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Bulletin issued at 03:26 HKT 04/Sep/2019

At 3 a.m. at the Hong Kong Observatory the air temperature was 26 degrees Celsius and the relative humidity 96 per cent.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 6:30 a.m. today. A few squally thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

King's Park 25 degrees;
Wong Chuk Hang 26 degrees;
Ta Kwu Ling 26 degrees;
Lau Fau Shan 25 degrees;
Tai Po 26 degrees;
Sha Tin 27 degrees;
Tuen Mun 26 degrees;
Tseung Kwan O 25 degrees;
Sai Kung 27 degrees;
Cheung Chau 25 degrees;
Chek Lap Kok 27 degrees;
Tsing Yi 26 degrees;
Shek Kong 26 degrees;
Shau Kei Wan 26 degrees;
Kowloon City 26 degrees;
Kwun Tong 26 degrees;
Sham Shui Po 26 degrees;
Kai Tak Runway Park 26 degrees.

Between 1:45 and 2:45 a.m., the rainfall recorded in various regions were:

Southern District 6 to 18 mm;
Kwun Tong 1 to 12 mm;
Sai Kung 1 to 11 mm;
Kowloon City 2 to 9 mm;
Eastern District 2 to 8 mm;
Islands District 0 to 7 mm;
Yau Tsim Mong 4 to 7 mm;
Tai Po 0 to 6 mm;
Central & Western District 1 to 5 mm;
Wan Chai 2 to 3 mm;
Yuen Long 0 to 3 mm;
Wong Tai Sin 1 to 3 mm;
Sham Shui Po 1 to 3 mm;
North District 0 to 2 mm;
Tsuen Wan 0 to 1 mm;
Sha Tin 0 to 1 mm;
Kwai Tsing 0 to 1 mm.

Here is the information on Typhoon Lingling at 3 a.m.:
Location: 21.9 degrees north, 124.2 degrees east.

Here is the information on Tropical Depression Kajiki at 3 a.m.:
Location: 16.8 degrees north, 108.3 degrees east.


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


Climatological Information for 4 Sep

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 02:45 HKT 04/Sep/2019

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

Showers are affecting the northern part of the South China Sea and the coast of Guangdong.

At 2 a.m., Tropical Depression Kajiki was centred about 90 kilometres north of Da Nang. It is forecast to be slow moving, lingering over the vicinity of the coast of central Vietnam. Meanwhile, Typhoon Lingling was centred about 420 kilometres east-southeast of Gaoxiong. It is forecast to move north-northeast at about 12 kilometres per hour across the seas east of Taiwan.

Weather forecast for today

Mainly cloudy with occasional showers and a few squally thunderstorms. Showers will be heavy at times. Temperatures will range between 25 and 29 degrees. Moderate to fresh easterly winds.

Outlook : There will be showers and squally thunderstorms in the following couple of days. The weather will improve over the weekend.


(The above forecast period is valid up to 23:59 HKT today, 04/09/2019; 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 03/Sep/2019

STORM WARNING AREA: BASHI.
GALE WARNING AREA: BALINTANG.

GENERAL SITUATION AT 030900 UTC:
FOR DETAILS ON SEVERE TROPICAL STORM LINGLING (1913) AND TROPICAL DEPRESSION KAJIKI (1914), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 031300 UTC:

HONG KONG= E 5-6, OCNL 7. ISOL SHOWERS AND SQUALLY TS. SEA UP TO 4 M. SWELL SW 2-3 M, E TO SE 2-3 M. TEMP 25-29 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 SW 2-3 M, E TO SE 2-3 M. =
TAIWAN STRAIT= NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SW 2-3 M, E TO SE 2-3 M. =
BASHI= N TO NW 10-11, 8-9 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 10-12 M, 6-8 M LATER. SWELL SW 3-5 M, E TO NE 5-6 M. =
PRATAS= E TO SE 6-7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SW 3-5 M, E TO SE 3-5 M. =
BALINTANG= W TO SW 8-9. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 6-8 M. SWELL SW 3-5 M, E TO NE 3-5 M. =
SCARBOROUGH= S TO SW 6-7. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SW 2-3 M, E TO NE 3-5 M. =
PARACEL= S TO SW 6-7. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SW 2-3 M, E TO SE 2-3 M. =
TONKIN= E TO NE 6-7. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M. =
DANANG= CYCLONIC 6-7. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 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
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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 04/Sep/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 04 September 2019

