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Bulletin issued at 13:02 HKT 07/Nov/2019

At 1 p.m. at the Hong Kong Observatory the air temperature was 27 degrees Celsius and the relative humidity 44 per cent.
During the past hour the mean UV Index recorded at King's Park was 6. The intensity of UV radiation was high.

Please be reminded that:

The Fire Danger Warning is Red and the fire risk is extreme.

The air temperatures at other places were:

King's Park 25 degrees;
Wong Chuk Hang 27 degrees;
Ta Kwu Ling 26 degrees;
Lau Fau Shan 27 degrees;
Tai Po 25 degrees;
Sha Tin 26 degrees;
Tuen Mun 26 degrees;
Tseung Kwan O 27 degrees;
Sai Kung 25 degrees;
Cheung Chau 27 degrees;
Chek Lap Kok 27 degrees;
Tsing Yi 27 degrees;
Shek Kong 26 degrees;
Tsuen Wan Ho Koon 24 degrees;
Tsuen Wan Shing Mun Valley 27 degrees;
Hong Kong Park 27 degrees;
Shau Kei Wan 27 degrees;
Kowloon City 26 degrees;
Happy Valley 27 degrees;
Wong Tai Sin 27 degrees;
Stanley 26 degrees;
Kwun Tong 25 degrees;
Sham Shui Po 29 degrees;
Kai Tak Runway Park 27 degrees;
Yuen Long Park 27 degrees;
Tai Mei Tuk 26 degrees.

Here is the information on Severe Tropical Storm Nakri at noon:
Location: 13.5 degrees north, 117.3 degrees east.


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


Climatological Information for 7 Nov

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 12:45 HKT 07/Nov/2019

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

A dry northeast monsoon is bringing generally fine weather to southern China. Locally, the relative humidity over many places fell below 50 per cent around noon.

At noon, Severe Tropical Storm Nakri was centred about 470 kilometres 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 this afternoon and tonight

Fine and dry. Moderate northerly winds, fresh at times.

Outlook : Mainly fine in the next few days. Windy over the weekend with slightly cooler weather in the morning and at night.


(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 09:00 HKT 07/Nov/2019

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

GENERAL SITUATION AT 062100 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 070100 UTC:

HONG KONG= N TO NE 5-6, UP TO 7 LATER. FINE. SEA 2-3 M, UP TO 4 M LATER. SWELL NE 3 M, SE 2-3 M. TEMP 27-21 C. =
KWANGTUNG= N TO 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. ISOL 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 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, 9 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M, 8 M LATER. SWELL NE 4-5 M, SE 4 M. =
PARACEL= N TO NE 7-8, 9 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M, 8 M LATER. SWELL NE 4-5 M, SE 4 M. =
TONKIN= N TO NE 5-6. FINE. SEA 2-3 M. =
DANANG= N 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL NE 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 12:30 HKT 07/Nov/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 07 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 noon, Severe Tropical Storm Nakri with maximum sustained winds of about 90 kilometres per hour near its centre was located at 13.5 degrees north, 117.3 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:
    North to northeast force 5 to 6, up to force 7 later.
    Moderate to rough seas.

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

    Shanwei:
    Northeast force 6 to 7.
    Rough seas.

    South of Hong Kong and Shangchuan Dao:
    North to northeast force 6 to 7.
    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 north force 5
      Visibility 22 Kilometres

    Shantou Wind east force 1
      Visibility 23 Kilometres

    Huangmaozhou Wind north-northeast force 3

    Macau Wind north-northeast force 4
      Visibility 12 Kilometres

    Xisha Wind north-northeast force 4
      Visibility 13 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 12:30 HKT 07/NOV/2019
    (Next update at 17:30 HKT 07/NOV/2019)
    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 NOON, NAKRI WAS LOCATED AT 13.5 DEGREES
     NORTH, 117.3 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 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  020/10-15
       OFFSHORE:  020/15-20 OCNL 25                    28-23
   B.   2000 FT:  020/15-20                            17
   C.   5000 FT:  020/15                               12
   D.  10000 FT:  290/15                               9
   E.  18000 FT:  310/20                               MS5
   F.  24000 FT:  260/30                               MS11
   G.  30000 FT:  250/30                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 4000 FT
   K. VISIBILITY    : 8 KM.
   L. 0 DEG. C LEVEL: 15000 FT      10 DEG. C LEVEL(S) : 9800 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE. MOD NEAR HILLS.
   N. SEA STATE     : 2.0-3.5 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
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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 12:30 HKT 07/Nov/2019


    Tropical Cyclone Warning

    At 070300 UTC, Severe Tropical Storm Nakri (1924) with central pressure 984 hectopascals was centred within 90 nautical miles of one three point five degrees north (13.5 N) one one seven point three degrees east (117.3 E) and is forecast to be slow moving for the next 24 hours.

    Maximum winds near the centre are estimated to be 50 knots.

    Radius of over 33 knot winds 150 nautical miles.
    Radius of over 47 knot winds 60 nautical miles.
    Radius of over 2 metre waves 300 nautical miles.

    Forecast position and intensity at 080300 UTC
    One three point three degrees north (13.3 N)
    One one six point six degrees east (116.6 E)
    Maximum winds 60 knots.

    Forecast position and intensity at 090300 UTC
    One three point zero degrees north (13.0 N)
    One one three point eight degrees east (113.8 E)
    Maximum winds 65 knots.

    Forecast position and intensity at 100300 UTC
    One three point five degrees north (13.5 N)
    One one zero point seven degrees east (110.7 E)
    Maximum winds 60 knots.

    Forecast position and intensity at 110300 UTC
    One four point one degrees north (14.1 N)
    One zero seven point six degrees east (107.6 E)
    Maximum winds 30 knots.

    Forecast position and intensity at 120300 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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