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Weather Information for South China Coastal Waters

Bulletin issued at 10:02 HKT 03/Nov/2017

At 10 a.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 50 per cent.
During the past hour the mean UV Index recorded at King's Park was 3. The intensity of UV radiation was moderate.

The air temperatures at other places were:

King's Park 25 degrees;
Wong Chuk Hang 27 degrees;
Ta Kwu Ling 24 degrees;
Lau Fau Shan 24 degrees;
Tai Po 25 degrees;
Sha Tin 26 degrees;
Tuen Mun 26 degrees;
Tseung Kwan O 27 degrees;
Sai Kung 24 degrees;
Cheung Chau 26 degrees;
Chek Lap Kok 26 degrees;
Tsing Yi 26 degrees;
Shek Kong 26 degrees;
Tsuen Wan Ho Koon 23 degrees;
Tsuen Wan Shing Mun Valley 27 degrees;
Hong Kong Park 25 degrees;
Shau Kei Wan 27 degrees;
Kowloon City 25 degrees;
Happy Valley 28 degrees;
Wong Tai Sin 27 degrees;
Stanley 26 degrees;
Kwun Tong 27 degrees;
Sham Shui Po 27 degrees;
Kai Tak Runway Park 27 degrees;
Yuen Long Park 26 degrees;
Tai Mei Tuk 26 degrees.

Here is the information on Severe Tropical Storm Damrey at 10 a.m.:
Location: 12.6 degrees north, 113.3 degrees east.


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


Climatological Information for 3 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 09:45 HKT 03/Nov/2017

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

A dry northeast monsoon is bringing fine weather to southern China. Meanwhile, a cloud band is covering the northeastern part of the South China Sea.

At 10 a.m., Severe Tropical Storm Damrey was centred about 270 kilometres north-northwest of Nansha Dao. It is forecast to move west at about 18 kilometres per hour across the southern part of the South China Sea and intensify gradually.

Weather forecast for today

Mainly fine and dry. Cloudy periods tonight. Moderate to fresh north to northeasterly winds.

Outlook : Windier and slightly cooler during the weekend.


(The above forecast period is valid up to 23:59 HKT today, 03/11/2017; 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 03/Nov/2017

GALE WARNING AREAS: HONG KONG, KWANGTUNG, TAIWAN STRAIT, BASHI, PRATAS, SCARBOROUGH, PARACEL, TONKIN AND DANANG.

GENERAL SITUATION AT 022100 UTC:
FOR DETAILS ON TROPICAL STORM DAMREY (1723), PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS. THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 030100 UTC:

HONG KONG= N TO NE 6-7, UP TO 8 LATER. RAIN PATCHES. SEA 3-4 M, UP TO 6 M LATER. SWELL NE 2 M. TEMP 26-21 C. =
KWANGTUNG= N TO NE 6-7, BEC 8. RAIN PATCHES. SEA 3-4 M, BEC 6 M. SWELL NE 2-3 M. =
TAIWAN STRAIT= N TO NE 6-7, BEC 8. RAIN PATCHES. SEA 3-4 M, BEC 6 M. SWELL NE 2-3 M. =
BASHI= NE 6-7, UP TO 8 LATER. ISOL SHOWERS AND TS. SEA 3-4 M, UP TO 6 M LATER. SWELL NE 3 M. =
PRATAS= N TO NE 6-7, BEC 8. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M, 6 M LATER. SWELL NE 3 M. =
BALINTANG= E TO NE 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL NE 3 M. =
SCARBOROUGH= E TO SE 6-7, OCNL 8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL NE 3 M, SE 3 M. =
PARACEL= N TO NE 7-8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL NE 3 M, SE 3 M. =
TONKIN= N 6-7, BEC 8. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS LATER. SEA 3-4 M, BEC 6 M. SWELL NE 2 M. =
DANANG= N 6-7, BEC 8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 3-4 M, BEC 6 M. SWELL NE 3 M, SE 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 09:30 HKT 03/Nov/2017

Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 03 November 2017

Warnings:
Gale force winds in all areas.

Weather Situation:
A replenishment of the northeast monsoon will reach the south China coastal waters today.

At 9 a.m., Severe Tropical Storm Damrey with maximum sustained winds of about 105 kilometres per hour near its centre was located at 12.7 degrees north, 113.4 degrees east. It is forecast to move west at about 18 kilometres per hour across the southern part of the South China Sea and intensify gradually.

Area forecasts for the next 24 hours

Hong Kong Adjacent Waters:
North to northeast force 6 to 7, up to force 8 later.
Rough seas, becoming rough to very rough later.

Nan'ao, Shanwei and South of Hong Kong:
North to northeast force 6 to 7, becoming force 8.
Rough seas, becoming very rough.

Shangchuan Dao:
North to northeast force 6 to 7, becoming force 8.
Isolated squally showers and thunderstorms.
Rough seas, becoming very rough.

Outlook for the next 48 hours
North to northeasterly winds of force 7 to 8. Isolated squally showers and thunderstorms.

