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Bulletin issued at 18:16 HKT 18/Oct/2016

At 6 p.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 97 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.0. The intensity of UV radiation was low.

Though rainstorm warning has been cancelled, people should stay alert to the danger that may be brought about by river flooding.

Please be reminded that:

The Tropical Cyclone Signal No. 3 has been issued.
The Special Announcement of Flooding in Northern New Territories has been issued.

The air temperatures at other places were:

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

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

Tai Po 3 to 45 mm;
Sha Tin 18 to 44 mm;
Yuen Long 18 to 42 mm;
North District 11 to 38 mm;
Wong Tai Sin 27 to 36 mm;
Kowloon City 19 to 30 mm;
Kwun Tong 9 to 29 mm;
Kwai Tsing 17 to 27 mm;
Tsuen Wan 2 to 27 mm;
Tuen Mun 5 to 26 mm;
Islands District 0 to 24 mm;
Yau Tsim Mong 20 to 22 mm;
Sham Shui Po 21 to 22 mm;
Wan Chai 14 to 20 mm;
Southern District 5 to 19 mm;
Eastern District 4 to 18 mm;
Central & Western District 11 to 16 mm;
Sai Kung 2 to 13 mm.

Here is the information on Severe Typhoon Sarika:
Location: 19.3 degrees north, 109.6 degrees east; Maximum sustained wind near its centre: 155 km/h.


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


Climatological Information for 18 Oct

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

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Bulletin updated at 18:15 HKT 18/Oct/2016

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

Weather forecast for tonight and tomorrow

Fresh to strong east to southeasterly winds, occasionally gale force offshore at first. Cloudy with squally showers. Showers will ease off and winds will weaken gradually tomorrow. Temperatures will range between 24 and 27 degrees. There will be rough seas and swells.

Outlook : Sunny periods on Thursday. There will be heavy squally showers and swells on Friday and Saturday.


(The above forecast period is valid up to 23:59 HKT tomorrow, 19/10/2016; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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MARINE FORECAST
Traditional Chinese Simplified Chinese

Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 18/Oct/2016

HURRICANE WARNING AREAS: PARACEL AND TONKIN.
STORM WARNING AREAS: KWANGTUNG AND DANANG.
GALE WARNING AREAS: HONG KONG AND PRATAS.

GENERAL SITUATION AT 172100 UTC:
FOR DETAILS ON SEVERE TYPHOON SARIKA (1621), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 180100 UTC:

HONG KONG= E 6-7, OCNL 8 AT FIRST. RAIN AND SQUALLY TS. SEA 4 M. SWELL E TO SE 2 M. TEMP 26-24 C. =
KWANGTUNG= E TO NE 8-9, 10-11 IN W AT FIRST. DOWN TO 500 M IN FRQ SQUALLY SHOWERS AND TS. SEA 4-6 M, UP TO 12 M IN W AT FIRST. SWELL E TO NE 2-3 M, S TO SE 3-4 M. =
TAIWAN STRAIT= NE 6-7. ISOL SHOWERS AND SQUALLY TS. SEA 3-4 M. SWELL NE 2 M. =
BASHI= E TO NE 5-6, UP TO 7 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 4 M LATER. SWELL E 2 M. =
PRATAS= E TO SE 5-6, 7-8 AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M, 4-6 M AT FIRST. SWELL E 2-3 M, S TO SE 3-4 M. =
BALINTANG= E TO NE 5-6, UP TO 7 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 4 M LATER. SWELL E 2 M. =
SCARBOROUGH= S TO SE 5-6, UP TO 7 AT FIRST. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 4 M AT FIRST. SWELL S TO SE 2-3 M. =
PARACEL= CYCLONIC 12, BEC S 8-9. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 6-8 M, UP TO 14 M AT FIRST. SWELL NE 4-6 M, S TO SE 4-6 M. =
TONKIN= N TO NW 8-9, CYCLONIC 12 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 6-8 M, UP TO 14 M LATER. SWELL NE 2-3 M LATER. =
DANANG= NW 10-11, BEC W TO SW 8-9. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 6-8 M, UP TO 12 M AT FIRST. SWELL E TO NE 3-4 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.


  • Map showing the 10 forecast areas
  • Tidal Information

    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

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    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 16:30 HKT 18/Oct/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 4:30 p.m. on 18 October 2016

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

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

    At 4 p.m., Severe Typhoon Sarika with maximum sustained winds of about 155 kilometres per hour near its centre was located at 19.1 degrees north, 109.7 degrees east, it is forecast to move northwest at about 15 kilometres per hour across Hainan. Besides, Tropical Cyclone Haima will move in the general direction of the northern part of Luzon today and tomorrow, and enter the northeastern part of the South China Sea on Thursday and edge close to the coast of Guangdong on Friday.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 6 to 7, occasionally force 8 at first.
    Some rain and squally thunderstorms. Rain will be heavy at times.
    Rough to very rough seas.

    Nan'ao and Shanwei:
    East to northeast force 6 to 7.
    Scattered squally showers and thunderstorms.
    Rough seas.

    South of Hong Kong:
    East to northeast force 7 to 8.
    Occasional heavy squally showers and thunderstorms.
    Very rough seas.

    Shangchuan Dao:
    East force 8 to 9, up to force 10 in south at first.
    Frequent heavy squally showers and thunderstorms.
    High seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 6 to 7, northerly winds of force 11 to 12 in east later. Occasional heavy squally showers and thunderstorms.

