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

Local Weather Forecast | Regional Temperature Forecast in HK
9-day Weather Forecast | UV Index Forecast
Weather Information for South China Coastal Waters

Bulletin issued at 15:18 HKT 05/Sep/2016

At 3 p.m. at the Hong Kong Observatory the air temperature was 26 degrees Celsius and the relative humidity 98 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.3. The intensity of UV radiation was low.

An area of thundery showers associated with a trough of low pressure is affecting the Pearl River Estuary. Locally, showers in the afternoon brought more than 50 millimetres of rainfall to Central and Western District, Kwai Tsing and Lantau Island. Members of the public should stay alert.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 4:30 p.m. today. Isolated thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

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

Between 1:45 and 2:45 p.m., the rainfall recorded in various regions were:

Kwai Tsing 22 to 32 mm;
Tsuen Wan 9 to 30 mm;
Islands District 1 to 29 mm;
Southern District 12 to 28 mm;
Central & Western District 11 to 25 mm;
Sha Tin 0 to 21 mm;
Sham Shui Po 14 to 19 mm;
Sai Kung 2 to 17 mm;
Kwun Tong 5 to 16 mm;
Wan Chai 10 to 14 mm;
Wong Tai Sin 9 to 12 mm;
Eastern District 6 to 11 mm;
Yuen Long 3 to 10 mm;
Tai Po 1 to 10 mm;
Kowloon City 7 to 9 mm;
Tuen Mun 2 to 9 mm;
Yau Tsim Mong 5 to 7 mm;
North District 0 to 7 mm.


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


Climatological Information for 5 Sep


Local Weather Forecast
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Local Weather Forecast RSS

Local Weather Forecast

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

Current Weather | Regional Temperature Forecast in HK |  9-day Weather Forecast
UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 14:45 HKT 05/Sep/2016

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

The trough of low pressure now over the northern part of the South China Sea is moving northwards gradually. The associated showers will continue to affect the coast of Guangdong. Locally, showers after midday generally brought more than 20 millimetres of rainfall to the territory, and rainfall even exceeded 50 millimetres over Central and Western District, Kwai Tsing and Lantau Island.

At noon, Tropical Depression Namtheun was centred about 210 kilometres north-northeast of Nagasaki. It is forecast to move northeast at about 25 kilometres per hour across the Sea of Japan and dissipate gradually.

Weather forecast for this afternoon and tonight

Cloudy with showers and isolated thunderstorms. Showers will be heavy at first. Moderate easterly winds, occasionally fresh offshore.

Outlook : A few showers and thunderstorms in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 05/09/2016; 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 09:00 HKT 05/Sep/2016

N0 WARNING.

GENERAL SITUATION AT 042100 UTC:
TROUGH 20N 106E 22N 119E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 050100 UTC:

HONG KONG= E 4-5. ISOL SHOWERS. SEA UP TO 2 M. TEMP 31-27 C. =
KWANGTUNG= E 4-5, SE 4-5 LATER. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
TAIWAN STRAIT= E TO NE 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M. =
BASHI= SW 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3 M. SWELL SW 2 M. =
PRATAS= SW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
BALINTANG= SW 5-6, OCNL 7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3 M. SWELL SW 2 M. =
SCARBOROUGH= S TO SW 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
PARACEL= SW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SW 2 M. =
TONKIN= W TO NW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= SW 4-5. DOWN TO 2000 M IN SCT 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.



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 13:45 HKT 05/Sep/2016

Weather information for south China coastal waters issued by the Hong Kong Observatory at 1:45 p.m. on 05 September 2016

Weather Situation:
A trough of low pressure is bringing unsettled weather to the south China coastal waters.

Area forecasts for the next 24 hours

Hong Kong Adjacent Waters:
East force 4 to 5.
Squally showers and thunderstorms. Showers will be heavy at times.
Moderate seas.

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

South of Hong Kong and Shangchuan Dao:
East to southeast force 4 to 5.
Scattered squally showers and thunderstorms.
Moderate seas.

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

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

Waglan Island Wind east-northeast force 6
  Visibility 1900 Metres

Shantou Wind east-northeast force 1
  Visibility 25 Kilometres

Dongsha Wind south force 1
  Visibility 6 Kilometres in rain

Huangmaozhou Wind east-northeast force 2

Xisha Wind west-southwest force 3
  Visibility 9 Kilometres in showers


WEATHER FORECAST FOR LOCAL AVIATION
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Weather Forecast for Local Aviation

Bulletin issued at 09:00 HKT 05/SEP/2016
(Next update at 17:30 HKT 05/SEP/2016)
I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.

