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Bulletin issued at 00:02 HKT 21/Nov/2019

At midnight at the Hong Kong Observatory the air temperature was 21 degrees Celsius and the relative humidity 74 per cent.

The air temperatures at other places were:

King's Park 20 degrees;
Wong Chuk Hang 20 degrees;
Ta Kwu Ling 15 degrees;
Lau Fau Shan 18 degrees;
Tai Po 18 degrees;
Sha Tin 17 degrees;
Tuen Mun 19 degrees;
Tseung Kwan O 19 degrees;
Sai Kung 20 degrees;
Cheung Chau 19 degrees;
Chek Lap Kok 21 degrees;
Tsing Yi 20 degrees;
Shek Kong 17 degrees;
Tsuen Wan Ho Koon 17 degrees;
Tsuen Wan Shing Mun Valley 18 degrees;
Hong Kong Park 20 degrees;
Shau Kei Wan 20 degrees;
Kowloon City 20 degrees;
Happy Valley 21 degrees;
Wong Tai Sin 21 degrees;
Stanley 21 degrees;
Kwun Tong 20 degrees;
Sham Shui Po 20 degrees;
Kai Tak Runway Park 21 degrees;
Yuen Long Park 17 degrees;
Tai Mei Tuk 19 degrees.


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


Climatological Information for 21 Nov

Regional Weather in Hong Kong

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Bulletin updated at 00:00 HKT 21/Nov/2019

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

A dry northeast monsoon brought generally fine weather to southern China yesterday. Locally, it was mainly fine and dry. As the northeast monsoon moderates in the next few days, temperatures over Guangdong will rise gradually.

Besides, Severe Tropical Storm Kalmaegi weakened gradually into an area of low pressure over Luzon yesterday. The area of low pressure over the seas east of the Philippines intensified gradually into a tropical storm yesterday and was named Fung-wong. At 11 p.m. last night, Fung-wong was centred about 680 kilometres northeast of Manila. It is forecast to move northwest at about 18 kilometres per hour towards the vicinity of Luzon Strait.

Weather forecast for Hong Kong (Thursday, 21 Nov 2019)

Mainly fine. The minimum temperature in the morning will be about 20 degrees in the urban areas, and a few degrees lower in the New Territories. Dry during the day with a maximum temperature of around 25 degrees. Moderate east to northeasterly winds, occasionally fresh offshore.

Outlook : Mainly fine, dry during the day with temperatures rising gradually in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 21/11/2019; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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MARINE FORECAST
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 20/Nov/2019

GALE WARNING AREAS: KWANGTUNG, TAIWAN STRAIT, BASHI, PRATAS, BALINTANG AND SCARBOROUGH.

GENERAL SITUATION AT 200900 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 201300 UTC:

HONG KONG= E TO NE 4-5, OCNL 6. FINE. SEA UP TO 3 M. SWELL NE 2-3 M. TEMP 20-25 C. =
KWANGTUNG= E TO NE 5-6, 7-8 IN E. CLD. SEA 2-3 M, 4-6 M IN E. SWELL NE 3 M. =
TAIWAN STRAIT= NE 7-8. CLD. SEA 4-6 M. SWELL NE 3-5 M. =
BASHI= N TO NE 7-8. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL N TO NE 3-5 M. =
PRATAS= NE 6-7, OCNL 8. ISOL SHOWERS. SEA UP TO 6 M. SWELL NE 3-5 M. =
BALINTANG= N TO NE 7-8, OCNL 9 LATER. DOWN TO 500 M IN FRQ HEAVY SQUALLY SHOWERS AND TS. SEA 4-6 M, UP TO 8 M LATER. SWELL N TO NE 3-5 M. =
SCARBOROUGH= N TO NE 7-8. DOWN TO 1000 M IN OCNL SQUALLY SHOWERS AND TS. SEA 4-6 M. SWELL N TO NE 3-5 M. =
PARACEL= NE 6-7. ISOL SHOWERS. SEA 3-4 M. SWELL NE 3-5 M. =
TONKIN= N TO NE 4-5, OCNL 6. CLD. SEA UP TO 3 M. =
DANANG= E TO NE 4-5, OCNL 6. CLD. SEA UP TO 3 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.


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    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

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    Bulletin issued at 23:30 HKT 20/Nov/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 20 November 2019

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

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

    At 11 p.m., Tropical Storm Fung-wong with maximum sustained winds of about 65 kilometres per hour near its centre was located at 18.6 degrees north, 125.7 degrees east. It is forecast to move northwest at about 18 kilometres per hour towards the vicinity of Luzon Strait.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 4 to 5, occasionally force 6.
    Moderate to rough seas.

