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Bulletin issued at 23:02 HKT 27/Sep/2016

At 11 p.m. at the Hong Kong Observatory the air temperature was 32 degrees Celsius and the relative humidity 55 per cent.

Tropical Cyclone Megi will cross Taiwan Strait overnight and make landfall over the vicinity of Fujian tomorrow morning. It will then move inland and weaken rapidly. Local winds is expected to be fresh, occasionally strong on high ground. The Observatory will continue to closely monitor any change of the track of Megi and its effect on local weather.

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 33 degrees;
Wong Chuk Hang 32 degrees;
Ta Kwu Ling 28 degrees;
Lau Fau Shan 31 degrees;
Tai Po 31 degrees;
Sha Tin 32 degrees;
Tuen Mun 31 degrees;
Tseung Kwan O 29 degrees;
Sai Kung 33 degrees;
Cheung Chau 31 degrees;
Chek Lap Kok 33 degrees;
Tsing Yi 32 degrees;
Shek Kong 32 degrees;
Tsuen Wan Ho Koon 32 degrees;
Tsuen Wan Shing Mun Valley 31 degrees;
Hong Kong Park 30 degrees;
Shau Kei Wan 33 degrees;
Kowloon City 33 degrees;
Happy Valley 32 degrees;
Wong Tai Sin 33 degrees;
Stanley 32 degrees;
Kwun Tong 32 degrees;
Sham Shui Po 31 degrees;
Kai Tak Runway Park 33 degrees;
Yuen Long Park 32 degrees.

Here is the information on Typhoon Megi at 11 p.m.:
Location: 23.8 degrees north, 120.0 degrees east.


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


Climatological Information for 27 Sep

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 23:15 HKT 27/Sep/2016

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

The subsidence airstream associated with Tropical Cyclone Megi affected Guangdong today. Locally, it was mainly fine and very hot but hazy. The visibility over parts of the territory of Hong Kong fell below 3000 metres this morning. Temperatures generally rose to 34 degrees over Hong Kong in the afternoon, and temperatures even rose to around 36 degrees over parts of the New Territories. A northeast monsoon is expected to bring slightly cooler weather to Guangdong in the latter part of this week.

Besides, Megi weakened from a severe typhoon into a typhoon today. At 11 p.m., Megi was centred about 210 kilometres east-southeast of Xiamen. It is forecast to move west-northwest at about 22 kilometres per hour across Taiwan Strait, and edge closer to the vicinity of Fujian.

Weather forecast for Hong Kong (Wednesday, 28 Sep 2016)

Mainly fine and hot at first. Becoming cloudy with a few showers later. Temperatures will range between 27 and 32 degrees. Moderate to fresh west to northwesterly winds, occasionally strong offshore and on high ground.

Outlook : Slightly cooler with a few showers in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 28/09/2016; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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MARINE FORECAST
Traditional Chinese Simplified Chinese

Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 27/Sep/2016

HURRICANE WARNING AREA: TAIWAN STRAIT.
STORM WARNING AREA: BASHI.
GALE WARNING AREAS: KWANGTUNG, PRATAS AND BALINTANG.

GENERAL SITUATION AT 270900 UTC:
FOR DETAILS ON SEVERE TYPHOON MEGI (1617), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 271300 UTC:

HONG KONG= W TO NW 4-5, OCNL 6 LATER. ISOL SHOWERS AND TS LATER. SEA 2 M. TEMP 27-32 C. =
KWANGTUNG= W TO NW 5-6, 8-9 IN E, SW 5-6 LATER. DOWN TO 500 M IN FRQ SQUALLY SHOWERS AND TS IN E. SEA 2-3 M, 6-8 M IN E. SWELL NE 3-4 M LATER. =
TAIWAN STRAIT= CYCLONIC 12, S TO SW 7-8 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 14 M, 4-6 M LATER. SWELL NE 4-6 M. =
BASHI= SW 9-10, 5-6 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 8-10 M, 2-3 M LATER. SWELL NE 4-6 M. =
PRATAS= W TO SW 7-8. DOWN TO 1000 M IN OCNL SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL NE 3 M. =
BALINTANG= SW 7-8, 5-6 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M, 2-3 M LATER. SWELL NE 4-6 M. =
SCARBOROUGH= SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL NE 2-3 M. =
PARACEL= W TO SW 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
TONKIN= W TO NW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= W TO NW 4-5. ISOL SHOWERS AND TS. 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.


