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Bulletin issued at 06:02 HKT 05/Sep/2019

At 6 a.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 97 per cent.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 7:00 a.m. today. Isolated thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

King's Park 25 degrees;
Wong Chuk Hang 25 degrees;
Ta Kwu Ling 25 degrees;
Lau Fau Shan 25 degrees;
Tai Po 26 degrees;
Sha Tin 25 degrees;
Tuen Mun 25 degrees;
Tseung Kwan O 25 degrees;
Sai Kung 25 degrees;
Cheung Chau 25 degrees;
Chek Lap Kok 26 degrees;
Tsing Yi 25 degrees;
Shek Kong 26 degrees;
Tsuen Wan Ho Koon 24 degrees;
Tsuen Wan Shing Mun Valley 25 degrees;
Shau Kei Wan 25 degrees;
Kowloon City 24 degrees;
Happy Valley 25 degrees;
Wong Tai Sin 25 degrees;
Stanley 25 degrees;
Kwun Tong 25 degrees;
Sham Shui Po 25 degrees;
Kai Tak Runway Park 25 degrees;
Yuen Long Park 26 degrees;
Tai Mei Tuk 25 degrees.

Between 4:45 and 5:45 a.m., the rainfall recorded in various regions were:

Wong Tai Sin 7 to 26 mm;
Sha Tin 4 to 18 mm;
Tsuen Wan 0 to 16 mm;
Kwai Tsing 3 to 13 mm;
Tai Po 0 to 13 mm;
Sai Kung 1 to 12 mm;
Sham Shui Po 3 to 11 mm;
Kowloon City 1 to 8 mm;
Kwun Tong 3 to 7 mm;
Yau Tsim Mong 0 to 6 mm;
Yuen Long 0 to 5 mm;
Tuen Mun 1 to 3 mm;
Central & Western District 0 to 1 mm;
Eastern District 0 to 1 mm;
Southern District 0 to 1 mm.


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


Climatological Information for 5 Sep

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

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Bulletin updated at 05:45 HKT 05/Sep/2019

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

The broad trough of low pressure over the northern part of the South China Sea is bringing showers to the coast of Guangdong. Locally, more than 20 millimetres of rainfall were recorded over parts of the territory this morning.

At 5 a.m., Severe Typhoon Lingling was centred about 540 kilometres east-northeast of Gaoxiong. It is forecast to move north at about 12 kilometres per hour across the seas east of Taiwan.

Weather forecast for today

Mainly cloudy with occasional showers. A few thunderstorms at first. The maximum temperature will be about 29 degrees. Moderate easterly winds.

Outlook : Showers will ease off tomorrow. Mainly fine during the weekend.


(The above forecast period is valid up to 23:59 HKT today, 05/09/2019; 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 04/Sep/2019

GALE WARNING AREA: BASHI.

GENERAL SITUATION AT 040900 UTC:
A SOUTHWESTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 041300 UTC:

HONG KONG= E 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. TEMP 25-29 C. =
KWANGTUNG= E TO SE 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2-3 M. =
TAIWAN STRAIT= NE 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
BASHI= W TO SW 6-7, UP TO 8 AT FIRST. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 6 M AT FIRST. SWELL SW 3 M, E TO NE 3-5 M. =
PRATAS= S TO SW 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL SW 3 M, E TO NE 3 M. =
BALINTANG= W TO SW 6-7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SW 3 M, E TO NE 3-5 M. =
SCARBOROUGH= S TO SW 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 NE 3 M. =
PARACEL= S TO SW 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL SW 3 M. =
TONKIN= E TO NE 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. =
DANANG= S TO SW 5-6, OCNL 7. DOWN TO 2000 M IN SCT 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.


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    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

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    Bulletin issued at 05:30 HKT 05/Sep/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 05 September 2019

    Warnings:
    Strong winds in Nan'ao, Shanwei, south of Hong Kong and Shangchuan Dao.

    Weather Situation:
    The broad trough of low pressure over the northern part of the South China Sea is bringing unsettled weather to the south China coastal waters.

    At 5 a.m., Severe Typhoon Lingling with maximum sustained winds of about 155 kilometres per hour near its centre was located at 23.8 degrees north, 125.4 degrees east. It is forecast to move north 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 4 to 5.
    Occasional showers and squally thunderstorms.
    Moderate seas.

    Nan'ao:
    East to northeast force 5 to 6.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

    Shanwei:
    East force 5 to 6.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

    South of Hong Kong and Shangchuan Dao:
    East to southeast force 5 to 6.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    East to southeasterly winds of force 5 to 6, becoming northeasterly winds of force 5 to 6. Scattered squally showers and thunderstorms.

