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Bulletin issued at 12:02 HKT 14/Jul/2017

At noon at the Hong Kong Observatory the air temperature was 31 degrees Celsius and the relative humidity 74 per cent.
During the past hour the mean UV Index recorded at King's Park was 9. The intensity of UV radiation was very high.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 12:45 p.m. today. One or two isolated thunderstorms are expected to occur over Hong Kong.
The Very Hot Weather Warning is now in force. Very hot weather might cause adverse health effects. Members of the public should take care to avoid heatstroke.

The air temperatures at other places were:

King's Park 31 degrees;
Wong Chuk Hang 31 degrees;
Ta Kwu Ling 32 degrees;
Lau Fau Shan 32 degrees;
Tai Po 28 degrees;
Sha Tin 29 degrees;
Tuen Mun 31 degrees;
Tseung Kwan O 29 degrees;
Sai Kung 30 degrees;
Cheung Chau 30 degrees;
Chek Lap Kok 33 degrees;
Tsing Yi 32 degrees;
Shek Kong 31 degrees;
Tsuen Wan Ho Koon 29 degrees;
Tsuen Wan Shing Mun Valley 30 degrees;
Hong Kong Park 31 degrees;
Shau Kei Wan 30 degrees;
Kowloon City 29 degrees;
Happy Valley 31 degrees;
Wong Tai Sin 28 degrees;
Stanley 31 degrees;
Kwun Tong 29 degrees;
Sham Shui Po 32 degrees;
Kai Tak Runway Park 30 degrees;
Yuen Long Park 33 degrees;
Tai Mei Tuk 29 degrees.

Between 10:45 and 11:45 a.m., the rainfall recorded in various regions were:

Sai Kung 0 to 7 mm;
Kwun Tong 0 to 5 mm;
Wong Tai Sin 0 to 3 mm;
Sha Tin 0 to 3 mm;
Tuen Mun 0 to 2 mm;
Tai Po 0 to 1 mm;
Central & Western District 0 to 1 mm;
Southern District 0 to 1 mm.

1.4 millimetres of rainfall were 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 14 Jul

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 11:45 HKT 14/Jul/2017

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

The subtropical ridge covering southeastern China is bringing very hot weather to the region. Locally, temperatures over parts of the New Territories rose to about 33 degrees around noon. Meanwhile, an area of low pressure is bringing unsettled weather to the central part of the South China Sea.

Weather forecast for this afternoon and tonight

Sunny periods in the afternoon, and there will be isolated showers and thunderstorms. Mainly cloudy tonight. Moderate east to southeasterly winds.

Outlook : A few showers tomorrow. More showers with a few thunderstorms on Sunday and Monday.


(The above forecast period is valid up to 23:59 HKT today, 14/07/2017; 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 14/Jul/2017

N0 WARNING.

GENERAL SITUATION AT 132100 UTC:
AN EASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 140100 UTC:

HONG KONG= E TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. TEMP 33-28 C. =
KWANGTUNG= E TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
TAIWAN STRAIT= S TO SE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
BASHI= E TO SE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. SWELL SE UP TO 2 M. =
PRATAS= E TO SE 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. =
BALINTANG= E TO SE 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL SE UP TO 2 M. =
SCARBOROUGH= S TO SE 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW UP TO 2 M. =
PARACEL= E TO NE 4-5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL SW UP TO 2 M. =
TONKIN= E TO NE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= NW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL S 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.


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    • 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 14/Jul/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 14 July 2017

    Weather Situation:
    An easterly airstream is affecting the south China coastal waters. Meanwhile, an area of low pressure is bringing unsettled weather to the central part of the South China Sea.

    Area forecasts for the next 24 hours

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

    Nan'ao, Shanwei and South of Hong Kong:
    East to southeast force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

    Shangchuan Dao:
    East force 4 to 5.
    Isolated squally showers and thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    East to southeasterly winds of force 5 to 6, occasionally force 7. Scattered squally showers and thunderstorms.

