SEA UP TO 4 M. SWELL E 2 M. =
SCARBOROUGH= E TO NE 4-5. FINE. SEA UP TO 2 M. SWELL E 2 M. =
PARACEL= E TO SE 4-5. DOWN TO 500 M IN FOG OR RAIN PATCHES IN N. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E UP TO 2 M. =
TONKIN= SE 4-5. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA UP TO 2 M. =
DANANG= SE 4-5. DOWN TO 500 M IN FOG OR RAIN 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
    Text Only Traditional Chinese Simplified Chinese

    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 29/Mar/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 29 March 2017

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

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to southeast force 4 to 5, up to force 6 at first.
    A few rain patches. Fog patches.
    Moderate seas, rough at first.

    Nan'ao and Shanwei:
    East to southeast force 4 to 5, up to force 6 at first.
    Fog patches.
    Moderate seas, rough at first.

    South of Hong Kong:
    East to southeast force 4 to 5, up to force 6 at first.
    Fog patches.
    Moderate seas, rough seas at first.

    Shangchuan Dao:
    East to southeast force 4 to 5.
    Fog patches.
    Moderate seas.

    Outlook for the next 48 hours
    Southeasterly winds of force 4 to 5, becoming northerly winds of force 6. Fog patches, isolated showers and squally thunderstorms.

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

    Waglan Island Wind east-northeast force 4
      Visibility 3300 Metres

    Shantou Wind south force 1
      Visibility 13 Kilometres

    Dongsha Wind east force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind east-northeast force 6

    Macau Wind east-southeast force 2
      Visibility 4100 Metres in mist

    Xisha Wind east-northeast force 1
      Visibility 6 Kilometres in showers

  • 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 30/MAR/2017
    (Next update at 9:00-9:30 HKT 30/MAR/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A HUMID EASTERLY AIRSTREAM IS AFFECTING THE
     COAST OF GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/10-15
       OFFSHORE:  090/15-20                            23-26
   B.   2000 FT:  140/20-25                            18
   C.   5000 FT:  180/10                               14
   D.  10000 FT:  250/20                               7
   E.  18000 FT:  260/40                               MS9
   F.  24000 FT:  260/50                               MS20
   G.  30000 FT:  240/70                               MS33
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH ONE OR TWO RAIN PATCHES.
      SUNNY INTERVALS DURING THE DAY. LOCALIZED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 3500 FT
   K. VISIBILITY    : 8 KM.  TEMPO 4000 M IN MIST/RAIN.
   L. 0 DEG. C LEVEL: 14000 FT      10 DEG. C LEVEL(S) : 7000, 8200, 8600 FT
   M. TURBULENCE    : MOD TO SEV NEAR HILLS. MOD OFFSHORE.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 19 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EAST TO SOUTHEASTERLY WINDS. SUNNY
     INTERVALS DURING THE DAY. MAINLY CLOUDY WITH ONE
     OR TWO RAIN PATCHES AT NIGHT. 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
    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 17:25 HKT on 25 Mar 17

    VHHK SIGMET 1 VALID 250925/251325 VHHH- VHHK HONG KONG FIR SEV ICE FCST N OF LINE N2100 E11730 - N1954 E11130 FL200/250 MOV E 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 30/Mar/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     23.7 C
Minimum Air Temperature                     20.4 C
Grass Minimum Temperature                   19.6 C
Relative Humidity                        74 - 90 Percent
Rainfall                                     0.3 mm 
Total rainfall since 1st January            53.8 mm
Against an average of                      154.8 mm

Other Stations                Min                  Max
King's Park                  19.8 C               24.0 C
Wong Chuk Hang               20.3 C               24.6 C
Ta Kwu Ling                  19.7 C               25.7 C
Lau Fau Shan                 19.1 C               29.2 C
Tai Po                       19.9 C               23.0 C
Sha Tin                      19.9 C               23.2 C
Tuen Mun                     20.1 C               25.5 C
Tseung Kwan O                19.4 C               22.9 C
Sai Kung                     19.8 C               22.4 C
Cheung Chau                  19.5 C               24.2 C
Chek Lap Kok                 21.0 C               27.4 C
Tsing Yi                     20.6 C               25.6 C
Shek Kong                    19.9 C               25.9 C
Tsuen Wan Ho Koon            19.6 C               25.5 C
Tsuen Wan Shing Mun Valley   20.7 C               25.2 C
Hong Kong Park               20.0 C               24.0 C
Shau Kei Wan                 19.2 C               21.7 C
Kowloon City                 19.9 C               25.4 C
Happy Valley                 20.4 C               24.9 C
Wong Tai Sin                 20.3 C               25.1 C
Kwun Tong                    19.7 C               23.7 C
Sham Shui Po                 20.5 C               25.4 C
Kai Tak Runway Park          20.3 C               23.1 C
Yuen Long Park               19.3 C               27.4 C
Tai Mei Tuk               19.7 C               22.5 C

Duration of sunshine (King's Park):              0.7 H
The mean UV index recorded at King's Park yesterday was 2,
the UV intensity was Low.
The maximum UV index for yesterday was 6.
Sea surface temperature (Waglan Island):        19.2 C 

Yesterday's (29 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 29 Mar
     2003copy right image | Important notices | Privacy policy Last revision date: <30 Mar 2017> 

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