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

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Bulletin issued at 19:02 HKT 15/Sep/2017

At 7 p.m. at the Hong Kong Observatory the air temperature was 30 degrees Celsius and the relative humidity 72 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 29 degrees;
Wong Chuk Hang 29 degrees;
Ta Kwu Ling 29 degrees;
Lau Fau Shan 29 degrees;
Tai Po 29 degrees;
Sha Tin 29 degrees;
Tuen Mun 29 degrees;
Tseung Kwan O 27 degrees;
Sai Kung 28 degrees;
Cheung Chau 28 degrees;
Chek Lap Kok 30 degrees;
Tsing Yi 29 degrees;
Shek Kong 29 degrees;
Tsuen Wan Ho Koon 28 degrees;
Tsuen Wan Shing Mun Valley 29 degrees;
Hong Kong Park 29 degrees;
Shau Kei Wan 29 degrees;
Kowloon City 29 degrees;
Happy Valley 29 degrees;
Wong Tai Sin 29 degrees;
Stanley 29 degrees;
Kwun Tong 29 degrees;
Sham Shui Po 29 degrees;
Kai Tak Runway Park 29 degrees;
Yuen Long Park 29 degrees;
Tai Mei Tuk 29 degrees.

Here is the information on Typhoon Doksuri at 7 p.m.:
Location: 18.2 degrees north, 104.8 degrees east.


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


Climatological Information for 15 Sep


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 18:45 HKT 15/Sep/2017

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

The anticyclone aloft is gradually dominating southern China. Locally, the weather was very hot in the afternoon. Temperatures over many places rose to about 33 degrees.

Severe Typhoon Doksuri has weakened into a typhoon. At 4 p.m., Doksuri was centred about 300 kilometres east of Vientiane. It is forecast to move west-northwest at about 25 kilometres per hour across Indochina Peninsula and weaken gradually. Meanwhile, Severe Typhoon Talim was centred about 620 kilometres west-southwest of Kagoshima. It is forecast to move northeast at about 10 kilometres per hour across the East China Sea towards Japan.

Weather forecast for tonight and tomorrow

Mainly fine apart from isolated showers at first. Very hot and hazy during the day tomorrow. Temperatures will range between 28 and 33 degrees. Light winds.

Outlook : Fine and very hot on Sunday. Sunny periods early next week.


(The above forecast period is valid up to 23:59 HKT tomorrow, 16/09/2017; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)



MARINE FORECAST
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:45 HKT 15/Sep/2017

HURRICANE WARNING AREAS: TONKIN AND DANANG.
GALE WARNING AREA: PARACEL.

GENERAL SITUATION AT 142100 UTC:
FOR DETAILS ON SEVERE TYPHOON DOKSURI (1719) AND SEVERE TYPHOON TALIM (1718), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 150145 UTC:

HONG KONG= E 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL SE 3 M. TEMP 32-28 C. =
KWANGTUNG= E TO SE 5-6, 7 IN E. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-4 M. SWELL SE 5-7 M. =
TAIWAN STRAIT= SW 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL NE 5-7 M, SW 3-5 M. =
BASHI= SW 5-6, OCNL 7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL NE 3-5 M, SW 3-5 M. =
PRATAS= E TO SE 5-6, SW 4-5 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SE 5-7 M. =
BALINTANG= SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL NE 3 M, SW 3 M. =
SCARBOROUGH= S 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SE 5-7 M. =
PARACEL= S TO SE 8-9, 6 LATER. DOWN TO 1000 M IN OCNL HEAVY SQUALLY SHOWERS AND TS. SEA 6-8 M, 3 M LATER. SWELL NE 5-7 M, SE 5-7 M. =
TONKIN= CYCLONIC 11-12. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 6-8 M, BEC 14 M. SWELL SE 5 M. =
DANANG= CYCLONIC 11-12, BEC SE 9-10. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 12-14 M, BEC 8-10 M. SWELL SE 5-7 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.