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    At 3 a.m., Tropical Depression Kajiki with maximum sustained winds of about 55 kilometres per hour near its centre was located at 16.8 degrees north, 108.3 degrees east. It is forecast to be slow moving, lingering over the vicinity of the coast of central Vietnam. Meanwhile, Typhoon Lingling with maximum sustained winds of about 130 kilometres per hour near its centre was located at 21.9 degrees north, 124.2 degrees east. It is forecast to move north-northeast at about 12 kilometres per hour across the seas east of Taiwan.

    Area forecasts for the next 24 hours

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

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

    Shangchuan Dao:
    East to southeast force 6 to 7.
    Frequent heavy squally showers and thunderstorms.
    Rough seas.

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

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

    Waglan Island Wind east force 5
      Visibility 38 Kilometres

    Shantou Wind east-southeast force 1
      Visibility 30 Kilometres

    Dongsha Wind southeast force 3
      Visibility 9 Kilometres in rain

    Huangmaozhou Wind east force 6

    Macau Wind northeast force 3
      Visibility 35 Kilometres

    Xisha Wind south-southwest force 4
      Visibility 9 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 01:30 HKT 04/SEP/2019
    (Next update at 9:00-9:30 HKT 04/SEP/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB. 
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AT 11 P.M. LAST NIGHT, TYPHOON LINGLING LOCATED
     AT 21.5 DEGREES NORTH, 124.2 DEGREES EAST WAS
     FORECAST TO MOVE NORTH-NORTHEAST AT ABOUT 6
     KNOTS ACROSS THE SEAS EAST OF TAIWAN. MEANWHILE,
     TROPICAL DEPRESSION KAJIKI LOCATED AT 16.7
     DEGREES NORTH, 108.4 DEGREES EAST WAS FORECAST
     TO BE SLOW MOVING, LINGERING OVER THE VICINITY
     OF THE COAST OF CENTRAL VIETNAM.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  080/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  070/20-25                            25-29
   B.   2000 FT:  100/20-25                            23
   C.   5000 FT:  080/30                               18
   D.  10000 FT:  100/30                               10
   E.  18000 FT:  110/25                               MS4
   F.  24000 FT:  140/15                               MS15
   G.  30000 FT:  300/10                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH OCCASIONAL SHOWERS AND A FEW
      SQUALLY THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT SCT 2500 FT
      TEMPO FEW CB 1000 FT SCT 2000 FT BKN 4000 FT
   K. VISIBILITY    : 9 KM. TEMPO 3000 M IN SHOWERS. TEMPO 2000 M IN TS
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EASTERLY WINDS. MAINLY CLOUDY
     WITH OCCASIONAL SHOWERS AND A FEW SQUALLY
     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.

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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 03:40 HKT on 04 Sep 19

    VHHK SIGMET 4 VALID 031545/031945 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2050 E11722 - N1642 E11400 - N1930 E11130 - N2130 E11130 - N2243 E11425 - N2244 E11428 - N2050 E11722 TOP FL480 MOV W 10KT NC= VHHK SIGMET 5 VALID 031945/032345 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1642 E11400 - N1930 E11130 - N2154 E11130 - N2307 E11635 - N2102 E11730 - N2100 E11730 TOP FL480 MOV W 10KT NC=

    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.

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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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    Severe Weather Information Centre

    Bulletin issued at 03:31 HKT 04/Sep/2019


    Tropical Cyclone Warning

    At 031800 UTC, Typhoon Lingling (1913) with central pressure 965 hectopascals was centred within 60 nautical miles of two one point eight degrees north (21.8 N) one two four point two degrees east (124.2 E) and is forecast to move north-northeast at about 6 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 70 knots.

