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Bulletin issued at 22:02 HKT 18/Nov/2017

At 10 p.m. at the Hong Kong Observatory the air temperature was 21 degrees Celsius and the relative humidity 93 per cent.

Strong winds are expected from the northeast. The public should beware of the possible danger brought by rough seas.

Please be reminded that:

The Strong Monsoon Signal has been issued.

The air temperatures at other places were:

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

Between 8:45 and 9:45 p.m., the rainfall recorded in various regions were:

Southern District 0 to 2 mm;
Kowloon City 0 to 1 mm;
Eastern District 0 to 1 mm;
Wan Chai 1 mm;
Kwai Tsing 0 to 1 mm;
Central & Western District 0 to 1 mm;
Islands District 0 to 1 mm;
Sai Kung 0 to 1 mm;
Yau Tsim Mong 0 to 1 mm;
Sha Tin 0 to 1 mm;
Kwun Tong 0 to 1 mm.

Here is the information on Tropical Storm Kirogi at 8 p.m.:
Location: 11.5 degrees north, 111.8 degrees east.


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


Climatological Information for 18 Nov

Regional Weather in Hong Kong

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Bulletin updated at 21:45 HKT 18/Nov/2017

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

A strong northeast monsoon is affecting the coast of Guangdong.

At 8 p.m., Tropical Storm Kirogi was centred about 570 kilometres east of Ho Chi Minh City. It is forecast to move west or west-northwest at about 22 kilometres per hour in the general direction of the southern part of Vietnam.

Weather forecast for tonight and tomorrow

Cloudy with a few light rain patches. Becoming cool appreciably. Temperatures will range between 18 and 21 degrees tomorrow. Moderate to fresh northeasterly winds, strong offshore and on high ground.

Outlook : Cool in the morning and at night in the following few days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 19/11/2017; 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 18/Nov/2017

GALE WARNING AREAS: KWANGTUNG, TAIWAN STRAIT, BASHI, PRATAS, BALINTANG AND TONKIN.

GENERAL SITUATION AT 180900 UTC:
AN INTENSE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS. COLD FRONT 20N 112E 22N 119E S 20KT. FOR DETAILS ON TROPICAL STORM KIROGI (1725), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 181300 UTC:

HONG KONG= NE 6-7. RAIN PATCHES. SEA 3-4 M. SWELL NE UP TO 2 M. TEMP 18-21 C. =
KWANGTUNG= NE 7-8, 9 IN E. RAIN PATCHES. SEA 4-6 M, 8 M IN E. SWELL NE 2-3 M. =
TAIWAN STRAIT= N TO NE 8-9. RAIN PATCHES. SEA 6-8 M. SWELL NE 3-5 M. =
BASHI= NE 8-9. RAIN PATCHES. SEA 6-8 M. SWELL NE 3 M. =
PRATAS= NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 3 M. =
BALINTANG= NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 3 M. =
SCARBOROUGH= NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 2-3 M. =
PARACEL= NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 2-3 M. =
TONKIN= NE 6-7, 8 AT FIRST. ISOL SHOWERS AND TS. SEA 3-4 M, 6 M AT FIRST. SWELL NE UP TO 2 M. =
DANANG= NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 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 19:30 HKT 18/Nov/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 7:30 p.m. on 18 November 2017

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

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

    At 7 p.m., Tropical Storm Kirogi with maximum sustained winds of about 65 kilometres per hour near its centre was located near 11.5 degrees north, 112.1 degrees east. It is forecast to move west or west-northwest at about 22 kilometres per hour in the general direction of the southern part of Vietnam.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Northeast force 6 to 7.
    A few rain patches.
    Rough seas.

    Nan'ao:
    Northeast force 8 to 9.
    Very rough to high seas.

    Shanwei, South of Hong Kong and Shangchuan Dao:
    Northeast force 7 to 8.
    Rough to very rough seas.

    Outlook for the next 48 hours
    North to northeasterly winds of force 6 to 7, force 8 in east at first. Isolated showers and thunderstorms.

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

    Waglan Island Wind northeast force 6
      Visibility 9 Kilometres

    Shantou Wind east-northeast force 3
      Visibility 20 Kilometres in showers

    Dongsha Wind north-northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind north-northwest force 4

