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Bulletin issued at 07:02 HKT 19/Jul/2019

At 7 a.m. at the Hong Kong Observatory the air temperature was 30 degrees Celsius and the relative humidity 88 per cent.

The air temperatures at other places were:

King's Park 29 degrees;
Wong Chuk Hang 29 degrees;
Ta Kwu Ling 28 degrees;
Lau Fau Shan 28 degrees;
Tai Po 28 degrees;
Sha Tin 30 degrees;
Tuen Mun 29 degrees;
Tseung Kwan O 29 degrees;
Sai Kung 29 degrees;
Cheung Chau 28 degrees;
Chek Lap Kok 31 degrees;
Tsing Yi 29 degrees;
Shek Kong 27 degrees;
Tsuen Wan Ho Koon 27 degrees;
Tsuen Wan Shing Mun Valley 29 degrees;
Hong Kong Park 30 degrees;
Shau Kei Wan 30 degrees;
Kowloon City 29 degrees;
Happy Valley 30 degrees;
Wong Tai Sin 30 degrees;
Stanley 29 degrees;
Kwun Tong 30 degrees;
Sham Shui Po 29 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 28 degrees;
Tai Mei Tuk 29 degrees.

Here is the information on Tropical Storm Danas at 5 a.m.:
Location: 28.4 degrees north, 124.0 degrees east.


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


Climatological Information for 19 Jul

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 06:45 HKT 19/Jul/2019

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

A southwesterly airstream is affecting the south China coast. Besides, the area of low pressure over the northeastern part of the South China Sea is bringing unsettled weather to the region.

At 5 a.m., Tropical Storm Danas was centred about 610 kilometres south-southwest of Jeju. It is forecast to move north at about 22 kilometres per hour across the East China Sea.

Weather forecast for today

Mainly cloudy with occasional showers. Isolated thunderstorms in the morning. The maximum temperature will be around 32 degrees. Moderate west to southwesterly winds.

Outlook : Brighter weather with a few showers in the next few days.


(The above forecast period is valid up to 23:59 HKT today, 19/07/2019; 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 18/Jul/2019

GALE WARNING AREAS: BASHI, BALINTANG AND SCARBOROUGH.

GENERAL SITUATION AT 180900 UTC:
FOR DETAILS ON TROPICAL STORM DANAS (1905), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS. LOW 994 HPA 21N 119E NE 10KT INTST NC.

MARINE FORECAST FOR 24 HOURS FROM 181300 UTC:

HONG KONG= W TO SW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL E UP TO 2 M, SW UP TO 2 M. TEMP 28-32 C. =
KWANGTUNG= W TO SW 5-6, N TO NW 5-6 IN E AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL E 2-3 M, SW 2 M. =
TAIWAN STRAIT= NE 6-7, BEC SW 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 2-3 M. =
BASHI= SW 7-8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL SW 3-4 M, E TO NE 3-4 M. =
PRATAS= NW 5-6, BEC W TO SW 6. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 3 M, E TO NE 2-3 M. =
BALINTANG= SW 7-8. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL SW 3-4 M, E TO NE 3-4 M. =
SCARBOROUGH= SW 7-8, 5-6 LATER. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M, 2-3 M LATER. SWELL SW 3-4 M, NE 3 M. =
PARACEL= S TO SW 5-6. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 3 M, NE 2-3 M. =
TONKIN= S 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= S 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL S 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 05:30 HKT 19/Jul/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 19 July 2019

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

    Weather Situation:
    A southwesterly airstream is affecting the south China coastal waters. Besides, the area of low pressure over the northeastern part of the South China Sea is bringing unsettled weather to the region.

    At 5 a.m., Tropical Storm Danas with maximum sustained winds of about 85 kilometres per hour near its centre was located at 28.4 degrees north, 124.0 degrees east. It is forecast to move north at about 22 kilometres per hour across the East China Sea.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    West to southwest force 4 to 5.
    Scattered squally showers and thunderstorms.
    Moderate seas.

    Nan'ao, Shanwei and South of Hong Kong:
    West to southwest force 5 to 6.
    Scattered squally showers and thunderstorms.
    Rough seas.

    Shangchuan Dao:
    South to southwest force 4 to 5, occasionally force 6.
    Scattered squally showers and thunderstorms.
    Rough seas.

