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Bulletin issued at 00:02 HKT 07/Nov/2019

At midnight at the Hong Kong Observatory the air temperature was 23 degrees Celsius and the relative humidity 77 per cent.

The air temperatures at other places were:

King's Park 22 degrees;
Wong Chuk Hang 21 degrees;
Ta Kwu Ling 20 degrees;
Lau Fau Shan 20 degrees;
Tai Po 21 degrees;
Sha Tin 21 degrees;
Tuen Mun 21 degrees;
Tseung Kwan O 20 degrees;
Sai Kung 22 degrees;
Cheung Chau 21 degrees;
Chek Lap Kok 23 degrees;
Tsing Yi 23 degrees;
Shek Kong 20 degrees;
Tsuen Wan Ho Koon 19 degrees;
Tsuen Wan Shing Mun Valley 21 degrees;
Hong Kong Park 23 degrees;
Shau Kei Wan 22 degrees;
Kowloon City 22 degrees;
Happy Valley 22 degrees;
Wong Tai Sin 22 degrees;
Stanley 23 degrees;
Kwun Tong 21 degrees;
Sham Shui Po 22 degrees;
Kai Tak Runway Park 23 degrees;
Yuen Long Park 20 degrees;
Tai Mei Tuk 22 degrees.

Here is the information on Tropical Storm Nakri at 11:00 p.m. yesterday:
Location: 13.7 degrees north, 116.6 degrees east.


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


Climatological Information for 7 Nov

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Bulletin updated at 00:00 HKT 07/Nov/2019

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

A dry northeast monsoon continued to bring fine weather to southern China yesterday. Locally, it was fine and dry. The relative humidity over the territory once fell to around 60 per cent in the afternoon. The northeast monsoon is expected to persist over the south China coast for the rest of this week. It will be windy over the region and slightly cooler in the morning and at night.

Besides, Tropical Depression Nakri intensified into a tropical storm yesterday morning. At 11 p.m. last night, Nakri was centred about 440 kilometres north-northeast of Nansha. It is forecast to be slow-moving, lingering over the central and southern parts of the South China Sea.

Weather forecast for Hong Kong (Thursday, 7 Nov 2019)

Mainly fine. The minimum temperature in the morning will be about 21 degrees in the urban areas, and a couple of degrees lower in the New Territories. Dry during the day with a maximum temperature of around 27 degrees. Moderate easterly winds, becoming northerlies, fresh at times.

Outlook : Mainly fine and dry in the following couple of days. Slightly cooler in the morning and at night. Windy on Saturday.


(The above forecast period is valid up to 23:59 HKT today, 07/11/2019; 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/2019

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

GENERAL SITUATION AT 060900 UTC:
FOR DETAILS ON TROPICAL STORM NAKRI (1924), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS. THE NORTHEAST MONSOON IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 061300 UTC:

HONG KONG= NE 5-6. FINE. SEA 2-3 M. SWELL NE 3 M, SE 3 M. TEMP 21-27 C. =
KWANGTUNG= NE 6-7, UP TO 8 IN E. FINE. SEA 3-4 M, UP TO 6 M IN E. SWELL NE 3 M, SE 3 M. =
TAIWAN STRAIT= NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 3-4 M. =
BASHI= NE 7-8. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL NE 3-4 M. =
PRATAS= NE 7-8. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL NE 3-4 M, SE 3-4 M. =
BALINTANG= NE 7-8. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL NE 3-4 M. =
SCARBOROUGH= NE 7-8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL NE 4-5 M, SE 4-5 M. =
PARACEL= N TO NE 7-8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL NE 4-5 M, SE 4-5 M. =
TONKIN= NE 5-6. FINE. SEA 2-3 M. =
DANANG= N TO NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 4-5 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 23:30 HKT 06/Nov/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 06 November 2019

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

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

    At 11 p.m., Tropical Storm Nakri with maximum sustained winds of about 75 kilometres per hour near its centre was located at 13.7 degrees north, 116.6 degrees east. It is forecast to be slow-moving, lingering over the central and southern parts of the South China Sea.

    Area forecasts for the next 24 hours

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

    Nan'ao:
    Northeast force 6 to 7, occasionally force 8.
    Rough to very rough seas.

    Shanwei and South of Hong Kong:
    Northeast force 5 to 6, occasionally force 7.
    Moderate to rough seas.

    Shangchuan Dao:
    Northeast force 5 to 6.
    Moderate to rough seas.

    Outlook for the next 48 hours
    Northeasterly winds of force 6 to 7, up to force 8 in east.