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

Waglan Island Wind north force 4
  Visibility 20 Kilometres

Shantou Wind northeast force 1
  Visibility 13 Kilometres

Dongsha Wind northeast force 4
  Visibility 10 Kilometres

Huangmaozhou Wind northeast force 4

Macau Wind north force 4
  Visibility 8 Kilometres

Xisha Wind east-northeast force 3
  Visibility 14 Kilometres


WEATHER FORECAST FOR LOCAL AVIATION
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Weather Forecast for Local Aviation

Bulletin issued at 09:30 HKT 03/NOV/2017
(Next update at 17:30 HKT 03/NOV/2017)
I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A DRY NORTHEAST MONSOON IS BRINGING FINE WEATHER
     TO SOUTHERN CHINA. MEANWHILE, A CLOUD BAND IS
     COVERING THE NORTHEASTERN PART OF THE SOUTH
     CHINA SEA. AT 9 P.M., SEVERE TROPICAL STORM
     DAMREY WAS LOCATED NEAR 12.7 DEGREES NORTH,
     113.4 DEGREES EAST. IT IS FORECAST TO MOVE WEST
     AT ABOUT 10 KNOTS ACROSS THE SOUTHERN PART OF
     THE SOUTH CHINA SEA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  020/10-15
       OFFSHORE:  050/15-20, OCNL 25                   25-28
   B.   2000 FT:  020/20-25, OCNL 30                   19
   C.   5000 FT:  060/25                               16
   D.  10000 FT:  080/10                               7
   E.  18000 FT:  200/10                               MS5
   F.  24000 FT:  240/25                               MS16
   G.  30000 FT:  260/35                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 4000 FT
   K. VISIBILITY    : 7 KM.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 8800 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND  NEAR HILLS
   N. SEA STATE     : 1.5-2.5 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTH TO NORTHEASTERLY WINDS,
     OCCASIONALLY STRONG OFFSHORE AND ON HIGH GROUND.
     MAINLY 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 08:35 HKT on 03 Nov 17

VHHK SIGMET 1 VALID 030040/030440 VHHH- VHHK HONG KONG FIR EMBD TS FCST S OF N1818 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: <03 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
Current Weather |  Local Weather Forecast |  9-day Weather Forecast
South China Coastal Waters |  Marine Forecast
Severe Weather Information Centre

Bulletin issued at 09:30 HKT 03/Nov/2017


Tropical Cyclone Warning

At 030000 UTC, Severe Tropical Storm Damrey (1723) with central pressure 980 hectopascals was centred within 60 nautical miles of one two point seven degrees north (12.7 N) one one three point four degrees east (113.4 E) and is forecast to move west at about 10 knots for the next 24 hours.

Maximum winds near the centre are estimated to be 60 knots.

Radius of over 33 knot winds 90 nautical miles.
Radius of over 47 knot winds 30 nautical miles.
Radius of over 2 metre waves 150 nautical miles.

Forecast position and intensity at 040000 UTC
One two point two degrees north (12.2 N)
One zero nine point zero degrees east (109.0 E)
Maximum winds 60 knots.

Forecast position and intensity at 050000 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 03/Nov/2017
HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     27.8 C
Minimum Air Temperature                     20.9 C
Grass Minimum Temperature                   19.0 C
Relative Humidity                        47 - 82 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2540.9 mm
Against an average of                     2336.6 mm

Other Stations                Min                  Max
King's Park                  20.3 C               28.7 C
Wong Chuk Hang               18.5 C               28.5 C
Ta Kwu Ling                  15.0 C               29.3 C
Lau Fau Shan                 18.3 C               29.3 C
Tai Po                       18.3 C               27.2 C
Sha Tin                      17.3 C               28.2 C
Tuen Mun                     18.4 C               30.1 C
Tseung Kwan O                17.7 C               29.4 C
Sai Kung                     20.0 C               26.1 C
Cheung Chau                  19.4 C               27.4 C
Chek Lap Kok                 20.0 C               29.2 C
Tsing Yi                     18.9 C               29.2 C
Shek Kong                    16.6 C               29.9 C
Tsuen Wan Ho Koon            17.8 C               28.5 C
Tsuen Wan Shing Mun Valley   17.0 C               29.9 C
Shau Kei Wan                 20.2 C               28.5 C
Kowloon City                 20.0 C               29.3 C
Happy Valley                 18.2 C               29.1 C
Wong Tai Sin                 18.7 C               29.5 C
Kwun Tong                    19.7 C               28.3 C
Sham Shui Po                 19.0 C               29.6 C
Kai Tak Runway Park          20.5 C               28.3 C
Yuen Long Park               17.3 C               29.7 C
Tai Mei Tuk               19.1 C               28.8 C

Duration of sunshine (King's Park):              10.3 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 6.
Sea surface temperature (Waglan Island):        25.4 C 

Yesterday's (02 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                               0.10
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                        0.15

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 02 Nov
Last revision date: <03 Nov 2017> 

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