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Bulletin issued at 01:02 HKT 26/Aug/2019

At 1 a.m. at the Hong Kong Observatory the air temperature was 24 degrees Celsius and the relative humidity 96 per cent.

Gusts reaching 70 kilometres per hour or above may continue to affect Hong Kong.

Please be reminded that:

The Red Rainstorm Warning Signal has been issued.
The Thunderstorm Warning has been issued. It will remain effective until 2:00 a.m. today. Squally thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

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

Between 11:45 p.m. and 0:45 a.m., lightning was detected over all regions. The rainfall recorded in various regions were:

Islands District 0 to 61 mm;
Tsuen Wan 27 to 61 mm;
Kwai Tsing 35 to 54 mm;
Sha Tin 38 to 54 mm;
Sai Kung 0 to 52 mm;
Kwun Tong 20 to 39 mm;
Central & Western District 26 to 38 mm;
Tai Po 9 to 35 mm;
Wong Tai Sin 27 to 35 mm;
Wan Chai 17 to 32 mm;
Kowloon City 26 to 31 mm;
Southern District 5 to 30 mm;
Eastern District 7 to 28 mm;
Yau Tsim Mong 21 to 23 mm;
Sham Shui Po 19 to 22 mm;
Tuen Mun 1 to 15 mm;
Yuen Long 0 to 14 mm;
North District 1 to 12 mm.


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


Climatological Information for 26 Aug

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 01:05 HKT 26/Aug/2019

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

Tropical Cyclone Bailu made landfall over the coast of southeastern China yesterday morning, then crossed southeastern China and weakened progressively from a severe tropical storm into a tropical depression. Under the influence of Bailu, there were occasional heavy squally showers and thunderstorms over Guangdong yesterday. More than 50 millimetres of rainfall were recorded over most parts of the territory and more than 4000 cloud-to-ground lightning strokes were recorded in Hong Kong. Bailu is expected to dissipate gradually today. With an anticyclone aloft strengthening, the weather will improve gradually over southern China in the next couple of days. It will be very hot midweek this week.

At 11 p.m. last night, Bailu was centred about 180 kilometres north-northeast of Guangzhou. It is forecast to move west-northwest at about 20 kilometres per hour further inland and dissipate gradually.

Weather forecast for Hong Kong

Cloudy with showers and squally thunderstorms. Showers will be heavy at times at first. Showers will ease off with sunny intervals during the day. Temperatures will range between 23 and 31 degrees. Moderate to fresh southwesterly winds, occasionally strong offshore and on high ground at first.

Outlook : Mainly fine and becoming very hot in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 26/08/2019; 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 25/Aug/2019

N0 WARNING.

GENERAL SITUATION AT 250900 UTC:
FOR DETAILS ON TROPICAL DEPRESSION BAILU (1911) , PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 251300 UTC:

HONG KONG= S TO SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 3 M. TEMP 26-31 C. =
KWANGTUNG= S TO SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 3 M. =
TAIWAN STRAIT= S TO SW 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL SW 3 M. =
BASHI= S TO SE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 3 M, SE 2 M. =
PRATAS= S TO SW 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 3 M. =
BALINTANG= S TO SE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 3 M, SE 2 M. =
SCARBOROUGH= S TO SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 3 M, NE 2 M. =
PARACEL= S TO SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 3 M. =
TONKIN= S TO SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= S 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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    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 23:40 HKT 25/Aug/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:40 p.m. on 25 August 2019

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

    Weather Situation:
    At 11 p.m., Tropical Depression Bailu with maximum sustained winds of about 45 kilometres per hour near its centre was located at 24.8 degrees north, 113.7 degrees east. It is forecast to move west-northwest at about 20 kilometres per hour further inland and dissipate gradually.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South to southwest force 5 to 6, becoming southeast force 4 to 5 later.
    Scattered heavy squally showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao:
    South to southwest force 5 to 6, becoming southeast force 4 to 5 later.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas.

    Shanwei and South of Hong Kong:
    South to southwest force 5 to 6, becoming southeast force 4 to 5 later.
    Scattered heavy squally showers and thunderstorms.
    Moderate to rough seas.

    Shangchuan Dao:
    South to southwest force 4 to 5, becoming southeast force 4 to 5 later.
    Scattered heavy squally showers and thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    South to southeasterly winds of force 5 to 6. Isolated showers and thunderstorms.

