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Bulletin issued at 03:02 HKT 18/Jul/2019

At 3 a.m. at the Hong Kong Observatory the air temperature was 30 degrees Celsius and the relative humidity 83 per cent.

Please be reminded that:

The Very Hot Weather Warning is now in force. Very hot weather might cause adverse health effects. Members of the public should take care to avoid heatstroke.

The air temperatures at other places were:

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

Here is the information on Tropical Storm Danas at 3 a.m.:
Location: 21.9 degrees north, 124.4 degrees east.


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


Climatological Information for 18 Jul

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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

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Bulletin updated at 02:45 HKT 18/Jul/2019

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

Winds are weak over the coast of Guangdong. Meanwhile, the area of low pressure over the seas west of Luzon is intensifying gradually. A tropical cyclone appears to be forming.

At 2 a.m., Tropical Storm Danas was centred about 590 kilometres southwest of Okinawa. It is forecast to move north at about 25 kilometres per hour towards the East China Sea.

Weather forecast for today

Mainly cloudy and hazy. The minimum temperature will be about 28 degrees. Very hot with sunny periods during the day. The maximum temperature will be around 33 degrees in the urban areas, and a couple of degrees higher in the New Territories. A few showers and squally thunderstorms later. Light to moderate westerly winds.

Outlook : A few showers in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 18/07/2019; 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 17/Jul/2019

GALE WARNING AREAS: BASHI AND BALINTANG.

GENERAL SITUATION AT 170900 UTC:
FOR DETAILS ON TROPICAL DEPRESSION DANAS (1905), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 171300 UTC:

HONG KONG= W 3-4. ISOL SHOWERS AND TS. DOWN TO 4000 M IN HAZE. TEMP 28-33 C. =
KWANGTUNG= W TO NW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
TAIWAN STRAIT= NE 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL NE 2 M. =
BASHI= N TO NE 7-8. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL E TO NE 4 M, SE 2 M. =
PRATAS= N TO NW 5-6. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL NE 3 M. =
BALINTANG= N TO NW 7-8. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL E TO NE 4 M, SE 2 M. =
SCARBOROUGH= W TO NW 6-7. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 3 M, W TO SW 3 M. =
PARACEL= W TO SW 4-5. DOWN TO 2000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M, NE 2 M. =
TONKIN= S 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
DANANG= S 4-5. ISOL SHOWERS. SEA 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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    Bulletin issued at 03:30 HKT 18/Jul/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 18 July 2019

    Warnings:
    Strong winds in Nan'ao.

    Weather Situation:
    The area of low pressure over the seas west of Luzon is intensifying gradually. A tropical cyclone appears to be forming.

    At 3 a.m., Tropical Storm Danas with maximum sustained winds of about 65 kilometres per hour near its centre was located at 21.9 degrees north, 124.4 degrees east. It is forecast to move north at about 25 kilometres per hour towards the East China Sea.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    West to northwest force 3 to 4.
    Hazy with isolated showers and thunderstorms.
    Slight to moderate seas.

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

    Shanwei:
    North to northwest force 4 to 5.
    Isolated squally showers and thunderstorms.
    Moderate seas.

    South of Hong Kong:
    West to northwest force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

    Shangchuan Dao:
    West to southwest force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    West to northwesterly winds of force 5 to 6, becoming southwesterly winds of force 5 to 6 later. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind north-northwest force 2
      Visibility 17 Kilometres

    Shantou Wind west force 1
      Visibility 30 Kilometres

    Dongsha Wind north force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind west-northwest force 4

