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

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Bulletin issued at 01:30 HKT 07/Oct/2016

At 1 a.m. at the Hong Kong Observatory the air temperature was 26 degrees Celsius and the relative humidity 97 per cent.

Please be reminded that:

The Tropical Cyclone Signal No. 1 has been issued.

The air temperatures at other places were:

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

Between 11:45 p.m. and 0:45 a.m., the rainfall recorded in various regions were:

Sai Kung 0 to 26 mm;
Yau Tsim Mong 19 to 21 mm;
Kwun Tong 16 to 20 mm;
Kowloon City 18 to 20 mm;
Central & Western District 6 to 19 mm;
Wong Tai Sin 17 to 18 mm;
Sham Shui Po 10 to 17 mm;
Sha Tin 2 to 16 mm;
Kwai Tsing 5 to 16 mm;
Wan Chai 7 to 15 mm;
Southern District 0 to 14 mm;
Eastern District 3 to 13 mm;
Tai Po 0 to 10 mm;
Tsuen Wan 0 to 7 mm;
Islands District 0 to 7 mm;
North District 0 to 7 mm.

Here is the information on Tropical Storm Aere:
Location: 20.5 degrees north, 117.3 degrees east; Maximum sustained wind near its centre: 75 km/h.


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


Climatological Information for 7 Oct

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 00:45 HKT 07/Oct/2016

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

The northeast monsoon affected southern China yesterday. Locally, it was hot with sunny periods and a few showers. Meanwhile, Aere intensified from a tropical depression into a tropical storm yesterday. Under the combined effect of the northeast monsoon and Aere, it will be windier with rain over the south China coastal areas during the weekend and early next week.

Weather forecast for Hong Kong

Mainly cloudy with occasional showers. Isolated squally thunderstorms at first. Temperatures will range between 26 and 30 degrees. Moderate east to northeasterly winds, occasionally fresh offshore.

Outlook : Windier with a few rain patches over the weekend and Chung Yeung Festival holiday.


(The above forecast period is valid up to 23:59 HKT today, 07/10/2016; 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 06/Oct/2016

GALE WARNING AREAS: KWANGTUNG, BASHI, PRATAS AND BALINTANG.

GENERAL SITUATION AT 060900 UTC:
FOR DETAILS ON TROPICAL STORM AERE (1619), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 061300 UTC:

HONG KONG= NE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA 2-3 M. TEMP 26-30 C. =
KWANGTUNG= NE 5-6, 7-8 IN E LATER. DOWN TO 1000 M IN SCT SQUALLY SHOWERS AND TS LATER. SEA 2-3 M, 6 M IN E LATER. =
TAIWAN STRAIT= E TO SE 6-7. DOWN TO 2000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL S 2 M. =
BASHI= CYCLONIC 7-8, BEC SE 6-7. DOWN TO 1000 M IN OCNL SQUALLY SHOWERS AND TS. SEA UP TO 8 M. SWELL W 2-3 M. =
PRATAS= NE 6-7, BEC CYCLONIC 8-9. DOWN TO 1000 M IN OCNL SQUALLY SHOWERS AND TS. SEA UP TO 8 M. SWELL NE 2-3 M. =
BALINTANG= S TO SE 7-8, 6 LATER. DOWN TO 1000 M IN OCNL SQUALLY SHOWERS AND TS. SEA 3-6 M. SWELL W 2-3 M. =
SCARBOROUGH= S 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. =
PARACEL= N TO NE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. =
TONKIN= NE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
DANANG= NE 4-5. DOWN TO 4000 M IN ISOL SQUALLY 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

    Current Weather | Local Weather Forecast | Regional Temperature Forecast in HK
    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 01:15 HKT 07/Oct/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 1:15 a.m. on 07 October 2016

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

    Weather Situation:
    At 1 a.m., Tropical Storm Aere with maximum sustained winds of about 75 kilometres per hour near its centre was located at 20.5 degrees north, 117.3 degrees east. It is forecast to move west at about 10 kilometres per hour across the northern part of the South China Sea and intensify gradually.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North to northeast force 4 to 5, occasionally force 6.
    Occasional showers and isolated squally thunderstorms.
    Moderate to rough seas.

