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Bulletin issued at 23:02 HKT 30/Sep/2019

At 11 p.m. at the Hong Kong Observatory the air temperature was 30 degrees Celsius and the relative humidity 60 per cent.

The air temperatures at other places were:

King's Park 29 degrees;
Wong Chuk Hang 26 degrees;
Ta Kwu Ling 25 degrees;
Lau Fau Shan 28 degrees;
Tai Po 27 degrees;
Sha Tin 27 degrees;
Tuen Mun 28 degrees;
Tseung Kwan O 26 degrees;
Sai Kung 27 degrees;
Cheung Chau 27 degrees;
Chek Lap Kok 30 degrees;
Tsing Yi 27 degrees;
Shek Kong 27 degrees;
Tsuen Wan Ho Koon 26 degrees;
Tsuen Wan Shing Mun Valley 26 degrees;
Hong Kong Park 28 degrees;
Shau Kei Wan 31 degrees;
Kowloon City 29 degrees;
Happy Valley 28 degrees;
Wong Tai Sin 28 degrees;
Stanley 28 degrees;
Kwun Tong 29 degrees;
Sham Shui Po 29 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 27 degrees;
Tai Mei Tuk 28 degrees.

Here is the information on Typhoon Mitag at 11 p.m.:
Location: 25.3 degrees north, 122.7 degrees east.


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


Climatological Information for 30 Sep

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Bulletin updated at 23:15 HKT 30/Sep/2019

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

The weather was generally fine over Guangdong today. Locally, it was fine and dry. There was some haze at first. It was very hot in the afternoon and temperatures over most parts of the territory rose to 33 degrees or above. Winds will be relatively weak and the weather will be hot with some haze over Guangdong in the next couple of days.

At 11 p.m., Typhoon Mitag was centred about 120 kilometres east-northeast of Taibei. It is forecast to move north-northwest at about 22 kilometres per hour, skirting the coastal waters of northeastern Taiwan, and move in the general direction of the east China coast later.

Weather forecast for Hong Kong (Tuesday, 1 Oct 2019)

Fine and dry. The minimum temperature will be about 27 degrees. Hot with some haze during the day with a maximum temperature of around 32 degrees in the urban areas, and a couple of degrees higher in the New Territories. Light to moderate west to southwesterly winds.

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


(The above forecast period is valid up to 23:59 HKT tomorrow, 01/10/2019; 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 30/Sep/2019

STORM WARNING AREA: TAIWAN STRAIT.
GALE WARNING AREA: BASHI.

GENERAL SITUATION AT 300900 UTC:
FOR DETAILS ON TYPHOON MITAG (1918), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 301300 UTC:

HONG KONG= W TO SW 4. DOWN TO 4000 M IN SOME HAZE. SWELL NE 2 M. TEMP 27-32 C. =
KWANGTUNG= W TO SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL NE 2-3 M. =
TAIWAN STRAIT= W TO NW 10-11, BEC S TO SW 8-9. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 10-12 M, 6-8 M LATER. SWELL NE 3-5 M. =
BASHI= W TO SW 8-9, BEC 6-7. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 6-8 M, BEC 3-4 M. SWELL NE 3-5 M. =
PRATAS= W TO SW 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL NE 3 M. =
BALINTANG= W TO SW 6-7. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 3-4 M. =
SCARBOROUGH= S TO SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL NE 2-3 M. =
PARACEL= S TO SW 4-5. FINE. SEA UP TO 2 M. SWELL NE 2 M. =
TONKIN= S TO SW 4. FINE. =
DANANG= S TO SW 4. FINE. =
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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    Bulletin issued at 23:30 HKT 30/Sep/2019

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

    Warnings:
    Strong winds in Nan'ao.

    Weather Situation:
    At 11 p.m., Typhoon Mitag with maximum sustained winds of about 145 kilometres per hour near its centre was located at 25.3 degrees north, 122.7 degrees east. It is forecast to move north-northwest at about 22 kilometres per hour skirting the coastal waters of northeastern Taiwan, and move in the general direction of the east China coast later.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    West to southwest force 4.
    Some haze.
    Moderate seas.

    Nan'ao:
    West to southwest force 6 to 7.
    Isolated showers and thunderstorms.
    Rough seas.

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

    South of Hong Kong and Shangchuan Dao:
    West to southwest force 4 to 5.
    Moderate seas.

    Outlook for the next 48 hours
    West to southwesterly winds of force 4 to 5.