II.  SYNOPSIS OF THE WEATHER SITUATION :
     A TROUGH OF LOW PRESSURE IS BRINGING UNSETTLED
     WEATHER TO THE SOUTH CHINA COASTAL AREAS.

III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  080/10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  080/15-20                            29-32
   B.   2000 FT:  080/15-20                            23
   C.   5000 FT:  090/15                               19
   D.  10000 FT:  080/15                               12
   E.  18000 FT:  100/20                               MS1
   F.  24000 FT:  070/15                               MS11
   G.  30000 FT:  060/15                               MS24
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      SUNNY INTERVALS WITH A FEW SHOWERS AND
      THUNDERSTORMS.  LOCALIZED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT  SCT 4000 FT.  TEMPO FEW CB 1000 FT
      SCT 2000 FT  BKN 4000 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 4000 M IN SHOWERS/MIST.
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 12000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS.
                      MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.0 M         SEA TEMPERATURE    : 27 DEG

IV.  FURTHER OUTLOOK: 
     MODERATE EAST TO SOUTHEASTERLY WINDS.  MAINLY
     CLOUDY WITH A FEW SHOWERS AND 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.


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 14:30 HKT on 05 Sep 16

VHHK SIGMET 2 VALID 050630/051030 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1800 E11500 - N1936 E11130 - N2124 E11130 - N2230 E11342 - N2236 E11730 - N2100 E11730 TOP FL450 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: <05 Sep 2016> 

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 21:30 HKT 19/Aug/2016


Tropical Cyclone Warning

At 191200 UTC, Tropical Storm Dianmu (1608) with central pressure 988 hectopascals was centred within 60 nautical miles of two zero point eight degrees north (20.8 N) one zero five point four degrees east (105.4 E) and is forecast to weaken and move west at about 14 knots for the next 24 hours.

Maximum winds near the centre are estimated to be 35 knots.

Radius of over 33 knot winds 60 nautical miles over eastern semicircle, 30 nautical miles elsewhere.
Radius of over 2 metre waves 150 nautical miles.

No further warnings on this Tropical Storm will be issued by the Hong Kong Observatory unless re-intensification takes place.

Forecast position and intensity at 201200 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 05/Sep/2016
HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     30.1 C
Minimum Air Temperature                     27.0 C
Grass Minimum Temperature                   26.8 C
Relative Humidity                        77 - 90 Percent
Rainfall                                      Trace 
Total rainfall since 1st January          2023.4 mm
Against an average of                     1949.0 mm

Other Stations                Min                  Max
King's Park                  26.3 C               30.2 C
Wong Chuk Hang               26.8 C               29.9 C
Ta Kwu Ling                  26.1 C               31.4 C
Lau Fau Shan                 25.7 C               30.8 C
Tai Po                       26.7 C               29.5 C
Sha Tin                      26.6 C               30.6 C
Tuen Mun                     26.4 C               29.1 C
Tseung Kwan O                25.6 C               29.1 C
Sai Kung                     26.8 C               28.8 C
Cheung Chau                  25.9 C               28.1 C
Chek Lap Kok                 27.8 C               32.7 C
Tsing Yi                     26.6 C               31.3 C
Shek Kong                    26.8 C               31.9 C
Tsuen Wan Ho Koon            25.4 C               29.5 C
Tsuen Wan Shing Mun Valley   26.4 C               30.7 C
Hong Kong Park               26.7 C               29.5 C
Shau Kei Wan                 26.2 C               28.2 C
Kowloon City                 26.2 C               31.2 C
Happy Valley                 27.0 C               30.1 C
Wong Tai Sin                 26.6 C               30.8 C
Stanley                      26.7 C               28.9 C
Kwun Tong                    26.5 C               28.7 C
Sham Shui Po                 26.9 C               31.3 C
Kai Tak Runway Park          26.8 C               29.2 C
Yuen Long Park               26.7 C               31.6 C

Duration of sunshine (King's Park):              3.1 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 10.
Sea surface temperature (Waglan Island):        28.5 C 

Yesterday's (04 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                         0.11
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 04 Sep
Last revision date: <05 Sep 2016> 

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