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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 19/Jun/2018

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

GENERAL SITUATION AT 190900 UTC:
A SOUTHWESTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 191300 UTC:

HONG KONG= SW 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL SW 2 M. TEMP 28-33 C. =
KWANGTUNG= SW 6-7, OCNL 8 IN E. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS IN E. SEA 3-4 M, UP TO 6 M IN E. SWELL SW 2-3 M. =
TAIWAN STRAIT= SW 6-7, OCNL 8. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL SW 3 M. =
BASHI= SW 6-7, OCNL 8. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL SW 3 M. =
PRATAS= SW 6-7, OCNL 8. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL SW 2-3 M. =
BALINTANG= SW 6-7, OCNL 8. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL SW 3 M. =
SCARBOROUGH= SW 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SW 3 M. =
PARACEL= S TO SW 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL SW 3 M. =
TONKIN= S TO SW 5-6, OCNL 7. ISOL SHOWERS AND TS. SEA UP TO 4 M. SWELL S TO SW 2 M. =
DANANG= S TO SW 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL S TO SW 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

    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 20/Jun/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 20 June 2018

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    A southwesterly airstream is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Southwest force 5 to 6.
    Isolated showers.
    Moderate to rough seas.

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

    Shanwei:
    Southwest force 6 to 7.
    Isolated showers and thunderstorms.
    Rough seas.

    South of Hong Kong and Shangchuan Dao:
    Southwest force 5 to 6.
    Moderate to rough seas.

    Outlook for the next 48 hours
    Southwesterly winds of force 5 to 6. Isolated showers and thunderstorms.

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

    Waglan Island Wind southwest force 5

    Shantou Wind southwest force 1
      Visibility 25 Kilometres

    Huangmaozhou Wind southwest force 4

    Macau Wind south-southwest force 2
      Visibility 10 Kilometres

    Xisha Wind south-southwest force 5
      Visibility 11 Kilometres

  • 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

    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 20/JUN/2018
    (Next update at 9:00-9:30 HKT 20/JUN/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A SOUTHWESTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL WATERS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  220/10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  220/15-20                            28-33
   B.   2000 FT:  230/20-25                            23
   C.   5000 FT:  230/20                               20
   D.  10000 FT:  240/15                               12
   E.  18000 FT:  330/5-10                             MS2
   F.  24000 FT:  020/10                               MS14
   G.  30000 FT:  080/10                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH ONE OR TWO SHOWERS IN THE
      MORNING. A CHANCE OF ISOLATED THUNDERSTORMS.
      SUNNY PERIODS DURING THE DAY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1200 FT  SCT 3000 FT.  TEMPO FEW CB 1000 FT
      SCT 2000 FT  BKN 4000 FT.
   K. VISIBILITY    : 10 KM. TEMPO 4000 M IN SHOWERS. TEMPO 2500 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 11800 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS AND HILLS. MOD OFFSHORE
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 29 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHWESTERLY WINDS, FRESH OFFSHORE.
     SUNNY PERIODS. ISOLATED SHOWERS AND
     THUNDERSTORMS.=

    ===================================================================
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 16:25 HKT on 19 Jun 18

    VHHK SIGMET 1 VALID 190430/190830 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N2100 E11730 - N2042 E11536 - N2300 E11518 - N2342 E11730 - N2100 E11730 TOP FL420 MOV E 10KT WKN= VHHK SIGMET 2 VALID 190830/191130 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2254 E11454 - N2342 E11730 - N2130 E11730 - N2124 E11454 - N2254 E11454 TOP FL400 MOV E 10KT WKN=

    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.

    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 20/Jun/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.5 C
Minimum Air Temperature                     28.6 C
Grass Minimum Temperature                   26.8 C
Relative Humidity                        71 - 84 Percent
Rainfall                                      Trace 
Total rainfall since 1st January           546.7 mm
Against an average of                      936.0 mm

Other Stations                Min                  Max
King's Park                  28.0 C               31.3 C
Wong Chuk Hang               27.9 C               30.6 C
Ta Kwu Ling                  26.0 C               33.1 C
Lau Fau Shan                 26.0 C               33.0 C
Tai Po                       27.1 C               31.9 C
Sha Tin                      28.0 C               31.6 C
Tuen Mun                     27.8 C               32.0 C
Tseung Kwan O                27.1 C               32.2 C
Sai Kung                     28.5 C               33.0 C
Cheung Chau                  27.1 C               31.5 C
Chek Lap Kok                 28.1 C               33.8 C
Tsing Yi                     28.0 C               31.4 C
Shek Kong                    27.5 C               33.3 C
Tsuen Wan Ho Koon            26.9 C               28.9 C
Tsuen Wan Shing Mun Valley   28.1 C               30.2 C
Hong Kong Park               28.3 C               30.9 C
Shau Kei Wan                 27.1 C               31.0 C
Kowloon City                 27.6 C               31.5 C
Happy Valley                 28.0 C               31.0 C
Wong Tai Sin                 28.2 C               31.9 C
Stanley                      27.6 C               29.8 C
Kwun Tong                    27.7 C               31.4 C
Sham Shui Po                 27.8 C               31.0 C
Kai Tak Runway Park          27.8 C               31.3 C
Yuen Long Park               27.4 C               33.3 C
Tai Mei Tuk               26.9 C               32.4 C

Duration of sunshine (King's Park):              2.5 H
The mean UV index recorded at King's Park yesterday was 4,
the UV intensity was Moderate.
The maximum UV index for yesterday was 10.
 

Yesterday's (19 Jun 2018) 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                           0.09
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                         0.14
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 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 19 Jun
     2003copy right image | Important notices | Privacy policy Last revision date: <20 Jun 2018> 

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