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Bulletin issued at 16:02 HKT 17/Jul/2019

At 4 p.m. at the Hong Kong Observatory the air temperature was 33 degrees Celsius and the relative humidity 69 per cent.
During the past hour the mean UV Index recorded at King's Park was 3. The intensity of UV radiation was moderate.

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 33 degrees;
Wong Chuk Hang 32 degrees;
Ta Kwu Ling 34 degrees;
Lau Fau Shan 33 degrees;
Tai Po 34 degrees;
Sha Tin 34 degrees;
Tuen Mun 33 degrees;
Tseung Kwan O 33 degrees;
Sai Kung 33 degrees;
Cheung Chau 32 degrees;
Chek Lap Kok 33 degrees;
Tsing Yi 32 degrees;
Shek Kong 34 degrees;
Tsuen Wan Ho Koon 31 degrees;
Tsuen Wan Shing Mun Valley 33 degrees;
Hong Kong Park 33 degrees;
Shau Kei Wan 32 degrees;
Kowloon City 33 degrees;
Happy Valley 33 degrees;
Wong Tai Sin 34 degrees;
Stanley 31 degrees;
Kwun Tong 33 degrees;
Sham Shui Po 33 degrees;
Kai Tak Runway Park 33 degrees;
Yuen Long Park 35 degrees;
Tai Mei Tuk 34 degrees.

Here is the information on Tropical Depression Danas at 4 p.m.:
Location: 19.6 degrees north, 124.0 degrees east.


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


Climatological Information for 17 Jul

Regional Weather in Hong Kong

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Bulletin updated at 16:15 HKT 17/Jul/2019

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

Winds are weak over the coast of Guangdong. Meanwhile, a broad area of clouds is bringing unsettled weather to the seas west of Luzon.

At 4 p.m., Tropical Depression Danas was centred about 510 kilometres southeast of Gaoxiong. It is forecast to move north at about 22 kilometres per hour towards the vicinity of Taiwan.

Weather forecast for tonight and tomorrow

Mainly cloudy and hazy. The minimum temperature will be about 28 degrees. Very hot with sunny periods tomorrow with a maximum temperature of around 33 degrees in the urban areas, and a couple of degrees higher in the New Territories. A few showers and squally thunderstorms tonight and later tomorrow. Light to moderate westerly winds.

Outlook : A few showers in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 18/07/2019; 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 17/Jul/2019

GALE WARNING AREAS: BASHI AND BALINTANG.

GENERAL SITUATION AT 162100 UTC:
FOR DETAILS ON TROPICAL DEPRESSION DANAS (1905), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 170100 UTC:

HONG KONG= W TO SW 3-4. DOWN TO 4000 M IN HAZE. TEMP 34-28 C. =
KWANGTUNG= W TO NW 4-5. FINE. SEA UP TO 2 M. =
TAIWAN STRAIT= NE 5-6, UP TO 7 LATER. ISOL SHOWERS AND TS. SEA 2-3 M, UP TO 4 M LATER. =
BASHI= N TO NE 6-7, CYCLONIC 8 LATER. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 6 M LATER. SWELL E 3 M, NE 2 M. =
PRATAS= N 4-5, 6 LATER. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA 2 M, UP TO 3 M LATER. =
BALINTANG= N TO NE 6-7, CYCLONIC 8 LATER. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 6 M LATER. SWELL E 3 M, NE 2 M. =
SCARBOROUGH= W TO NW 5-6, UP TO 7 LATER. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 4 M LATER. SWELL NE 2 M. =
PARACEL= SW 4-5. ISOL SHOWERS AND TS. 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 16:30 HKT 17/Jul/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 4:30 p.m. on 17 July 2019

    Weather Situation:
    At 4 p.m., Tropical Depression Danas with maximum sustained winds of about 55 kilometres per hour near its centre was located at 19.6 degrees north, 124.0 degrees east. It is forecast to move north at about 22 kilometres per hour towards the vicinity of Taiwan.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    West force 3 to 4.
    Hazy with isolated showers and thunderstorms.
    Slight to moderate seas.

