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Bulletin issued at 13:02 HKT 21/Feb/2018

At 1 p.m. at the Hong Kong Observatory the air temperature was 19 degrees Celsius and the relative humidity 79 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 19 degrees;
Wong Chuk Hang 20 degrees;
Ta Kwu Ling 18 degrees;
Lau Fau Shan 18 degrees;
Tai Po 19 degrees;
Sha Tin 19 degrees;
Tuen Mun 19 degrees;
Tseung Kwan O 18 degrees;
Sai Kung 18 degrees;
Cheung Chau 19 degrees;
Chek Lap Kok 20 degrees;
Tsing Yi 20 degrees;
Shek Kong 21 degrees;
Tsuen Wan Ho Koon 19 degrees;
Tsuen Wan Shing Mun Valley 20 degrees;
Hong Kong Park 19 degrees;
Shau Kei Wan 18 degrees;
Kowloon City 19 degrees;
Happy Valley 19 degrees;
Wong Tai Sin 20 degrees;
Stanley 18 degrees;
Kwun Tong 18 degrees;
Sham Shui Po 20 degrees;
Kai Tak Runway Park 18 degrees;
Yuen Long Park 20 degrees;
Tai Mei Tuk 19 degrees.

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

North District 0 to 1 mm;
Yuen Long 0 to 1 mm.


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


Climatological Information for 21 Feb

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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

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UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 12:45 HKT 21/Feb/2018

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

A fresh easterly airstream is bringing cooler weather to the coastal areas of Guangdong. Locally, temperatures over most parts of the territory around noon were four to five degrees lower than those of yesterday.

Weather forecast for this afternoon and tonight

Mainly cloudy with one or two rain patches. Moderate to fresh easterly winds.

Outlook : A few rain patches and temperatures falling tomorrow. Appreciably cooler tomorrow night and on Friday morning.


(The above forecast period is valid up to 23:59 HKT today, 21/02/2018; 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 21/Feb/2018

GALE WARNING AREAS: TAIWAN STRAIT, BASHI AND BALINTANG.

GENERAL SITUATION AT 202100 UTC:
AN EASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS. TROUGH 24N 105E 23N 112E 26N 119E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 210100 UTC:

HONG KONG= E 4-5, UP TO 6 LATER. LGT RAIN PATCHES. DOWN TO 2000 M IN MIST PATCHES AT FIRST. SEA UP TO 2 M, UP TO 3 M LATER. TEMP 21-17 C. =
KWANGTUNG= E TO NE 5-6, UP TO 7 IN E LATER. DOWN TO 500 M IN FOG OR RAIN PATCHES IN W AT FIRST. SEA 2-3 M, UP TO 4 M LATER. =
TAIWAN STRAIT= NE 6-7, UP TO 8 LATER. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA 3-4 M, UP TO 6 M LATER. SWELL NE UP TO 2 M LATER. =
BASHI= E 6-7, NE UP TO 8 LATER. RAIN PATCHES. SEA 3-4 M, UP TO 6 M LATER. =
PRATAS= E 5-6, OCNL 7. RAIN PATCHES. SEA UP TO 4 M. =
BALINTANG= E 6-7, NE UP TO 8 LATER. RAIN PATCHES. SEA 3-4 M, UP TO 6 M LATER. =
SCARBOROUGH= NE 4-5, OCNL 6. FINE. SEA UP TO 3 M. =
PARACEL= E 4-5. DOWN TO 500 M IN FOG OR RAIN PATCHES IN N. SEA UP TO 2 M. =
TONKIN= E 4, NE 5-6 LATER. DOWN TO 500 M IN FOG OR RAIN PATCHES AT FIRST. SEA 2-3 M LATER. =
DANANG= E 4, OCNL 5. DOWN TO 500 M IN FOG OR RAIN PATCHES IN N. SEA UP TO 2 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 12:30 HKT 21/Feb/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 21 February 2018

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

    Weather Situation:
    An easterly airstream is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 4 to 5, up to force 6 later.
    A few light rain patches, mist patches at first.
    Moderate to rough seas.