SOUTH CHINA COASTAL WATERS
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South China Coastal Waters

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Bulletin issued at 19:30 HKT 15/Sep/2017

Weather information for south China coastal waters issued by the Hong Kong Observatory at 7:30 p.m. on 15 September 2017

Warnings:
Strong winds in Shangchuan Dao.

Weather Situation:
At 7 p.m., Typhoon Doksuri with maximum sustained winds of about 145 kilometres per hour near its centre was located near 18.2 degrees north, 104.8 degrees east. It is forecast to move west-northwest at about 25 kilometres per hour across Indochina Peninsula and weaken gradually. Meanwhile, Severe Typhoon Talim with maximum sustained winds of about 155 kilometres per hour near its centre was located at 28.6 degrees north, 125.3 degrees east. It is forecast to move northeast at about 10 kilometres per hour across the East China Sea towards Japan.

Area forecasts for the next 24 hours

Hong Kong Adjacent Waters:
East force 4.
Isolated showers. Some haze tomorrow.
Moderate seas.

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

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

Shangchuan Dao:
Southeast force 4 to 5, occasionally force 6.
Isolated showers and thunderstorms.
Moderate to rough seas.

Outlook for the next 48 hours
Southeasterly winds of force 4 to 5. Isolated showers and thunderstorms.

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

Waglan Island Wind south-southwest force 2
  Visibility 17 Kilometres

Shantou Wind south-southwest force 3
  Visibility 24 Kilometres

Dongsha Wind west-northwest force 2
  Visibility 10 Kilometres

Macau Wind south force 2
  Visibility 18 Kilometres

Xisha Wind southeast force 3
  Visibility 12 Kilometres


WEATHER FORECAST FOR LOCAL AVIATION
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Weather Forecast for Local Aviation

Bulletin issued at 17:30 HKT 15/SEP/2017
(Next update at 01:30 HKT 16/SEP/2017)
I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     SEVERE TYPHOON DOKSURI HAS WEAKEN INTO A
     TYPHOON. 
     AT 4 P.M., DOKSURI WAS CENTRED NEAR 17.9 DEGREES
     NORTH, 105.4 DEGREES EAST.  IT IS FORECAST TO
     MOVE WEST-NORTHWEST AT ABOUT 14 KNOTS ACROSS
     INDOCHINA PENINSULA AND WEAKEN GRADUALLY.
     MEANWHILE, SEVERE TYPHOON TALIM WAS CENTRED NEAR
     28.5 DEGREES NORTH, 125.2 DEGREES EAST.  IT IS
     FORECAST TO MOVE NORTHEAST AT ABOUT 5 KNOTS
     ACROSS THE EAST CHINA SEA TOWARDS JAPAN.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  120/5-10                             32-28
   B.   2000 FT:  120/10                               25
   C.   5000 FT:  060/10                               19
   D.  10000 FT:  250/10                               12
   E.  18000 FT:  240/10                               MS2
   F.  24000 FT:  320/10                               MS14
   G.  30000 FT:  280/15                               MS29
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY FINE APART FROM ISOLATED SHOWERS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT
   K. VISIBILITY    : 9 KM.  TEMPO 4000 M IN SHOWERS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 11600 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT  WINDS.  MAINLY FINE APART FROM ISOLATED
     SHOWER. LOCALISED 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.


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 07:30 HKT on 15 Sep 17

VHHK SIGMET 5 VALID 141930/142330 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1648 E11406 - N1642 E11400 - N1930 E11130 - N2124 E11130 - N2148 E11218 - N1900 E11342 - N1648 E11406 TOP FL420 MOV W 10KT NC= VHHK SIGMET 6 VALID 142330/150330 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1800 E11248 - N1930 E11130 - N2124 E11130 - N2154 E11236 - N1918 E11306 - N1800 E11248 TOP FL420 MOV W 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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Last revision date: <15 Sep 2017> 

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 18:31 HKT 15/Sep/2017


Tropical Cyclone Warning

At 150900 UTC, Severe Typhoon Talim (1718) with central pressure 950 hectopascals was centred within 60 nautical miles of two eight point six degrees north (28.6 N) one two five point three degrees east (125.3 E) and is forecast to move northeast at about 5 knots for the next 24 hours.

