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Bulletin issued at 05:02 HKT 02/Nov/2018

At 5 a.m. at the Hong Kong Observatory the air temperature was 22 degrees Celsius and the relative humidity 68 per cent.

Please be reminded that:

The Tropical Cyclone Signal No. 1 has been issued.

The air temperatures at other places were:

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

Here is the information on Tropical Storm Yutu:
Location: 20.8 degrees north, 116.8 degrees east; Maximum sustained wind near its centre: 65 km/h.


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


Climatological Information for 2 Nov

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 04:45 HKT 02/Nov/2018

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

Weather forecast for today

Mainly cloudy with one or two showers. Sunny intervals during the day. The maximum temperature will be about 26 degrees. Moderate to fresh northerly winds, occasionally strong on high ground. There will be swells.

Outlook : Sunny periods over the weekend and early next week.


(The above forecast period is valid up to 23:59 HKT today, 02/11/2018; 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 01/Nov/2018

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

GENERAL SITUATION AT 010900 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS. FOR DETAILS ON SEVERE TROPICAL STORM YUTU (1826), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 011300 UTC:

HONG KONG= N 6-7, OCNL 8. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL NE 2-3 M, SE 2-3 M. TEMP 22-26 C. =
KWANGTUNG= N TO NE 9-10, BEC 11 IN E. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 8-10 M, BEC 12 M IN E. SWELL NE 3-5 M, SE 3-5 M. =
TAIWAN STRAIT= NE 9-10. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA 8-10 M. SWELL NE 3-5 M. =
BASHI= E TO NE 9-10. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 8-10 M. SWELL NE 5-7 M. =
PRATAS= CYCLONIC 10-11. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 10-12 M. SWELL NE 5-7 M, SE 5-7 M. =
BALINTANG= SE 8-9, OCNL 10. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 10 M. SWELL NE 5-7 M. =
SCARBOROUGH= SW 6-7, OCNL 8. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL NE 5 M. =
PARACEL= N TO NW 8-9. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 6-8 M. SWELL NE 3-5 M. =
TONKIN= N 6-7. FINE. SEA 3-4 M. SWELL NE 2 M. =
DANANG= N 6-7. FINE. SEA 3-4 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 05:30 HKT 02/Nov/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 02 November 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 5 a.m., Tropical Storm Yutu with maximum sustained winds of about 65 kilometres per hour near its centre was located at 20.8 degrees north, 116.8 degrees east, it is forecast to move slowly and linger over the northeastern part of the South China Sea.

    Area forecasts for the next 24 hours

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

    Nan'ao:
    Northeast force 8 to 9.
    Frequent heavy squally showers and thunderstorms.
    Very rough to high seas.

    Shanwei:
    Cyclonic up to force 9.
    Frequent heavy squally showers and thunderstorms.
    Very rough to high seas.

    South of Hong Kong:
    North force 6 to 7, occasionally force 8 at first.
    A few showers.
    Rough to very rough seas.

    Shangchuan Dao:
    North force 6 to 7.
    Rough seas.

    Outlook for the next 48 hours
    North to northeasterly winds of force 6. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind north force 5

    Shantou Wind north-northwest force 1
      Visibility 20 Kilometres in rain

    Dongsha Wind north-northeast force 8
      Visibility 10 Kilometres

    Huangmaozhou Wind north force 4

    Macau Wind north force 3
      Visibility 15 Kilometres

    Xisha Wind northeast force 2
      Visibility 15 Kilometres

  • Explanation of Seas or Sea Waves
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  • Descriptive Terms of Wind Speeds
  • Visibility Readings in Hong Kong Waters
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 02/NOV/2018
    (Next update at 9:00-9:30 HKT 02/NOV/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     GALE FORCE WINDS. SEV TURB AND SEV GUSTS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
     AT 1 A.M., TROPICAL STORM YUTU WAS CENTRED NEAR
     20.6 DEGREES NORTH, 116.4 DEGREES EAST. IT IS
     FORECAST TO MOVE NORTH SLOWLY CROSSING THE
     NORTHEASTERN PART OF THE SOUTH CHINA SEA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  360/15-20
       OFFSHORE:  360/20-25, OCNL 35                   23-20
   B.   2000 FT:  030/25-30, OCNL 35G45                19
   C.   5000 FT:  090/35                               17
   D.  10000 FT:  060/15                               9
   E.  18000 FT:  050/10                               MS4
   F.  24000 FT:  300/25                               MS14
   G.  30000 FT:  190/10                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      4300- 4900 FT
   I. WEATHER       : 
      MAINLY CLOUDY.  ISOLATED SHOWERS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3500 FT SCT 4500 FT
   K. VISIBILITY    : 10 KM. TEMPO 4000 M IN SHOWERS.
   L. 0 DEG. C LEVEL: 15000 FT      10 DEG. C LEVEL(S) : 9400 FT
   M. TURBULENCE    : MOD TO SEV
   N. SEA STATE     : 3.0-4.5 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     FRESH TO STRONG NORTHERLY WINDS. MAINLY CLOUDY
     WITH ISOLATED SHOWERS.=

