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Bulletin issued at 12:02 HKT 23/Jul/2018

At noon at the Hong Kong Observatory the air temperature was 31 degrees Celsius and the relative humidity 80 per cent.
During the past hour the mean UV Index recorded at King's Park was 5. The intensity of UV radiation was moderate.

The air temperatures at other places were:

King's Park 30 degrees;
Wong Chuk Hang 31 degrees;
Ta Kwu Ling 31 degrees;
Lau Fau Shan 30 degrees;
Tai Po 30 degrees;
Sha Tin 31 degrees;
Tuen Mun 31 degrees;
Tseung Kwan O 32 degrees;
Sai Kung 31 degrees;
Cheung Chau 31 degrees;
Chek Lap Kok 32 degrees;
Tsing Yi 32 degrees;
Shek Kong 32 degrees;
Tsuen Wan Ho Koon 29 degrees;
Tsuen Wan Shing Mun Valley 31 degrees;
Hong Kong Park 30 degrees;
Shau Kei Wan 30 degrees;
Kowloon City 31 degrees;
Happy Valley 32 degrees;
Wong Tai Sin 31 degrees;
Stanley 31 degrees;
Kwun Tong 31 degrees;
Sham Shui Po 31 degrees;
Kai Tak Runway Park 30 degrees;
Yuen Long Park 32 degrees;
Tai Mei Tuk 31 degrees.

Between 10:45 and 11:45 a.m., the rainfall recorded in various regions were:

North District 0 to 1 mm;
Sai Kung 0 to 1 mm;
Tai Po 0 to 1 mm.

4 millimetres of rainfall were recorded at the Hong Kong Observatory between midnight last night and midday today.

Here is the information on Tropical Depression at noon:
Location: 20.3 degrees north, 109.8 degrees east.


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


Climatological Information for 23 Jul

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 11:45 HKT 23/Jul/2018

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

Showers are affecting Guangdong and the northern part of the South China Sea.

At noon, the tropical depression near Leizhou Peninsula was centred about 70 kilometres west-northwest of Haikou. It is forecast to move north slowly across Leizhou Peninsula in the general direction of Guangxi. Meanwhile, Tropical Storm Ampil was centred about 300 kilometres north of Nanjing. It is forecast to move northwest at about 20 kilometres per hour across Jiangsu and Shandong and weaken gradually. Besides, the tropical depression near Taiwan has weakened into an area of low pressure over the East China Sea.

Weather forecast for this afternoon and tonight

Mainly cloudy with occasional showers and a few squally thunderstorms. Sunny intervals in the afternoon. Moderate to fresh southeasterly winds.

Outlook : Occasional showers with isolated thunderstorms in the next couple of days. Showers easing off with sunny periods towards the weekend.


(The above forecast period is valid up to 23:59 HKT today, 23/07/2018; 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 09:00 HKT 23/Jul/2018

GALE WARNING AREA: PARACEL.

GENERAL SITUATION AT 222100 UTC:
FOR DETAILS ON THE TROPICAL DEPRESSION EAST OF TAIWAN, PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS. FOR DETAILS ON THE TROPICAL DEPRESSION OVER HAINAN ISLAND, PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 230100 UTC:

HONG KONG= S 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. TEMP 30-26 C. =
KWANGTUNG= S TO SW 5-6, OCNL 7 IN W. DOWN TO 1000 M IN OCNL SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 4 M IN W. SWELL SW 2-3 M. =
TAIWAN STRAIT= SW 4-5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL SW 2 M, NE 2 M. =
BASHI= SW 4-5, 6 AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2 M, 3 M AT FIRST. SWELL SW 2-3 M. =
PRATAS= S 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2-3 M. =
BALINTANG= SW 4-5, 6 AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2 M, 3 M AT FIRST. SWELL SW 2-3 M. =
SCARBOROUGH= SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2-3 M. =
PARACEL= S 6-7, OCNL 8 IN N. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS IN N. SEA 3-4 M, UP TO 6 M IN N. SWELL SW 2-3 M. =
TONKIN= CYCLONIC 6-7, SW 6-7 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 2-3 M. =
DANANG= SW 5-6, UP TO 7 IN N AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 4 M IN N AT FIRST. 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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    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

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    Bulletin issued at 12:30 HKT 23/Jul/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 23 July 2018

    Warnings:
    Strong winds in Hong Kong adjacent waters, south of Hong Kong and Shangchuan Dao.

    Weather Situation:
    At noon, the tropical depression near Leizhou Peninsula with maximum sustained winds of about 55 kilometres per hour near its centre was located near 20.3 degrees north, 109.8 degrees east. It is forecast to move north slowly across Leizhou Peninsula in the general direction of Guangxi. Besides, the tropical depression near Taiwan has weakened into an area of low pressure over the East China Sea.

    Area forecasts for the next 24 hours

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

    Nan'ao and Shanwei:
    South force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

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

    Shangchuan Dao:
    South force 5 to 6, occasionally force 7.
    Frequent heavy squally showers and thunderstorms.
    Rough seas.

    Outlook for the next 48 hours
    South to southeasterly winds of force 4 to 5, up to force 6 at first. Scattered squally showers and thunderstorms.