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

    Waglan Island Wind east force 6
      Visibility 1100 Metres

    Shantou Wind east force 2
      Visibility 29 Kilometres

    Dongsha Wind east-southeast force 4
      Visibility 8 Kilometres in rain

    Huangmaozhou Wind east force 7

    Macau Wind east force 4
      Visibility 11 Kilometres

    Xisha Wind southwest force 5
      Visibility 2200 Metres

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
  • Descriptive Terms of Wind Speeds
  • Visibility Readings in Hong Kong Waters
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    • WEATHER FORECAST FOR LOCAL AVIATION
    Traditional Chinese Simplified Chinese

    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 18/OCT/2016
    (Next update at 01:30 HKT 19/OCT/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS, SEV TURB AND SEV GUSTS. ISOL
     CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AT 5 P.M., SEVERE TYPHOON SARIKA WAS CENTRED
     NEAR 19.2 DEGREES NORTH, 109.7 DEGREES EAST. IT
     IS FORECAST TO MOVE NORTHWEST AT ABOUT 8 KNOTS
     ACROSS HAINAN.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/20G30
       OFFSHORE:  090/30G40                            28-25
   B.   2000 FT:  090/35G45                            21
   C.   5000 FT:  120/40                               18
   D.  10000 FT:  150/40                               11
   E.  18000 FT:  160/40                               MS2
   F.  24000 FT:  170/30                               MS12
   G.  30000 FT:  180/30                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      CLOUDY TO OVERCAST WITH RAIN.  RAIN WILL BE
      HEAVY AT TIMES WITH SQUALLY THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 3500 FT TEMPO FEW CB 1500FT SCT
      3000FT BKN 8000FT
   K. VISIBILITY    : 7 KM.  TEMPO 3000 M IN SHOWERS.  TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 16000 FT      10 DEG. C LEVEL(S) : 10500 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS AND  AT LOW LEVELS
   N. SEA STATE     : 4.0-5.5 M     SEA TEMPERATURE    : 26 DEG
IV.  FURTHER OUTLOOK: 
     FRESH TO STRONG EAST TO SOUTHEASTERLY WINDS.
     CLOUDY TO OVERCAST WITH SQUALLY SHOWERS.SHOWERS
     WILL EASE OFF LATER.=

    ===================================================================
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 15:25 HKT on 18 Oct 16

    VHHK SIGMET 2 VALID 180730/181130 VHHH- VHHK HONG KONG FIR EMBD TS FCST S OF LINE N2242 E11424 - N2142 E11730 TOP FL450 MOV NW 10KT NC=

    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 17:45 HKT 18/Oct/2016

    Tropical Cyclone Bulletin

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

    The Strong Wind Signal, No. 3 is in force.

    This means that winds with mean speeds of 41 to 62 kilometres per hour are expected.

    At 6 p.m., Severe Typhoon Sarika was estimated to be about 580 kilometres southwest of Hong Kong (near 19.3 degrees north 109.6 degrees east) and is forecast to move northwest at about 15 kilometres per hour across Hainan.
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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
    Current Weather |  Local Weather Forecast |  9-day Weather Forecast
    South China Coastal Waters |  Marine Forecast
    Severe Weather Information Centre

    Bulletin issued at 18:31 HKT 18/Oct/2016


    Tropical Cyclone Warning

    Severe Typhoon Sarika (1621) has weakened into a Typhoon with central pressure 965 hectopascals. At 180900 UTC, it was centred within 60 nautical miles of one nine point two degrees north (19.2 N) one zero nine point six degrees east (109.6 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 70 knots.

    Radius of over 33 knot winds 180 nautical miles over northern semicircle, 150 nautical miles elsewhere.
    Radius of over 47 knot winds 60 nautical miles.
    Radius of over 63 knot winds 30 nautical miles.
    Radius of over 2 metre waves 300 nautical miles over northern semicircle, 270 nautical miles elsewhere.

    Forecast position and intensity at 190900 UTC
    Two one point one degrees north (21.1 N)
    One zero seven point nine degrees east (107.9 E)
    Maximum winds 50 knots.

    Forecast position and intensity at 200900 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/Oct/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     28.8 C
Minimum Air Temperature                     24.1 C
Grass Minimum Temperature                   24.8 C
Relative Humidity                        69 - 96 Percent
Rainfall                                    16.7 mm 
Total rainfall since 1st January          2411.9 mm
Against an average of                     2306.7 mm

Other Stations                Min                  Max
King's Park                  23.7 C               29.2 C
Wong Chuk Hang               23.5 C               29.2 C
Ta Kwu Ling                  23.6 C               31.2 C
Lau Fau Shan                 24.1 C               30.0 C
Tai Po                       24.1 C               28.7 C
Sha Tin                      23.9 C               29.2 C
Tuen Mun                     24.8 C               30.4 C
Tseung Kwan O                23.7 C               29.5 C
Sai Kung                     24.3 C               28.6 C
Cheung Chau                  23.2 C               28.0 C
Chek Lap Kok                 25.2 C               31.4 C
Tsing Yi                     24.2 C               29.9 C
Shek Kong                    24.6 C               30.6 C
Tsuen Wan Ho Koon            23.2 C               28.9 C
Tsuen Wan Shing Mun Valley   23.8 C               30.1 C
Hong Kong Park               23.5 C               29.5 C
Shau Kei Wan                 23.4 C               28.8 C
Kowloon City                 23.3 C               29.7 C
Happy Valley                 24.4 C               30.6 C
Wong Tai Sin                 23.6 C               29.7 C
Stanley                      23.9 C               29.0 C
Kwun Tong                    23.9 C               29.5 C
Sham Shui Po                 23.7 C               30.1 C
Kai Tak Runway Park          24.5 C               29.4 C
Yuen Long Park               24.8 C               30.6 C

Duration of sunshine (King's Park):              2.2 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 (17 Oct 2016) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 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                           0.08
Tap Mun                             0.09
Kat O                               0.10
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.13
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                        0.15

Note

      

    1. From readings taken at various locations in Hong Kong during
the period 1987-2015, 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 Oct
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