    Macau Wind west force 3
      Visibility 11 Kilometres

    Xisha Wind west-southwest force 3
      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 01:30 HKT 18/JUL/2019
    (Next update at 9:00-9:30 HKT 18/JUL/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     WINDS ARE WEAK OVER THE COAST OF GUANGDONG.
     MEANWHILE, THE AREA OF LOW PRESSURE OVER THE
     SEAS WEST OF LUZON IS INTENSIFYING GRADUALLY. A
     TROPICAL CYCLONE APPEARS TO BE FORMING. AT 1
     A.M., TROPICAL STORM DANAS WAS CENTERED AT 19.6
     DEGREES NORTH, 124.0 DEGREES EAST. IT IS
     FORECAST TO MOVE NORTH AT ABOUT 14 KNOTS TOWARDS
     THE EAST CHINA SEA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  250/5-10
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  250/10-15                            33-29
   B.   2000 FT:  310/10-15                            25
   C.   5000 FT:  350/20                               20
   D.  10000 FT:  030/15-20                            15
   E.  18000 FT:  050/20                               0
   F.  24000 FT:  070/25                               MS10
   G.  30000 FT:  060/30                               MS22
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY AND LOCALIZED HAZE.  A FEW
      SHOWERS AND SQUALLY THUNDERSTORMS
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT.
      TEMPO FEW CB 1000 FT SCT 1500 FT BKN 4000 FT.
      
   K. VISIBILITY    : 7 KM. TEMPO 4000 M IN HAZE. TEMPO 3500 M IN SHOWERS. TEMPO 2500 M IN TS.
   L. 0 DEG. C LEVEL: 18000 FT      10 DEG. C LEVEL(S) : 12400 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE WESTERLY WINDS. A FEW SHOWERS
     AND 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 00:10 HKT on 18 Jul 19

    VHHK SIGMET 1 VALID 171615/172015 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2059 E11729 - N1701 E11416 - N1822 E11242 - N2246 E11458 - N2332 E11622 - N2059 E11729 TOP FL500 MOV SW 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 03:30 HKT 18/Jul/2019


    Tropical Cyclone Warning

    At 171800 UTC, Tropical Storm Danas (1905) with central pressure 994 hectopascals was centred within 90 nautical miles of two one point seven degrees north (21.7 N) one two four point three degrees east (124.3 E) and is forecast to move north at about 14 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 35 knots.

    Radius of over 33 knot winds 60 nautical miles.
    Radius of over 2 metre waves 180 nautical miles.

    Forecast position and intensity at 181800 UTC
    Two seven point five degrees north (27.5 N)
    One two three point eight degrees east (123.8 E)
    Maximum winds 40 knots.

    Forecast position and intensity at 191800 UTC
    Three one point five degrees north (31.5 N)
    One two five point four degrees east (125.4 E)
    Maximum winds 35 knots.

    Forecast position and intensity at 201800 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 18/Jul/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     33.1 C
Minimum Air Temperature                     28.3 C
Grass Minimum Temperature                   27.8 C
Relative Humidity                        67 - 90 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          1272.0 mm
Against an average of                     1288.4 mm

Other Stations                Min                  Max
King's Park                  28.0 C               33.1 C
Wong Chuk Hang               26.5 C               32.9 C
Ta Kwu Ling                  26.2 C               35.9 C
Lau Fau Shan                 27.5 C               34.1 C
Tai Po                       26.9 C               34.3 C
Sha Tin                      26.9 C               35.0 C
Tuen Mun                     27.5 C               35.1 C
Tseung Kwan O                26.4 C               33.9 C
Sai Kung                     27.8 C               34.0 C
Cheung Chau                  26.7 C               35.6 C
Chek Lap Kok                 28.1 C               35.8 C
Tsing Yi                     27.3 C               34.0 C
Shek Kong                    26.3 C               34.8 C
Tsuen Wan Ho Koon            25.9 C               33.1 C
Tsuen Wan Shing Mun Valley   26.3 C               34.3 C
Hong Kong Park               27.3 C               35.0 C
Shau Kei Wan                 27.1 C               33.9 C
Kowloon City                 28.0 C               35.0 C
Happy Valley                 27.7 C               35.7 C
Wong Tai Sin                 27.6 C               35.4 C
Stanley                      27.3 C               33.0 C
Kwun Tong                    28.0 C               33.9 C
Sham Shui Po                 27.8 C               35.0 C
Kai Tak Runway Park          27.5 C               34.1 C
Yuen Long Park               27.0 C               36.4 C
Tai Mei Tuk               27.6 C               35.7 C

Duration of sunshine (King's Park):              6.2 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 8.
 

Yesterday's (17 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                               0.10
Yuen Ng Fan                         0.12
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 17 Jul
     2003copy right image | Important notices | Privacy policy Last revision date: <18 Jul 2019> 

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