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Bulletin issued at 12:02 HKT 19/May/2017

At noon at the Hong Kong Observatory the air temperature was 26 degrees Celsius and the relative humidity 73 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 26 degrees;
Wong Chuk Hang 25 degrees;
Ta Kwu Ling 26 degrees;
Lau Fau Shan 26 degrees;
Tai Po 25 degrees;
Sha Tin 26 degrees;
Tuen Mun 26 degrees;
Tseung Kwan O 25 degrees;
Sai Kung 25 degrees;
Cheung Chau 25 degrees;
Chek Lap Kok 27 degrees;
Tsing Yi 27 degrees;
Shek Kong 26 degrees;
Tsuen Wan Ho Koon 25 degrees;
Tsuen Wan Shing Mun Valley 26 degrees;
Hong Kong Park 25 degrees;
Shau Kei Wan 24 degrees;
Kowloon City 26 degrees;
Happy Valley 26 degrees;
Wong Tai Sin 26 degrees;
Stanley 25 degrees;
Kwun Tong 25 degrees;
Sham Shui Po 27 degrees;
Kai Tak Runway Park 25 degrees;
Yuen Long Park 27 degrees;
Tai Mei Tuk 25 degrees.

A trace of rainfall was recorded at the Hong Kong Observatory between midnight last night and midday today.


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


Climatological Information for 19 May

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Local Weather Forecast

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Bulletin updated at 11:45 HKT 19/May/2017

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

A fresh easterly airstream continues to affect the coast of Guangdong. Meanwhile, a band of clouds is bringing showers to the region.

Weather forecast for this afternoon and tonight

Mainly cloudy with one or two showers. Moderate to fresh easterly winds.

Outlook : There will be showers during the weekend. Sunny intervals next Monday and Tuesday.


(The above forecast period is valid up to 23:59 HKT today, 19/05/2017; 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 19/May/2017

N0 WARNING.

GENERAL SITUATION AT 182100 UTC:
TROUGH 17N 112E 20N 120E 21N 125E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 190100 UTC:

HONG KONG= E 5-6, OCNL 7. ISOL SHOWERS AND TS. SEA UP TO 4 M. TEMP 27-24 C. =
KWANGTUNG= E TO NE 5-6, OCNL 7. ISOL SHOWERS AND TS. SEA UP TO 4 M. SWELL E UP TO 2 M. =
TAIWAN STRAIT= NE 5-6, OCNL 7. ISOL SHOWERS. SEA UP TO 4 M. SWELL NE UP TO 2 M. =
BASHI= E TO NE 5-6, OCNL 7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL E TO NE 2 M. =
PRATAS= E 5-6, OCNL 7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL E TO NE 2 M. =
BALINTANG= E TO SE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL E TO NE 2 M. =
SCARBOROUGH= SE 4-5, BEC SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL NE UP TO 2 M. =
PARACEL= E TO SE 4-5, UP TO 6 IN N. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL NE UP TO 2 M. =
TONKIN= E TO SE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. =
DANANG= E TO SE 4-5, UP TO 6 IN N. ISOL SHOWERS AND TS. SEA UP TO 3 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 19/May/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 19 May 2017

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    An easterly airstream continues to affect the coastal waters of Guangdong.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 5 to 6, occasionally force 7.
    Isolated showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    East to northeast force 5 to 6, occasionally force 7.
    Isolated showers and thunderstorms.
    Moderate to rough seas.

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

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

    Waglan Island Wind northeast force 5
      Visibility 9 Kilometres

    Shantou Wind east-northeast force 2
      Visibility 30 Kilometres

    Dongsha Wind east force 4
      Visibility 9 Kilometres in rain

    Huangmaozhou Wind northeast force 4

    Macau Wind north-northeast force 3
      Visibility 13 Kilometres

    Xisha Wind east force 1
      Visibility 30 Kilometres

  • Explanation of Seas or Sea Waves
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  • Visibility Readings in Hong Kong Waters
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 09:00 HKT 19/MAY/2017
    (Next update at 17:30 HKT 19/MAY/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM CONTINUES TO AFFECT 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:  090/10-15
       OFFSHORE:  090/15-20  OCNL 25                   25-28
   B.   2000 FT:  100/15-20 OCNL 25                    19
   C.   5000 FT:  120/10                               17
   D.  10000 FT:  250/15                               9
   E.  18000 FT:  270/25                               MS4
   F.  24000 FT:  270/35                               MS14
   G.  30000 FT:  270/45                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      CLOUDY WITH ISOLATED SHOWERS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 3500 FT
   K. VISIBILITY    : 9 KM.  TEMPO 3000 M IN SHOWERS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 9800 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND  NEAR HILLS
   N. SEA STATE     : 2.0-3.5 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EASTERLY WINDS. CLOUDY WITH A
     FEW SHOWERS.=

    ===================================================================
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 16:55 HKT on 18 May 17

    VHHK SIGMET 2 VALID 180855/181255 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1948 E11630 - N1748 E11454 - N1748 E11400 - N1854 E11400 - N1948 E11500 - N1948 E11630 TOP FL400 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 19/May/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     27.4 C
Minimum Air Temperature                     24.3 C
Grass Minimum Temperature                   24.7 C
Relative Humidity                        62 - 83 Percent
Rainfall                                     0.1 mm 
Total rainfall since 1st January           245.1 mm
Against an average of                      488.0 mm

Other Stations                Min                  Max
King's Park                  23.7 C               27.5 C
Wong Chuk Hang               23.8 C               27.3 C
Ta Kwu Ling                  22.8 C               28.1 C
Lau Fau Shan                 22.8 C               29.1 C
Tai Po                       23.4 C               26.2 C
Sha Tin                      24.0 C               28.1 C
Tuen Mun                     23.2 C               29.4 C
Tseung Kwan O                23.5 C               27.3 C
Sai Kung                     24.3 C               26.9 C
Cheung Chau                  23.5 C               26.3 C
Chek Lap Kok                 25.0 C               29.7 C
Tsing Yi                     24.0 C               28.7 C
Shek Kong                    23.2 C               28.4 C
Tsuen Wan Ho Koon            21.9 C               27.9 C
Tsuen Wan Shing Mun Valley   23.2 C               27.6 C
Hong Kong Park               23.9 C               27.8 C
Shau Kei Wan                 23.6 C               26.7 C
Kowloon City                 23.4 C               27.9 C
Happy Valley                 24.4 C               28.2 C
Wong Tai Sin                 23.7 C               27.5 C
Stanley                      24.2 C               27.2 C
Kwun Tong                    23.9 C               27.0 C
Sham Shui Po                 24.3 C               28.6 C
Kai Tak Runway Park          24.6 C               26.8 C
Yuen Long Park               23.6 C               28.9 C
Tai Mei Tuk               22.4 C               27.2 C

Duration of sunshine (King's Park):              1.4 H
The mean UV index recorded at King's Park yesterday was 3,
the UV intensity was Moderate.
The maximum UV index for yesterday was 8.
Sea surface temperature (Waglan Island):        25.8 C 

Yesterday's (18 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 18 May
     2003copy right image | Important notices | Privacy policy Last revision date: <19 May 2017> 

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