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Bulletin issued at 16:02 HKT 08/Jul/2017

At 4 p.m. at the Hong Kong Observatory the air temperature was 28 degrees Celsius and the relative humidity 89 per cent.
During the past hour the mean UV Index recorded at King's Park was 2. The intensity of UV radiation was low.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 5:30 p.m. today. Isolated thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

King's Park 28 degrees;
Wong Chuk Hang 29 degrees;
Ta Kwu Ling 27 degrees;
Lau Fau Shan 29 degrees;
Tai Po 27 degrees;
Sha Tin 30 degrees;
Tuen Mun 28 degrees;
Tseung Kwan O 29 degrees;
Sai Kung 29 degrees;
Cheung Chau 27 degrees;
Chek Lap Kok 28 degrees;
Tsing Yi 29 degrees;
Shek Kong 27 degrees;
Tsuen Wan Ho Koon 26 degrees;
Tsuen Wan Shing Mun Valley 28 degrees;
Hong Kong Park 28 degrees;
Shau Kei Wan 28 degrees;
Kowloon City 29 degrees;
Happy Valley 29 degrees;
Wong Tai Sin 29 degrees;
Stanley 29 degrees;
Kwun Tong 29 degrees;
Sham Shui Po 29 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 28 degrees;
Tai Mei Tuk 28 degrees.

Between 2:45 and 3:45 p.m., lightning was detected within Lantau, New Territories East and New Territories West. The rainfall recorded in various regions were:

Yuen Long 0 to 12 mm;
North District 0 to 12 mm;
Islands District 0 to 10 mm;
Tsuen Wan 0 to 4 mm;
Sha Tin 0 to 2 mm;
Tuen Mun 0 to 2 mm;
Tai Po 0 to 2 mm;
Central & Western District 0 to 1 mm;
Kwai Tsing 0 to 1 mm;
Sham Shui Po 0 to 1 mm.


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


Climatological Information for 8 Jul

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Bulletin updated at 16:15 HKT 08/Jul/2017

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

A broad trough of low pressure is bringing showers and thunderstorms to the northern part of the South China Sea and the coast of Guangdong. Locally, about 10 millimetres of rainfall were recorded over Lantau Island and Yuen Long in the afternoon.

Weather forecast for tonight and tomorrow

Mainly cloudy with a few showers. Isolated thunderstorms at first. Sunny intervals during the day tomorrow. Temperatures will range between 27 and 31 degrees. Moderate southerly winds.

Outlook : Sunny periods and a few showers in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 09/07/2017; 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 08/Jul/2017

N0 WARNING.

GENERAL SITUATION AT 072100 UTC:
TROUGH 21N 107E 21N 110E 23N 116E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 080100 UTC:

HONG KONG= S 5-6. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S UP TO 2 M. TEMP 30-28 C. =
KWANGTUNG= S 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S UP TO 2 M. =
TAIWAN STRAIT= S 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL S UP TO 2 M. =
BASHI= 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. =
PRATAS= S 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL S UP TO 2 M. =
BALINTANG= 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 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL S UP TO 2 M. =
PARACEL= S 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S UP TO 2 M. =
TONKIN= S 6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL S UP TO 2 M. =
DANANG= S 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 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

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    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 16:30 HKT 08/Jul/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 4:30 p.m. on 08 July 2017

    Warnings:
    Strong winds in south of Hong Kong and Shangchuan Dao.

    Weather Situation:
    A trough of low pressure is bringing unsettled weather to the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South force 4 to 5.
    Scattered squally showers and thunderstorms.
    Moderate seas.

    Nan'ao and Shanwei:
    South force 4 to 5.
    Isolated squally showers and thunderstorms.
    Moderate seas.

