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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 09:02 HKT 21/Nov/2018

At 9 a.m. at the Hong Kong Observatory the air temperature was 23 degrees Celsius and the relative humidity 83 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 24 degrees;
Wong Chuk Hang 25 degrees;
Ta Kwu Ling 23 degrees;
Lau Fau Shan 23 degrees;
Tai Po 25 degrees;
Sha Tin 24 degrees;
Tuen Mun 24 degrees;
Tseung Kwan O 23 degrees;
Sai Kung 24 degrees;
Cheung Chau 25 degrees;
Chek Lap Kok 25 degrees;
Tsing Yi 24 degrees;
Shek Kong 25 degrees;
Tsuen Wan Ho Koon 23 degrees;
Tsuen Wan Shing Mun Valley 25 degrees;
Hong Kong Park 24 degrees;
Shau Kei Wan 24 degrees;
Kowloon City 25 degrees;
Happy Valley 25 degrees;
Wong Tai Sin 25 degrees;
Stanley 23 degrees;
Kwun Tong 24 degrees;
Sham Shui Po 26 degrees;
Kai Tak Runway Park 24 degrees;
Yuen Long Park 25 degrees;
Tai Mei Tuk 25 degrees.

Between midnight and 9 a.m. the minimum temperature was 22.2 degrees Celsius at the Hong Kong Observatory.

Here is the information on Tropical Depression at 9 a.m.:
Location: 10.9 degrees north, 123.3 degrees east.


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


Climatological Information for 21 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 08:45 HKT 21/Nov/2018

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

The northeast monsoon is affecting southern China. Meanwhile, pressure over central China is rising. A replenishment of the monsoon is expected to reach the south China coastal areas later today.

At 8 a.m., the tropical depression over the Philippines was centred about 480 kilometres southeast of Manila. It is forecast to move west at about 20 kilometres per hour across the central to southern parts of the Philippines.

Weather forecast for today

Sunny periods and relatively low visibility. The maximum temperature will be about 25 degrees. Moderate easterly winds. Becoming northerlies with a few rain patches later and temperatures falling to around 20 degrees at midnight.

Outlook : Becoming cool appreciably tomorrow morning. Dry with sunny periods in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 21/11/2018; 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 21/Nov/2018

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

GENERAL SITUATION AT 202100 UTC:
AN INTENSE NORTHEAST MONSOON IS EXPECTED TO AFFECT THE FORECAST AREAS LATER. FOR DETAILS ON TROPICAL DEPRESSION OVER THE PHILIPPINES, PLEASE REFER TO THE 3-HRLY SHIPPING WARNINGS.

MARINE FORECAST FOR 24 HOURS FROM 210100 UTC:

HONG KONG= E 6-7, BEC N UP TO 8. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA 3-4 M, BEC 6 M. SWELL NE 2 M, 3 M LATER. TEMP 25-20 C. =
KWANGTUNG= E 6-7, BEC N 7-8. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA 3-4 M, BEC 6 M. SWELL NE 2 M, 3 M LATER. =
TAIWAN STRAIT= E TO NE 5-6, BEC N 7-8. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA 2-3 M, BEC 4-6 M. SWELL NE 2-3 M. =
BASHI= E TO NE 6-7, N 8 LATER. ISOL SHOWERS AND TS. SEA 3-4 M, 6 M LATER. SWELL NE 2-3 M. =
PRATAS= E 6-7, N 8 LATER. ISOL SHOWERS AND TS. SEA 3-4 M, 6 M LATER. SWELL NE 2 M, 3 M LATER. =
BALINTANG= E TO NE 7-8. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL NE 2-3 M. =
SCARBOROUGH= E TO NE 7-8. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL NE 2-3 M. =
PARACEL= E 6-7, N 8 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS LATER. SEA 3-4 M, 6 M LATER. SWELL NE 2 M, 3 M LATER. =
TONKIN= N 7-8. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA 4-6 M. SWELL NE 2 M, 3 M LATER. =
DANANG= E 5-6, N 7-8 LATER. RAIN PATCHES. SEA 2-3 M, 4-6 M LATER. SWELL NE 2 M, 3 M LATER. =
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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9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

Bulletin issued at 09:30 HKT 21/Nov/2018

Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 21 November 2018

Warnings:
Gale force winds in all areas.

Weather Situation:
The northeast monsoon is affecting the south China coastal waters. A replenishment of the monsoon is expected to reach the region later today.

At 9 a.m., the tropical depression over the Philippines with maximum sustained winds of about 45 kilometres per hour near its centre was located near 10.9 degrees north, 123.3 degrees east. It is forecast to move west at about 20 kilometres per hour across the central to southern parts of the Philippines.

Area forecasts for the next 24 hours

Hong Kong Adjacent Waters:
East force 6 to 7, becoming north up to force 8.
Misty with a few rain patches.
Rough seas, becoming very rough.

Nan'ao and Shanwei:
East force 6 to 7, becoming north force 7 to 8 later.
Rough seas, becoming very rough later.

South of Hong Kong and Shangchuan Dao:
East force 6 to 7, becoming north force 7 to 8.
Rough seas, becoming very rough.

Outlook for the next 48 hours
Northerly winds of force 7 to 8.