    Nan'ao:
    Northeast force 6 to 7, becoming force 8 to 9.
    Scattered heavy squally showers and thunderstorms.
    Rough seas, becoming very rough.

    Shanwei:
    Northeast force 6 to 7, force 8 to 9 later.
    Scattered heavy squally showers and thunderstorms.
    Rough seas, becoming very rough later.

    South of Hong Kong:
    North to northeast force 5 to 6, force 6 to 7 later.
    Isolated showers and thunderstorms.
    Rough seas.

    Shangchuan Dao:
    North to northeast force 5 to 6.
    Isolated showers and thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    Northeasterly winds of force 9 to 10. Scattered heavy squally showers and thunderstorms.

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

    Waglan Island Wind east force 5
      Visibility 21 Kilometres

    Shantou Wind calm
      Visibility 24 Kilometres

    Dongsha Wind north-northeast force 6
      Visibility 8 Kilometres

    Huangmaozhou Wind east-northeast force 5

    Macau Wind north force 2
      Visibility 7 Kilometres

    Xisha Wind northeast force 2
      Visibility 30 Kilometres

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
  • Descriptive Terms of Wind Speeds
  • Visibility Readings in Hong Kong Waters
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  • Tidal Information

    • WEATHER FORECAST FOR LOCAL AVIATION
    Traditional Chinese Simplified Chinese

    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 07/OCT/2016
    (Next update at 9:00-9:30 HKT 07/OCT/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AT 11 P.M. LAST NIGHT, TROPICAL STORM AERE WAS
     CENTRED AT 20.6 DEGREES NORTH, 117.6 DEGREES
     EAST. IT IS FORECAST TO MOVE WEST AT ABOUT 5
     KNOTS ACROSS THE NORTHERN PART OF THE SOUTH
     CHINA SEA AND INTENSIFY GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  030/10
                  TEMPO 100/15G25 IN TS
       OFFSHORE:  040/15-20                            26-29
   B.   2000 FT:  040/15-20                            23
   C.   5000 FT:  040/15                               19
   D.  10000 FT:  030/15                               10
   E.  18000 FT:  030/10                               MS3
   F.  24000 FT:  360/5-10                             MS13
   G.  30000 FT:  030/5-10                             MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS. ISOLATED
      THUNDERSTORMS AT FIRST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1200 FT SCT 3500 FT TEMPO FEW CB 1000 FT
      SCT 2500 FT
   K. VISIBILITY    : 10 KM. TEMPO 4000 M IN SHOWERS. TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS. MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.5-2.5 M     SEA TEMPERATURE    : 28 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE NORTH TO NORTHEASTERLY WINDS. MAINLY
     CLOUDY WITH OCCASIONAL SHOWERS.=

    ===================================================================
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 00:45 HKT on 07 Oct 16

    VHHK SIGMET 9 VALID 061540/061940 VHHH- VHHK HONG KONG FIR EMBD TS FCST N OF N2048 AND S OF N2236 AND W OF E11442 AND E OF E11254 TOP FL400 MOV SW 05KT NC= VHHK SIGMET 10 VALID 062120/070320 VHHH- VHHK HONG KONG FIR TC AERE FCST AT 2120Z N2030 E11706 CB TOP FL450 WI 120NM OF CENTRE MOV W 04KT INTSF FCST 0320Z TC CENTRE N2030 E11642=

    Please click here for more about the SIGMET

    TROPICAL CYCLONE WARNING Skip to main content
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    Tropical Cyclone Warnings

    Bulletin issued at 00:45 HKT 07/Oct/2016

    Tropical Cyclone Bulletin

    Here is the latest Tropical Cyclone Bulletin issued by the Hong Kong Observatory.