Maximum winds near the centre are estimated to be 85 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.

No further warnings on this Severe Typhoon will be issued by the Hong Kong Observatory unless it re-enters the Hong Kong area of responsibility.

Forecast position and intensity at 160900 UTC
Two nine point eight degrees north (29.8 N)
One two seven point one degrees east (127.1 E)
Maximum winds 75 knots.

Forecast position and intensity at 170900 UTC
Three three point nine degrees north (33.9 N)
One three two point nine degrees east (132.9 E)
Maximum winds 60 knots.

Forecast position and intensity at 180900 UTC
Become extratropical low.


Bulletin issued at 18:30 HKT 15/Sep/2017


Tropical Cyclone Warning

At 150900 UTC, Typhoon Doksuri (1719) with central pressure 965 hectopascals was centred within 60 nautical miles of one eight point zero degrees north (18.0 N) one zero five point four degrees east (105.4 E) and is forecast to move west-northwest at about 14 knots for the next 24 hours.

Maximum winds near the centre are estimated to be 70 knots.

Radius of over 33 knot winds 90 nautical miles over eastern semicircle, 60 nautical miles elsewhere.
Radius of over 47 knot winds 45 nautical miles.
Radius of over 63 knot winds 30 nautical miles.
Radius of over 2 metre waves 120 nautical miles.

Forecast position and intensity at 160900 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 15/Sep/2017
HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.5 C
Minimum Air Temperature                     27.6 C
Grass Minimum Temperature                   25.3 C
Relative Humidity                        54 - 76 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2348.7 mm
Against an average of                     2076.9 mm

Other Stations                Min                  Max
King's Park                  27.0 C               31.4 C
Wong Chuk Hang               27.7 C               31.7 C
Ta Kwu Ling                  25.5 C               32.7 C
Lau Fau Shan                 26.4 C               32.8 C
Tai Po                       27.4 C               31.0 C
Sha Tin                      27.9 C               32.3 C
Tuen Mun                     26.3 C               32.5 C
Tseung Kwan O                26.8 C               32.2 C
Sai Kung                     28.1 C               31.6 C
Cheung Chau                  26.7 C               32.7 C
Chek Lap Kok                 28.4 C               33.6 C
Tsing Yi                     28.0 C               32.7 C
Shek Kong                    27.3 C               32.6 C
Tsuen Wan Ho Koon            24.8 C               31.1 C
Tsuen Wan Shing Mun Valley   27.1 C               32.1 C
Hong Kong Park               27.5 C               32.0 C
Shau Kei Wan                 27.4 C               30.6 C
Kowloon City                 27.0 C               32.2 C
Happy Valley                 27.6 C               32.5 C
Wong Tai Sin                 26.4 C               32.4 C
Stanley                      27.6 C               30.6 C
Kwun Tong                    27.3 C               30.8 C
Sham Shui Po                 27.3 C               33.2 C
Kai Tak Runway Park          28.2 C               30.9 C
Yuen Long Park               27.0 C               33.7 C
Tai Mei Tuk               25.9 C               32.4 C

Duration of sunshine (King's Park):              6.8 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 8.
Sea surface temperature (Waglan Island):        29.1 C 

Yesterday's (14 Sep 2017) 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                             0.08
Kat O                               0.08
Yuen Ng Fan                         0.11
Tai Mei Tuk                         0.12
Sha Tau Kok                         0.10
Kwun Tong                           0.11
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 1987-2016, 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 14 Sep
Last revision date: <15 Sep 2017> 

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