MARINE FORECAST
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 05/Jun/2018

GALE WARNING AREAS: PARACEL AND DANANG.

GENERAL SITUATION AT 042100 UTC:
FOR DETAILS ON TROPICAL DEPRESSION OVER CENTRAL PART OF THE SOUTH CHINA SEA, PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 050100 UTC:

HONG KONG= E TO SE 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL E TO SE 2 M. TEMP 30-26 C. =
KWANGTUNG= E TO SE 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL E TO SE 2-3 M. =
TAIWAN STRAIT= E TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL S TO SE 2 M. =
BASHI= E TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E TO SE 2 M. =
PRATAS= S TO SE 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL E TO SE 2-3 M, SW 2 M. =
BALINTANG= E TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E TO SE 2 M. =
SCARBOROUGH= S 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL S TO SW 2-3 M. =
PARACEL= CYCLONIC 7-8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL SE 2-3 M, SW 2-3 M. =
TONKIN= N TO NE 6-7. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SE 2 M. =
DANANG= W TO NW 7-8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL SE 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.


  • Map showing the 10 forecast areas
  • Tidal Information

    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

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    Bulletin issued at 12:30 HKT 05/Jun/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 05 June 2018

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    An easterly airstream is affecting the south China coastal waters.

    At noon, the tropical depression over the central part of the South China Sea with maximum sustained winds of about 55 kilometres per hour near its centre was located near 17.9 degrees north, 111.2 degrees east. It is forecast to move north at about 12 kilometres per hour towards the vicinity of Hainan Island.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to southeast force 5 to 6, occasionally force 7.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao, Shanwei and South of Hong Kong:
    East to southeast force 5 to 6, occasionally force 7.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

    Shangchuan Dao:
    East to southeast force 5 to 6, occasionally force 7.
    Frequent heavy squally showers and thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    East to southeasterly winds of force 6 to 7. Frequent heavy squally showers and thunderstorms.

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

    Waglan Island Wind east force 4
      Visibility 35 Kilometres

    Shantou Wind east-southeast force 2
      Visibility 6 Kilometres in showers

    Huangmaozhou Wind south-southeast force 5

    Macau Wind east force 2
      Visibility 17 Kilometres

    Xisha Wind south-southwest force 4
      Visibility 6 Kilometres in showers

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
  • Descriptive Terms of Wind Speeds
  • Visibility Readings in Hong Kong Waters
  • Map showing forecast areas
  • Tidal Information

    • TROPICAL CYCLONE WARNING Skip to main content
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    Tropical Cyclone Warnings

    Bulletin issued at 11:45 HKT 05/Jun/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 noon, the tropical depression over the central part of the South China Sea was estimated to be about 580 kilometres south-southwest of Hong Kong (near 17.9 degrees north 111.2 degrees east) and is forecast to move north at about 12 kilometres per hour towards the vicinity of Hainan Island.

    The tropical depression moved northwards steadily this morning and edged gradually towards the coast of Guangdong. It also strengthened slightly. According to the present forecast track, the tropical depression will maintain a distance of over 500 km from Hong Kong for most of today. Unless the tropical depression takes a track closer to Hong Kong or intensify significantly, the chance to issue higher signals today will not be high. The outer rain bands associated with the tropical depression are expected to bring squally showers to the territory in the next couple of days.

    (Precautionary Announcements with No. 1 Signal)

    1. Precautions should be taken. Drains should be cleared of obstructions, and windows and doors should be checked.

    2. Drains should be cleared of leaves and rubbish. People in low-lying areas should take precautions against flooding.

    3. Those who have duties during a tropical cyclone should now remain on call.

    4. People planning to visit Guangdong, Macau, outlying islands or remote parts of Hong Kong should note that changes in weather may affect your trips.

    5. There may be swells, you are advised to stay away from the shoreline.

    6. Listen to radio, watch TV or browse the Hong Kong Observatorys website and mobile app for latest information on the tropical cyclone.
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    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 05/Jun/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.2 C
Minimum Air Temperature                     26.5 C
Grass Minimum Temperature                   26.3 C
Relative Humidity                        70 - 93 Percent
Rainfall                                    12.4 mm 
Total rainfall since 1st January           187.4 mm
Against an average of                      681.5 mm

Other Stations                Min                  Max
King's Park                  25.9 C               31.0 C
Wong Chuk Hang               26.3 C               30.7 C
Ta Kwu Ling                  27.0 C               33.1 C
Lau Fau Shan                 25.5 C               31.5 C
Tai Po                       26.8 C               29.3 C
Sha Tin                      26.4 C               30.8 C
Tuen Mun                     26.5 C               32.0 C
Tseung Kwan O                25.4 C               29.2 C
Sai Kung                     26.2 C               29.1 C
Cheung Chau                  26.0 C               30.8 C
Chek Lap Kok                 27.3 C               32.5 C
Tsing Yi                     26.2 C               31.6 C
Shek Kong                    26.6 C               31.5 C
Tsuen Wan Ho Koon            25.0 C               31.0 C
Tsuen Wan Shing Mun Valley   26.0 C               30.5 C
Hong Kong Park               25.5 C               29.0 C
Shau Kei Wan                 25.2 C               29.4 C
Kowloon City                 25.5 C               31.2 C
Happy Valley                 26.6 C               30.8 C
Wong Tai Sin                 25.4 C               31.1 C
Stanley                      26.3 C               29.9 C
Kwun Tong                    25.8 C               29.2 C
Sham Shui Po                 26.4 C               31.5 C
Kai Tak Runway Park          26.2 C               29.5 C
Yuen Long Park               25.7 C               31.9 C
Tai Mei Tuk               25.7 C               32.7 C

Duration of sunshine (King's Park):              2.1 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 9.
Sea surface temperature (Waglan Island):        28.2 C 

Yesterday's (04 Jun 2018) 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                           0.09
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                           0.12
Sai Wan Ho                          0.08
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 04 Jun
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