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Bulletin issued at 06:02 HKT 31/Oct/2018

At 6 a.m. at the Hong Kong Observatory the air temperature was 23 degrees Celsius and the relative humidity 40 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 23 degrees;
Wong Chuk Hang 24 degrees;
Ta Kwu Ling 21 degrees;
Lau Fau Shan 21 degrees;
Tai Po 21 degrees;
Sha Tin 23 degrees;
Tuen Mun 22 degrees;
Tseung Kwan O 21 degrees;
Sai Kung 23 degrees;
Cheung Chau 20 degrees;
Chek Lap Kok 23 degrees;
Tsing Yi 24 degrees;
Shek Kong 21 degrees;
Tsuen Wan Ho Koon 22 degrees;
Tsuen Wan Shing Mun Valley 23 degrees;
Hong Kong Park 23 degrees;
Shau Kei Wan 23 degrees;
Kowloon City 22 degrees;
Happy Valley 24 degrees;
Wong Tai Sin 23 degrees;
Stanley 23 degrees;
Kwun Tong 23 degrees;
Sham Shui Po 22 degrees;
Kai Tak Runway Park 23 degrees;
Yuen Long Park 21 degrees;
Tai Mei Tuk 22 degrees.

Here is the information on Severe Tropical Storm Yutu at 6 a.m.:
Location: 17.1 degrees north, 118.2 degrees east.


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


Climatological Information for 31 Oct

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 05:45 HKT 31/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.

At 6 a.m., Severe Tropical Storm Yutu was centred about 430 kilometres south-southeast of Dongsha Dao. It is forecast to move northwest at about 15 kilometres per hour across the northern part of the South China Sea.

Weather forecast for today

Very dry with sunny periods. The maximum temperature will be around 28 degrees. Moderate to fresh northerly winds, occasionally strong offshore and on high ground.

Outlook : Windy in the next couple of days. Sunny periods over the weekend and early next week.


(The above forecast period is valid up to 23:59 HKT today, 31/10/2018; 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 21:00 HKT 30/Oct/2018

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

GENERAL SITUATION AT 300900 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS. FOR DETAILS ON TYPHOON YUTU (1826), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 301300 UTC:

HONG KONG= N TO NE 5-6, OCNL 7. FINE. SEA UP TO 4 M. SWELL NE 2-3 M, SE 2-3 M. TEMP 23-28 C. =
KWANGTUNG= N TO NE 6-7, 8 IN E. FINE. SEA 3-4 M, 6 M IN E. SWELL NE 3 M, SE 3 M. =
TAIWAN STRAIT= NE 8-9. FINE. SEA 6-8 M. SWELL NE 3 M, SE 3 M. =
BASHI= E TO NE 8-9, OCNL 10. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 10 M. SWELL E TO NE 5-7 M, S TO SE 5-7 M. =
PRATAS= N TO NE 10-11, CYCLONIC UP TO 12 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 10-12 M, UP TO 14 M LATER. SWELL E TO NE 3-5 M, SE 3-5 M. =
BALINTANG= E TO NE 10-11. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 10-12 M. SWELL E TO NE 5-7 M, S TO SE 5-7 M. =
SCARBOROUGH= CYCLONIC 11-12. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 12-14 M. SWELL NE 5-7 M. =
PARACEL= N TO NE 6-7, BEC 8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, BEC 6 M. SWELL E TO NE 3-5 M. =
TONKIN= N TO NE 5-6. FINE. SEA 2-3 M. SWELL NE UP TO 2 M. =
DANANG= N TO NE 5-6, OCNL 7. FINE. SEA UP TO 4 M. SWELL E TO 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 05:30 HKT 31/Oct/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 31 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 5 a.m., Severe Tropical Storm Yutu with maximum sustained winds of about 110 kilometres per hour near its centre was located near 17.0 degrees north, 118.3 degrees east. It is forecast to move northwest or west-northwest at about 15 kilometres per hour across the northern part of the South China Sea.

    Area forecasts for the next 24 hours

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

    Nan'ao and Shanwei:
    North to northeast force 7 to 8.
    Frequent heavy squally showers and thunderstorms.
    Very rough seas.

    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, becoming cyclonic winds of force 10 in east. Frequent heavy squally showers and thunderstorms in east.

