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Bulletin issued at 23:02 HKT 29/Jul/2019

At 11 p.m. at the Hong Kong Observatory the air temperature was 28 degrees Celsius and the relative humidity 82 per cent.

The air temperatures at other places were:

King's Park 27 degrees;
Wong Chuk Hang 28 degrees;
Ta Kwu Ling 27 degrees;
Lau Fau Shan 27 degrees;
Tai Po 28 degrees;
Sha Tin 28 degrees;
Tuen Mun 28 degrees;
Tseung Kwan O 27 degrees;
Sai Kung 28 degrees;
Cheung Chau 27 degrees;
Chek Lap Kok 29 degrees;
Tsing Yi 28 degrees;
Shek Kong 28 degrees;
Tsuen Wan Ho Koon 27 degrees;
Tsuen Wan Shing Mun Valley 28 degrees;
Hong Kong Park 28 degrees;
Shau Kei Wan 27 degrees;
Kowloon City 28 degrees;
Happy Valley 28 degrees;
Wong Tai Sin 28 degrees;
Stanley 27 degrees;
Kwun Tong 27 degrees;
Sham Shui Po 28 degrees;
Kai Tak Runway Park 28 degrees;
Yuen Long Park 28 degrees;
Tai Mei Tuk 27 degrees.


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


Climatological Information for 29 Jul

Regional Weather in Hong Kong

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Bulletin updated at 23:15 HKT 29/Jul/2019

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

Showers affected the northern part of the South China Sea and the coast of Guangdong today. Locally, it was mainly cloudy today with sunny intervals during the day. There were also a few showers and isolated thunderstorms. More than 10 millimetres of rainfall were recorded over North District, Sha Tin and Sai Kung. The area of low pressure now over the central part of the South China Sea will develop gradually and may develop into a tropical cyclone in the next couple of days. It will move towards the vicinity of western Guangdong to Hainan Island in the middle and latter parts of this week. The associated heavy squally showers and thunderstorms will affect the coast of Guangdong. It will be windy over the region.

Weather forecast for Hong Kong (Tuesday, 30 Jul 2019)

Mainly cloudy with a few showers and isolated thunderstorms. Sunny intervals during the day. Temperatures will range between 27 and 32 degrees. Moderate to fresh easterly winds, occasionally strong offshore.

Outlook : Windy with heavy squally showers in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 30/07/2019; 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 21:00 HKT 29/Jul/2019

N0 WARNING.

GENERAL SITUATION AT 290900 UTC:
LOW 1004 HPA 17N 116E N SLOWLY INTST NC.

MARINE FORECAST FOR 24 HOURS FROM 291300 UTC:

HONG KONG= E 5-6. SHOWERS AND TS. SEA 2-3 M. TEMP 27-32 C. =
KWANGTUNG= E TO SE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. =
TAIWAN STRAIT= SE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. =
BASHI= E TO SE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. =
PRATAS= E TO SE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. =
BALINTANG= E TO SE 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. =
SCARBOROUGH= S TO SE 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
PARACEL= E 4-5, NE 6 LATER. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M, 3 M LATER. SWELL SW 2 M. =
TONKIN= SE 4-5, NW 4-5 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= SE 4-5, NW 4-5 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 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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  • Tidal Information

    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

    Current Weather | Local Weather Forecast | Regional Temperature Forecast in HK
    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 23:30 HKT 29/Jul/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 29 July 2019

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    An area of low pressure located near 17 degrees north, 116 degrees east is bringing unsettled weather to the region and may develop into a tropical cyclone in the next couple of days. It will move towards the vicinity of western Guangdong to Hainan Island in the middle and latter parts of this week.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 5 to 6.
    Showers and thunderstorms.
    Moderate to rough seas.

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

    Shangchuan Dao:
    East force 4 to 5, becoming northeast force 6 later.
    Isolated squally showers and thunderstorms.
    Moderate seas, becoming rough seas later.

    Outlook for the next 48 hours
    East to southeasterly winds of force 6 to 7, occasionally force 8. Scattered heavy squally showers and thunderstorms.