    The Standby Signal, No. 1 is in force.

    This means that a tropical cyclone now centred within about 800 kilometres of Hong Kong may affect us.

    At 1 a.m., Tropical Storm Aere was estimated to be about 380 kilometres east-southeast of Hong Kong (near 20.5 degrees north 117.3 degrees east) and is forecast to move west at about 10 kilometres per hour across the northern part of the South China Sea and intensify gradually.
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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
    Current Weather |  Local Weather Forecast |  9-day Weather Forecast
    South China Coastal Waters |  Marine Forecast
    Severe Weather Information Centre

    Bulletin issued at 00:30 HKT 07/Oct/2016


    Tropical Cyclone Warning

    At 061500 UTC, Tropical Storm Aere (1619) with central pressure 990 hectopascals was centred within 90 nautical miles of two zero point five degrees north (20.5 N) one one seven point five degrees east (117.5 E) and is forecast to move west at about 5 knots for the next 24 hours.

    Maximum winds near the centre are estimated to be 40 knots.

    Radius of over 33 knot winds 30 nautical miles.
    Radius of over 2 metre waves 120 nautical miles over northern semicircle, 90 nautical miles elsewhere.

    Forecast position and intensity at 071500 UTC
    Two zero point nine degrees north (20.9 N)
    One one six point three degrees east (116.3 E)
    Maximum winds 50 knots.

    Forecast position and intensity at 081500 UTC
    Two zero point nine degrees north (20.9 N)
    One one five point eight degrees east (115.8 E)
    Maximum winds 55 knots.

    Forecast position and intensity at 091500 UTC
    Two zero point five degrees north (20.5 N)
    One one five point three degrees east (115.3 E)
    Maximum winds 60 knots.

    Forecast position and intensity at 101500 UTC
    One nine point nine degrees north (19.9 N)
    One one three point three degrees east (113.3 E)
    Maximum winds 45 knots.

    Forecast position and intensity at 111500 UTC
    One nine point two degrees north (19.2 N)
    One one zero point two degrees east (110.2 E)
    Maximum winds 30 knots.



    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 07/Oct/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.4 C
Minimum Air Temperature                     25.9 C
Grass Minimum Temperature                   25.1 C
Relative Humidity                        58 - 95 Percent
Rainfall                                    16.7 mm 
Total rainfall since 1st January          2376.9 mm
Against an average of                     2268.3 mm

Other Stations                Min                  Max
King's Park                  25.1 C               32.3 C
Wong Chuk Hang               24.7 C               32.2 C
Ta Kwu Ling                  24.0 C               33.2 C
Lau Fau Shan                 24.4 C               31.1 C
Tai Po                       24.6 C               30.8 C
Sha Tin                      25.7 C               32.3 C
Tuen Mun                     25.3 C               32.7 C
Tseung Kwan O                24.6 C               33.9 C
Sai Kung                     25.8 C               31.4 C
Cheung Chau                  24.1 C               33.3 C
Chek Lap Kok                 26.7 C               32.5 C
Tsing Yi                     26.1 C               33.7 C
Shek Kong                    24.9 C               33.6 C
Tsuen Wan Ho Koon            24.6 C               30.6 C
Tsuen Wan Shing Mun Valley   25.0 C               33.1 C
Hong Kong Park               24.8 C               32.8 C
Shau Kei Wan                 24.4 C               33.0 C
Kowloon City                 25.5 C               33.1 C
Happy Valley                 25.3 C               34.1 C
Wong Tai Sin                 26.1 C               33.7 C
Stanley                      25.5 C               33.4 C
Kwun Tong                    25.3 C               33.0 C
Sham Shui Po                 26.0 C               33.8 C
Kai Tak Runway Park          25.3 C               32.9 C
Yuen Long Park               25.3 C               33.7 C

Duration of sunshine (King's Park):              8.9 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 9.
 

Yesterday's (06 Oct 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 06 Oct
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