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Bulletin issued at 10:02 HKT 22/Nov/2017

At 10 a.m. at the Hong Kong Observatory the air temperature was 20 degrees Celsius and the relative humidity 70 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 20 degrees;
Wong Chuk Hang 22 degrees;
Ta Kwu Ling 19 degrees;
Lau Fau Shan 17 degrees;
Tai Po 18 degrees;
Sha Tin 19 degrees;
Tuen Mun 20 degrees;
Tseung Kwan O 22 degrees;
Sai Kung 19 degrees;
Cheung Chau 19 degrees;
Chek Lap Kok 20 degrees;
Tsing Yi 19 degrees;
Shek Kong 19 degrees;
Tsuen Wan Ho Koon 18 degrees;
Tsuen Wan Shing Mun Valley 21 degrees;
Hong Kong Park 20 degrees;
Shau Kei Wan 20 degrees;
Kowloon City 20 degrees;
Happy Valley 22 degrees;
Wong Tai Sin 20 degrees;
Stanley 22 degrees;
Kwun Tong 21 degrees;
Sham Shui Po 22 degrees;
Kai Tak Runway Park 21 degrees;
Yuen Long Park 20 degrees;
Tai Mei Tuk 22 degrees.


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


Climatological Information for 22 Nov

Regional Weather in Hong Kong

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Bulletin updated at 09:45 HKT 22/Nov/2017

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

The northeast monsoon persists over the south China coast. A replenishment of the monsoon will reach the region later today.

Weather forecast for today

Mainly fine. Moderate northerly winds, occasionally fresh offshore.

Outlook : Cooler in the morning and at night in the next few days.


(The above forecast period is valid up to 23:59 HKT today, 22/11/2017; 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 09:00 HKT 22/Nov/2017

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

GENERAL SITUATION AT 212100 UTC:
THE NORTHEAST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 220100 UTC:

HONG KONG= N TO NE 5-6. CLD. SEA 2-3 M. SWELL NE 2 M. TEMP 22-17 C. =
KWANGTUNG= NE 6-7, OCNL 8 IN E LATER. RAIN PATCHES. SEA 3-4 M, UP TO 6 M IN E LATER. SWELL NE 2-3 M. =
TAIWAN STRAIT= NE 6-7, 7-8 LATER. RAIN PATCHES. SEA 3-4 M, UP TO 6 M LATER. SWELL NE 3 M. =
BASHI= NE 6-7, OCNL 8 LATER. RAIN PATCHES. SEA 3-4 M, UP TO 6 M LATER. SWELL NE 2-3 M. =
PRATAS= NE 6-7, OCNL 8 LATER. RAIN PATCHES. SEA 3-4 M, UP TO 6 M LATER. SWELL NE 2-3 M. =
BALINTANG= NE 6-7, OCNL 8 LATER. RAIN PATCHES. SEA 3-4 M, UP TO 6 M LATER. SWELL NE 2-3 M. =
SCARBOROUGH= NE 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL NE 2-3 M. =
PARACEL= NE 6-7. ISOL SHOWERS. SEA 3-4 M. SWELL NE 2-3 M. =
TONKIN= N TO NE 6-7. ISOL SHOWERS. SEA 3-4 M. SWELL NE 2 M. =
DANANG= NE 6-7. ISOL SHOWERS AND TS. 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.


  • Map showing the 10 forecast areas
  • Tidal Information

    • 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 09:30 HKT 22/Nov/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 22 November 2017

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

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North to northeast force 5 to 6.
    Moderate to rough seas.

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

    South of Hong Kong and Shangchuan Dao:
    Northeast force 6 to 7.
    Rough seas.

    Outlook for the next 48 hours
    North to northeasterly winds of force 6 to 7, occasionally force 8.

