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Bulletin issued at 19:02 HKT 29/Oct/2018

At 7 p.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 35 per cent.

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 26 degrees;
Wong Chuk Hang 22 degrees;
Ta Kwu Ling 21 degrees;
Lau Fau Shan 25 degrees;
Tai Po 23 degrees;
Sha Tin 22 degrees;
Tuen Mun 23 degrees;
Tseung Kwan O 21 degrees;
Sai Kung 24 degrees;
Cheung Chau 21 degrees;
Chek Lap Kok 27 degrees;
Tsing Yi 23 degrees;
Shek Kong 22 degrees;
Tsuen Wan Ho Koon 22 degrees;
Tsuen Wan Shing Mun Valley 21 degrees;
Hong Kong Park 26 degrees;
Shau Kei Wan 26 degrees;
Kowloon City 26 degrees;
Happy Valley 24 degrees;
Wong Tai Sin 24 degrees;
Stanley 23 degrees;
Kwun Tong 25 degrees;
Sham Shui Po 23 degrees;
Kai Tak Runway Park 27 degrees;
Yuen Long Park 23 degrees;
Tai Mei Tuk 26 degrees.

Here is the information on Severe Typhoon Yutu at 7 p.m.:
Location: 16.8 degrees north, 124.4 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

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Hong Kong Climatology


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Bulletin updated at 18:45 HKT 29/Oct/2018

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

A dry northeast monsoon is affecting the coastal areas of Guangdong. Locally, the relative humidity in many places stayed at 30 per cent or below in the afternoon.

At 4 p.m., Severe Typhoon Yutu was centred about 490 kilometres east-northeast of Manila. It is forecast to move west at about 18 kilometres per hour towards Luzon.

Weather forecast for tonight and tomorrow

It will be fine. Relatively cool in the morning and at night. The minimum temperature will be about 21 degrees in the urban areas, and appreciably lower in the New Territories. Very dry during the day tomorrow with a maximum temperature of around 28 degrees. Moderate northeasterly winds, fresh offshore and on high ground.

Outlook : Relatively cool in the morning and at night and very dry during the day on Wednesday. Windy in the middle to latter parts of this week.


(The above forecast period is valid up to 23:59 HKT tomorrow, 30/10/2018; 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/2018

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

GENERAL SITUATION AT 282100 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS. SEVERE TYPHOON YUTU (1826) 935 HPA 17N 127E WSW 10 KT INTST NC.

MARINE FORECAST FOR 24 HOURS FROM 290100 UTC:

HONG KONG= N TO NE 5-6. FINE. SEA 2-3 M. SWELL E TO NE 2-3 M, SE 2-3 M. TEMP 28-20 C. =
KWANGTUNG= N TO NE 6-7, OCNL 8 IN E. FINE. SEA 3-4 M, UP TO 6 M IN E. SWELL E TO NE 2-3 M, SE 2-3 M. =
TAIWAN STRAIT= N TO NE 7-8, OCNL 9. FINE. SEA UP TO 8 M. SWELL E TO NE 3 M, SE 3 M. =
BASHI= N TO NE 7-8, BEC E 8-9. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M, BEC 6-8 M. SWELL E TO NE 5-7 M, S TO SE 3-5 M. =
PRATAS= N TO NE 6-7, OCNL 8. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS LATER. SEA UP TO 6 M. SWELL E TO NE 3-5 M. =
BALINTANG= N TO NE 9-10, BEC E 10-11. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 8-10 M, BEC 10-12 M. SWELL E TO NE 5-7 M, S TO SE 3-5 M. =
SCARBOROUGH= N TO NE 7-8, 9-10 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M, 8-10 M LATER. SWELL E TO NE 3-5 M. =
PARACEL= N TO NE 6-7, UP TO 8 LATER. FINE. SEA UP TO 6 M. SWELL E TO NE 3 M. =
TONKIN= NE 4-5, OCNL 6. ISOL SHOWERS. SEA UP TO 3 M. =
DANANG= N TO NE 5-6, OCNL 7. ISOL SHOWERS. SEA UP TO 4 M. SWELL E TO 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 19:30 HKT 29/Oct/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 7:30 p.m. on 29 October 2018

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

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

    At 7 p.m., Severe Typhoon Yutu with maximum sustained winds of about 165 kilometres per hour near its centre was located at 16.8 degrees north, 124.4 degrees east. It is forecast to move west at about 20 kilometres per hour towards Luzon.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North to northeast force 5 to 6, occasionally force 7.
    Rough seas.

    Nan'ao, Shanwei and South of Hong Kong:
    North to northeast force 6 to 7, occasionally force 8.
    Rough to very rough seas.

    Shangchuan Dao:
    North to northeast force 5 to 6, occasionally force 7.
    Rough seas.

    Outlook for the next 48 hours
    North to northeasterly winds of force 7 to 8, up to force 10 in east. Frequent heavy squally showers and thunderstorms in east.

