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Bulletin issued at 01:02 HKT 07/Nov/2017

At 1 a.m. at the Hong Kong Observatory the air temperature was 23 degrees Celsius and the relative humidity 76 per cent.

The air temperatures at other places were:

King's Park 23 degrees;
Wong Chuk Hang 24 degrees;
Ta Kwu Ling 21 degrees;
Lau Fau Shan 21 degrees;
Tai Po 22 degrees;
Sha Tin 23 degrees;
Tuen Mun 23 degrees;
Tseung Kwan O 22 degrees;
Sai Kung 22 degrees;
Cheung Chau 21 degrees;
Chek Lap Kok 22 degrees;
Tsing Yi 23 degrees;
Shek Kong 22 degrees;
Tsuen Wan Ho Koon 21 degrees;
Tsuen Wan Shing Mun Valley 23 degrees;
Hong Kong Park 23 degrees;
Shau Kei Wan 22 degrees;
Kowloon City 22 degrees;
Happy Valley 24 degrees;
Wong Tai Sin 23 degrees;
Stanley 23 degrees;
Kwun Tong 22 degrees;
Sham Shui Po 23 degrees;
Kai Tak Runway Park 23 degrees;
Yuen Long Park 23 degrees;
Tai Mei Tuk 22 degrees.


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


Climatological Information for 7 Nov

Regional Weather in Hong Kong

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Bulletin updated at 00:45 HKT 07/Nov/2017

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

The northeast monsoon affected southern China yesterday. Meanwhile, a broad band of clouds covered the region. Locally, it was mainly cloudy with one or two rain patches. The broad band of clouds will continue to cover the coast of Guangdong and the northern part of the South China Sea today and tomorrow.

Weather forecast for Hong Kong

Mainly cloudy with a few rain patches. Temperatures will range between 21 and 25 degrees. Moderate northeasterly winds, occasionally fresh offshore.

Outlook : Mainly cloudy on Wednesday. Sunny periods in the latter part of this week.


(The above forecast period is valid up to 23:59 HKT today, 07/11/2017; 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 06/Nov/2017

GALE WARNING AREAS: KWANGTUNG, PRATAS AND PARACEL.

GENERAL SITUATION AT 060900 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 061300 UTC:

HONG KONG= NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 2 M. TEMP 21-25 C. =
KWANGTUNG= NE 6-7, UP TO 8 AT FIRST. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 6 M AT FIRST. SWELL NE 3-4 M. =
TAIWAN STRAIT= NE 6-7. RAIN PATCHES. SEA 3-4 M. SWELL NE 3-4 M. =
BASHI= E 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 3-4 M. =
PRATAS= E TO NE 6-7, UP TO 8 AT FIRST. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 6 M AT FIRST. SWELL NE 3-4 M. =
BALINTANG= E 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 3-4 M. =
SCARBOROUGH= NE 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL NE 3-4 M. =
PARACEL= NE 6-7, UP TO 8 AT FIRST. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 6 M AT FIRST. SWELL NE 3-4 M. =
TONKIN= NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 2-3 M. =
DANANG= NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY 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.


  • 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 23:30 HKT 06/Nov/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 06 November 2017

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

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Northeast force 6, occasionally force 7.
    Isolated squally showers and thunderstorms.
    Rough seas.

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

    Outlook for the next 48 hours
    East to northeasterly winds of force 6 to 7. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind north force 4
      Visibility 13 Kilometres

    Shantou Wind east-southeast force 1
      Visibility 14 Kilometres

    Dongsha Wind northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind north force 4

    Macau Wind north-northeast force 4
      Visibility 7 Kilometres

    Xisha Wind east force 3
      Visibility 6 Kilometres in showers

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

    Bulletin issued at 01:30 HKT 07/NOV/2017
    (Next update at 9:00-9:30 HKT 07/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 SOUTHERN
     CHINA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  020/10 TEMPO VRB/05
       OFFSHORE:  040/15-20, OCNL 25                   20-26
   B.   2000 FT:  080/15-20, OCNL 25                   17
   C.   5000 FT:  120/30                               16
   D.  10000 FT:  140/15                               9
   E.  18000 FT:  160/10                               MS6
   F.  24000 FT:  200/25                               MS15
   G.  30000 FT:  200/30                               MS30
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW RAIN PATCHES.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3500 FT  SCT 6000 FT
   K. VISIBILITY    : 7 KM. TEMPO 4000 M IN RAIN.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 9400 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE NORTHEASTERLY WINDS, OCCASIONALLY FRESH
     OFFSHORE. MAINLY CLOUDY WITH A FEW RAIN PATCHES.=

    ===================================================================
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 11:05 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

    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 07/Nov/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     25.8 C
Minimum Air Temperature                     21.3 C
Grass Minimum Temperature                   20.3 C
Relative Humidity                        59 - 83 Percent
Rainfall                                      trace 
Total rainfall since 1st January          2541.2 mm
Against an average of                     2345.1 mm

Other Stations                Min                  Max
King's Park                  20.3 C               26.0 C
Wong Chuk Hang               21.8 C               26.2 C
Ta Kwu Ling                  19.3 C               25.3 C
Lau Fau Shan                 19.2 C               26.1 C
Tai Po                       21.1 C               24.4 C
Sha Tin                      21.4 C               25.6 C
Tuen Mun                     20.9 C               25.9 C
Tseung Kwan O                20.1 C               26.4 C
Sai Kung                     21.2 C               25.1 C
Cheung Chau                  19.9 C               25.6 C
Chek Lap Kok                 20.9 C               26.6 C
Tsing Yi                     21.3 C               26.2 C
Shek Kong                    19.8 C               25.8 C
Tsuen Wan Ho Koon            18.6 C               24.1 C
Tsuen Wan Shing Mun Valley   19.3 C               25.8 C
Hong Kong Park               20.9 C               25.5 C
Shau Kei Wan                 20.5 C               26.8 C
Kowloon City                 19.7 C               26.8 C
Happy Valley                 21.5 C               26.7 C
Wong Tai Sin                 20.3 C               27.0 C
Stanley                      21.6 C               26.7 C
Kwun Tong                    20.3 C               25.7 C
Sham Shui Po                 20.6 C               26.5 C
Kai Tak Runway Park          21.4 C               26.2 C
Yuen Long Park               20.2 C               26.4 C
Tai Mei Tuk               20.8 C               25.6 C

Duration of sunshine (King's Park):              1.5 H
The mean UV index recorded at King's Park yesterday was 2,
the UV intensity was Low.
The maximum UV index for yesterday was 4.
Sea surface temperature (Waglan Island):        24.8 C 

Yesterday's (06 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                      0.14
Chek Lap Kok                        0.15

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 06 Nov
     2003copy right image | Important notices | Privacy policy Last revision date: <07 Nov 2017> 

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