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Bulletin issued at 10:02 HKT 29/Oct/2019

At 10 a.m. at the Hong Kong Observatory the air temperature was 23 degrees Celsius and the relative humidity 62 per cent.
During the past hour the mean UV Index recorded at King's Park was 3. The intensity of UV radiation was moderate.

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 23 degrees;
Wong Chuk Hang 23 degrees;
Ta Kwu Ling 22 degrees;
Lau Fau Shan 21 degrees;
Tai Po 22 degrees;
Sha Tin 23 degrees;
Tuen Mun 23 degrees;
Tseung Kwan O 24 degrees;
Sai Kung 22 degrees;
Cheung Chau 23 degrees;
Chek Lap Kok 23 degrees;
Tsing Yi 22 degrees;
Shek Kong 22 degrees;
Tsuen Wan Ho Koon 21 degrees;
Tsuen Wan Shing Mun Valley 25 degrees;
Hong Kong Park 23 degrees;
Shau Kei Wan 23 degrees;
Kowloon City 23 degrees;
Happy Valley 23 degrees;
Wong Tai Sin 23 degrees;
Stanley 23 degrees;
Kwun Tong 23 degrees;
Sham Shui Po 23 degrees;
Kai Tak Runway Park 23 degrees;
Yuen Long Park 24 degrees;
Tai Mei Tuk 25 degrees.

Here is the information on Tropical Depression at 10 a.m.:
Location: 11.6 degrees north, 115.8 degrees east.


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


Climatological Information for 29 Oct

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 09:45 HKT 29/Oct/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.

The area of low pressure over the southern part of the South China Sea has intensified into a tropical depression. At 10 a.m., the tropical depression was centred about 200 kilometres northeast of Nansha. It is forecast to move west-northwest at about 18 kilometres per hour in the general direction of the southern part of Vietnam.

Weather forecast for today

It will be fine. Very dry during the day. Moderate to fresh northerly winds.

Outlook : Dry and slightly cooler with sunny periods in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 29/10/2019; 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 29/Oct/2019

N0 WARNING.

GENERAL SITUATION AT 282100 UTC:
LOW 1006 HPA 11N 116E W 10 KT INTSF

MARINE FORECAST FOR 24 HOURS FROM 290100 UTC:

HONG KONG= N TO NE 5-6. FINE. SEA 2-3 M. TEMP 27-21 C. =
KWANGTUNG= N TO NE 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL NE 2 M. =
TAIWAN STRAIT= NE 6-7. FINE. SEA 3-4 M. SWELL NE 2 M. =
BASHI= NE 5-6, OCNL 7. ISOL SHOWERS AND TS. SEA UP TO 4 M. SWELL NE 2 M. =
PRATAS= NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 2 M. =
BALINTANG= E TO NE 5-6, OCNL 7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL NE 2 M. =
SCARBOROUGH= E TO NE 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL NE 2 M. =
PARACEL= NE 6-7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 2 M. =
TONKIN= N TO NE 5-6. ISOL SHOWERS. SEA 2-3 M. =
DANANG= N TO NE 5-6, BEC 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M, BEC 4 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 09:30 HKT 29/Oct/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 29 October 2019

    Warnings:
    Strong winds in all areas.

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

    The area of low pressure over the southern part of the South China Sea has intensified into a tropical depression. At 9 a.m., the tropical depression with maximum sustained winds of about 45 kilometres per hour near its centre was located at 11.5 degrees north, 115.9 degrees east. It is forecast to move west-northwest at about 18 kilometres per hour in the general direction of the southern part of Vietnam.

    Area forecasts for the next 24 hours

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

    Nan'ao and Shanwei:
    Northeast force 6 to 7.
    Moderate to rough seas.

    South of Hong Kong and Shangchuan Dao:
    North to northeast force 5 to 6, becoming force 7.
    Moderate to rough seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 6 to 7.