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

    Waglan Island Wind northeast force 6
      Visibility 28 Kilometres

    Shantou Wind east force 2
      Visibility 30 Kilometres

    Dongsha Wind southeast force 1
      Visibility 10 Kilometres

    Huangmaozhou Wind northeast force 5

    Macau Wind north-northeast force 3
      Visibility 40 Kilometres

    Xisha Wind south-southeast force 1
      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 17:30 HKT 29/JUL/2019
    (Next update at 01:30 HKT 30/JUL/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     SHOWERS ARE AFFECTING THE NORTHERN PART OF THE
     SOUTH CHINA SEA AND THE COAST OF GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  090/15-20                            31-27
   B.   2000 FT:  120/15-20                            24
   C.   5000 FT:  110/20                               20
   D.  10000 FT:  130/20                               12
   E.  18000 FT:  100/20                               MS3
   F.  24000 FT:  090/15                               MS13
   G.  30000 FT:  090/20                               MS29
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH SHOWERS AND ISOLATED
      THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 6000 FT. 
      TEMPO FEW CB 1200 FT SCT 2000 FT BKN 4000 FT
   K. VISIBILITY    : 10 KM. TEMPO 3500 M IN SHOWERS. TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17000 FT      10 DEG. C LEVEL(S) : 10200 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS. MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EASTERLY WINDS, OCCASIONALLY
     STRONG OFFSHORE LATER. MAINLY CLOUDY WITH A FEW
     SHOWERS AND ISOLATED 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.

    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.

    There is no Significant Weather Information (SIGMET)

    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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     2003copy right image | Important notices | Privacy policy Last revision date: <28 Jul 2019> 
    TROPICAL CYCLONE WARNING FOR SHIPPING
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    Tropical Cyclone Warning for Shipping

    There is no tropical cyclone warning for shipping*.




    *Tropical cyclone warnings for shipping are issued by the Hong Kong Observatory for tropical cyclones located within the area bounded by 105E and 125E , 10N and 30N.




    For other tropical cyclone related information, please visit the World Meteorological Organization Web Site - Severe Weather Information Centre.

    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 29/Jul/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.3 C
Minimum Air Temperature                     28.0 C
Grass Minimum Temperature                   27.5 C
Relative Humidity                        71 - 87 Percent
Rainfall                                     0.5 mm 
Total rainfall since 1st January          1303.0 mm
Against an average of                     1439.0 mm

Other Stations                Min                  Max
King's Park                  27.2 C               31.8 C
Wong Chuk Hang               27.6 C               31.7 C
Ta Kwu Ling                  26.3 C               32.4 C
Lau Fau Shan                 24.7 C               30.6 C
Tai Po                       25.0 C               30.6 C
Sha Tin                      25.8 C               32.4 C
Tuen Mun                     25.6 C               32.4 C
Tseung Kwan O                26.8 C               32.8 C
Sai Kung                     26.6 C               32.5 C
Cheung Chau                  26.6 C               33.4 C
Chek Lap Kok                 24.0 C               32.3 C
Tsing Yi                     25.8 C               32.4 C
Shek Kong                    25.0 C               31.7 C
Tsuen Wan Ho Koon            25.3 C               29.4 C
Tsuen Wan Shing Mun Valley   25.9 C               31.4 C
Hong Kong Park               28.0 C               33.1 C
Shau Kei Wan                 27.4 C               32.7 C
Kowloon City                 27.2 C               33.7 C
Happy Valley                 28.4 C               32.8 C
Wong Tai Sin                 26.8 C               33.0 C
Stanley                      28.0 C               32.0 C
Kwun Tong                    27.9 C               33.5 C
Sham Shui Po                 25.9 C               32.9 C
Kai Tak Runway Park          27.4 C               32.8 C
Yuen Long Park               25.4 C               32.1 C
Tai Mei Tuk               25.2 C               33.1 C

Duration of sunshine (King's Park):              3.0 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 11.
 

Yesterday's (28 Jul 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                             0.09
Kat O                               0.10
Yuen Ng Fan                         0.11
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                      0.13
Chek Lap Kok                        0.12

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 28 Jul
     2003copy right image | Important notices | Privacy policy Last revision date: <29 Jul 2019> 

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