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

    South of Hong Kong:
    West to northwest force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

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

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

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

    Waglan Island Wind west-southwest force 3
      Visibility 18 Kilometres

    Shantou Wind south-southeast force 2
      Visibility 17 Kilometres

    Dongsha Wind north force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind west force 3

    Macau Wind southeast force 1
      Visibility 10 Kilometres

    Xisha Wind west-northwest force 2
      Visibility 30 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 14:30 HKT 17/JUL/2019
    (Next update at 17:30 HKT 17/JUL/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN ANTICYCLONE ALOFT IS BRINGING GENERALLY FINE
     WEATHER TO SOUTHEASTERN CHINA. BESIDES, A BROAD
     BAND OF CLOUDS IS BRINGING UNSETTLED WEATHER TO
     THE SEAS WEST OF LUZON.
     AT NOON., TROPICAL DEPRESSION DANAS WAS CENTRED
     AT 18.8 DEGREES NORTH, 123.4 DEGREES EAST. IT IS
     FORECAST TO MOVE NORTH OR NORTH-NORTHWEST AT
     ABOUT 8 KNOTS TOWARDS THE VICINITY OF TAIWAN.
     
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1430 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  VRB/5-10
                  BECMG 250/5-10
       OFFSHORE:  260/10-15                            35-29
   B.   2000 FT:  320/10                               26
   C.   5000 FT:  020/15                               21
   D.  10000 FT:  040/20                               14
   E.  18000 FT:  060/25                               0
   F.  24000 FT:  070/25                               MS13
   G.  30000 FT:  080/30                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY FINE WITH LOCALIZED HAZE. ISOLATED
      SHOWERS AND THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT.
      TEMPO CB FEW 1000 FT SCT 2000 FT BKN 4500FT.
   K. VISIBILITY    : 7 KM. TEMPO 4000 M IN HAZE. TEMPO 4000 M IN SHOWERS. TEMPO 2500 M IN TS.
   L. 0 DEG. C LEVEL: 18000 FT      10 DEG. C LEVEL(S) : 12400 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE WESTERLY WINDS. CLOUDY PERIODS
     WITH LOCALIZED HAZE. ISOLATED SHOWERS.=

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

    There is no Significant Weather Information (SIGMET)

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    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

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    Bulletin issued at 15:30 HKT 17/Jul/2019


    Tropical Cyclone Warning

    At 170600 UTC, Tropical Depression Danas (1905) with central pressure 995 hectopascals was centred within 60 nautical miles of one nine point zero degrees north (19.0 N) one two three point seven degrees east (123.7 E) and is forecast to move north at about 12 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 30 knots.

    Radius of over 2 metre waves 120 nautical miles over southeast quadrant, 90 nautical miles elsewhere.

    Forecast position and intensity at 180600 UTC
    Two five point three degrees north (25.3 N)
    One two four point four degrees east (124.4 E)
    Maximum winds 35 knots.

    Forecast position and intensity at 190600 UTC
    Two nine point seven degrees north (29.7 N)
    One two five point six degrees east (125.6 E)
    Maximum winds 40 knots.

    Forecast position and intensity at 200600 UTC
    Three four point four degrees north (34.4 N)
    One two eight point nine degrees east (128.9 E)
    Maximum winds 35 knots.

    Forecast position and intensity at 210600 UTC
    Become extratropical low.



    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 17/Jul/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     33.4 C
Minimum Air Temperature                     28.4 C
Grass Minimum Temperature                   27.5 C
Relative Humidity                        58 - 88 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          1272.0 mm
Against an average of                     1276.0 mm

Other Stations                Min                  Max
King's Park                  27.7 C               33.1 C
Wong Chuk Hang               26.7 C               31.9 C
Ta Kwu Ling                  25.4 C               34.8 C
Lau Fau Shan                 27.3 C               33.2 C
Tai Po                       26.3 C               33.1 C
Sha Tin                      26.9 C               34.2 C
Tuen Mun                     27.5 C               34.2 C
Tseung Kwan O                26.1 C               33.0 C
Sai Kung                     27.0 C               33.6 C
Cheung Chau                  26.6 C               34.9 C
Chek Lap Kok                 28.0 C               34.8 C
Tsing Yi                     27.0 C               32.6 C
Shek Kong                    26.4 C               34.9 C
Tsuen Wan Ho Koon            25.5 C               31.7 C
Tsuen Wan Shing Mun Valley   27.0 C               33.4 C
Hong Kong Park               27.4 C               33.4 C
Shau Kei Wan                 27.2 C               33.0 C
Kowloon City                 27.7 C               34.6 C
Wong Tai Sin                 27.7 C               35.3 C
Stanley                      27.0 C               32.9 C
Kwun Tong                    27.9 C               33.9 C
Sham Shui Po                 27.6 C               33.4 C
Kai Tak Runway Park          27.5 C               33.1 C
Yuen Long Park               26.9 C               35.9 C
Tai Mei Tuk               26.9 C               35.2 C

Duration of sunshine (King's Park):              10.9 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 (16 Jul 2019) 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                         0.11
Tai Mei Tuk                         0.10
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 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 16 Jul
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