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

    Waglan Island Wind west force 4
      Visibility 13 Kilometres

    Shantou Wind south-southeast force 2
      Visibility 30 Kilometres

    Huangmaozhou Wind west force 4

    Xisha Wind north-northeast force 2
      Visibility 10 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 30/SEP/2019
    (Next update at 01:30 HKT 01/OCT/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     WINDS ARE RELATIVELY WEAK AND THE WEATHER IS
     GENERALLY FINE OVER GUANGDONG.
     AT 4 P.M., TYPHOON MITAG WAS LOCATED AT 23.7
     DEGREES NORTH, 122.9 DEGREES EAST. IT IS
     FORECAST TO MOVE NORTHWEST OR NORTH-NORTHWEST AT
     ABOUT 14 KNOTS SKIRTING THE COASTAL WATERS OF
     EASTERN TAIWAN, AND MOVE IN THE GENERAL
     DIRECTION OF THE EAST CHINA COAST LATER.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  300/5-10                             33-27
   B.   2000 FT:  330/10                               25
   C.   5000 FT:  020/10                               18
   D.  10000 FT:  010/10
                  BECMG 270/10                         11
   E.  18000 FT:  320/15                               MS2
   F.  24000 FT:  340/20                               MS14
   G.  30000 FT:  270/20
                  BECMG 330/15                         MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      FINE. LOCALIZED HAZE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      NO CLOUDS OF HEIGHT AT OR BELOW 10,000 FT
   K. VISIBILITY    : 7 KM. TEMPO 4000 M IN HAZE.
   L. 0 DEG. C LEVEL: 15000 FT      10 DEG. C LEVEL(S) : 10800 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 29 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE WESTERLY WINDS. FINE.
     LOCALIZED HAZE.=

    ===================================================================
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.

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    TROPICAL CYCLONE WARNING FOR SHIPPING
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    Tropical Cyclone Warning for Shipping

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    Bulletin issued at 22:20 HKT 30/Sep/2019


    Tropical Cyclone Warning

    At 301200 UTC, Typhoon Mitag (1918) with central pressure 960 hectopascals was centred within 60 nautical miles of two four point six degrees north (24.6 N) one two two point nine degrees east (122.9 E) and is forecast to move northwest or north-northwest at about 12 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 80 knots.

    Radius of over 33 knot winds 210 nautical miles.
    Radius of over 47 knot winds 120 nautical miles over eastern semicircle, 90 nautical miles elsewhere.
    Radius of over 63 knot winds 45 nautical miles.
    Radius of over 2 metre waves 300 nautical miles.

    Forecast position and intensity at 011200 UTC
    Two nine point one degrees north (29.1 N)
    One two two point one degrees east (122.1 E)
    Maximum winds 65 knots.

    Forecast position and intensity at 021200 UTC
    Three three point four degrees north (33.4 N)
    One two five point zero degrees east (125.0 E)
    Maximum winds 50 knots.

    Forecast position and intensity at 031200 UTC
    Three six point two degrees north (36.2 N)
    One two nine point four degrees east (129.4 E)
    Maximum winds 40 knots.

    Forecast position and intensity at 041200 UTC
    Three seven point two degrees north (37.2 N)
    One three five point nine degrees east (135.9 E)
    Maximum winds 40 knots.

    Forecast position and intensity at 051200 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 30/Sep/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.7 C
Minimum Air Temperature                     26.6 C
Grass Minimum Temperature                   25.0 C
Relative Humidity                        63 - 83 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2233.2 mm
Against an average of                     2226.7 mm

Other Stations                Min                  Max
King's Park                  25.4 C               31.9 C
Wong Chuk Hang               24.0 C               31.8 C
Ta Kwu Ling                  22.1 C               34.3 C
Lau Fau Shan                 24.0 C               32.7 C
Tai Po                       24.2 C               31.3 C
Sha Tin                      23.8 C               33.6 C
Tuen Mun                     24.4 C               33.6 C
Tseung Kwan O                23.7 C               32.8 C
Sai Kung                     25.0 C               31.6 C
Cheung Chau                  24.4 C               33.5 C
Chek Lap Kok                 25.6 C               33.4 C
Tsing Yi                     24.1 C               31.7 C
Tsuen Wan Ho Koon            22.4 C               30.7 C
Tsuen Wan Shing Mun Valley   22.8 C               32.6 C
Hong Kong Park               25.0 C               30.7 C
Shau Kei Wan                 25.3 C               32.5 C
Kowloon City                 25.4 C               33.4 C
Happy Valley                 24.7 C               33.3 C
Wong Tai Sin                 24.9 C               33.0 C
Stanley                      25.2 C               32.2 C
Kwun Tong                    25.4 C               32.4 C
Sham Shui Po                 25.3 C               34.3 C
Kai Tak Runway Park          25.7 C               31.8 C
Yuen Long Park               22.9 C               34.6 C
Tai Mei Tuk               24.9 C               34.7 C

Duration of sunshine (King's Park):              8.8 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 7.
 

Yesterday's (29 Sep 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                         0.12
Tai Mei Tuk                         0.11
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 29 Sep
     2003copy right image | Important notices | Privacy policy Last revision date: <30 Sep 2019> 

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