  • Map showing the 10 forecast areas
  • Tidal Information

    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

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    Bulletin issued at 23:30 HKT 27/Sep/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 27 September 2016

    Warnings:
    Hurricane force winds in Nan'ao. Gale force winds in Shanwei. Strong winds in Hong Kong adjacent waters and south of Hong Kong.

    Weather Situation:
    At 11 p.m., Typhoon Megi with maximum sustained winds of about 145 kilometres per hour near its centre was located at 23.8 degrees north, 120.0 degrees east, it is forecast to move west-northwest at about 22 kilometres per hour across Taiwan Strait, and edge closer to the vicinity of Fujian.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    West to northwest force 4 to 5, up to force 6 later.
    Isolated showers and thunderstorms later.
    Moderate to rough seas.

    Nan'ao:
    West to northwest force 11 to 12, becoming southwest force 8 to 9 later.
    Frequent heavy squally showers and thunderstorms.
    Phenomenal seas, becoming very rough to high later.

    Shanwei:
    West to northwest force 8 to 9, becoming southwest force 5 to 6 later.
    Occasional heavy squally showers and thunderstorms later.
    Very rough to high seas, becoming rough later.

    South of Hong Kong:
    West to northwest force 5 to 6.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas, becoming rough later.

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

    Outlook for the next 48 hours
    South to southwesterly winds of force 5 to 6, up to force 7 in east at first. Isolated showers and thunderstorms.

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

    Waglan Island Wind north-northwest force 4
      Visibility 14 Kilometres

    Shantou Wind west-northwest force 3
      Visibility 27 Kilometres

    Dongsha Wind west force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind west-northwest force 4

    Macau Wind west-northwest force 3
      Visibility 11 Kilometres

    Xisha Wind west force 2
      Visibility 21 Kilometres

  • Explanation of Seas or Sea Waves
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    • WEATHER FORECAST FOR LOCAL AVIATION
    Traditional Chinese Simplified Chinese

    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 27/SEP/2016
    (Next update at 01:30 HKT 28/SEP/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE SUBSIDENCE AIRSTREAM ASSOCIATED WITH TROPICAL CYCLONE MEGI 
     IS AFFECTING GUANGDONG.  
     AT 4 P.M., SEVERE TYPHOON MEGI WAS CENTRED NEAR 24.2 DEGREES NORTH,
     121.3 DEGREES EAST.  IT IS FORECAST TO MOVE WEST-NORTHWEST AT 
     ABOUT 12 KNOTS ACROSS TAIWAN AND EDGE CLOSER TO THE VICINITY OF FUJIAN.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  330/10-15, OCNL 20
       OFFSHORE:  330/15-20, OCNL 25 IN E              31-27
   B.   2000 FT:  340/20-25                            28
   C.   5000 FT:  350/25                               21
   D.  10000 FT:  020/30                               14
   E.  18000 FT:  030/30                               MS2
   F.  24000 FT:  050/35                               MS13
   G.  30000 FT:  080/25                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT
   K. VISIBILITY    : 7 KM.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 13000 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 29 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH WEST TO NORTHWESTERLY WINDS,
     OCCASIONALLY STRONG OFFSHORE AND ON HIGH GROUND.
     MAINLY FINE, BECOMING CLOUDY. A FEW SHOWERS LATER.=

    ===================================================================
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 17:33 HKT on 25 Sep 16

    VHHK SIGMET 3 VALID 250935/251335 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1900 E11554 - N1642 E11400 - N1824 E11230 - N1900 E11330 - N1900 E11554 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.

