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Bulletin issued at 01:02 HKT 11/Nov/2017

At 1 a.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 79 per cent.

The air temperatures at other places were:

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

Here is the information on Tropical Storm Haikui at 11:00 p.m. yesterday:
Location: 16.9 degrees north, 117.2 degrees east.


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


Climatological Information for 11 Nov

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Bulletin updated at 00:45 HKT 11/Nov/2017

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

An anticyclone aloft brought generally fine weather to southeastern China yesterday. Locally, it was mainly fine. Visibility over parts of the territory was rather low in the afternoon.

Besides, Haikui intensified from a tropical depression into a tropical storm yesterday. At 11 p.m. last night, Haikui was centred about 520 kilometres east of Xisha. It is forecast to move northwest or west-northwest at about 14 kilometres per hour across the central part of the South China Sea and intensify gradually. The northeast monsoon is expected to strengthen slightly today and tomorrow. Under the combined effect of the monsoon and Haikui, it will be windy with rain over the south China coast and the northern part of the South China Sea early next week.

Weather forecast for Hong Kong

Cloudy periods in the morning and at night. Mainly fine during the day. Temperatures will range between 23 and 28 degrees. Moderate to fresh east to northeasterly winds, occasionally strong offshore later.

Outlook : Windy with a few rain patches on Sunday and Monday.


(The above forecast period is valid up to 23:59 HKT today, 11/11/2017; 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 21:00 HKT 10/Nov/2017

STORM WARNING AREA: SCARBOROUGH.
GALE WARNING AREAS: KWANGTUNG, TAIWAN STRAIT, BASHI, PRATAS AND PARACEL.

GENERAL SITUATION AT 100900 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS. FOR DETAILS ON TROPICAL STORM HAIKUI (1724), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 101300 UTC:

HONG KONG= E TO NE 5-6, BEC 7. DOWN TO 4000 M IN SOME HAZE. RAIN PATCHES LATER. SEA 2-3 M, BEC 4 M. SWELL NE 2 M. TEMP 23-28 C. =
KWANGTUNG= NE 6-7, UP TO 8 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 6 M LATER. SWELL NE 2-3 M, SE 3 M LATER. =
TAIWAN STRAIT= NE 6-7, 8 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS LATER. SEA 3-4 M, 6 M LATER. SWELL NE 2-3 M. =
BASHI= E TO SE 6-7, UP TO 8 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 6 M LATER. SWELL NE 2-3 M. =
PRATAS= NE 7-8, OCNL 9. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 8 M. SWELL NE 3 M, SE 3 M LATER. =
BALINTANG= E TO SE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 2-3 M. =
SCARBOROUGH= CYCLONIC 8-9, OCNL 10. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 10 M. SWELL NE 3-5 M, SE 3 M LATER. =
PARACEL= NE 7-8, CYCLONIC UP TO 9 LATER. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 4-6 M, UP TO 8 M LATER. SWELL NE 2-3 M. =
TONKIN= NE 5-6. RAIN PATCHES. SEA 2-3 M. SWELL NE 2 M. =
DANANG= NE 5-6. RAIN PATCHES. SEA 2-3 M. SWELL NE 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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    Bulletin issued at 00:30 HKT 11/Nov/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 a.m. on 11 November 2017

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

    Weather Situation:
    The northeast monsoon is affecting the south China coastal waters.

    At 11 p.m., Tropical Storm Haikui with maximum sustained winds of about 75 kilometres per hour near its centre was located at 16.9 degrees north, 117.2 degrees east. It is forecast to move northwest or west-northwest at about 14 kilometres per hour across the central part of the South China Sea and intensify gradually.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 5 to 6, becoming force 7.
    A few rain patches later.
    Moderate to rough seas.

    Nan'ao, Shanwei and South of Hong Kong:
    Northeast force 6 to 7, up to force 8 later.
    Isolated squally showers and thunderstorms.
    Rough seas, becoming very rough seas later.

    Shangchuan Dao:
    Northeast force 6 to 7.
    Isolated squally showers and thunderstorms.
    Rough seas.

    Outlook for the next 48 hours
    Northeasterly winds of force 6 to 7, occasionally force 8. Occasional heavy squally showers and thunderstorms.

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

    Waglan Island Wind northeast force 4
      Visibility 16 Kilometres

    Shantou Wind east-northeast force 2
      Visibility 19 Kilometres

    Dongsha Wind northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind east-northeast force 3

