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Bulletin issued at 19:02 HKT 16/Jul/2019

At 7 p.m. at the Hong Kong Observatory the air temperature was 31 degrees Celsius and the relative humidity 75 per cent.

Please be reminded that:

The Very Hot Weather Warning is now in force. Very hot weather might cause adverse health effects. Members of the public should take care to avoid heatstroke.

The air temperatures at other places were:

King's Park 30 degrees;
Wong Chuk Hang 30 degrees;
Ta Kwu Ling 31 degrees;
Lau Fau Shan 31 degrees;
Tai Po 31 degrees;
Sha Tin 31 degrees;
Tuen Mun 31 degrees;
Tseung Kwan O 29 degrees;
Sai Kung 31 degrees;
Cheung Chau 29 degrees;
Chek Lap Kok 31 degrees;
Tsing Yi 30 degrees;
Shek Kong 31 degrees;
Tsuen Wan Ho Koon 29 degrees;
Tsuen Wan Shing Mun Valley 30 degrees;
Hong Kong Park 30 degrees;
Shau Kei Wan 30 degrees;
Kowloon City 30 degrees;
Happy Valley 31 degrees;
Wong Tai Sin 31 degrees;
Stanley 30 degrees;
Kwun Tong 31 degrees;
Sham Shui Po 30 degrees;
Kai Tak Runway Park 30 degrees;
Yuen Long Park 31 degrees;
Tai Mei Tuk 31 degrees.

Here is the information on Tropical Depression Danas at 7 p.m.:
Location: 17.5 degrees north, 124.2 degrees east.


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


Climatological Information for 16 Jul

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 18:45 HKT 16/Jul/2019

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

An anticyclone aloft is bringing generally fine weather to southeastern China. Locally, it was very hot in the afternoon with temperatures over most parts of the territory rose to 33 degrees or above.

At 7 p.m., Tropical Depression Danas was centred about 480 kilometres northeast of Manila. It is forecast to move northwest at about 12 kilometres per hour towards the vicinity of Luzon Strait.

Weather forecast for tonight and tomorrow

Mainly Fine. The minimum temperature will be about 28 degrees. Very hot tomorrow with a maximum temperature of about 34 degrees. Some haze. Light winds.

Outlook : Still very hot on Thursday with a few squally thunderstorms later. A few showers in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 17/07/2019; 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 09:00 HKT 16/Jul/2019

GALE WARNING AREAS: BASHI AND BALINTANG.

GENERAL SITUATION AT 152100 UTC:
A SOUTHERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 160100 UTC:

HONG KONG= S 3-4. FINE. TEMP 34-29 C. =
KWANGTUNG= S 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
TAIWAN STRAIT= SW 4-5, NE 4-5 LATER. ISOL SHOWERS. SEA UP TO 2 M. =
BASHI= N 5-6, N TO NE 7-8 LATER. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA 2-3 M, 4-6 M LATER. SWELL E TO SE 2-3 M. =
PRATAS= NE 4-5, 6 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. =
BALINTANG= N 5-6, CYCLONIC 7-8 LATER. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA 2-3 M, 4-6 M LATER. SWELL E TO SE 2-3 M. =
SCARBOROUGH= S TO SW 4-5, N 6-7 LATER. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M, 3-4 M LATER. =
PARACEL= S 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
TONKIN= S 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
DANANG= S 4-5. ISOL SHOWERS. SEA UP TO 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.


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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 16/Jul/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 7:30 p.m. on 16 July 2019

    Weather Situation:
    At 7 p.m., Tropical Depression Danas with maximum sustained winds of about 55 kilometres per hour near its centre was located at 17.5 degrees north, 124.2 degrees east. It is forecast to move northwest at about 12 kilometres per hour towards the vicinity of Luzon Strait.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South to southwest force 3 to 4.
    Some haze tomorrow.
    Slight to moderate seas.

    Nan'ao and Shanwei:
    West to northwest force 4 to 5.
    Isolated squally showers and thunderstorms.
    Moderate seas.

    South of Hong Kong:
    Southwest force 4 to 5, becoming west to northwest force 4 to 5.
    Moderate seas.

    Shangchuan Dao:
    South to southwest force 4 to 5.
    Moderate seas.

