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

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Weather Information for South China Coastal Waters

Bulletin issued at 13:02 HKT 12/Nov/2017

At 1 p.m. at the Hong Kong Observatory the air temperature was 21 degrees Celsius and the relative humidity 95 per cent.
During the past hour the mean UV Index recorded at King's Park was 1. The intensity of UV radiation was low.

The air temperatures at other places were:

King's Park 21 degrees;
Wong Chuk Hang 21 degrees;
Ta Kwu Ling 24 degrees;
Lau Fau Shan 24 degrees;
Tai Po 23 degrees;
Sha Tin 23 degrees;
Tuen Mun 23 degrees;
Tseung Kwan O 21 degrees;
Sai Kung 22 degrees;
Cheung Chau 21 degrees;
Chek Lap Kok 22 degrees;
Tsing Yi 22 degrees;
Shek Kong 23 degrees;
Tsuen Wan Ho Koon 22 degrees;
Tsuen Wan Shing Mun Valley 23 degrees;
Hong Kong Park 21 degrees;
Shau Kei Wan 20 degrees;
Kowloon City 21 degrees;
Happy Valley 21 degrees;
Wong Tai Sin 21 degrees;
Stanley 20 degrees;
Kwun Tong 21 degrees;
Sham Shui Po 22 degrees;
Kai Tak Runway Park 21 degrees;
Tai Mei Tuk 23 degrees.

Between 11:45 a.m. and 12:45 p.m., the rainfall recorded in various regions were:

Southern District 3 to 16 mm;
Central & Western District 4 to 7 mm;
Eastern District 1 to 7 mm;
Wan Chai 4 to 5 mm;
Islands District 1 to 5 mm;
Yau Tsim Mong 1 to 3 mm;
Sham Shui Po 1 to 3 mm;
Kowloon City 1 to 3 mm;
Kwai Tsing 0 to 2 mm;
Yuen Long 0 to 1 mm;
Sai Kung 0 to 1 mm;
Tuen Mun 0 to 1 mm;
Tsuen Wan 0 to 1 mm.

Here is the information on Tropical Depression Haikui at noon:
Location: 17.6 degrees north, 112.7 degrees east.


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


Climatological Information for 12 Nov


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 12:45 HKT 12/Nov/2017

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

The northeast monsoon is affecting the coast of southeastern China. Meanwhile, a broad band of clouds is covering the region. Locally, a few millimetres of rainfall were recorded over the urban areas and Lantau Island around noon.

At noon, Tropical Depression Haikui was centred about 90 kilometres north-northeast of Xisha. It is forecast to move west or west-southwest at about 12 kilometres per hour across the central part of the South China Sea and further weaken.

Weather forecast for this afternoon and tonight

Cloudy with occasional rain. Moderate to fresh easterly winds, occasionally strong offshore.

Outlook : Mainly cloudy in the next couple of days. Brighter in the latter part of this week.


(The above forecast period is valid up to 23:59 HKT today, 12/11/2017; 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 09:00 HKT 12/Nov/2017

GALE WARNING AREAS: HONG KONG, KWANGTUNG, TAIWAN STRAIT, PRATAS AND PARACEL.

GENERAL SITUATION AT 112100 UTC:
FOR DETAILS ON TROPICAL STORM HAIKUI (1724), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS. AN INTENSE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 120100 UTC:

HONG KONG= E 6-7, OCNL 8. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL NE 2 M. TEMP 25-22 C. =
KWANGTUNG= E TO NE 6-7, OCNL 8. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL NE 2-3 M, SE 2-3 M. =
TAIWAN STRAIT= NE 6-7, 8 AT FIRST. RAIN PATCHES. SEA 3-4 M, 6 M AT FIRST. SWELL NE 2-3 M. =
BASHI= E TO NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS IN W. SEA 3-4 M. SWELL NE 3-4 M. =
PRATAS= E TO NE 6-7, OCNL 8 AT FIRST. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 6 M AT FIRST. SWELL NE 3-4 M. =
BALINTANG= E TO NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS IN W. SEA 3-4 M. SWELL NE 3-4 M. =
SCARBOROUGH= E TO SE 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL NE 3-4 M. =
PARACEL= CYCLONIC UP TO 9, E TO SE 7 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 8 M, 4 M LATER. SWELL NE 3-4 M, SE 3 M. =
TONKIN= NE 5-6. RAIN PATCHES. SEA 2-3 M. SWELL NE 2 M. =
DANANG= NE 6-7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS LATER. SEA 3-4 M. SWELL NE 2-3 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 12:30 HKT 12/Nov/2017

Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 12 November 2017

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

Weather Situation:
The northeast monsoon is affecting the south China coastal waters.

At noon, Tropical Depression Haikui with maximum sustained winds of about 55 kilometres per hour near its centre was located at 17.6 degrees north, 112.7 degrees east. It is forecast to move west or west-southwest at about 12 kilometres per hour across the central part of the South China Sea and further weaken.

Area forecasts for the next 24 hours

Hong Kong Adjacent Waters:
East force 6 to 7, occasionally force 8.
Isolated squally showers and thunderstorms.
Rough to very rough seas.

Nan'ao and Shanwei:
East to northeast force 6 to 7.
Scattered squally showers and thunderstorms.
Rough seas.

South of Hong Kong and Shangchuan Dao:
East to northeast force 6 to 7, occasionally force 8.
Scattered squally showers and thunderstorms.
Rough to very rough seas.

