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Bulletin issued at 06:02 HKT 03/Nov/2018

At 6 a.m. at the Hong Kong Observatory the air temperature was 20 degrees Celsius and the relative humidity 95 per cent.

The air temperatures at other places were:

King's Park 19 degrees;
Wong Chuk Hang 20 degrees;
Ta Kwu Ling 19 degrees;
Lau Fau Shan 19 degrees;
Tai Po 18 degrees;
Sha Tin 18 degrees;
Tuen Mun 20 degrees;
Tseung Kwan O 19 degrees;
Sai Kung 19 degrees;
Cheung Chau 19 degrees;
Chek Lap Kok 20 degrees;
Tsing Yi 19 degrees;
Shek Kong 19 degrees;
Tsuen Wan Ho Koon 18 degrees;
Tsuen Wan Shing Mun Valley 19 degrees;
Hong Kong Park 19 degrees;
Shau Kei Wan 19 degrees;
Kowloon City 19 degrees;
Happy Valley 20 degrees;
Wong Tai Sin 19 degrees;
Stanley 20 degrees;
Kwun Tong 19 degrees;
Kai Tak Runway Park 19 degrees;
Yuen Long Park 18 degrees;
Tai Mei Tuk 18 degrees.

Between 4:45 and 5:45 a.m., the rainfall recorded in various regions were:

Kwai Tsing 0 to 1 mm;
Sha Tin 0 to 1 mm;
Kowloon City 0 to 1 mm;
Tai Po 0 to 1 mm;
Sham Shui Po 1 mm;
Tsuen Wan 0 to 1 mm;
Wong Tai Sin 0 to 1 mm.

Here is the information on Tropical Depression Yutu at 5 a.m.:
Location: 20.4 degrees north, 115.9 degrees east.


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


Climatological Information for 3 Nov

Regional Weather in Hong Kong

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Bulletin updated at 06:15 HKT 03/Nov/2018

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

The northeast monsoon is bringing slightly cooler weather to the coast of Guangdong.

Besides, Tropical Depression Yutu has weakened into an area of low pressure over the northeastern part of the South China Sea.

Weather forecast for today

Mainly cloudy. Slightly cooler with one or two rain patches in the morning. The maximum temperature will be around 24 degrees during the day. Moderate north to northeasterly winds.

Outlook : Sunny periods in the next few days.


(The above forecast period is valid up to 23:59 HKT today, 03/11/2018; 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 21:00 HKT 02/Nov/2018

STORM WARNING AREA: TAIWAN STRAIT.
GALE WARNING AREAS: KWANGTUNG, BASHI AND PRATAS.

GENERAL SITUATION AT 020900 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS. FOR DETAILS ON TROPICAL DEPRESSION YUTU (1826), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 021300 UTC:

HONG KONG= N TO NE 5-6, OCNL 7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL NE 2-3 M, S TO SW 2-3 M. TEMP 21-26 C. =
KWANGTUNG= N TO NE 6-7, 8-9 IN E. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, 6-8 M IN E. SWELL NE 3-5 M, S TO SW 3-5 M. =
TAIWAN STRAIT= NE 8-9, OCNL 10. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 10 M. SWELL NE 5 M, SW 3-5 M. =
BASHI= E TO NE 6-7, OCNL 8. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL NE 3-5 M, SW 3-5 M. =
PRATAS= CYCLONIC 8-9, NE 7-8 LATER. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA 4-8 M. SWELL NE 3-5 M, SW 3-5 M. =
BALINTANG= E TO SE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 3-5 M, SW 3-5 M. =
SCARBOROUGH= N TO NW 6-7. LGT RAIN PATCHES. SEA 3-4 M. SWELL NE 3-5 M, SW 3-5 M. =
PARACEL= N TO NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 3-5 M, S TO SW 3 M. =
TONKIN= N TO NE 5-6. FINE. SEA 2-3 M. SWELL NE 2 M. =
DANANG= N TO NE 5-6. LGT RAIN PATCHES. SEA 2-3 M. SWELL NE 2-3 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 06:25 HKT 03/Nov/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 6:25 a.m. on 03 November 2018

    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.

    Besides, Tropical Depression Yutu has weakened into an area of low pressure over the northeastern part of the South China Sea.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North to northeast force 5 to 6.
    A few rain patches.
    Moderate to rough seas.

    Nan'ao:
    Northeast force 8 to 9, force 7 to 8 later.
    Isolated squally showers and thunderstorms.
    Very rough to high seas.

    Shanwei:
    Northeast force 6 to 7.
    Isolated squally showers and thunderstorms.
    Rough seas.

    South of Hong Kong:
    North to northeast force 6 to 7.
    Rough seas.

    Shangchuan Dao:
    North to northeast force 5 to 6.
    Moderate to rough seas.

