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Bulletin issued at 13:02 HKT 05/Apr/2017

At 1 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 8. The intensity of UV radiation was very high.

The air temperatures at other places were:

King's Park 26 degrees;
Wong Chuk Hang 25 degrees;
Ta Kwu Ling 26 degrees;
Lau Fau Shan 26 degrees;
Tai Po 24 degrees;
Sha Tin 25 degrees;
Tuen Mun 26 degrees;
Tseung Kwan O 26 degrees;
Sai Kung 24 degrees;
Cheung Chau 26 degrees;
Chek Lap Kok 25 degrees;
Tsing Yi 27 degrees;
Shek Kong 27 degrees;
Tsuen Wan Ho Koon 25 degrees;
Tsuen Wan Shing Mun Valley 25 degrees;
Hong Kong Park 25 degrees;
Shau Kei Wan 23 degrees;
Kowloon City 27 degrees;
Happy Valley 25 degrees;
Wong Tai Sin 25 degrees;
Stanley 24 degrees;
Kwun Tong 25 degrees;
Sham Shui Po 27 degrees;
Kai Tak Runway Park 24 degrees;
Yuen Long Park 26 degrees;
Tai Mei Tuk 25 degrees.


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


Climatological Information for 5 Apr

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 12:45 HKT 05/Apr/2017

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

A warm maritime airstream is affecting the coast of Guangdong.

Weather forecast for this afternoon and tonight

Warm with sunny periods in the afternoon. Mainly cloudy with coastal mist tonight. Moderate easterly winds.

Outlook : Warm, humid with fog in the next few days.


(The above forecast period is valid up to 23:59 HKT today, 05/04/2017; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

Information on Tropical Cyclones

Marine Weather Information and Forecast

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MARINE FORECAST
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 05/Apr/2017

N0 WARNING.

GENERAL SITUATION AT 042100 UTC:
AN EASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 050100 UTC:

HONG KONG= E TO SE 4-5. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA UP TO 2 M. SWELL E UP TO 2 M. TEMP 20-26 C. =
KWANGTUNG= E TO SE 4-5, OCNL 6 IN E. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA UP TO 3 M. SWELL E 2 M. =
TAIWAN STRAIT= E TO SE 4-5. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA UP TO 2 M. =
BASHI= E 5-6. FINE. SEA 2-3 M. SWELL E TO NE 2-3 M. =
PRATAS= E TO SE 4-5, OCNL 6. FINE. SEA UP TO 3 M. SWELL E TO NE 2 M. =
BALINTANG= E 5-6. FINE. SEA 2-3 M. SWELL E TO NE 2-3 M. =
SCARBOROUGH= E TO NE 4-5, OCNL 6. FINE. SEA UP TO 3 M. SWELL E TO NE 2-3 M. =
PARACEL= E TO SE 4-5. RAIN PATCHES. SEA UP TO 2 M. SWELL E TO NE 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. 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 05/Apr/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 05 April 2017

    Warnings:
    Strong winds in Nan'ao and Shanwei. 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 to southeast force 4 to 5.
    Fog patches. A few rain patches later.
    Moderate seas.

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

    South of Hong Kong and Shangchuan Dao:
    East to southeast force 4 to 5.
    Fog patches.
    Moderate seas.

    Outlook for the next 48 hours
    South to southeasterly winds of force 4 to 5. Fog patches.

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

    Waglan Island Wind east-northeast force 4
      Visibility 9 Kilometres

    Shantou Wind south force 2
      Visibility 25 Kilometres

    Dongsha Wind east force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind east-northeast force 4

    Macau Wind northeast force 1
      Visibility 9 Kilometres

    Xisha Wind east-northeast force 2
      Visibility 22 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 05/APR/2017
    (Next update at 17:30 HKT 05/APR/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON IS AFFECTING THE COASTAL
     AREAS OF GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  080/10
       OFFSHORE:  080/15, OCNL 20                      23-27
   B.   2000 FT:  140/15, OCNL 20                      18
   C.   5000 FT:  170/10                               13
   D.  10000 FT:  250/20                               10
   E.  18000 FT:  250/30                               MS5
   F.  24000 FT:  240/40                               MS16
   G.  30000 FT:  240/55                               MS29
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      SUNNY PERIODS.  LOCALIZED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT  SCT 4500 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 4000 M IN MIST.
   L. 0 DEG. C LEVEL: 15500 FT
      10 DEG. C LEVEL(S) : 6000, 10000 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.5-2.0 M     SEA TEMPERATURE    : 20 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EAST TO SOUTHEASTERLY WINDS.  MAINLY
     CLOUDY.  LOCALIZED FOG/MIST AND A FEW RAIN
     PATCHES.=

    ===================================================================
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 09:55 HKT on 01 Apr 17

    VHHK SIGMET 1 VALID 010200/010600 VHHH- VHHK HONG KONG FIR EMBD TS FCST S OF N1730 TOP FL380 MOV ESE 10KT WKN= VHHK SIGMET 7 VALID 312200/010200 VHHH- VHHK HONG KONG FIR EMBD TS FCST SE OF LINE N1742 E11306 - N1830 E11524 TOP FL380 MOV ESE 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 05/Apr/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     26.0 C
Minimum Air Temperature                     19.3 C
Grass Minimum Temperature                   18.4 C
Relative Humidity                        62 - 85 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January            75.9 mm
Against an average of                      180.7 mm

Other Stations                Min                  Max
King's Park                  18.3 C               25.3 C
Wong Chuk Hang               18.9 C               25.1 C
Ta Kwu Ling                  17.7 C               25.3 C
Lau Fau Shan                 16.7 C               27.4 C
Tai Po                       18.8 C               23.9 C
Sha Tin                      17.9 C               25.0 C
Tuen Mun                     18.1 C               26.5 C
Tseung Kwan O                17.3 C               24.6 C
Sai Kung                     17.8 C               23.3 C
Cheung Chau                  18.7 C               24.7 C
Chek Lap Kok                 19.6 C               26.6 C
Tsing Yi                     19.3 C               26.7 C
Shek Kong                    18.9 C               26.6 C
Tsuen Wan Ho Koon            17.6 C               24.8 C
Tsuen Wan Shing Mun Valley   19.1 C               25.0 C
Hong Kong Park               18.5 C               24.9 C
Shau Kei Wan                 18.0 C               23.9 C
Kowloon City                 18.1 C               26.1 C
Happy Valley                 19.1 C               25.7 C
Wong Tai Sin                 18.7 C               25.5 C
Stanley                      18.6 C               24.4 C
Kwun Tong                    18.3 C               24.2 C
Sham Shui Po                 19.0 C               26.7 C
Kai Tak Runway Park          18.9 C               23.5 C
Yuen Long Park               17.0 C               27.0 C
Tai Mei Tuk               17.8 C               24.8 C

Duration of sunshine (King's Park):              9.9 H
The mean UV index recorded at King's Park yesterday was 4,
the UV intensity was Moderate.
The maximum UV index for yesterday was 8.
Sea surface temperature (Waglan Island):        20.9 C 

Yesterday's (04 Apr 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                             0.08
Kat O                               0.10
Yuen Ng Fan                         0.11
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 04 Apr
     2003copy right image | Important notices | Privacy policy Last revision date: <05 Apr 2017> 

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