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

    Waglan Island Wind east force 4
      Visibility 40 Kilometres

    Shantou Wind east-southeast force 2
      Visibility 30 Kilometres

    Dongsha Wind southeast force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind east-northeast force 4

    Macau Wind east force 2
      Visibility 26 Kilometres

    Xisha Wind north-northeast force 2
      Visibility 30 Kilometres

  • Explanation of Seas or Sea Waves
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 09:30 HKT 14/JUL/2017
    (Next update at 17:30 HKT 14/JUL/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  100/10-15
                  VRB/15G25 IN TS
       OFFSHORE:  100/15                               29-34
   B.   2000 FT:  140/15-20                            23
   C.   5000 FT:  120/15                               19
   D.  10000 FT:  120/20                               11
   E.  18000 FT:  100/15                               MS3
   F.  24000 FT:  110/15                               MS13
   G.  30000 FT:  090/10                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE APART FROM ISOLATED SHOWERS. A FEW
      ISOLATED THUNDERSTORMS LATER.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT TEMPO FEW CB 1000 FT SCT 2000 FT
      BKN 4000 FT
   K. VISIBILITY    : 10 KM.  TEMPO 4000 M IN SHOWERS. 2000M IN TS
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 11600 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS. MOD OFFSHORE AND NEAR HILLS
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EAST TO SOUTHEASTERLY WINDS.  MAINLY
     FINE WITH A FEW ISOLATED 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 11:17 HKT on 14 Jul 17

    VHHK SIGMET 1 VALID 140317/140715 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1930 E11618 - N1718 E11430 - N1800 E11354 - N2012 E11530 - N1930 E11618 TOP FL470 MOV NW 15KT 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 14/Jul/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     33.5 C
Minimum Air Temperature                     28.2 C
Grass Minimum Temperature                   27.4 C
Relative Humidity                        68 - 87 Percent
Rainfall                                      trace 
Total rainfall since 1st January          1340.9 mm
Against an average of                     1238.9 mm

Other Stations                Min                  Max
King's Park                  27.7 C               33.0 C
Wong Chuk Hang               26.6 C               32.5 C
Ta Kwu Ling                  25.3 C               34.1 C
Lau Fau Shan                 26.2 C               33.5 C
Tai Po                       26.5 C               31.3 C
Sha Tin                      26.9 C               32.9 C
Tuen Mun                     26.5 C               33.3 C
Tseung Kwan O                26.5 C               32.8 C
Sai Kung                     27.7 C               32.1 C
Cheung Chau                  26.7 C               31.5 C
Chek Lap Kok                 27.8 C               34.9 C
Tsing Yi                     27.1 C               33.5 C
Shek Kong                    25.7 C               33.9 C
Tsuen Wan Ho Koon            25.5 C               32.3 C
Tsuen Wan Shing Mun Valley   25.7 C               32.9 C
Hong Kong Park               27.0 C               32.6 C
Shau Kei Wan                 27.0 C               31.8 C
Kowloon City                 27.7 C               32.8 C
Happy Valley                 27.0 C               33.4 C
Wong Tai Sin                 26.6 C               32.7 C
Stanley                      27.6 C               32.0 C
Kwun Tong                    27.6 C               31.7 C
Sham Shui Po                 27.8 C               33.5 C
Kai Tak Runway Park          27.2 C               31.5 C
Yuen Long Park               25.7 C               34.1 C
Tai Mei Tuk               27.1 C               33.2 C

Duration of sunshine (King's Park):              9.7 H
The mean UV index recorded at King's Park yesterday was 6,
the UV intensity was High.
The maximum UV index for yesterday was 12.
 

Yesterday's (13 Jul 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                               0.08
Yuen Ng Fan                         0.11
Tai Mei Tuk                         0.11
Sha Tau Kok                         0.10
Kwun Tong                           0.11
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 13 Jul
     2003copy right image | Important notices | Privacy policy Last revision date: <14 Jul 2017> 

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