Outlook for the next 48 hours
East to northeasterly winds of force 6 to 7. Scattered squally showers and thunderstorms at first.

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

Waglan Island Wind east-northeast force 5
  Visibility 4700 Metres

Shantou Wind east-northeast force 2
  Visibility 28 Kilometres

Dongsha Wind northeast force 4
  Visibility 9 Kilometres

Huangmaozhou Wind east-northeast force 5

Macau Wind east-northeast force 2
  Visibility 6 Kilometres

Xisha Wind north-northeast force 2
  Visibility 9 Kilometres


WEATHER FORECAST FOR LOCAL AVIATION
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Weather Forecast for Local Aviation

Bulletin issued at 10:30 HKT 12/NOV/2017
(Next update at 17:30 HKT 12/NOV/2017)
I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN INTENSE NORTHEAST MONSOON IS AFFECTING THE
     SOUTH CHINA COASTAL AREAS. TROPICAL STORM HAIKUI
     HAS WEAKENED INTO A TROPICAL DEPRESSION. AT 10
     A.M., HAIKUI WAS LOCATED AT 17.7 DEGREES NORTH,
     112.8 DEGREES EAST. IT IS FORECAST TO MOVE WEST
     OR WEST-SOUTHWEST AT ABOUT 6 KNOTS ACROSS THE
     CENTRAL PART OF THE SOUTH CHINA SEA AND WEAKEN
     GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  080/10-15
       OFFSHORE:  070/25-30                            23-26
   B.   2000 FT:  080/20-25                            19
   C.   5000 FT:  070/25                               17
   D.  10000 FT:  160/10                               9
   E.  18000 FT:  270/10                               MS4
   F.  24000 FT:  270/30                               MS14
   G.  30000 FT:  270/35                               MS29
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      3000-3700FT.
   I. WEATHER       : 
      CLOUDY WITH A FEW RAIN PATCHES. LOCALIZED MIST
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT BKN 8000 FT
   K. VISIBILITY    : 7 KM. TEMPO 4000 M IN RAIN OR MIST.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 9400 FT
   M. TURBULENCE    : MOD TO SEV
   N. SEA STATE     : 4.0-5.5 M     SEA TEMPERATURE    : 24 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EASTERLY WINDS, STRONG
     OFFSHORE. CLOUDY WITH A FEW RAIN PATCHES.=
===================================================================
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 13:00 HKT on 12 Nov 17

VHHK SIGMET 1 VALID 120100/120500 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1642 E11400 - N1906 E11154 - N2142 E11600 - N2212 E11730 - N2100 E11730 TOP FL480 MOV W 05KT NC= VHHK SIGMET 2 VALID 120500/120900 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1642 E11400 - N1854 E11200 - N2130 E11600 - N2206 E11730 - N2100 E11730 TOP FL420 MOV W 05KT 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: <12 Nov 2017> 

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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South China Coastal Waters |  Marine Forecast
Severe Weather Information Centre

Bulletin issued at 12:30 HKT 12/Nov/2017


Tropical Cyclone Warning

At 120300 UTC, Tropical Depression Haikui (1724) with central pressure 998 hectopascals was centred within 60 nautical miles of one seven point six degrees north (17.6 N) one one two point seven degrees east (112.7 E) and is forecast to move west or west-southwest at about 6 knots for the next 24 hours.

Maximum winds near the centre are estimated to be 30 knots.

Radius of over 2 metre waves 60 nautical miles.

Forecast position and intensity at 130300 UTC
Dissipated over sea.




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 12/Nov/2017
HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     26.5 C
Minimum Air Temperature                     23.4 C
Grass Minimum Temperature                   22.8 C
Relative Humidity                        71 - 82 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2541.5 mm
Against an average of                     2349.5 mm

Other Stations                Min                  Max
King's Park                  22.8 C               27.4 C
Wong Chuk Hang               23.5 C               27.5 C
Ta Kwu Ling                  21.0 C               29.1 C
Tai Po                       22.2 C               26.3 C
Sha Tin                      22.5 C               27.6 C
Tuen Mun                     22.5 C               28.1 C
Tseung Kwan O                22.3 C               27.2 C
Sai Kung                     23.2 C               26.6 C
Cheung Chau                  22.7 C               27.6 C
Chek Lap Kok                 24.1 C               29.4 C
Tsing Yi                     23.7 C               27.7 C
Shek Kong                    21.8 C               28.3 C
Tsuen Wan Ho Koon            21.6 C               26.3 C
Tsuen Wan Shing Mun Valley   22.0 C               27.9 C
Hong Kong Park               23.3 C               26.4 C
Shau Kei Wan                 22.7 C               26.1 C
Kowloon City                 22.7 C               27.5 C
Happy Valley                 23.3 C               27.7 C
Wong Tai Sin                 22.7 C               28.2 C
Stanley                      22.9 C               26.8 C
Kwun Tong                    22.5 C               26.4 C
Sham Shui Po                 23.7 C               27.7 C
Kai Tak Runway Park          23.6 C               26.7 C
Tai Mei Tuk               22.4 C               28.3 C

Duration of sunshine (King's Park):              1.5 H
The mean UV index recorded at King's Park yesterday was 2,
the UV intensity was Low.
The maximum UV index for yesterday was 4.
Sea surface temperature (Waglan Island):        24.5 C 

Yesterday's (11 Nov 2017) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 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                           0.08
Tap Mun                             0.09
Kat O                               0.09
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.12
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.09
King's Park                         0.15
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 11 Nov
Last revision date: <12 Nov 2017> 

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