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Bulletin issued at 10:02 HKT 16/May/2017

At 10 a.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 85 per cent.
During the past hour the mean UV Index recorded at King's Park was 3. The intensity of UV radiation was moderate.

The air temperatures at other places were:

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


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


Climatological Information for 16 May

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Local Weather Forecast

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 09:45 HKT 16/May/2017

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

The rain area associated with a trough of low pressure has moved to the northern part of the South China Sea. Meanwhile, the cloud band covering western Guangdong is thinning out gradually.

Weather forecast for today

Sunny periods apart from one or two isolated showers at first. Moderate northerly winds, fresh at times at first.

Outlook : Sunny periods in the next couple of days.


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

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Weather Information for Aviation

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MARINE FORECAST
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 16/May/2017

N0 WARNING.

GENERAL SITUATION AT 152100 UTC:
TROUGH 19N 108E 21N 112E 23N 117E S 8 KT.

MARINE FORECAST FOR 24 HOURS FROM 160100 UTC:

HONG KONG= NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. TEMP 28-24 C. =
KWANGTUNG= NE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. =
TAIWAN STRAIT= NE 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL NE 2 M. =
BASHI= SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
PRATAS= SE 4-5, BEC SW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
BALINTANG= SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
SCARBOROUGH= SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= SW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS IN N. SEA UP TO 2 M. =
TONKIN= NE 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= SW 4-5. 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 09:30 HKT 16/May/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 16 May 2017

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

    Weather Situation:
    A trough of low pressure is bringing showers and thunderstorms to the northern part of the South China Sea.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Northeast force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    North to northeast force 5, occasionally force 6.
    Scattered heavy squally showers and thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 5 to 6. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind north force 4
      Visibility 40 Kilometres

    Shantou Wind north-northeast force 1
      Visibility 5000 Metres in showers

    Dongsha Wind south-southwest force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind north force 4

    Macau Wind north force 3
      Visibility 10 Kilometres

    Xisha Wind south-southwest force 2
      Visibility 30 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 09:00 HKT 16/MAY/2017
    (Next update at 17:30 HKT 16/MAY/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE RAIN AREA ASSOCIATED WITH A TROUGH OF LOW
     PRESSURE HAS MOVED TO THE NORTHERN PART OF THE
     SOUTH CHINA SEA. MEANWHILE, THE CLOUD BAND
     COVERING WESTERN GUANGDONG IS THINNING OUT
     GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  020/10
                  BEC 090/5-10
       OFFSHORE:  020/10-15
                  BEC 030/10-15                        23-28
   B.   2000 FT:  030/15-20                            20
   C.   5000 FT:  030/15                               16
   D.  10000 FT:  280/20                               11
   E.  18000 FT:  270/35                               MS5
   F.  24000 FT:  260/45                               MS15
   G.  30000 FT:  250/55                               MS29
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS AT FIRST.
      SUNNY PERIODS IN THE AFTERNOON.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT  SCT 2000 FT  BKN 8000 FT
   K. VISIBILITY    : 8 KM. TEMPO 4000 M IN SHOWERS.
   L. 0 DEG. C LEVEL: 16000 FT      10 DEG. C LEVEL(S) : 10800 FT
   M. TURBULENCE    : MOD NEAR HILLS.
   N. SEA STATE     : 1.0-2.5 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EAST TO NORTHEASTERLY WINDS.  MAINLY
     CLOUDY.=

    ===================================================================
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 07:00 HKT on 16 May 17

    VHHK SIGMET 6 VALID 151905/152305 VHHH- VHHK HONG KONG FIR EMBD TS FCST N OF N1845 AND E OF E11200 TOP FL420 MOV E 10KT NC= VHHK SIGMET 7 VALID 152305/160305 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1830 E11530 - N1830 E11224 - N1930 E11130 - N2236 E11430 - N2336 E11730 - N2100 E11730 TOP FL420 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 16/May/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     27.0 C
Minimum Air Temperature                     24.6 C
Grass Minimum Temperature                   25.1 C
Relative Humidity                        85 - 97 Percent
Rainfall                                    38.5 mm 
Total rainfall since 1st January           242.0 mm
Against an average of                      468.9 mm

Other Stations                Min                  Max
King's Park                  23.8 C               26.4 C
Wong Chuk Hang               23.9 C               26.2 C
Ta Kwu Ling                  23.7 C               26.1 C
Lau Fau Shan                 23.9 C               26.2 C
Tai Po                       23.3 C               26.4 C
Sha Tin                      23.7 C               26.9 C
Tuen Mun                     24.8 C               26.7 C
Tseung Kwan O                24.0 C               26.4 C
Sai Kung                     24.2 C               26.5 C
Cheung Chau                  23.9 C               26.0 C
Chek Lap Kok                 24.9 C               28.1 C
Tsing Yi                     24.1 C               27.0 C
Shek Kong                    23.7 C               26.4 C
Tsuen Wan Ho Koon            23.4 C               25.4 C
Tsuen Wan Shing Mun Valley   23.6 C               26.1 C
Hong Kong Park               24.0 C               27.0 C
Shau Kei Wan                 23.6 C               26.4 C
Kowloon City                 23.5 C               26.2 C
Happy Valley                 24.7 C               27.5 C
Wong Tai Sin                 24.0 C               26.7 C
Stanley                      24.2 C               26.9 C
Kwun Tong                    24.4 C               26.8 C
Sham Shui Po                 24.0 C               27.1 C
Kai Tak Runway Park          24.3 C               26.9 C
Yuen Long Park               24.2 C               26.4 C
Tai Mei Tuk               23.0 C               26.0 C

Duration of sunshine (King's Park):              0.1 H
The mean UV index recorded at King's Park yesterday was 1,
the UV intensity was Low.
The maximum UV index for yesterday was 3.
 

Yesterday's (15 May 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                               0.09
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 15 May
     2003copy right image | Important notices | Privacy policy Last revision date: <16 May 2017> 

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