    Nan'ao:
    Northeast force 6 to 7, occasionally force 8.
    Rough to very rough seas.

    Shanwei:
    Northeast force 6 to 7.
    Rough seas.

    South of Hong Kong:
    East to northeast force 5 to 6.
    Moderate to rough seas.

    Shangchuan Dao:
    East to northeast force 4 to 5, occasionally force 6.
    Moderate to rough seas.

    Outlook for the next 48 hours
    Northeasterly winds of force 5 to 6, up to force 7 in east at first.

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

    Waglan Island Wind east-northeast force 4
      Visibility 17 Kilometres

    Shantou Wind east-northeast force 2
      Visibility 30 Kilometres

    Dongsha Wind north-northeast force 5
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 4

    Macau Wind east force 2
      Visibility 11 Kilometres

    Xisha Wind northeast force 3
      Visibility 13 Kilometres

  • Explanation of Seas or Sea Waves
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 20/NOV/2019
    (Next update at 01:30 HKT 21/NOV/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
     AT 4 P.M.,  TROPICAL DEPRESSION KALMAEGI WAS
     CENTRED AT 16.0 DEGREES NORTH, 120.7 DEGREES
     EAST. IT IS FORECAST TO MOVE SOUTHWEST AT ABOUT
     16 KNOTS AND DISSIPATE IN THE VICINITY OF LUZON.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  080/10-15
       OFFSHORE:  080/20-25                            22-18
   B.   2000 FT:  080/15-20                            17
   C.   5000 FT:  350/10                               10
   D.  10000 FT:  350/5                                6
   E.  18000 FT:  270/20                               MS4
   F.  24000 FT:  270/25                               MS14
   G.  30000 FT:  250/35                               MS30
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3500 FT
   K. VISIBILITY    : 10 KM.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 4800, 5800, 8400 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE.  MOD NEAR HILLS.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EAST TO NORTHEASTERLY WINDS,
     STRONG OFFSHORE. MAINLY FINE.=

    ===================================================================
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.

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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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    TROPICAL CYCLONE WARNING FOR SHIPPING
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    Tropical Cyclone Warning for Shipping

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    Bulletin issued at 12:30 HKT 20/Nov/2019


    Tropical Cyclone Warning

    Tropical Storm Kalmaegi (1926) has weakened into a Tropical Depression with central pressure 998 hectopascals. At 200300 UTC, it was centred within 90 nautical miles of one seven point zero degrees north (17.0 N) one two one point two degrees east (121.2 E) and is forecast to move southwest at about 16 knots for the next 24 hours.

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

    Radius of over 2 metre waves 120 nautical miles.

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

    Forecast position and intensity at 210300 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 21/Nov/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     24.0 C
Minimum Air Temperature                     19.4 C
Grass Minimum Temperature                   17.2 C
Relative Humidity                        55 - 74 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2382.7 mm
Against an average of                     2361.0 mm

Other Stations                Min                  Max
King's Park                  18.8 C               24.2 C
Wong Chuk Hang               18.1 C               24.0 C
Ta Kwu Ling                  14.9 C               24.9 C
Lau Fau Shan                 16.1 C               24.5 C
Tai Po                       16.7 C               23.1 C
Sha Tin                      17.2 C               24.1 C
Tseung Kwan O                16.7 C               24.6 C
Sai Kung                     18.4 C               23.0 C
Cheung Chau                  17.0 C               25.4 C
Chek Lap Kok                 18.8 C               23.6 C
Tsing Yi                     18.7 C               25.6 C
Shek Kong                    16.8 C               25.0 C
Tsuen Wan Ho Koon            16.1 C               22.9 C
Tsuen Wan Shing Mun Valley   17.5 C               25.5 C
Hong Kong Park               18.7 C               25.4 C
Shau Kei Wan                 18.3 C               23.8 C
Kowloon City                 18.3 C               24.7 C
Happy Valley                 18.1 C               25.2 C
Wong Tai Sin                 18.7 C               25.1 C
Stanley                      19.3 C               22.8 C
Kwun Tong                    18.3 C               23.6 C
Sham Shui Po                 18.3 C               26.3 C
Kai Tak Runway Park          18.8 C               25.3 C
Yuen Long Park               16.7 C               25.4 C
Tai Mei Tuk               17.8 C               25.1 C

Duration of sunshine (King's Park):              6.3 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 6.
 

Yesterday's (20 Nov 2019) 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                               0.11
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.12
Sha Tau Kok                         0.11
Kwun Tong                           0.13
Sai Wan Ho                          0.10
King's Park                         0.15
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.14
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
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