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Bulletin issued at 13:02 HKT 30/Mar/2017

At 1 p.m. at the Hong Kong Observatory the air temperature was 23 degrees Celsius and the relative humidity 81 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 24 degrees;
Wong Chuk Hang 24 degrees;
Ta Kwu Ling 25 degrees;
Lau Fau Shan 27 degrees;
Tai Po 22 degrees;
Sha Tin 23 degrees;
Tuen Mun 25 degrees;
Tseung Kwan O 21 degrees;
Sai Kung 22 degrees;
Cheung Chau 23 degrees;
Chek Lap Kok 26 degrees;
Tsing Yi 24 degrees;
Shek Kong 25 degrees;
Tsuen Wan Ho Koon 24 degrees;
Tsuen Wan Shing Mun Valley 24 degrees;
Hong Kong Park 23 degrees;
Shau Kei Wan 21 degrees;
Kowloon City 24 degrees;
Happy Valley 24 degrees;
Wong Tai Sin 24 degrees;
Stanley 22 degrees;
Kwun Tong 22 degrees;
Sham Shui Po 25 degrees;
Kai Tak Runway Park 22 degrees;
Yuen Long Park 27 degrees;
Tai Mei Tuk 23 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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UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 12:45 HKT 30/Mar/2017

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

A humid easterly airstream is affecting the coast of Guangdong. Besides, a trough of low pressure is bringing unsettled weather to central China.

Weather forecast for this afternoon and tonight

Cloudy. Sunny intervals in the afternoon. Coastal fog and one or two rain patches overnight. Moderate east to southeasterly winds, occasionally fresh offshore at first.

Outlook : Squally thunderstorms later tomorrow and becoming cool appreciably. Becoming fine and dry during 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
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 30/Mar/2017

N0 WARNING.

GENERAL SITUATION AT 292100 UTC:
A HUMID EASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 300100 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 25-21 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= E TO NE 4-5, S 4-5 LATER. DOWN TO 2000 M IN MIST OR RAIN PATCHES. SEA UP TO 2 M. SWELL NE UP TO 2 M. =
BASHI= E TO SE 5-6, OCNL 7 AT FIRST. RAIN PATCHES. SEA 2-3 M, UP TO 4 M AT FIRST. SWELL E 2 M. =
PRATAS= E TO SE 4-5, OCNL 6 AT FIRST. CLD. SEA 2 M, UP TO 3 M AT FIRST. SWELL E 2 M. =
BALINTANG= E TO SE 5-6, OCNL 7 AT FIRST. FINE. SEA 2-3 M, UP TO 4 M AT FIRST. SWELL E 2 M. =
SCARBOROUGH= E 4-5. FINE. SEA UP TO 2 M. SWELL E UP TO 2 M. =
PARACEL= E TO SE 4-5. DOWN TO 500 M IN FOG OR RAIN PATCHES IN N. SEA UP TO 2 M. SWELL E UP TO 2 M. =
TONKIN= SE 4-5, N 6 IN N LATER. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA 2 M, 3 M LATER. =
DANANG= 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 12:30 HKT 30/Mar/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 30 March 2017

    Warnings:
    Strong winds in all areas. 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, occasionally force 6 at first. North force 6 tomorrow.
    A few rain patches. Fog patches. Isolated squally showers and thunderstorms tomorrow.
    Moderate to rough seas.

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

    Shangchuan Dao:
    Southeast force 4 to 5, becoming north force 6 later.
    Fog patches. Isolated squally showers and thunderstorms tomorrow.
    Moderate seas, becoming rough later.

    Outlook for the next 48 hours
    Northerly winds of force 6 to 7. Isolated squally showers and thunderstorms. Fog patches at first.

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

    Waglan Island Wind east-northeast force 4
      Visibility 4600 Metres

    Shantou Wind east-northeast force 1
      Visibility 9 Kilometres

    Dongsha Wind east-southeast force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind east-northeast force 5

    Macau Wind east-southeast force 2
      Visibility 4300 Metres in mist

    Xisha Wind east-southeast force 2
      Visibility 21 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 30/MAR/2017
    (Next update at 17:30 HKT 30/MAR/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND 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 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  110/10-15
       OFFSHORE:  090/15-20
                  OCNL 090/25                          24-27
   B.   2000 FT:  140/15-20
                  OCNL 090/25                          18
   C.   5000 FT:  190/15                               15
   D.  10000 FT:  250/25                               8
   E.  18000 FT:  270/35                               MS9
   F.  24000 FT:  260/50                               MS20
   G.  30000 FT:  240/75                               MS33
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      CLOUDY. LOCALIZED MIST. ONE OR TWO RAIN PATCHES
      IN THE MORNING.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1200 FT SCT 2500 FT
   K. VISIBILITY    : 7 KM.  TEMPO 3500 M IN MIST/RAIN.
   L. 0 DEG. C LEVEL: 14000 FT      10 DEG. C LEVEL(S) : 9800 FT
   M. TURBULENCE    : MOD TO SEV NEAR HILLS AND OFFSHORE.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 20 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EAST TO SOUTHEASTERLY WINDS. SUNNY
     INTERVALS IN THE AFTERNOON. 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 17:25 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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