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

    Waglan Island Wind north force 3
      Visibility 44 Kilometres

    Shantou Wind east-northeast force 1
      Visibility 30 Kilometres

    Dongsha Wind north-northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind north-northwest force 4

    Macau Wind north force 3
      Visibility 10 Kilometres

    Xisha Wind northeast force 3
      Visibility 12 Kilometres in showers

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
  • Descriptive Terms of Wind Speeds
  • Visibility Readings in Hong Kong Waters
  • Map showing forecast areas
  • Tidal Information

    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 09:30 HKT 22/NOV/2017
    (Next update at 17:30 HKT 22/NOV/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON PERSISTS OVER THE SOUTH
     CHINA COAST. A REPLENISHMENT OF THE MONSOON WILL
     REACH THE REGION LATER.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  360/10-15
       OFFSHORE:  360/15-20                            16-22
   B.   2000 FT:  360/15-20                            16
   C.   5000 FT:  290/10                               15
   D.  10000 FT:  270/20                               9
   E.  18000 FT:  260/25                               MS5
   F.  24000 FT:  290/35                               MS13
   G.  30000 FT:  270/40                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      1000-2500 FT
   I. WEATHER       : 
      MAINLY FINE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT
   K. VISIBILITY    : 8 KM.
   L. 0 DEG. C LEVEL: 14000 FT      10 DEG. C LEVEL(S) : 9400 FT
   M. TURBULENCE    : MOD OFFSHORE AND  NEAR HILLS
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 22 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE NORTHERLY WINDS, FRESH OFFSHORE. MAINLY
     CLOUDY.=

    ===================================================================
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 10:00 HKT on 15 Nov 17

    VHHK SIGMET Z99 VALID 150200/150210 VHHH- VHHK HONG KONG FIR THIS IS A TEST SIGMET, PLEASE DISREGARD=

    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

    There is no tropical cyclone warning for shipping*.




    *Tropical cyclone warnings for shipping are issued by the Hong Kong Observatory for tropical cyclones located within the area bounded by 105E and 125E , 10N and 30N.




    For other tropical cyclone related information, please visit the World Meteorological Organization Web Site - Severe Weather Information Centre.

    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 22/Nov/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     21.4 C
Minimum Air Temperature                     17.5 C
Grass Minimum Temperature                   18.8 C
Relative Humidity                        72 - 81 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January          2571.8 mm
Against an average of                     2364.2 mm

Other Stations                Min                  Max
King's Park                  16.8 C               21.5 C
Wong Chuk Hang               18.3 C               22.0 C
Ta Kwu Ling                  14.2 C               21.4 C
Tai Po                       14.8 C               20.6 C
Sha Tin                      15.7 C               21.3 C
Tuen Mun                     15.6 C               21.6 C
Tseung Kwan O                16.6 C               21.4 C
Sai Kung                     15.9 C               20.8 C
Cheung Chau                  16.5 C               22.0 C
Chek Lap Kok                 16.1 C               21.4 C
Tsing Yi                     17.5 C               22.1 C
Shek Kong                    15.0 C               21.7 C
Tsuen Wan Ho Koon            14.8 C               20.5 C
Tsuen Wan Shing Mun Valley   16.3 C               21.8 C
Hong Kong Park               18.0 C               21.2 C
Shau Kei Wan                 16.7 C               21.0 C
Kowloon City                 16.0 C               21.8 C
Happy Valley                 18.3 C               21.9 C
Wong Tai Sin                 15.9 C               21.7 C
Stanley                      17.5 C               21.9 C
Kwun Tong                    16.4 C               21.3 C
Sham Shui Po                 16.7 C               22.1 C
Kai Tak Runway Park          18.0 C               21.7 C
Yuen Long Park               15.0 C               21.5 C
Tai Mei Tuk               15.7 C               21.6 C

Duration of sunshine (King's Park):              0.6 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.
Sea surface temperature (Waglan Island):        22.8 C 

Yesterday's (21 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                         0.11
Kwun Tong                           0.12
Sai Wan Ho                          0.10
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 21 Nov
     2003copy right image | Important notices | Privacy policy Last revision date: <22 Nov 2017> 

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