    Radius of over 33 knot winds 120 nautical miles.
    Radius of over 47 knot winds 60 nautical miles.
    Radius of over 63 knot winds 30 nautical miles.
    Radius of over 2 metre waves 240 nautical miles.

    Forecast position and intensity at 041800 UTC
    Two three point five degrees north (23.5 N)
    One two five point three degrees east (125.3 E)
    Maximum winds 80 knots.

    Forecast position and intensity at 051800 UTC
    Two six point two degrees north (26.2 N)
    One two five point two degrees east (125.2 E)
    Maximum winds 90 knots.

    Forecast position and intensity at 061800 UTC
    Three one point seven degrees north (31.7 N)
    One two four point four degrees east (124.4 E)
    Maximum winds 90 knots.

    Forecast position and intensity at 071800 UTC
    Three nine point three degrees north (39.3 N)
    One two six point one degrees east (126.1 E)
    Maximum winds 55 knots.

    Forecast position and intensity at 081800 UTC
    Become extratropical low.

    Bulletin issued at 03:30 HKT 04/Sep/2019


    Tropical Cyclone Warning

    At 031800 UTC, Tropical Depression Kajiki (1914) with central pressure 996 hectopascals was centred within 90 nautical miles of one six point eight degrees north (16.8 N) one zero eight point three degrees east (108.3 E) and is forecast to be slow moving 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.

    Forecast position and intensity at 041800 UTC
    One seven point eight degrees north (17.8 N)
    One zero nine point one degrees east (109.1 E)
    Maximum winds 25 knots.

    Forecast position and intensity at 051800 UTC
    One nine point one degrees north (19.1 N)
    One one two point zero degrees east (112.0 E)
    Maximum winds 25 knots.

    Forecast position and intensity at 061800 UTC
    Two zero point six degrees north (20.6 N)
    One one five point two degrees east (115.2 E)
    Maximum winds 25 knots.

    Forecast position and intensity at 071800 UTC
    Dissipated over sea.



    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 04/Sep/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     30.9 C
Minimum Air Temperature                     26.2 C
Grass Minimum Temperature                   26.0 C
Relative Humidity                        70 - 95 Percent
Rainfall                                    12.9 mm 
Total rainfall since 1st January          2094.1 mm
Against an average of                     1940.1 mm

Other Stations                Min                  Max
King's Park                  26.3 C               30.7 C
Wong Chuk Hang               26.7 C               30.9 C
Ta Kwu Ling                  25.2 C               32.0 C
Lau Fau Shan                 24.2 C               30.9 C
Tai Po                       26.3 C               29.4 C
Sha Tin                      26.5 C               31.4 C
Tuen Mun                     25.7 C               31.2 C
Tseung Kwan O                25.4 C               30.3 C
Sai Kung                     26.0 C               29.9 C
Cheung Chau                  25.2 C               29.7 C
Chek Lap Kok                 26.4 C               32.7 C
Tsing Yi                     25.9 C               31.9 C
Shek Kong                    25.8 C               31.2 C
Tsuen Wan Ho Koon            25.6 C               30.1 C
Tsuen Wan Shing Mun Valley   25.7 C               30.6 C
Shau Kei Wan                 24.6 C               29.6 C
Kowloon City                 25.5 C               30.5 C
Happy Valley                 26.3 C               31.8 C
Wong Tai Sin                 25.9 C               30.9 C
Stanley                      26.4 C               30.6 C
Kwun Tong                    25.7 C               30.3 C
Sham Shui Po                 25.5 C               32.1 C
Kai Tak Runway Park          26.1 C               30.3 C
Yuen Long Park               25.5 C               32.1 C
Tai Mei Tuk               26.5 C               29.8 C

Duration of sunshine (King's Park):              5.9 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 11.
 

Yesterday's (03 Sep 2019) 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                           0.08
Tap Mun                             0.08
Kat O                               0.10
Yuen Ng Fan                         0.13
Tai Mei Tuk                         0.11
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                      0.12
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 03 Sep
     2003copy right image | Important notices | Privacy policy Last revision date: <04 Sep 2019> 

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