    Macau Wind east-southeast force 1
      Visibility 7 Kilometres

    Xisha Wind northeast force 3
      Visibility 10 Kilometres

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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 11/NOV/2017
    (Next update at 9:00-9:30 HKT 11/NOV/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
     AT 11 P.M. LAST NIGHT, TROPICAL STORM HAIKUI WAS
     LOCATED NEAR 16.9 DEGREES NORTH, 117.2 DEGREES
     EAST. IT IS FORECAST TO MOVE NORTHWEST OR
     WEST-NORTHWEST AT ABOUT 8 KNOTS ACROSS THE
     CENTRAL PART OF THE SOUTH CHINA SEA AND
     INTENSIFY GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  070/10
       OFFSHORE:  080/15-20, OCNL 25 LATER             23-28
   B.   2000 FT:  060/15-20, UP TO 25 LATER            22
   C.   5000 FT:  050/15-20                            18
   D.  10000 FT:  090/10                               9
   E.  18000 FT:  260/10                               MS5
   F.  24000 FT:  270/20                               MS14
   G.  30000 FT:  260/25                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      CLOUDY PERIODS AT FIRST, MAINLY FINE LATER.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 4500 FT
   K. VISIBILITY    : 9 KM.
   L. 0 DEG. C LEVEL: 16000 FT      10 DEG. C LEVEL(S) : 9000 FT
   M. TURBULENCE    : MOD TO SEV
   N. SEA STATE     : 2.0-3.0 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EAST TO NORTHEASTERLY WINDS,
     OCCASIONALLY STRONG OFFSHORE. MAINLY FINE AT
     FIRST, CLOUDY PERIODS LATER.=

    ===================================================================
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.

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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 11:05 HKT on 06 Nov 17

    VHHK SIGMET 1 VALID 060305/060705 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1742 E11342 - N1654 E11412 - N1642 E11400 - N1806 E11242 - N1812 E11324 - N1742 E11342 TOP FL420 MOV NW 10KT WKN= VHHK SIGMET 3 VALID 052305/060305 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1748 E11454 - N1642 E11400 - N1848 E11212 - N1906 E11336 - N1748 E11454 TOP FL450 MOV WNW 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

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    Bulletin issued at 00:30 HKT 11/Nov/2017


    Tropical Cyclone Warning

    At 101500 UTC, Tropical Storm Haikui (1724) with central pressure 990 hectopascals was centred within 90 nautical miles of one six point nine degrees north (16.9 N) one one seven point two degrees east (117.2 E) and is forecast to move west-northwest at about 8 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 40 knots.

    Radius of over 33 knot winds 30 nautical miles.
    Radius of over 2 metre waves 90 nautical miles.

    Forecast position and intensity at 111500 UTC
    One seven point seven degrees north (17.7 N)
    One one four point three degrees east (114.3 E)
    Maximum winds 50 knots.

    Forecast position and intensity at 121500 UTC
    One seven point zero degrees north (17.0 N)
    One one one point eight degrees east (111.8 E)
    Maximum winds 40 knots.

    Forecast position and intensity at 131500 UTC
    One six point three degrees north (16.3 N)
    One one zero point three degrees east (110.3 E)
    Maximum winds 25 knots.

    Forecast position and intensity at 141500 UTC
    Dissipated over sea.



    The Hong Kong Observatory's tropical cyclone warnings for shipping are issued about one and a half hours after the time of observation. They incorporate additional information derived from surface and upper-air data and may therefore be slightly different from the real-time satellite or radar-based positions given in the hourly bulletins for public.

    While the forecast positions and track indicate the most likely future path of the tropical cyclone, they may deviate from the actual path taken by the storm.

    Tropical Cyclone Track
    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 11/Nov/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     28.4 C
Minimum Air Temperature                     22.9 C
Grass Minimum Temperature                   21.4 C
Relative Humidity                        62 - 81 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2541.5 mm
Against an average of                     2348.4 mm

Other Stations                Min                  Max
King's Park                  22.2 C               29.7 C
Wong Chuk Hang               22.8 C               30.3 C
Ta Kwu Ling                  21.2 C               30.8 C
Lau Fau Shan                 21.0 C               28.8 C
Tai Po                       22.5 C               27.7 C
Sha Tin                      22.4 C               30.0 C
Tuen Mun                     21.6 C               30.2 C
Tseung Kwan O                21.6 C               30.0 C
Sai Kung                     22.6 C               26.5 C
Cheung Chau                  21.9 C               28.0 C
Chek Lap Kok                 23.5 C               29.1 C
Tsing Yi                     23.1 C               30.1 C
Shek Kong                    21.7 C               31.1 C
Tsuen Wan Ho Koon            20.3 C               30.0 C
Tsuen Wan Shing Mun Valley   21.7 C               30.6 C
Hong Kong Park               22.7 C               28.9 C
Shau Kei Wan                 22.5 C               27.1 C
Kowloon City                 21.7 C               30.7 C
Happy Valley                 22.8 C               31.0 C
Wong Tai Sin                 21.9 C               30.9 C
Stanley                      22.7 C               27.8 C
Kwun Tong                    22.4 C               29.6 C
Sham Shui Po                 22.7 C               31.9 C
Kai Tak Runway Park          23.3 C               27.4 C
Tai Mei Tuk               22.1 C               29.1 C

Duration of sunshine (King's Park):              9.2 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 7.
Sea surface temperature (Waglan Island):        24.4 C 

Yesterday's (10 Nov 2017) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 to
0.15 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                         0.15
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 10 Nov
     2003copy right image | Important notices | Privacy policy Last revision date: <11 Nov 2017> 

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