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

    Waglan Island Wind north-northeast force 1
      Visibility 17 Kilometres

    Shantou Wind east-northeast force 2
      Visibility 30 Kilometres in rain

    Dongsha Wind southeast force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 4

    Macau Wind east force 3
      Visibility 25 Kilometres

    Xisha Wind south-southwest force 4
      Visibility 6 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 05/SEP/2019
    (Next update at 9:00-9:30 HKT 05/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 WAS
     CENTRED AT 23.3 DEGREES NORTH, 125.4 DEGREES
     EAST AND IS FORECAST TO MOVE NORTH AT ABOUT 6
     KNOTS ACROSS THE SEAS EAST OF TAIWAN.
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:  080/20-25                            25-30
   B.   2000 FT:  100/20 OCNL 25                       22
   C.   5000 FT:  090/25                               18
   D.  10000 FT:  110/15                               11
   E.  18000 FT:  070/10                               MS2
   F.  24000 FT:  150/5                                MS11
   G.  30000 FT:  250/10                               MS22
   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 3000 FT
      TEMPO FEW CB 1000 FT SCT 2000 FT BKN 4000 FT
   K. VISIBILITY    : 9 KM. TEMPO 4000 M IN SHOWERS. TEMPO 2000 M IN TS
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 10600 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS, OFFSHORE AND  NEAR HILLS
   N. SEA STATE     : 3.0-4.0 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS. MAINLY CLOUDY WITH
     OCCASIONAL 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.

    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 03:46 HKT on 05 Sep 19

    VHHK SIGMET 5 VALID 041945/042345 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1753 E11256 - N1930 E11130 - N2130 E11130 - N2400 E11730 - N2104 E11730 - N1753 E11256 TOP FL410 STNR 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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    Bulletin issued at 15:31 HKT 04/Sep/2019


    Tropical Cyclone Warning

    At 040600 UTC, Typhoon Lingling (1913) with central pressure 965 hectopascals was centred within 60 nautical miles of two two point four degrees north (22.4 N) one two five point one degrees east (125.1 E) and is forecast to move north 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.

    No further warnings on this Typhoon will be issued by the Hong Kong Observatory unless it re-enters the Hong Kong area of responsibility.

    Forecast position and intensity at 050600 UTC
    Two four point eight degrees north (24.8 N)
    One two five point five degrees east (125.5 E)
    Maximum winds 80 knots.

    Forecast position and intensity at 060600 UTC
    Two nine point one degrees north (29.1 N)
    One two four point nine degrees east (124.9 E)
    Maximum winds 90 knots.

    Forecast position and intensity at 070600 UTC
    Three six point four degrees north (36.4 N)
    One two five point zero degrees east (125.0 E)
    Maximum winds 75 knots.

    Forecast position and intensity at 080600 UTC
    Become extratropical low.

    Bulletin issued at 09:30 HKT 04/Sep/2019


    Tropical Cyclone Warning

    At 040000 UTC, Tropical Depression Kajiki (1914) has weakened into an area of low pressure.

    No further warnings on this area of low pressure will be issued by the Hong Kong Observatory unless re-intensification takes place.



    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 05/Sep/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     28.3 C
Minimum Air Temperature                     25.5 C
Grass Minimum Temperature                   24.7 C
Relative Humidity                        82 - 98 Percent
Rainfall                                    62.2 mm 
Total rainfall since 1st January          2156.3 mm
Against an average of                     1949.0 mm

Other Stations                Min                  Max
King's Park                  25.2 C               29.1 C
Wong Chuk Hang               25.4 C               28.6 C
Ta Kwu Ling                  25.2 C               29.7 C
Lau Fau Shan                 24.7 C               29.2 C
Tai Po                       24.9 C               27.8 C
Sha Tin                      25.5 C               29.3 C
Tuen Mun                     24.8 C               29.5 C
Tseung Kwan O                25.0 C               27.6 C
Sai Kung                     26.2 C               28.9 C
Cheung Chau                  25.0 C               28.1 C
Chek Lap Kok                 24.7 C               30.5 C
Tsing Yi                     25.2 C               29.8 C
Shek Kong                    25.4 C               29.2 C
Tsuen Wan Ho Koon            24.5 C               27.7 C
Tsuen Wan Shing Mun Valley   25.2 C               29.0 C
Shau Kei Wan                 24.8 C               27.5 C
Kowloon City                 25.2 C               28.5 C
Happy Valley                 25.9 C               29.2 C
Wong Tai Sin                 25.5 C               28.6 C
Stanley                      25.3 C               28.5 C
Kwun Tong                    25.3 C               28.4 C
Sham Shui Po                 25.1 C               31.1 C
Kai Tak Runway Park          25.7 C               28.4 C
Yuen Long Park               25.3 C               29.9 C
Tai Mei Tuk               24.8 C               29.4 C

Duration of sunshine (King's Park):              1.4 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 10.
 

Yesterday's (04 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                         0.12
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                        0.13

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 04 Sep
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