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

    Waglan Island Wind east-southeast force 5
      Visibility 15 Kilometres

    Shantou Wind west-southwest force 2
      Visibility 30 Kilometres

    Dongsha Wind south force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind southeast force 5

    Macau Wind east force 2
      Visibility 13 Kilometres

    Xisha Wind south-southwest force 5
      Visibility 9 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 12:30 HKT 23/JUL/2018
    (Next update at 17:30 HKT 23/JUL/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS, SEV TURB AND SEV GUSTS. 
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AT NOON, THE TROPICAL DEPRESSION NEAR LEIZHOU
     PENINSULA WAS CENTRED NEAR 20.3 DEGREES NORTH,
     109.8 DEGREES EAST. IT IS FORECAST TO MOVE NORTH
     SLOWLY ACROSS LEIZHOU PENINSULA IN THE GENERAL
     DIRECTION OF GUANGXI. MEANWHILE, THE TROPICAL
     DEPRESSION NEAR TAIWAN HAS WEAKENED INTO AN AREA
     OF LOW PRESSURE OVER THE EAST CHINA SEA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  120/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  130/15-20, OCNL 25                   32-28
   B.   2000 FT:  150/25-30                            24
   C.   5000 FT:  160/25                               20
   D.  10000 FT:  170/25-30                            11
   E.  18000 FT:  170/20                               MS1
   F.  24000 FT:  160/15                               MS12
   G.  30000 FT:  070/10                               MS23
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      SUNNY INTERVALS 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    : 10 KM.  TEMPO 3500 M IN SHOWERS. 
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 11000 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 2.0-3.0 M     SEA TEMPERATURE    : 29 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTH TO SOUTHEASTERLY WINDS, FRESH
     OFFSHORE.  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.

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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 12:19 HKT on 23 Jul 18

    VHHK SIGMET 1 VALID 230025/230425 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1824 E11412 - N1730 E11312 - N1930 E11130 - N2130 E11130 - N2236 E11400 - N1824 E11412 TOP FL480 MOV N 10KT NC= VHHK SIGMET 3 VALID 230425/230825 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2130 E11412 - N1924 E11448 - N1800 E11254 - N1930 E11130 - N2130 E11130 - N2224 E11342 - N2130 E11412 TOP FL480 MOV NNW 05KT 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 12:32 HKT 23/Jul/2018


    Tropical Cyclone Warning

    At 230300 UTC, the tropical depression near Leizhou Peninsula with central pressure 994 hectopascals was centred within 60 nautical miles of two zero point three degrees north (20.3 N) one one zero point zero degrees east (110.0 E) and is forecast to move north slowly for the next 24 hours.

    Maximum winds near the centre are estimated to be 30 knots.

    Radius of over 2 metre waves 120 nautical miles.

    Forecast position and intensity at 240300 UTC
    Two one point eight degrees north (21.8 N)
    One zero nine point five degrees east (109.5 E)
    Maximum winds 30 knots.

    Forecast position and intensity at 250300 UTC
    Dissipated over land.

    Bulletin issued at 12:30 HKT 23/Jul/2018


    Tropical Cyclone Warning

    The tropical depression near Taiwan has weakened into an area of low pressure with central pressure 1002 hectopascals. At 230300 UTC, it was centred within 90 nautical miles of two six point six degrees north (26.6 N) one two three point three degrees east (123.3 E).

    Maximum winds near the centre are estimated to be 20 knots.

    No further warnings on this area of low pressure will be issued by the Hong Kong Observatory unless regeneration 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 23/Jul/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.4 C
Minimum Air Temperature                     27.9 C
Grass Minimum Temperature                   26.2 C
Relative Humidity                        58 - 87 Percent
Rainfall                                      Trace 
Total rainfall since 1st January           934.3 mm
Against an average of                     1378.5 mm

Other Stations                Min                  Max
King's Park                  27.3 C               32.4 C
Wong Chuk Hang               25.7 C               31.3 C
Ta Kwu Ling                  24.4 C               33.7 C
Lau Fau Shan                 26.6 C               32.1 C
Tai Po                       26.2 C               33.4 C
Sha Tin                      26.2 C               33.5 C
Tuen Mun                     26.4 C               32.2 C
Tseung Kwan O                25.3 C               34.5 C
Sai Kung                     26.6 C               34.9 C
Cheung Chau                  26.0 C               31.6 C
Chek Lap Kok                 26.9 C               33.7 C
Tsing Yi                     26.6 C               33.0 C
Shek Kong                    25.6 C               34.5 C
Tsuen Wan Ho Koon            24.9 C               31.0 C
Tsuen Wan Shing Mun Valley   25.1 C               32.2 C
Hong Kong Park               26.5 C               33.8 C
Shau Kei Wan                 27.5 C               33.8 C
Kowloon City                 26.9 C               33.3 C
Happy Valley                 26.5 C               33.9 C
Wong Tai Sin                 26.4 C               33.7 C
Stanley                      26.8 C               30.8 C
Kwun Tong                    27.4 C               33.3 C
Sham Shui Po                 27.0 C               32.7 C
Kai Tak Runway Park          27.6 C               33.1 C
Yuen Long Park               25.6 C               33.5 C
Tai Mei Tuk               26.2 C               33.9 C

Duration of sunshine (King's Park):              9.3 H
The mean UV index recorded at King's Park yesterday was 5,
the UV intensity was Moderate.
The maximum UV index for yesterday was 11.
 

Yesterday's (22 Jul 2018) 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                           0.09
Tap Mun                             0.09
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                          0.08
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.13
Chek Lap Kok                        0.14

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 22 Jul
     2003copy right image | Important notices | Privacy policy Last revision date: <23 Jul 2018> 

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