    South of Hong Kong and Shangchuan Dao:
    South force 4 to 5, occasionally force 6.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    Southerly winds of force 4 to 5, becoming southeasterly winds of force 4 to 5 later. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind south force 3
      Visibility 13 Kilometres

    Shantou Wind southeast force 2
      Visibility 30 Kilometres

    Dongsha Wind south force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind south-southeast force 4

    Macau Wind south-southeast force 2
      Visibility 12 Kilometres

    Xisha Wind south-southwest force 3
      Visibility 19 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 09:00 HKT 08/JUL/2017
    (Next update at 17:30 HKT 08/JUL/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A TROUGH OF LOW PRESSURE IS BRINGING UNSETTLED
     WEATHER TO 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:  180/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  180/15-20                            26-30
   B.   2000 FT:  180/20-25                            23
   C.   5000 FT:  190/25                               19
   D.  10000 FT:  200/25                               11
   E.  18000 FT:  180/15                               MS4
   F.  24000 FT:  160/10                               MS13
   G.  30000 FT:  090/10                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH SHOWERS. SHOWERS WILL BE
      HEAVY AT TIMES. THERE WILL BE A FEW SQUALLY
      THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3000 FT.  TEMPO FEW CB 1000 FT
      SCT 2000 FT  BKN 4000 FT.
   K. VISIBILITY    : 10 KM. TEMPO 3000 M IN SHOWERS. TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 11200 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS AND  NEAR HILLS. MOD OFFSHORE.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHERLY WINDS, OCCASIONALLY FRESH
     OFFSHORE AT FIRST. MAINLY CLOUDY WITH SHOWERS
     AND A FEW ISOLATED SQUALLY THUNDERSTORMS.=

    ===================================================================
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 16:00 HKT on 08 Jul 17

    VHHK SIGMET 2 VALID 080500/080800 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2218 E11318 - N2224 E11330 - N2300 E11536 - N2130 E11400 - N2112 E11300 - N2218 E11318 TOP FL400 MOV N 05KT WKN= VHHK SIGMET 3 VALID 080800/081200 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2230 E11524 - N2200 E11500 - N2124 E11348 - N2224 E11400 - N2230 E11500 - N2230 E11524 TOP FL380 MOV NNE 05KT WKN=

    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 08/Jul/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     29.8 C
Minimum Air Temperature                     26.0 C
Grass Minimum Temperature                   25.1 C
Relative Humidity                        77 - 97 Percent
Rainfall                                    35.8 mm 
Total rainfall since 1st January          1326.3 mm
Against an average of                     1176.7 mm

Other Stations                Min                  Max
King's Park                  25.7 C               30.4 C
Wong Chuk Hang               25.5 C               29.2 C
Ta Kwu Ling                  25.4 C               31.0 C
Lau Fau Shan                 24.4 C               30.5 C
Tai Po                       25.3 C               30.0 C
Sha Tin                      25.6 C               30.8 C
Tuen Mun                     25.0 C               31.1 C
Tseung Kwan O                25.2 C               31.1 C
Sai Kung                     25.8 C               32.2 C
Cheung Chau                  24.6 C               28.6 C
Chek Lap Kok                 25.9 C               31.1 C
Tsing Yi                     24.9 C               29.8 C
Shek Kong                    25.1 C               30.7 C
Tsuen Wan Ho Koon            24.3 C               26.8 C
Tsuen Wan Shing Mun Valley   25.0 C               29.0 C
Hong Kong Park               24.9 C               30.7 C
Shau Kei Wan                 25.4 C               30.3 C
Kowloon City                 25.0 C               30.8 C
Happy Valley                 25.7 C               30.2 C
Wong Tai Sin                 25.4 C               30.7 C
Stanley                      25.2 C               29.9 C
Kwun Tong                    25.4 C               30.3 C
Sham Shui Po                 25.0 C               30.2 C
Kai Tak Runway Park          25.8 C               30.8 C
Yuen Long Park               24.9 C               31.0 C
Tai Mei Tuk               25.3 C               30.1 C

Duration of sunshine (King's Park):              2.4 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 11.
 

Yesterday's (07 Jul 2017) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.07 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                           0.07
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                      0.12
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 07 Jul
     2003copy right image | Important notices | Privacy policy Last revision date: <08 Jul 2017> 

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