    Macau Wind north force 3
      Visibility 17 Kilometres

    Xisha Wind east-northeast force 2
      Visibility 26 Kilometres

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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 18/NOV/2017
    (Next update at 01:30 HKT 19/NOV/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN INTENSE NORTHEAST MONSOON ASSOCIATED WITH A
     COLD FRONT IS AFFECTING THE SOUTH CHINA COASTAL
     WATERS GRADUALLY.
     AT 4 P.M., TROPICAL STORM KIROGI WAS LOCATED
     NEAR 11.5 DEGREES NORTH, 112.8 DEGREES EAST. IT
     IS FORECAST TO MOVE WEST OR WEST-NORTHWEST AT
     ABOUT 12 KNOTS IN THE GENERAL DIRECTION OF THE
     SOUTHERN VIETNAM.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  350/10-15
       OFFSHORE:  360/15-20 OCNL 25                    25-20
   B.   2000 FT:  360/15-20
                  BEC 080/20-25, OCNL 30               20-15
   C.   5000 FT:  100/15                               15
   D.  10000 FT:  270/10                               10
   E.  18000 FT:  270/20                               MS5
   F.  24000 FT:  280/25                               MS15
   G.  30000 FT:  270/30                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      CLOUDY WITH A FEW LIGHT RAIN PATCHES.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT  SCT 5000 FT BKN 8000 FT
   K. VISIBILITY    : 8 KM. TEMPO 4000 M IN RAIN.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD TO SEV
   N. SEA STATE     : 2.0-3.0 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE NORTHEASTERLY WINDS, FRESH TO STRONG
     OFFSHORE. CLOUDY WITH A FEW LIGHT RAIN PATCHES.=

    ===================================================================
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 10:00 HKT on 15 Nov 17

    VHHK SIGMET Z99 VALID 150200/150210 VHHH- VHHK HONG KONG FIR THIS IS A TEST SIGMET, PLEASE DISREGARD=

    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 21:30 HKT 18/Nov/2017


    Tropical Cyclone Warning

    At 181200 UTC, Tropical Storm Kirogi (1725) with central pressure 995 hectopascals was centred within 90 nautical miles of one one point six degrees north (11.6 N) one one one point eight degrees east (111.8 E) and is forecast to move west or west-northwest at about 12 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 35 knots.

    Radius of over 33 knot winds 30 nautical miles.
    Radius of over 2 metre waves 90 nautical miles.

    Forecast position and intensity at 191200 UTC
    One one point eight degrees north (11.8 N)
    One zero seven point seven degrees east (107.7 E)
    Maximum winds 25 knots.

    Forecast position and intensity at 201200 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 18/Nov/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     26.2 C
Minimum Air Temperature                     22.9 C
Grass Minimum Temperature                   22.3 C
Relative Humidity                        74 - 88 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2568.9 mm
Against an average of                     2358.4 mm

Other Stations                Min                  Max
King's Park                  22.4 C               27.3 C
Wong Chuk Hang               22.4 C               27.9 C
Ta Kwu Ling                  21.0 C               28.8 C
Lau Fau Shan                 20.9 C               29.3 C
Tai Po                       21.5 C               25.8 C
Sha Tin                      22.1 C               29.0 C
Tuen Mun                     21.4 C               29.1 C
Tseung Kwan O                21.7 C               27.3 C
Cheung Chau                  21.7 C               26.8 C
Chek Lap Kok                 22.8 C               29.9 C
Tsing Yi                     22.4 C               29.9 C
Shek Kong                    20.7 C               31.1 C
Tsuen Wan Ho Koon            20.2 C               28.1 C
Tsuen Wan Shing Mun Valley   20.7 C               30.4 C
Hong Kong Park               22.4 C               27.7 C
Shau Kei Wan                 22.2 C               25.7 C
Kowloon City                 21.6 C               28.4 C
Happy Valley                 22.7 C               29.3 C
Wong Tai Sin                 21.7 C               28.6 C
Stanley                      22.3 C               26.7 C
Kwun Tong                    22.2 C               27.2 C
Sham Shui Po                 22.5 C               28.9 C
Kai Tak Runway Park          23.2 C               26.1 C
Yuen Long Park               20.7 C               29.9 C
Tai Mei Tuk               21.4 C               27.7 C

Duration of sunshine (King's Park):              9.8 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.
Sea surface temperature (Waglan Island):        23.8 C 

Yesterday's (17 Nov 2017) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 to
0.14 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                           0.08
Tap Mun                             0.09
Kat O                               0.09
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.12
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.09
King's Park                         0.14
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 during
the period 1987-2016, the background ambient gamma radiation
levels may vary between 0.06 and 0.30 microsievert per hour.

    2. The extent of health effects to a person as a result of
exposure to radiation is expressed by a physical quantity
called equivalent dose, in unit of sievert.  Protective
action may be required if there is an increase in the
ambient gamma dose rate above background such that the total
additional dose is expected to exceed 5000 microsieverts in
a relatively short period of time. For example, a dose of
5000 microsieverts may be reached when the ambient gamma
dose rate is 1000 microsieverts per hour (several thousand
times above background) and lasts for 5 hours.

    3. The readings of ambient gamma radiation level from
instrument are expressed in unit of gray, which is
numerically equal to the gamma dose expressed in sievert.
    Climatological Information for 17 Nov
     2003copy right image | Important notices | Privacy policy Last revision date: <18 Nov 2017> 

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