    The latest report on Tropical Cyclone Meranti broadcast by Ms LAM CHING CHI , Senior Scientific Officer of the Hong Kong Observatory at 6:15 p.m. on 14 Sep 2016.
    Listen Listen

    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 22:00 HKT 27/Sep/2016


    Tropical Cyclone Warning

    Severe Typhoon Megi (1617) has weakened into a Typhoon with central pressure 955 hectopascals. At 271200 UTC, it was centred within 60 nautical miles of two three point eight degrees north (23.8 N) one two zero point five degrees east (120.5 E) and is forecast to move west-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 180 nautical miles.
    Radius of over 47 knot winds 120 nautical miles.
    Radius of over 63 knot winds 60 nautical miles.
    Radius of over 2 metre waves 270 nautical miles.

    Forecast position and intensity at 281200 UTC
    Two four point eight degrees north (24.8 N)
    One one six point four degrees east (116.4 E)
    Maximum winds 40 knots.

    Forecast position and intensity at 291200 UTC
    Dissipated over land.



    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 27/Sep/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.1 C
Minimum Air Temperature                     27.0 C
Grass Minimum Temperature                   26.4 C
Relative Humidity                        71 - 89 Percent
Rainfall                                      Trace 
Total rainfall since 1st January          2263.8 mm
Against an average of                     2209.4 mm

Other Stations                Min                  Max
King's Park                  26.1 C               31.4 C
Wong Chuk Hang               26.2 C               30.3 C
Ta Kwu Ling                  25.4 C               32.8 C
Lau Fau Shan                 25.4 C               31.5 C
Tai Po                       26.0 C               32.2 C
Sha Tin                      26.1 C               32.1 C
Tuen Mun                     25.9 C               32.5 C
Tseung Kwan O                26.0 C               32.3 C
Sai Kung                     26.7 C               31.6 C
Cheung Chau                  26.0 C               31.7 C
Chek Lap Kok                 27.0 C               32.7 C
Tsing Yi                     26.0 C               31.6 C
Shek Kong                    25.0 C               33.0 C
Tsuen Wan Ho Koon            24.4 C               29.8 C
Tsuen Wan Shing Mun Valley   25.4 C               31.9 C
Hong Kong Park               26.3 C               30.8 C
Shau Kei Wan                 26.4 C               30.9 C
Kowloon City                 26.3 C               32.4 C
Happy Valley                 26.8 C               32.0 C
Wong Tai Sin                 26.1 C               32.1 C
Stanley                      26.7 C               29.8 C
Kwun Tong                    26.4 C               31.3 C
Sham Shui Po                 26.7 C               32.1 C
Kai Tak Runway Park          27.3 C               31.7 C
Yuen Long Park               25.6 C               33.5 C

Duration of sunshine (King's Park):              7.3 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.
Sea surface temperature (Waglan Island):        28.6 C 

Yesterday's (26 Sep 2016) 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                               0.09
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.13
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                        0.14

Note

      

    1. From readings taken at various locations in Hong Kong during
the period 1987-2015, the background ambient gamma radiation
levels may vary between 0.06 and 0.30 microsievert per hour.

    2. The extent of health effects to a person as a result of
exposure to radiation is expressed by a physical quantity
called equivalent dose, in unit of sievert.  Protective
action may be required if there is an increase in the
ambient gamma dose rate above background such that the total
additional dose is expected to exceed 5000 microsieverts in
a relatively short period of time. For example, a dose of
5000 microsieverts may be reached when the ambient gamma
dose rate is 1000 microsieverts per hour (several thousand
times above background) and lasts for 5 hours.

    3. The readings of ambient gamma radiation level from
instrument are expressed in unit of gray, which is
numerically equal to the gamma dose expressed in sievert.
    Climatological Information for 26 Sep
     2003copy right image | Important notices | Privacy policy Last revision date: <27 Sep 2016> 

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