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

    Waglan Island Wind east-northeast force 4
      Visibility 30 Kilometres

    Shantou Wind east force 2
      Visibility 28 Kilometres

    Huangmaozhou Wind east-northeast force 3

    Macau Wind southeast force 2
      Visibility 13 Kilometres

    Xisha Wind north-northeast force 4
      Visibility 11 Kilometres

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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 06/NOV/2019
    (Next update at 01:30 HKT 07/NOV/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
     
     AT 4 P.M., TROPICAL STORM NAKRI WAS LOCATED AT
     13.7 DEGREES NORTH, 116.4 DEGREES EAST. IT IS
     FORECAST TO BE SLOW-MOVING, LINGERING OVER THE
     CENTRAL AND SOUTHERN PARTS OF THE SOUTH CHINA
     SEA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  040/5-10
                  BECMG 020/10-15
       OFFSHORE:  080/15-20
                  BECMG 030/15-20                      26-20
   B.   2000 FT:  040/10-15                            17
   C.   5000 FT:  350/10                               13
   D.  10000 FT:  300/20                               9
   E.  18000 FT:  270/30                               MS5
   F.  24000 FT:  280/25                               MS13
   G.  30000 FT:  300/35                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 4000 FT
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 16000 FT      10 DEG. C LEVEL(S) : 9400 FT
   M. TURBULENCE    : MOD OFFSHORE
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTH TO NORTHEASTERLY WINDS,
     OCCASIONALLY STRONG OFFSHORE. MAINLY 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.

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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.

    There is no Significant Weather Information (SIGMET)

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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 07/Nov/2019


    Tropical Cyclone Warning

    At 061500 UTC, Tropical Storm Nakri (1924) with central pressure 988 hectopascals was centred within 90 nautical miles of one three point six degrees north (13.6 N) one one six point eight degrees east (116.8 E) and is forecast to be slow moving for the next 24 hours.

    Maximum winds near the centre are estimated to be 45 knots.

    Radius of over 33 knot winds 120 nautical miles over northern semicircle, 60 nautical miles elsewhere.
    Radius of over 2 metre waves 240 nautical miles.

    Forecast position and intensity at 071500 UTC
    One three point three degrees north (13.3 N)
    One one seven point two degrees east (117.2 E)
    Maximum winds 60 knots.

    Forecast position and intensity at 081500 UTC
    One two point nine degrees north (12.9 N)
    One one five point five degrees east (115.5 E)
    Maximum winds 65 knots.

    Forecast position and intensity at 091500 UTC
    One two point nine degrees north (12.9 N)
    One one two point five degrees east (112.5 E)
    Maximum winds 55 knots.

    Forecast position and intensity at 101500 UTC
    One three point three degrees north (13.3 N)
    One zero nine point three degrees east (109.3 E)
    Maximum winds 45 knots.

    Forecast position and intensity at 111500 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 07/Nov/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     26.5 C
Minimum Air Temperature                     22.3 C
Grass Minimum Temperature                   20.3 C
Relative Humidity                        58 - 77 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2382.7 mm
Against an average of                     2345.1 mm

Other Stations                Min                  Max
King's Park                  21.4 C               26.2 C
Wong Chuk Hang               20.6 C               25.7 C
Ta Kwu Ling                  16.5 C               27.8 C
Lau Fau Shan                 19.3 C               27.1 C
Tai Po                       19.9 C               25.8 C
Sha Tin                      19.2 C               26.5 C
Tuen Mun                     20.1 C               27.6 C
Tseung Kwan O                20.3 C               26.3 C
Sai Kung                     21.2 C               24.7 C
Cheung Chau                  20.5 C               27.4 C
Chek Lap Kok                 22.2 C               27.4 C
Tsing Yi                     21.9 C               27.4 C
Shek Kong                    18.2 C               27.7 C
Tsuen Wan Ho Koon            19.0 C               26.3 C
Tsuen Wan Shing Mun Valley   19.0 C               27.9 C
Hong Kong Park               21.7 C               26.8 C
Shau Kei Wan                 21.4 C               26.0 C
Kowloon City                 20.7 C               27.3 C
Happy Valley                 21.5 C               27.0 C
Wong Tai Sin                 21.4 C               26.4 C
Stanley                      22.1 C               25.0 C
Kwun Tong                    21.3 C               25.5 C
Sham Shui Po                 21.2 C               28.7 C
Kai Tak Runway Park          22.4 C               25.2 C
Yuen Long Park               18.7 C               28.4 C
Tai Mei Tuk               20.2 C               28.3 C

Duration of sunshine (King's Park):              9.0 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 6.
 

Yesterday's (06 Nov 2019) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 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                           0.09
Tap Mun                             0.09
Kat O                               0.11
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.11
Sha Tau Kok                         0.10
Kwun Tong                           0.13
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.15

Note

      

    1. From readings taken at various locations in Hong Kong in the
past, the hourly mean ambient gamma radiation dose rate may
vary between 0.06 and 0.3 microsievert per hour. (1
microsievert = 0.000001 sievert = 0.001 millisievert)

    2. Temporal variations are generally caused by changes in
meteorological conditions such as rainfall, wind and
barometric pressure.

    3. Spatial variations are generally caused by differences in
the radioactive content of local rock and soil.

    4. The data displayed is provisional. Only limited data
validation has been carried out.
    Climatological Information for 06 Nov
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