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Bulletin issued at 06:02 HKT 02/Nov/2017

At 6 a.m. at the Hong Kong Observatory the air temperature was 21 degrees Celsius and the relative humidity 72 per cent.

The air temperatures at other places were:

King's Park 21 degrees;
Wong Chuk Hang 19 degrees;
Ta Kwu Ling 15 degrees;
Lau Fau Shan 19 degrees;
Tai Po 19 degrees;
Sha Tin 17 degrees;
Tuen Mun 20 degrees;
Tseung Kwan O 18 degrees;
Sai Kung 21 degrees;
Cheung Chau 19 degrees;
Chek Lap Kok 21 degrees;
Tsing Yi 19 degrees;
Shek Kong 17 degrees;
Tsuen Wan Ho Koon 19 degrees;
Tsuen Wan Shing Mun Valley 17 degrees;
Hong Kong Park 20 degrees;
Shau Kei Wan 21 degrees;
Kowloon City 21 degrees;
Happy Valley 19 degrees;
Wong Tai Sin 21 degrees;
Stanley 21 degrees;
Kwun Tong 20 degrees;
Sham Shui Po 20 degrees;
Kai Tak Runway Park 21 degrees;
Yuen Long Park 18 degrees;
Tai Mei Tuk 19 degrees.

Here is the information on Tropical Depression at 5 a.m.:
Location: 12.2 degrees north, 117.4 degrees east.


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


Climatological Information for 2 Nov

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 05:45 HKT 02/Nov/2017

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

The northeast monsoon continues to bring fine weather to southern China.

At 5 a.m., the tropical depression west of the Philippines was centred about 390 kilometres east-northeast of Nansha Dao. It is forecast to move west at about 20 kilometres per hour across the southern part of the South China Sea and intensify gradually. Meanwhile, the tropical depression over the seas south of Vietnam was centred about 360 kilometres south of Ho Chi Minh City. It is forecast to move west slowly towards the Gulf of Thailand.

Weather forecast for today

It will be fine. Dry during the day with a maximum temperature of about 28 degrees. Moderate northeasterly winds.

Outlook : Becoming cloudy with a few rain patches in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 02/11/2017; 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 01/Nov/2017

N0 WARNING.

GENERAL SITUATION AT 010900 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS. FOR DETAILS ON TROPICAL DEPRESSION NEAR THE PHILIPPINES, PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 011300 UTC:

HONG KONG= NE 5-6. FINE. SEA 2-3 M. SWELL NE 2 M. TEMP 21-28 C. =
KWANGTUNG= NE 6-7. FINE. SEA 3-4 M. SWELL NE 2-3 M. =
TAIWAN STRAIT= NE 5-6, OCNL 7. FINE. SEA 3 M. SWELL NE 2-3 M. =
BASHI= NE 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL NE 3 M. =
PRATAS= NE 6-7. ISOL SHOWERS. SEA 3-4 M. SWELL NE 3 M. =
BALINTANG= NE 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL NE 3-4 M. =
SCARBOROUGH= NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 3-4 M. =
PARACEL= NE 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL NE 3-4 M. =
TONKIN= NE 5-6. RAIN PATCHES. SEA 2-3 M. SWELL NE 2 M. =
DANANG= NE 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL NE 3-4 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 05:30 HKT 02/Nov/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 02 November 2017

    Warnings:
    Strong winds in all areas.

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

    At 5 a.m., the tropical depression west of the Philippines with maximum sustained winds of about 55 kilometres per hour near its centre was located near 12.2 degrees north, 117.4 degrees east. It is forecast to move west at about 20 kilometres per hour across the southern part of the South China Sea and intensify gradually.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Northeast force 5, occasionally force 6.
    Moderate to rough seas.

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    Northeast force 6 to 7.
    Rough seas.

    Outlook for the next 48 hours
    North to northeasterly winds of force 6 to 7, up to force 8 later. Isolated showers and thunderstorms.

