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Bulletin issued at 03:02 HKT 24/Aug/2019

At 3 a.m. at the Hong Kong Observatory the air temperature was 28 degrees Celsius and the relative humidity 83 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 28 degrees;
Wong Chuk Hang 26 degrees;
Ta Kwu Ling 25 degrees;
Lau Fau Shan 26 degrees;
Tai Po 27 degrees;
Sha Tin 27 degrees;
Tuen Mun 26 degrees;
Tseung Kwan O 26 degrees;
Sai Kung 27 degrees;
Cheung Chau 26 degrees;
Chek Lap Kok 28 degrees;
Tsing Yi 26 degrees;
Shek Kong 25 degrees;
Tsuen Wan Ho Koon 25 degrees;
Tsuen Wan Shing Mun Valley 25 degrees;
Hong Kong Park 27 degrees;
Shau Kei Wan 27 degrees;
Kowloon City 28 degrees;
Happy Valley 27 degrees;
Wong Tai Sin 27 degrees;
Stanley 27 degrees;
Kwun Tong 28 degrees;
Sham Shui Po 27 degrees;
Kai Tak Runway Park 27 degrees;
Yuen Long Park 26 degrees;
Tai Mei Tuk 27 degrees.

Here is the information on Severe Tropical Storm Bailu at 3 a.m.:
Location: 20.7 degrees north, 123.3 degrees east.


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


Climatological Information for 24 Aug

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 02:45 HKT 24/Aug/2019

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

Winds were weak over the coastal areas of Guangdong.

At 2 a.m., Severe Tropical Storm Bailu was centred about 460 kilometres east-southeast of Gaoxiong. It is forecast to move northwest at about 28 kilometres per hour towards the vicinity of the southern part of Taiwan.

Weather forecast for today

Mainly cloudy. The minimum temperature will be about 28 degrees. Very hot with sunny periods and haze during the day. The maximum temperature will be around 34 degrees in the urban areas, and a couple of degrees higher in the New Territories. A few showers and isolated squally thunderstorms later. Light winds, becoming moderate west to northwesterlies.

Outlook : Windier with occasional showers and thunderstorms on Sunday. Weather will improve with less showers in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 24/08/2019; 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 21:00 HKT 23/Aug/2019

HURRICANE WARNING AREAS: TAIWAN STRAIT, BASHI AND BALINTANG.
GALE WARNING AREA: SCARBOROUGH.

GENERAL SITUATION AT 230900 UTC:
FOR DETAILS ON SEVERE TROPICAL STORM BAILU (1911) , PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 231300 UTC:

HONG KONG= NW 4. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. DOWN TO 4000 M IN SOME HAZE. TEMP 28-34 C. =
KWANGTUNG= NW 4-5, 6 IN E LATER. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2 M, 3 M IN E LATER. SWELL E 2 M, S TO SW 2 M. =
TAIWAN STRAIT= N TO NE 7-8, CYCLONIC UP TO 12 LATER. DOWN TO 500 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M, UP TO 14M LATER. SWELL NE 3-5 M UP TO 7M LATER. =
BASHI= CYCLONIC UP TO 12, W TO NW 7-8 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 12-14 M, 4-6 M LATER. SWELL E 7M, 3-5 M IN E LATER. =
PRATAS= NW 4-5, BEC 6-7. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA 2 M, 3-4 M LATER. SWELL E 2 M, SW 2 M. =
BALINTANG= W TO NW 9-10, SW UP TO 12. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 6-8 M, UP TO 14 M. SWELL E 5-7 M, 7 M IN E. =
SCARBOROUGH= W TO SW 6-7, OCNL 8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL NE 2 M, SW 2 M. =
PARACEL= W TO SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL S TO SW 2 M. =
TONKIN= W TO SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= W TO SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL S 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 03:30 HKT 24/Aug/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 24 August 2019

    Warnings:
    Strong winds in Nan'ao and Shanwei.

    Weather Situation:
    At 3 a.m., Severe Tropical Storm Bailu with maximum sustained winds of about 105 kilometres per hour near its centre was located at 20.7 degrees north, 123.3 degrees east. It is forecast to move northwest at about 28 kilometres per hour towards the vicinity of southern part of Taiwan.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North to northwest force 3 to 4.
    Isolated squally showers and thunderstorms, some haze.
    Slight to moderate seas.

    Nan'ao:
    North to northwest force 4 to 5, becoming force 6 to 7.
    Scattered squally showers and thunderstorms.
    Moderate seas, becoming rough.

    Shanwei:
    North to northwest force 4 to 5, becoming force 6.
    Scattered squally showers and thunderstorms.
    Moderate seas, becoming rough.

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

    Outlook for the next 48 hours
    West to southwesterly winds of force 5 to 6, cyclonic winds of up to force 10 in east at first. Frequent heavy squally showers and thunderstorms.