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

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

    Waglan Island Wind west force 3
      Visibility 49 Kilometres

    Shantou Wind southeast force 2
      Visibility 26 Kilometres

    Dongsha Wind north force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind west-southwest force 2

    Macau Wind south-southeast force 2
      Visibility 23 Kilometres

    Xisha Wind north-northeast force 2
      Visibility 24 Kilometres

  • Explanation of Seas or Sea Waves
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 16/JUL/2019
    (Next update at 01:30 HKT 17/JUL/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN ANTICYCLONE ALOFT IS BRINGING GENERALLY FINE
     WEATHER TO SOUTHEASTERN CHINA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  250/5-10
       OFFSHORE:  260/10-15                            34-29
   B.   2000 FT:  170/10-15                            25
   C.   5000 FT:  020/10                               21
   D.  10000 FT:  090/10                               12
   E.  18000 FT:  110/15                               MS3
   F.  24000 FT:  080/10                               MS13
   G.  30000 FT:  040/20                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      3800-4300 FT
   I. WEATHER       : 
      FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 18500 FT      10 DEG. C LEVEL(S) : 12000 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 28 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT WINDS. MAINLY FINE AND LOCALIZED HAZE.=

    ===================================================================
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.

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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.

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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 18:30 HKT 16/Jul/2019


    Tropical Cyclone Warning

    Tropical Depression Danas (1905) has entered the area of responsibility of the Hong Kong Observatory.

    At 160900 UTC, Tropical Depression Danas (1905) with central pressure 998 hectopascals was centred within 90 nautical miles of one seven point three degrees north (17.3 N) one two four point five degrees east (124.5 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 30 knots.

    Radius of over 2 metre waves 90 nautical miles.

    Forecast position and intensity at 170900 UTC
    One eight point six degrees north (18.6 N)
    One two three point two degrees east (123.2 E)
    Maximum winds 40 knots.

    Forecast position and intensity at 180900 UTC
    Two one point two degrees north (21.2 N)
    One two one point six degrees east (121.6 E)
    Maximum winds 45 knots.

    Forecast position and intensity at 190900 UTC
    Two four point nine degrees north (24.9 N)
    One two zero point four degrees east (120.4 E)
    Maximum winds 35 knots.

    Forecast position and intensity at 200900 UTC
    Two eight point one degrees north (28.1 N)
    One two zero point five degrees east (120.5 E)
    Maximum winds 25 knots.

    Forecast position and intensity at 210900 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 16/Jul/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     33.7 C
Minimum Air Temperature                     28.7 C
Grass Minimum Temperature                   27.6 C
Relative Humidity                        65 - 85 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          1272.0 mm
Against an average of                     1261.9 mm

Other Stations                Min                  Max
King's Park                  28.0 C               33.0 C
Wong Chuk Hang               27.8 C               31.6 C
Ta Kwu Ling                  25.9 C               33.8 C
Lau Fau Shan                 27.4 C               33.2 C
Tai Po                       26.5 C               33.7 C
Sha Tin                      27.3 C               34.0 C
Tuen Mun                     27.9 C               33.1 C
Tseung Kwan O                26.4 C               33.3 C
Sai Kung                     27.4 C               31.9 C
Cheung Chau                  26.8 C               34.9 C
Chek Lap Kok                 28.8 C               34.9 C
Tsing Yi                     27.7 C               32.7 C
Shek Kong                    27.0 C               34.2 C
Tsuen Wan Ho Koon            27.0 C               32.1 C
Tsuen Wan Shing Mun Valley   27.7 C               32.9 C
Hong Kong Park               28.4 C               32.4 C
Shau Kei Wan                 27.8 C               32.6 C
Kowloon City                 28.0 C               34.0 C
Happy Valley                 28.6 C               33.4 C
Wong Tai Sin                 27.9 C               32.9 C
Stanley                      28.1 C               32.6 C
Kwun Tong                    28.0 C               33.6 C
Sham Shui Po                 28.0 C               32.9 C
Kai Tak Runway Park          28.1 C               33.4 C
Yuen Long Park               27.6 C               34.2 C
Tai Mei Tuk               27.4 C               35.0 C

Duration of sunshine (King's Park):              9.6 H
The mean UV index recorded at King's Park yesterday was 5,
the UV intensity was Moderate.
The maximum UV index for yesterday was 11.
 

Yesterday's (15 Jul 2019) 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                             0.08
Kat O                               0.10
Yuen Ng Fan                         0.11
Tai Mei Tuk                         0.10
Sha Tau Kok                         0.10
Kwun Tong                           0.13
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 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 15 Jul
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