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

    Waglan Island Wind southwest force 5 with gusts to force 8
      Visibility 670 Metres

    Shantou Wind south force 2
      Visibility 24 Kilometres

    Huangmaozhou Wind south-southwest force 5

    Macau Wind south force 2
      Visibility 5000 Metres in showers

    Xisha Wind south-southwest force 3
      Visibility 25 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 26/AUG/2019
    (Next update at 9:00-9:30 HKT 26/AUG/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, TROPICAL DEPRESSION BAILU
     WAS CENTRED AT 24.8 DEGREES NORTH, 113.7 DEGREES
     EAST AND IS FORECAST TO MOVE WEST-NORTHWEST AT
     ABOUT 11 KNOTS AND DISSIPATE GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  200/10-15
                  TEMPO VRB/25G35 IN TS
       OFFSHORE:  200/15-20, OCNL 25                   25-32
   B.   2000 FT:  210/25-30                            25
   C.   5000 FT:  210/25-30, OCNL 35                   21
   D.  10000 FT:  210/20-25                            11
   E.  18000 FT:  210/25-30                            MS1
   F.  24000 FT:  180/20-25                            MS10
   G.  30000 FT:  150/15-20                            MS22
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      CLOUDY WITH SHOWERS AND SQUALLY THUNDERSTORMS
      AT FIRST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 3500 FT  
      TEMPO FEW CB 1000 FT SCT 2000 FT  BKN 4000 FT
   K. VISIBILITY    : 7 KM. TEMPO 3000 M IN SHOWERS. TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 11200 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS, OFFSHORE AND  NEAR HILLS.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH SOUTH TO SOUTHWESTERLY WINDS.
     SUNNY INTERVALS DURING THE DAY. 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.

    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 22:31 HKT on 25 Aug 19

    VHHK SIGMET 4 VALID 251430/251830 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2135 E11143 - N2207 E11258 - N2311 E11649 - N2149 E11544 - N2104 E11206 - N2135 E11143 TOP FL430 MOV NE 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 21:30 HKT 25/Aug/2019


    Tropical Cyclone Warning

    At 251200 UTC, Tropical Depression Bailu (1911) with central pressure 998 hectopascals was centred within 60 nautical miles of two four point eight degrees north (24.8 N) one one four point four degrees east (114.4 E) and is forecast to weaken and move northwest at about 10 knots for the next 12 hours.

    Maximum winds near the centre are estimated to be 25 knots.

    Radius of over 2 metre waves 150 nautical miles over southeast quadrant, 90 nautical miles elsewhere.

    No further warnings on this Tropical Depression will be issued by the Hong Kong Observatory unless re-intensification takes place.

    Forecast position and intensity at 260000 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 26/Aug/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.6 C
Minimum Air Temperature                     25.1 C
Grass Minimum Temperature                   24.5 C
Relative Humidity                        82 - 96 Percent
Rainfall                                    88.4 mm 
Total rainfall since 1st January          1795.0 mm
Against an average of                     1847.6 mm

Other Stations                Min                  Max
King's Park                  24.2 C               32.0 C
Wong Chuk Hang               24.5 C               32.9 C
Ta Kwu Ling                  24.4 C               32.6 C
Lau Fau Shan                 24.1 C               32.5 C
Tai Po                       23.8 C               33.0 C
Sha Tin                      24.8 C               34.4 C
Tuen Mun                     24.6 C               33.1 C
Tseung Kwan O                24.2 C               32.4 C
Sai Kung                     24.9 C               34.6 C
Chek Lap Kok                 25.7 C               33.1 C
Tsing Yi                     25.0 C               33.5 C
Tsuen Wan Ho Koon            23.4 C               32.1 C
Tsuen Wan Shing Mun Valley   24.3 C               32.0 C
Hong Kong Park               24.8 C               32.6 C
Shau Kei Wan                 24.6 C               33.3 C
Kowloon City                 24.0 C               32.8 C
Happy Valley                 25.5 C               33.2 C
Wong Tai Sin                 24.6 C               33.3 C
Stanley                      24.1 C               32.6 C
Kwun Tong                    24.4 C               33.2 C
Sham Shui Po                 24.6 C               32.9 C
Kai Tak Runway Park          24.5 C               33.1 C
Yuen Long Park               24.7 C               33.1 C
Tai Mei Tuk               24.2 C               33.2 C

Duration of sunshine (King's Park):              0 H
The mean UV index recorded at King's Park yesterday was 0.6,
the UV intensity was Low.
The maximum UV index for yesterday was 2.
 

Yesterday's (25 Aug 2019) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.10 to
0.16 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                           0.10
Tap Mun                             0.10
Kat O                               0.11
Yuen Ng Fan                         0.13
Tai Mei Tuk                         0.12
Sha Tau Kok                         0.11
Kwun Tong                           0.14
Sai Wan Ho                          0.11
King's Park                         0.16
Tsim Bei Tsui                       0.14
Cape D'Aguilar                      0.14
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 25 Aug
     2003copy right image | Important notices | Privacy policy Last revision date: <26 Aug 2019> 

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