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

    Waglan Island Wind north-northwest force 1
      Visibility 46 Kilometres

    Shantou Wind west-northwest force 2
      Visibility 16 Kilometres

    Dongsha Wind north-northwest force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind north-northwest force 1

    Macau Wind south-southwest force 1
      Visibility 15 Kilometres

    Xisha Wind west-southwest force 2
      Visibility 30 Kilometres

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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 24/AUG/2019
    (Next update at 9:00-9:30 HKT 24/AUG/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     TROPICAL CYCLONE BAILU IS EXPECTED TO AFFECT THE VICINITY
     OF THE SOUTHERN PART OF TAIWAN TO THE COAST OF 
     SOUTHEASTERN CHINA TODAY. UNDER THE INFLUENCE OF ITS OUTER
     SUBSIDING AIR, THE WEATHER WILL BE VERY HOT OVER GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  VRB/5-10
                  BEC 320/10
       OFFSHORE:  040/10                               28-35
   B.   2000 FT:  020/5-10                             25
   C.   5000 FT:  070/14                               21
   D.  10000 FT:  080/20                               12
   E.  18000 FT:  080/20                               MS1
   F.  24000 FT:  080/20                               MS12
   G.  30000 FT:  080/30                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY, SUNNY PERIODS WITH LOCALIZED HAZE DURING THE DAY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT
   K. VISIBILITY    : 10 KM, TEMPO 4000 M IN HAZE.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 11200 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 28 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE WEST TO NORTHWESTERLIES.  SUNNY PERIODS DURING THE DAY.
     A FEW SHOWERS AND ISOLATED SQUALLY THUNDERSTORMS LATER. =

    ===================================================================
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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    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

    Tropical Cyclone Warning |  Track and Positions of Tropical Cyclones
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    Bulletin issued at 03:30 HKT 24/Aug/2019


    Tropical Cyclone Warning

    At 231800 UTC, Severe Tropical Storm Bailu (1911) with central pressure 980 hectopascals was centred within 90 nautical miles of two zero point five degrees north (20.5 N) one two three point six degrees east (123.6 E) and is forecast to move northwest at about 15 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 55 knots.

    Radius of over 33 knot winds 90 nautical miles.
    Radius of over 47 knot winds 60 nautical miles.
    Radius of over 2 metre waves 300 nautical miles.

    Forecast position and intensity at 241800 UTC
    Two three point seven degrees north (23.7 N)
    One one seven point seven degrees east (117.7 E)
    Maximum winds 60 knots.

    Forecast position and intensity at 251800 UTC
    Two five point five degrees north (25.5 N)
    One one three point eight degrees east (113.8 E)
    Maximum winds 30 knots.

    Forecast position and intensity at 261800 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 24/Aug/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.4 C
Minimum Air Temperature                     28.2 C
Grass Minimum Temperature                   27.4 C
Relative Humidity                        72 - 87 Percent
Rainfall                                     0.7 mm 
Total rainfall since 1st January          1706.6 mm
Against an average of                     1812.9 mm

Other Stations                Min                  Max
King's Park                  27.7 C               31.0 C
Wong Chuk Hang               26.3 C               30.7 C
Ta Kwu Ling                  26.2 C               32.4 C
Lau Fau Shan                 26.2 C               31.6 C
Tai Po                       27.1 C               32.3 C
Sha Tin                      27.2 C               33.0 C
Tuen Mun                     26.5 C               30.2 C
Tseung Kwan O                26.1 C               32.8 C
Sai Kung                     27.3 C               33.7 C
Cheung Chau                  26.2 C               33.5 C
Chek Lap Kok                 26.8 C               32.3 C
Tsing Yi                     26.7 C               31.7 C
Shek Kong                    25.7 C               32.4 C
Tsuen Wan Ho Koon            24.9 C               29.4 C
Tsuen Wan Shing Mun Valley   25.3 C               32.2 C
Hong Kong Park               27.1 C               31.5 C
Shau Kei Wan                 26.9 C               31.9 C
Kowloon City                 27.6 C               31.6 C
Happy Valley                 27.4 C               31.9 C
Wong Tai Sin                 27.7 C               32.4 C
Stanley                      27.0 C               32.8 C
Kwun Tong                    27.5 C               32.6 C
Sham Shui Po                 27.8 C               32.2 C
Kai Tak Runway Park          26.9 C               31.3 C
Yuen Long Park               26.4 C               32.8 C
Tai Mei Tuk               27.1 C               34.3 C

Duration of sunshine (King's Park):              3.8 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.
 

Yesterday's (23 Aug 2019) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 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                         0.11
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                        0.14

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 23 Aug
     2003copy right image | Important notices | Privacy policy Last revision date: <24 Aug 2019> 

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