    ===================================================================
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 03:40 HKT on 02 Nov 18

    VHHK SIGMET 14 VALID 011640/012100 VHHH- VHHK HONG KONG FIR TC YUTU PSN N2036 E11624 CB OBS AT 1500Z WI 150NM OF TC CENTRE TOP FL450 WKN FCST AT 2100Z TC CENTRE PSN N2054 E11624= VHHK SIGMET 16 VALID 011940/020000 VHHH- VHHK HONG KONG FIR TC YUTU PSN N2042 E11642 CB OBS AT 1800Z WI 150NM OF TC CENTRE TOP FL450 WKN FCST AT 0000Z TC CENTRE PSN N2054 E11654=

    Please click here for more about the SIGMET

    TROPICAL CYCLONE WARNING Skip to main content
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    Tropical Cyclone Warnings

    Bulletin issued at 04:45 HKT 02/Nov/2018

    Tropical Cyclone Warning Bulletin

    Here is the latest Tropical Cyclone Warning Bulletin issued by the Hong Kong Observatory.

    The Standby Signal, No. 1 is in force.

    At 5 a.m., Tropical Storm Yutu was estimated to be about 320 kilometres east-southeast of Hong Kong (near 20.8 degrees north 116.8 degrees east) and is forecast to move slowly and linger over the northeastern part of the South China Sea.

    Yutu weakened further over the past few hours. When Yutu no longer poses a threat to Hong Kong, the Observatory will cancel all the Tropical Cyclone Warning Signals.

    As there are still swells, the Observatory advises the public to stay away from the shoreline and not to engage in water sports.

    (Precautionary Announcements with No. 1 Signal)

    1. Listen to radio, watch TV or browse the Hong Kong Observatory's website and mobile app for the latest information on the tropical cyclone.
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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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    Severe Weather Information Centre

    Bulletin issued at 03:30 HKT 02/Nov/2018


    Tropical Cyclone Warning

    At 011800 UTC, Tropical Storm Yutu (1826) with central pressure 990 hectopascals was centred within 60 nautical miles of two zero point seven degrees north (20.7 N) one one six point seven degrees east (116.7 E) and is forecast to be slow moving for the next 24 hours.

    Maximum winds near the centre are estimated to be 40 knots.

    Radius of over 33 knot winds 120 nautical miles over northeast quadrant, 90 nautical miles elsewhere.
    Radius of over 2 metre waves 150 nautical miles.

    Forecast position and intensity at 021800 UTC
    Two one point zero degrees north (21.0 N)
    One one six point nine degrees east (116.9 E)
    Maximum winds 25 knots.

    Forecast position and intensity at 030600 UTC
    Dissipated over sea.



    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 02/Nov/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     27.4 C
Minimum Air Temperature                     22.6 C
Grass Minimum Temperature                   19.6 C
Relative Humidity                        29 - 67 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2077.6 mm
Against an average of                     2334.6 mm

Other Stations                Min                  Max
King's Park                  21.7 C               27.0 C
Wong Chuk Hang               22.2 C               28.3 C
Ta Kwu Ling                  21.1 C               27.2 C
Lau Fau Shan                 20.8 C               27.0 C
Tai Po                       20.8 C               26.6 C
Sha Tin                      21.9 C               27.2 C
Tuen Mun                     22.0 C               27.6 C
Tseung Kwan O                21.8 C               28.4 C
Sai Kung                     21.7 C               25.7 C
Cheung Chau                  21.0 C               29.4 C
Chek Lap Kok                 21.9 C               28.6 C
Tsing Yi                     22.1 C               27.4 C
Shek Kong                    20.7 C               27.5 C
Tsuen Wan Ho Koon            20.2 C               25.6 C
Tsuen Wan Shing Mun Valley   21.8 C               28.1 C
Hong Kong Park               22.5 C               27.6 C
Shau Kei Wan                 22.0 C               28.8 C
Kowloon City                 21.2 C               26.7 C
Happy Valley                 22.7 C               28.8 C
Wong Tai Sin                 21.5 C               27.7 C
Stanley                      22.6 C               28.3 C
Kwun Tong                    21.8 C               27.7 C
Sham Shui Po                 22.0 C               28.8 C
Kai Tak Runway Park          22.1 C               28.2 C
Yuen Long Park               21.1 C               28.4 C
Tai Mei Tuk               19.3 C               27.4 C

Duration of sunshine (King's Park):              7.0 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 7.
 

Yesterday's (01 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                        0.14

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 01 Nov
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