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

    Waglan Island Wind north force 6

    Shantou Wind south-southwest force 1
      Visibility 20 Kilometres

    Dongsha Wind north-northeast force 5
      Visibility 10 Kilometres

    Huangmaozhou Wind north-northeast force 5

    Macau Wind north force 4
      Visibility 24 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 04:00 HKT 31/OCT/2018
    (Next update at 9:00-9:30 HKT 31/OCT/2018)
    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 COASTAL
     AREAS OF GUANGDONG.
     TYPHOON YUTU HAS WEAKENED INTO A SEVERE TROPICAL
     STORM. AT 3 A.M., YUTU WAS CENTRED NEAR 16.9
     DEGREES NORTH, 118.6 DEGREES EAST. IT IS
     FORECAST TO MOVE NORTHWEST OR WEST-NORTHWEST AT
     ABOUT 8 KNOTS ACROSS THE NORTHERN PART OF THE
     SOUTH CHINA SEA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0400 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  360/15
       OFFSHORE:  360/20-25, OCNL 30 LATER             23-27
   B.   2000 FT:  010/25-30, OCNL 35                   21
   C.   5000 FT:  040/20                               17
   D.  10000 FT:  080/15                               7
   E.  18000 FT:  280/10                               MS4
   F.  24000 FT:  330/10                               MS15
   G.  30000 FT:  240/10                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      NO CLOUDS OF HEIGHT AT OR BELOW 10000 FT
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 9200 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND NEAR HILLS
   N. SEA STATE     : 2.5-4.0 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     FRESH NORTHERLY WINDS, STRONG OFFSHORE AND ON
     HIGH GROUND. SUNNY PERIODS.=

    ===================================================================
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.

    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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    Severe Weather Information Centre

    Bulletin issued at 06:30 HKT 31/Oct/2018


    Tropical Cyclone Warning

    At 302100 UTC, Severe Tropical Storm Yutu (1826) with central pressure 975 hectopascals was centred within 60 nautical miles of one seven point one degrees north (17.1 N) one one eight point four degrees east (118.4 E) and is forecast to move northwest at about 6 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 60 knots.

    Radius of over 33 knot winds 210 nautical miles over northwest quadrant, 180 nautical miles elsewhere.
    Radius of over 47 knot winds 60 nautical miles.
    Radius of over 2 metre waves 240 nautical miles.

    Forecast position and intensity at 312100 UTC
    One nine point three degrees north (19.3 N)
    One one six point six degrees east (116.6 E)
    Maximum winds 65 knots.

    Forecast position and intensity at 012100 UTC
    Two one point four degrees north (21.4 N)
    One one six point eight degrees east (116.8 E)
    Maximum winds 60 knots.

    Forecast position and intensity at 022100 UTC
    Two two point two degrees north (22.2 N)
    One one seven point seven degrees east (117.7 E)
    Maximum winds 35 knots.

    Forecast position and intensity at 032100 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 31/Oct/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     28.5 C
Minimum Air Temperature                     23.4 C
Grass Minimum Temperature                   18.0 C
Relative Humidity                        26 - 39 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2077.6 mm
Against an average of                     2333.5 mm

Other Stations                Min                  Max
King's Park                  23.0 C               28.0 C
Wong Chuk Hang               22.7 C               29.5 C
Ta Kwu Ling                  18.7 C               29.1 C
Lau Fau Shan                 18.5 C               28.0 C
Tai Po                       21.2 C               27.0 C
Sha Tin                      23.0 C               28.4 C
Tuen Mun                     19.2 C               29.3 C
Tseung Kwan O                21.0 C               29.3 C
Sai Kung                     22.8 C               27.5 C
Cheung Chau                  20.1 C               30.1 C
Chek Lap Kok                 22.8 C               30.4 C
Tsing Yi                     21.5 C               29.2 C
Shek Kong                    18.4 C               29.8 C
Tsuen Wan Ho Koon            20.5 C               27.3 C
Tsuen Wan Shing Mun Valley   19.5 C               29.7 C
Hong Kong Park               23.1 C               30.1 C
Shau Kei Wan                 23.0 C               29.2 C
Kowloon City                 22.8 C               28.7 C
Happy Valley                 22.6 C               30.4 C
Wong Tai Sin                 23.2 C               29.6 C
Stanley                      23.5 C               29.3 C
Kwun Tong                    23.2 C               28.3 C
Sham Shui Po                 20.4 C               30.5 C
Kai Tak Runway Park          23.4 C               28.4 C
Yuen Long Park               18.5 C               29.7 C
Tai Mei Tuk               22.4 C               28.8 C

Duration of sunshine (King's Park):              10.5 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 (30 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 30 Oct
     2003copy right image | Important notices | Privacy policy Last revision date: <31 Oct 2018> 

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