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

Waglan Island Wind northeast force 4
  Visibility 14 Kilometres

Shantou Wind west-southwest force 2
  Visibility 7 Kilometres

Huangmaozhou Wind east force 6

Xisha Wind east-northeast force 2
  Visibility 22 Kilometres


WEATHER FORECAST FOR LOCAL AVIATION
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Weather Forecast for Local Aviation

Bulletin issued at 09:30 HKT 21/NOV/2018
(Next update at 12:30 HKT 21/NOV/2018)
I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON IS AFFECTING SOUTHERN
     CHINA.  MEANWHILE, PRESSURE OVER CENTRAL CHINA
     IS RISING.  A REPLENISHMENT OF THE MONSOON IS
     EXPECTED TO REACH THE SOUTH CHINA COASTAL AREAS
     LATER TODAY.
     AT 9 A.M., THE TROPICAL DEPRESSION OVER THE
     PHILIPPINES WAS CENTRED NEAR 10.9 DEGREES NORTH,
     123.3 DEGREES EAST.  IT IS FORECAST TO MOVE WEST
     AT ABOUT 10 KNOTS ACROSS THE CENTRAL TO SOUTHERN
     PARTS OF THE PHILIPPINES.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/10 BEC 360/15
       OFFSHORE:  090/15-20                            24-28
   B.   2000 FT:  150/15 BEC 040/15-20                 21
   C.   5000 FT:  220/10                               15
   D.  10000 FT:  280/15                               7
   E.  18000 FT:  250/30                               MS4
   F.  24000 FT:  270/35                               MS16
   G.  30000 FT:  270/45                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      1400 - 2000 FT.
   I. WEATHER       : 
      SUNNY PERIODS.  A FEW RAIN AND MIST PATCHES
      LATER.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3000 FT.
   K. VISIBILITY    : 9 KM.  TEMPO 3000 M IN RAIN/MIST.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 8200 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTH TO NORTHEASTERLY WINDS,
     STRONG OFFSHORE.  MAINLY CLOUDY WITH A FEW RAIN
     AND MIST 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.

There is no Significant Weather Information (SIGMET)

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: <21 Nov 2018> 

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 21/Nov/2018


Tropical Cyclone Warning

At 210000 UTC, the tropical depression over the Philippines with central pressure 1002 hectopascals was centred within 90 nautical miles of one zero point nine degrees north (10.9 N) one two three point five degrees east (123.5 E) and is forecast to move west at about 12 knots for the next 24 hours.

Maximum winds near the centre are estimated to be 25 knots.

Radius of over 2 metre waves 90 nautical miles.

Forecast position and intensity at 220000 UTC
One zero point nine degrees north (10.9 N)
One one eight point eight degrees east (118.8 E)
Maximum winds 30 knots.

Forecast position and intensity at 230000 UTC
One zero point eight degrees north (10.8 N)
One one four point one degrees east (114.1 E)
Maximum winds 45 knots.

Forecast position and intensity at 240000 UTC
One zero point eight degrees north (10.8 N)
One one zero point nine degrees east (110.9 E)
Maximum winds 55 knots.

Forecast position and intensity at 250000 UTC
One one point six degrees north (11.6 N)
One zero eight point eight degrees east (108.8 E)
Maximum winds 60 knots.

Forecast position and intensity at 260000 UTC
One three point one degrees north (13.1 N)
One zero seven point five degrees east (107.5 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 21/Nov/2018
HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     24.0 C
Minimum Air Temperature                     22.0 C
Grass Minimum Temperature                   21.6 C
Relative Humidity                        74 - 87 Percent
Rainfall                                     0.1 mm 
Total rainfall since 1st January          2087.7 mm
Against an average of                     2361.0 mm

Other Stations                Min                  Max
King's Park                  21.6 C               24.0 C
Wong Chuk Hang               21.4 C               24.7 C
Ta Kwu Ling                  19.4 C               26.5 C
Lau Fau Shan                 19.9 C               29.6 C
Tai Po                       20.2 C               23.0 C
Sha Tin                      20.8 C               24.0 C
Tuen Mun                     21.7 C               25.4 C
Tseung Kwan O                21.2 C               23.6 C
Sai Kung                     21.8 C               23.4 C
Cheung Chau                  21.6 C               25.0 C
Chek Lap Kok                 22.2 C               26.4 C
Tsing Yi                     22.3 C               25.5 C
Shek Kong                    21.2 C               26.6 C
Tsuen Wan Ho Koon            20.7 C               25.3 C
Tsuen Wan Shing Mun Valley   21.6 C               25.6 C
Hong Kong Park               21.5 C               24.5 C
Shau Kei Wan                 21.0 C               23.0 C
Kowloon City                 21.4 C               25.3 C
Happy Valley                 21.6 C               25.4 C
Wong Tai Sin                 21.5 C               24.7 C
Stanley                      21.2 C               23.5 C
Kwun Tong                    21.0 C               23.9 C
Sham Shui Po                 22.1 C               25.7 C
Kai Tak Runway Park          21.8 C               23.6 C
Tai Mei Tuk               20.5 C               24.1 C

Duration of sunshine (King's Park):              2.9 H
The mean UV index recorded at King's Park yesterday was 1,
the UV intensity was Low.
The maximum UV index for yesterday was 4.
 

Yesterday's (20 Nov 2018) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 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                           0.09
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                           0.13
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 in the past, the hourly mean ambient gamma radiation dose rate may vary between 0.06 and 0.3 microsievert per hour. (1 microsievert = 0.000001 sievert = 0.001 millisievert)
  2. Temporal variations are generally caused by changes in meteorological conditions such as rainfall, wind and barometric pressure.
  3. Spatial variations are generally caused by differences in the radioactive content of local rock and soil.
  4. The data displayed is provisional. Only limited data validation has been carried out.
Climatological Information for 20 Nov
Last revision date: <21 Nov 2018> 

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