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

    Waglan Island Wind north force 5
      Visibility 50 Kilometres or above

    Shantou Wind west-southwest force 2
      Visibility 30 Kilometres

    Dongsha Wind north-northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind north-northeast force 4

    Macau Wind north force 4
      Visibility 18 Kilometres

    Xisha Wind northeast force 3
      Visibility 15 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 09:30 HKT 29/OCT/2019
    (Next update at 12:30 HKT 29/OCT/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.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  020/10-15
       OFFSHORE:  030/15-20                            21-27
   B.   2000 FT:  040/15-20, OCNL 25                   17
   C.   5000 FT:  050/15                               15
   D.  10000 FT:  310/15                               10
   E.  18000 FT:  280/25                               MS3
   F.  24000 FT:  280/35                               MS13
   G.  30000 FT:  230/35                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2400-3600 FT.
   I. WEATHER       : 
      FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT.
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD TO SEV NEAR HILLS. MOD OFFSHORE.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 26 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE NORTH TO NORTHEASTERLY WINDS, FRESH
     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)

    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 09:30 HKT 29/Oct/2019


    Tropical Cyclone Warning

    An area of low pressure over the southern part of South China Sea has intensified into a Tropical Depression with central pressure 1002 hectopascals. At 290000 UTC, it was centred within 90 nautical miles of one one point four degrees north (11.4 N) one one six point zero degrees east (116.0 E) and is forecast to move west-northwest at about 10 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 25 knots.

    Radius of over 2 metre waves 120 nautical miles over northern semicircle, 60 nautical miles elsewhere.

    Forecast position and intensity at 300000 UTC
    One two point eight degrees north (12.8 N)
    One one one point eight degrees east (111.8 E)
    Maximum winds 35 knots.

    Forecast position and intensity at 310000 UTC
    One three point one degrees north (13.1 N)
    One zero seven point six degrees east (107.6 E)
    Maximum winds 30 knots.

    Forecast position and intensity at 010000 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 29/Oct/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     29.0 C
Minimum Air Temperature                     22.4 C
Grass Minimum Temperature                   22.8 C
Relative Humidity                        65 - 85 Percent
Rainfall                                      Trace 
Total rainfall since 1st January          2382.7 mm
Against an average of                     2330.5 mm

Other Stations                Min                  Max
King's Park                  21.5 C               29.3 C
Wong Chuk Hang               22.1 C               27.5 C
Ta Kwu Ling                  20.6 C               28.5 C
Lau Fau Shan                 21.0 C               27.7 C
Tai Po                       21.0 C               27.6 C
Sha Tin                      21.4 C               27.5 C
Tuen Mun                     21.9 C               28.5 C
Sai Kung                     21.7 C               27.8 C
Cheung Chau                  21.0 C               29.7 C
Chek Lap Kok                 22.0 C               28.4 C
Tsing Yi                     22.0 C               28.6 C
Shek Kong                    21.2 C               29.1 C
Tsuen Wan Ho Koon            20.2 C               26.9 C
Tsuen Wan Shing Mun Valley   21.0 C               29.0 C
Hong Kong Park               22.1 C               28.0 C
Shau Kei Wan                 21.3 C               27.6 C
Kowloon City                 20.9 C               28.8 C
Happy Valley                 22.2 C               27.7 C
Wong Tai Sin                 21.3 C               28.1 C
Stanley                      22.0 C               27.9 C
Kwun Tong                    20.9 C               28.4 C
Sham Shui Po                 21.7 C               29.9 C
Kai Tak Runway Park          21.9 C               28.0 C
Yuen Long Park               21.5 C               29.8 C
Tai Mei Tuk               20.9 C               30.4 C

Duration of sunshine (King's Park):              3.2 H
The mean UV index recorded at King's Park yesterday was 1,
the UV intensity was Low.
The maximum UV index for yesterday was 6.
 

Yesterday's (28 Oct 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                          0.10
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 28 Oct
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