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Bulletin issued at 04:02 HKT 18/Oct/2018

At 4 a.m. at the Hong Kong Observatory the air temperature was 22 degrees Celsius and the relative humidity 93 per cent.

The air temperatures at other places were:

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

Between 2:45 and 3:45 a.m., the rainfall recorded in various regions were:

Tai Po 0 to 2 mm;
Central & Western District 0 to 1 mm;
Islands District 0 to 1 mm;
Tuen Mun 0 to 1 mm;
North District 1 mm;
Southern District 0 to 1 mm;
Sai Kung 0 to 1 mm;
Tsuen Wan 0 to 1 mm;
Sha Tin 0 to 1 mm;
Yuen Long 0 to 1 mm.


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


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

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UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 03:45 HKT 18/Oct/2018

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

The northeast monsoon is affecting the south China coast. Meanwhile, a broad band of clouds is bringing rainy weather to the region.

Weather forecast for today

Cloudy with a few rain patches. Slightly cooler with temperatures ranging between 21 and 25 degrees. Moderate northeasterly winds, strengthening from the east later.

Outlook : Windy and there will still be a few rain patches on Friday. The weather will improve during the weekend.


(The above forecast period is valid up to 23:59 HKT today, 18/10/2018; 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 17/Oct/2018

GALE WARNING AREAS: TAIWAN STRAIT AND BASHI.

GENERAL SITUATION AT 170900 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 171300 UTC:

HONG KONG= N 5-6, E TO NE UP TO 7 TOMORROW. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M, BEC 4 M. SWELL N TO NE 2 M. TEMP 22-25 C. =
KWANGTUNG= N 6-7, E TO NE 6-7 TOMORROW. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL N TO NE 2-3 M. =
TAIWAN STRAIT= N TO NE 7-8. ISOL SHOWERS AND TS. SEA 4-6 M. SWELL N TO NE 2-3 M. =
BASHI= N 6-7, E TO NE 7-8 TOMORROW. ISOL SHOWERS AND TS. SEA 3-4 M, UP TO 6 M LATER. SWELL N 2-3 M. =
PRATAS= N 6-7, E TO NE 6-7 TOMORROW. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL N TO NE 2-3 M. =
BALINTANG= N 5-6, E TO NE UP TO 7 TOMORROW. ISOL SHOWERS AND TS. SEA 2-3 M, UP TO 4 M LATER. SWELL N 2-3 M. =
SCARBOROUGH= N 4-5, E TO NE UP TO 6 TOMORROW. ISOL SHOWERS AND TS. SEA 2 M, UP TO 3 M LATER. SWELL N TO NE 2 M. =
PARACEL= N 5-6, E TO NE UP TO 7 TOMORROW. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 4 M LATER. SWELL N TO NE 2 M. =
TONKIN= N 5-6, E TO NE 6 TOMORROW. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL N TO NE 2 M. =
DANANG= N 4-5, E TO NE 5 TOMORROW. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL N TO 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.


  • Map showing the 10 forecast areas
  • Tidal Information

    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

    Current Weather | Local Weather Forecast | Regional Temperature Forecast in HK
    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 03:30 HKT 18/Oct/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 18 October 2018

    Warnings:
    Strong winds in all areas.

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Northeast force 5 to 6, becoming east up to force 7 later.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas.

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

    South of Hong Kong and Shangchuan Dao:
    Northeast force 5 to 6, becoming east up to force 7 later.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    Easterly winds of force 6 to 7. Isolated showers and thunderstorms.