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

    Waglan Island Wind west-northwest force 2
      Visibility 33 Kilometres

    Shantou Wind east-southeast force 2
      Visibility 30 Kilometres

    Dongsha Wind north-northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 1

    Macau Wind north force 3
      Visibility 26 Kilometres

    Xisha Wind north-northeast force 3
      Visibility 26 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 17:30 HKT 29/OCT/2018
    (Next update at 01:30 HKT 30/OCT/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB ON HIGH GROUND.
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 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  360/10
       OFFSHORE:  360/15-20                            28-21
   B.   2000 FT:  030/20-25, OCNL 30 LATER             20
   C.   5000 FT:  040/20-25                            17
   D.  10000 FT:  050/15                               6
   E.  18000 FT:  270/10                               MS2
   F.  24000 FT:  280/15                               MS13
   G.  30000 FT:  260/15                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      NO CLOUDS OF HEIGHT AT OR BELOW 10000 FT
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 8000 FT
   M. TURBULENCE    : MOD OFFSHORE. MOD TO SEV NEAR HILLS
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 26 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE NORTH TO NORTHEASTERLY
     WINDS,OCCASIONALLY STRONG ON HIGH GROUND. 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 12:30 HKT on 20 Oct 18

    VHHK SIGMET 1 VALID 200040/200440 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1706 E11418 - N1642 E11400 - N1930 E11130 - N2042 E11130 - N2012 E11242 - N1706 E11418 TOP FL450 MOV WNW 10KT NC= VHHK SIGMET 2 VALID 200440/200840 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1718 E11430 - N1642 E11400 - N1930 E11130 - N2042 E11130 - N2024 E11300 - N1718 E11430 TOP FL480 MOV NW 05KT 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

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    Bulletin issued at 18:30 HKT 29/Oct/2018


    Tropical Cyclone Warning

    Severe Typhoon Yutu (1826) has entered the area of responsibility of the Hong Kong Observatory.

    At 290900 UTC, Severe Typhoon Yutu (1826) with central pressure 945 hectopascals was centred within 30 nautical miles of one six point eight degrees north (16.8 N) one two four point eight degrees east (124.8 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 90 knots.

    Radius of over 33 knot winds 180 nautical miles.
    Radius of over 47 knot winds 90 nautical miles.
    Radius of over 63 knot winds 45 nautical miles.
    Radius of over 2 metre waves 300 nautical miles.

    Forecast position and intensity at 300900 UTC
    One six point seven degrees north (16.7 N)
    One two zero point two degrees east (120.2 E)
    Maximum winds 70 knots.

    Forecast position and intensity at 310900 UTC
    One seven point nine degrees north (17.9 N)
    One one seven point four degrees east (117.4 E)
    Maximum winds 65 knots.

    Forecast position and intensity at 010900 UTC
    Two zero point zero degrees north (20.0 N)
    One one six point five degrees east (116.5 E)
    Maximum winds 50 knots.

    Forecast position and intensity at 020900 UTC
    Two one point three degrees north (21.3 N)
    One one six point nine degrees east (116.9 E)
    Maximum winds 40 knots.

    Forecast position and intensity at 030900 UTC
    Two three point four degrees north (23.4 N)
    One one eight point eight degrees east (118.8 E)
    Maximum winds 30 knots.



    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/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     27.5 C
Minimum Air Temperature                     21.7 C
Grass Minimum Temperature                   18.6 C
Relative Humidity                        43 - 77 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2077.6 mm
Against an average of                     2330.5 mm

Other Stations                Min                  Max
King's Park                  21.1 C               27.8 C
Wong Chuk Hang               18.4 C               27.6 C
Ta Kwu Ling                  15.2 C               28.9 C
Lau Fau Shan                 18.3 C               27.7 C
Tai Po                       17.6 C               25.9 C
Sha Tin                      18.0 C               27.8 C
Tuen Mun                     20.6 C               28.8 C
Tseung Kwan O                17.6 C               28.4 C
Sai Kung                     19.9 C               26.1 C
Cheung Chau                  19.2 C               29.3 C
Chek Lap Kok                 20.5 C               27.6 C
Tsing Yi                     19.3 C               28.2 C
Shek Kong                    17.6 C               29.9 C
Tsuen Wan Ho Koon            18.0 C               27.9 C
Tsuen Wan Shing Mun Valley   17.2 C               29.6 C
Hong Kong Park               20.8 C               28.2 C
Shau Kei Wan                 21.1 C               27.6 C
Kowloon City                 21.2 C               29.5 C
Happy Valley                 19.4 C               28.7 C
Wong Tai Sin                 20.9 C               29.0 C
Stanley                      20.1 C               27.4 C
Kwun Tong                    20.8 C               28.3 C
Sham Shui Po                 20.2 C               29.1 C
Kai Tak Runway Park          21.4 C               27.5 C
Yuen Long Park               17.8 C               29.4 C
Tai Mei Tuk               19.3 C               29.0 C

Duration of sunshine (King's Park):              10.6 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.
 

Yesterday's (28 Oct 2018) 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                               0.10
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.12
Sha Tau Kok                         0.10
Kwun Tong                           0.13
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 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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