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

    Waglan Island Wind north force 3
      Visibility 20 Kilometres

    Shantou Wind east-northeast force 1
      Visibility 13 Kilometres

    Dongsha Wind northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind northeast force 4

    Macau Wind north force 1
      Visibility 12 Kilometres

    Xisha Wind northeast force 3
      Visibility 16 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 02/NOV/2017
    (Next update at 9:00-9:30 HKT 02/NOV/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A DRY NORTHEAST MONSOON CONTINUES TO BRING FINE
     WEATHER TO SOUTHERN CHINA. AT 11 P.M. LAST
     NIGHT, THE TROPICAL DEPRESSION WEST OF THE
     PHILIPPINES WAS LOCATED NEAR 11.9 DEGREES NORTH,
     118.9 DEGREES EAST. IT IS FORECAST TO MOVE WEST
     AT ABOUT 10 KNOTS ACROSS THE SOUTHERN PART OF
     THE SOUTH CHINA SEA..
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  080/5-10
       OFFSHORE:  070/15                               19-28
   B.   2000 FT:  070/10-15                            17
   C.   5000 FT:  060/15                               16
   D.  10000 FT:  340/20                               8
   E.  18000 FT:  250/10                               MS4
   F.  24000 FT:  210/15                               MS14
   G.  30000 FT:  270/20                               MS29
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      4700-5000 FT
   I. WEATHER       : 
      FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      NO CLOUDS OF HEIGHT AT OR BELOW 10,000 FT.
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 9000 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE EAST TO NORTHEASTERLY WINDS.
     FINE.=

    ===================================================================
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 10:01 HKT on 01 Nov 17

    VHHK SIGMET Z99 VALID 010201/010211 VHHH- VHHK HONG KONG FIR THIS IS A TEST SIGMET, PLEASE DISREGARD. TEST TC ADVISORY NUMBER 01 RECEIVED FM TOKYO TCAC AT 010200Z= =

    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

    Tropical Cyclone Warning |  Track and Positions of Tropical Cyclones
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    Bulletin issued at 06:30 HKT 02/Nov/2017


    Tropical Cyclone Warning

    At 012100 UTC, Tropical Depression to the west of the Philippines with central pressure 1000 hectopascals was centred within 90 nautical miles of one two point two degrees north (12.2 N) one one seven point five degrees east (117.5 E) and is forecast to move west at about 10 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 30 knots.

    Radius of over 2 metre waves 60 nautical miles.

    Forecast position and intensity at 022100 UTC
    One two point two degrees north (12.2 N)
    One one four point zero degrees east (114.0 E)
    Maximum winds 45 knots.

    Forecast position and intensity at 032100 UTC
    One one point eight degrees north (11.8 N)
    One one zero point six degrees east (110.6 E)
    Maximum winds 60 knots.

    Forecast position and intensity at 042100 UTC
    Dissipated over land.



    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 02/Nov/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     26.4 C
Minimum Air Temperature                     20.5 C
Grass Minimum Temperature                   19.0 C
Relative Humidity                        47 - 78 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2540.9 mm
Against an average of                     2334.6 mm

Other Stations                Min                  Max
King's Park                  20.1 C               26.7 C
Wong Chuk Hang               20.3 C               27.3 C
Ta Kwu Ling                  15.3 C               27.8 C
Lau Fau Shan                 17.5 C               27.2 C
Tai Po                       19.0 C               25.7 C
Sha Tin                      18.6 C               26.7 C
Tuen Mun                     19.1 C               27.8 C
Tseung Kwan O                18.5 C               27.4 C
Sai Kung                     19.9 C               25.2 C
Cheung Chau                  20.4 C               26.8 C
Chek Lap Kok                 21.1 C               27.9 C
Tsing Yi                     20.7 C               27.8 C
Shek Kong                    18.2 C               28.0 C
Tsuen Wan Ho Koon            18.6 C               26.5 C
Tsuen Wan Shing Mun Valley   19.3 C               28.4 C
Hong Kong Park               20.4 C               27.2 C
Shau Kei Wan                 19.7 C               26.2 C
Kowloon City                 19.6 C               27.2 C
Happy Valley                 20.6 C               28.6 C
Wong Tai Sin                 20.1 C               28.1 C
Stanley                      21.0 C               26.2 C
Kwun Tong                    19.7 C               26.6 C
Sham Shui Po                 19.8 C               28.3 C
Kai Tak Runway Park          20.9 C               27.0 C
Yuen Long Park               18.6 C               28.5 C
Tai Mei Tuk               19.6 C               26.2 C

Duration of sunshine (King's Park):              10.3 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):        25.4 C 

Yesterday's (01 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                               0.10
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 01 Nov
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