    Outlook for the next 48 hours
    Northeasterly winds of force 5 to 6, occasionally force 7.

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

    Waglan Island Wind north force 3

    Shantou Wind west-northwest force 1
      Visibility 23 Kilometres

    Huangmaozhou Wind north-northeast force 3

    Macau Wind north force 3
      Visibility 7 Kilometres

    Xisha Wind east-northeast force 2
      Visibility 21 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 01:30 HKT 03/NOV/2018
    (Next update at 9:00-9:30 HKT 03/NOV/2018)
    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 11 P.M. LAST NIGHT, TROPICAL DEPRESSION YUTU
     WAS CENTRED NEAR 20.7 DEGREES NORTH, 116.1
     DEGREES EAST. IT IS FORECAST TO MOVE SLOWLY,
     LINGER OVER THE NORTHEASTERN PART OF THE SOUTH
     CHINA SEA AND DISSIPATE GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  020/10
       OFFSHORE:  360/10-15                            19-24
   B.   2000 FT:  070/15-20                            16
   C.   5000 FT:  050/10                               15
   D.  10000 FT:  280/10                               10
   E.  18000 FT:  230/30                               MS4
   F.  24000 FT:  250/30                               MS16
   G.  30000 FT:  230/45                               MS30
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      CLOUDY WITH A FEW LIGHT RAIN PATCHES. SUNNY
      INTERVALS DURING THE DAY. LOCALISED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT SCT 3500 FT BKN 8000 FT
   K. VISIBILITY    : 8 KM. TEMPO 4000 M IN RAIN/MIST.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 8400, 10000 FT
   M. TURBULENCE    : OCNL MOD OFFSHORE AND NEAR HILLS AT FIRST
   N. SEA STATE     : 1.5-2.5 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE NORTHEASTERLY WINDS. MAINLY
     CLOUDY.=

    ===================================================================
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 09:45 HKT on 02 Nov 18

    VHHK SIGMET 1 VALID 020140/020600 VHHH- VHHK HONG KONG FIR TC YUTU PSN N2048 E11636 CB OBS AT 00Z WI 120NM OF TC CENTRE TOP FL400 WKN FCST AT 0600Z TC CENTRE PSN N2054 E11636= VHHK SIGMET 3 VALID 020150/020600 VHHH- VHHK HONG KONG FIR TC YUTU PSN N2048 E11636 CB OBS AT 0000Z WI 120NM OF TC CENTRE TOP FL400 WKN FCST AT 0600Z TC CENTRE PSN N2054 E11636=

    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

    Tropical Cyclone Warning |  Track and Positions of Tropical Cyclones
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    Bulletin issued at 06:30 HKT 03/Nov/2018


    Tropical Cyclone Warning

    At 022100 UTC, Tropical Depression Yutu (1826) has weakened into an area of low pressure.

    No further warnings on this area of low pressure will be issued by the Hong Kong Observatory unless re-intensification takes place.



    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 03/Nov/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     24.8 C
Minimum Air Temperature                     20.1 C
Grass Minimum Temperature                   20.3 C
Relative Humidity                        63 - 87 Percent
Rainfall                                     0.1 mm 
Total rainfall since 1st January          2077.7 mm
Against an average of                     2336.6 mm

Other Stations                Min                  Max
King's Park                  19.0 C               24.3 C
Wong Chuk Hang               20.5 C               25.4 C
Ta Kwu Ling                  19.8 C               23.2 C
Lau Fau Shan                 18.6 C               21.5 C
Tai Po                       18.2 C               22.2 C
Sha Tin                      19.5 C               23.4 C
Tuen Mun                     20.1 C               22.4 C
Tseung Kwan O                18.9 C               26.4 C
Sai Kung                     19.6 C               23.3 C
Cheung Chau                  20.1 C               24.3 C
Chek Lap Kok                 20.0 C               23.0 C
Tsing Yi                     19.9 C               24.6 C
Shek Kong                    20.2 C               23.1 C
Tsuen Wan Ho Koon            19.2 C               22.4 C
Tsuen Wan Shing Mun Valley   20.4 C               25.3 C
Hong Kong Park               20.3 C               24.3 C
Shau Kei Wan                 19.1 C               24.9 C
Kowloon City                 18.6 C               23.9 C
Happy Valley                 20.1 C               26.2 C
Wong Tai Sin                 19.6 C               24.3 C
Stanley                      20.1 C               26.3 C
Kwun Tong                    19.2 C               25.1 C
Sham Shui Po                 19.4 C               26.5 C
Kai Tak Runway Park          19.0 C               25.0 C
Yuen Long Park               19.4 C               23.1 C
Tai Mei Tuk               19.9 C               24.3 C

Duration of sunshine (King's Park):              1.7 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 6.
 

Yesterday's (02 Nov 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                        0.15

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 02 Nov
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