    Outlook for the next 48 hours
    South to southwesterly winds of force 4 to 5, occasionally force 6. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind west-southwest force 3
      Visibility 20 Kilometres

    Shantou Wind south-southeast force 2
      Visibility 30 Kilometres

    Dongsha Wind west-southwest force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind west-southwest force 5

    Macau Wind south-southwest force 1
      Visibility 10 Kilometres

    Xisha Wind south-southwest force 4
      Visibility 20 Kilometres

  • Explanation of Seas or Sea Waves
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  • Descriptive Terms of Wind Speeds
  • Visibility Readings in Hong Kong Waters
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 19/JUL/2019
    (Next update at 9:00-9:30 HKT 19/JUL/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE AREA OF LOW PRESSURE OVER THE NORTHEASTERN
     PART OF THE SOUTH CHINA SEA IS BRINGING
     UNSETTLED WEATHER TO THE REGION.
     AT 11 P.M. LAST NIGHT, TROPICAL STORM DANAS WAS
     CENTERED AT 27.4 DEGREES NORTH, 123.8 DEGREES
     EAST. IT IS FORECAST TO MOVE NORTH AT ABOUT 12
     KNOTS ACROSS THE EAST CHINA SEA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  240/5-10
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  240/10-15                            28-34
   B.   2000 FT:  270/15                               25
   C.   5000 FT:  300/15                               20
   D.  10000 FT:  290/10                               12
   E.  18000 FT:  050/10                               0
   F.  24000 FT:  060/20                               MS12
   G.  30000 FT:  060/30                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY WITH OCCASIONAL SHOWERS. A FEW
      SQUALLY THUNDERSTORMS IN THE MORNING.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 4000 FT
      TEMPO FEW CB 800 FT SCT 1500 FT BKN 4000 FT.
   K. VISIBILITY    : 8 KM. TEMPO 3500 M IN SHOWERS. 
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 18000 FT      10 DEG. C LEVEL(S) : 11200 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHWESTERLY 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.

    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 07:08 HKT on 19 Jul 19

    VHHK SIGMET 7 VALID 182305/190305 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1723 E11434 - N1944 E11345 - N2240 E11418 - N2321 E11556 - N2303 E11730 - N2100 E11730 TOP FL480 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 06:30 HKT 19/Jul/2019


    Tropical Cyclone Warning

    At 182100 UTC, Tropical Storm Danas (1905) with central pressure 986 hectopascals was centred within 60 nautical miles of two eight point four degrees north (28.4 N) one two four point zero degrees east (124.0 E) and is forecast to move north at about 12 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 45 knots.

    Radius of over 33 knot winds 150 nautical miles over eastern semicircle, 120 nautical miles elsewhere.
    Radius of over 2 metre waves 270 nautical miles over eastern semicircle, 180 nautical miles elsewhere.

    Forecast position and intensity at 192100 UTC
    Three three point two degrees north (33.2 N)
    One two four point nine degrees east (124.9 E)
    Maximum winds 40 knots.

    Forecast position and intensity at 202100 UTC
    Become extratropical low.



    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 19/Jul/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     35.0 C
Minimum Air Temperature                     29.6 C
Grass Minimum Temperature                   28.2 C
Relative Humidity                        63 - 84 Percent
Rainfall                                      Trace 
Total rainfall since 1st January          1272.0 mm
Against an average of                     1308.5 mm

Other Stations                Min                  Max
King's Park                  28.6 C               34.4 C
Wong Chuk Hang               28.4 C               33.4 C
Ta Kwu Ling                  26.4 C               35.7 C
Lau Fau Shan                 26.3 C               35.2 C
Tai Po                       25.9 C               34.7 C
Sha Tin                      27.7 C               35.3 C
Tuen Mun                     27.5 C               36.0 C
Tseung Kwan O                26.8 C               34.2 C
Sai Kung                     27.9 C               34.5 C
Cheung Chau                  27.5 C               34.7 C
Chek Lap Kok                 29.9 C               37.2 C
Tsing Yi                     28.6 C               34.6 C
Shek Kong                    24.8 C               34.8 C
Tsuen Wan Ho Koon            25.3 C               32.6 C
Tsuen Wan Shing Mun Valley   27.2 C               34.0 C
Hong Kong Park               28.8 C               34.6 C
Kowloon City                 29.1 C               35.3 C
Happy Valley                 29.2 C               35.5 C
Wong Tai Sin                 28.7 C               35.0 C
Stanley                      28.5 C               33.7 C
Kwun Tong                    29.3 C               34.0 C
Sham Shui Po                 28.8 C               34.6 C
Kai Tak Runway Park          28.0 C               32.8 C
Yuen Long Park               26.3 C               37.6 C
Tai Mei Tuk               26.7 C               35.6 C

Duration of sunshine (King's Park):              9.5 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 8.
 

Yesterday's (18 Jul 2019) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 to
0.15 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                               0.11
Yuen Ng Fan                         0.11
Tai Mei Tuk                         0.10
Sha Tau Kok                         0.10
Kwun Tong                           0.13
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
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 18 Jul
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