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

    Waglan Island Wind north-northeast force 5
      Visibility 8 Kilometres

    Shantou Wind northeast force 1
      Visibility 30 Kilometres

    Dongsha Wind northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind northeast force 5

    Macau Wind north force 2
      Visibility 1200 Metres in rain

    Xisha Wind east-northeast force 1
      Visibility 30 Kilometres

  • Explanation of Seas or Sea Waves
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  • 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 18/OCT/2018
    (Next update at 9:00-9:30 HKT 18/OCT/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 COAST.  MEANWHILE, A BROAD BAND OF CLOUDS
     IS BRINGING RAINY WEATHER TO THE REGION.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  030/10
       OFFSHORE:  030/15-20                            21-25
   B.   2000 FT:  060/15                               17
   C.   5000 FT:  090/10                               15
   D.  10000 FT:  290/15                               7
   E.  18000 FT:  270/25                               MS6
   F.  24000 FT:  280/40                               MS16
   G.  30000 FT:  290/45                               MS32
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      CLOUDY WITH A FEW RAIN PATCHES AND MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT  SCT 2500 FT  BKN 8000 FT.
   K. VISIBILITY    : 8 KM.  TEMPO 4000 M IN RAIN/MIST.
   L. 0 DEG. C LEVEL: 16000 FT      10 DEG. C LEVEL(S) : 9400 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.0 M         SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EAST TO NORTHEASTERLY WINDS,
     OCCASIONALLY STRONG OFFSHORE.  CLOUDY WITH A FEW
     RAIN PATCHES AND MIST.=

    ===================================================================
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 02:40 HKT on 16 Oct 18

    VHHK SIGMET 1 VALID 151840/152240 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2130 E11148 - N2200 E11330 - N2112 E11342 - N2042 E11212 - N2130 E11148 TOP FL380 MOV S 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

    There is no tropical cyclone warning for shipping*.




    *Tropical cyclone warnings for shipping are issued by the Hong Kong Observatory for tropical cyclones located within the area bounded by 105E and 125E , 10N and 30N.




    For other tropical cyclone related information, please visit the World Meteorological Organization Web Site - Severe Weather Information Centre.

    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/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     25.2 C
Minimum Air Temperature                     21.9 C
Grass Minimum Temperature                   22.8 C
Relative Humidity                        76 - 93 Percent
Rainfall                                     1.5 mm 
Total rainfall since 1st January          2064.7 mm
Against an average of                     2306.7 mm

Other Stations                Min                  Max
King's Park                  21.4 C               25.2 C
Wong Chuk Hang               21.8 C               26.5 C
Ta Kwu Ling                  20.8 C               23.0 C
Lau Fau Shan                 20.1 C               23.0 C
Tai Po                       20.4 C               23.0 C
Sha Tin                      21.0 C               23.8 C
Tuen Mun                     20.9 C               23.7 C
Tseung Kwan O                20.8 C               25.1 C
Sai Kung                     21.2 C               23.9 C
Cheung Chau                  20.5 C               25.6 C
Chek Lap Kok                 21.6 C               24.9 C
Tsing Yi                     21.8 C               25.3 C
Shek Kong                    20.8 C               23.1 C
Tsuen Wan Ho Koon            20.1 C               23.6 C
Tsuen Wan Shing Mun Valley   20.8 C               24.3 C
Hong Kong Park               21.1 C               25.9 C
Shau Kei Wan                 20.9 C               26.9 C
Kowloon City                 21.0 C               25.0 C
Happy Valley                 22.0 C               26.4 C
Wong Tai Sin                 21.0 C               25.0 C
Stanley                      21.2 C               26.4 C
Kwun Tong                    21.1 C               25.3 C
Sham Shui Po                 21.0 C               24.8 C
Kai Tak Runway Park          21.6 C               26.2 C
Yuen Long Park               20.6 C               23.4 C
Tai Mei Tuk               20.5 C               23.6 C

Duration of sunshine (King's Park):              0 H
The mean UV index recorded at King's Park yesterday was 1,
the UV intensity was Low.
The maximum UV index for yesterday was 4.
 

Yesterday's (17 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                         0.11
Kwun Tong                           0.13
Sai Wan Ho                          0.09
King's Park                         0.15
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.14
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 17 Oct
     2003copy right image | Important notices | Privacy policy Last revision date: <18 Oct 2018> 

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