    Nan'ao and Shanwei:
    East to northeast force 5 to 6, up to force 7 later.
    Moderate to rough seas.

    South of Hong Kong:
    East force 4 to 5, up to force 6 later.
    Moderate to rough seas.

    Shangchuan Dao:
    East force 4 to 5.
    Fog patches.
    Moderate seas.

    Outlook for the next 48 hours
    Northeasterly winds of force 6 to 7.

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

    Waglan Island Wind north-northeast force 4
      Visibility 8 Kilometres

    Shantou Wind east-northeast force 2
      Visibility 26 Kilometres

    Dongsha Wind north-northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 5

    Macau Wind southeast force 1
      Visibility 4900 Metres in mist

    Xisha Wind northeast force 2
      Visibility 24 Kilometres

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
  • Descriptive Terms of Wind Speeds
  • Visibility Readings in Hong Kong Waters
  • Map showing forecast areas
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 09:00 HKT 21/FEB/2018
    (Next update at 17:30 HKT 21/FEB/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE COASTAL
     AREAS OF GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  070/10-15
       OFFSHORE:  090/15-20                            19-22
   B.   2000 FT:  110/15                               15
   C.   5000 FT:  190/10                               14
   D.  10000 FT:  250/20                               6
   E.  18000 FT:  250/45                               MS8
   F.  24000 FT:  260/55                               MS19
   G.  30000 FT:  260/70                               MS32
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      1200 - 2100 FT.
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW LIGHT RAIN PATCHES.
      LOCALIZED HAZE/MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1200 FT  SCT 3000 FT  BKN 8000 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 3000 M IN RAIN/HAZE/MIST.
   L. 0 DEG. C LEVEL: 15000 FT      10 DEG. C LEVEL(S) : 7600 FT
   M. TURBULENCE    : MOD.
   N. SEA STATE     : 2.0 M         SEA TEMPERATURE    : 17 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EASTERLY WINDS.  CLOUDY WITH A
     FEW RAIN PATCHES.  LOCALIZED MIST.=

    ===================================================================
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 10:30 HKT on 10 Feb 18

    VHHK SIGMET 1 VALID 100230/100630 VHHH- VHHK HONG KONG FIR SEV TURB OBS WI N2000 E11636 - N1742 E11448 - N2000 E11448 - N2000 E11636 FL300/400 MOV E 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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    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 21/Feb/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     25.0 C
Minimum Air Temperature                     18.8 C
Grass Minimum Temperature                   18.0 C
Relative Humidity                        75 - 92 Percent
Rainfall                                      Trace 
Total rainfall since 1st January            62.2 mm
Against an average of                       64.3 mm

Other Stations                Min                  Max
King's Park                  18.2 C               26.3 C
Wong Chuk Hang               18.1 C               24.5 C
Ta Kwu Ling                  17.1 C               27.7 C
Lau Fau Shan                 18.4 C               23.2 C
Tai Po                       17.9 C               24.4 C
Tuen Mun                     19.5 C               26.5 C
Tseung Kwan O                17.4 C               24.8 C
Sai Kung                     17.7 C               22.7 C
Cheung Chau                  18.4 C               23.1 C
Chek Lap Kok                 19.3 C               25.4 C
Tsing Yi                     19.0 C               25.3 C
Shek Kong                    18.3 C               27.1 C
Tsuen Wan Ho Koon            18.3 C               24.8 C
Tsuen Wan Shing Mun Valley   18.3 C               26.6 C
Hong Kong Park               18.7 C               24.2 C
Shau Kei Wan                 17.1 C               24.2 C
Kowloon City                 18.6 C               25.9 C
Happy Valley                 18.4 C               26.0 C
Wong Tai Sin                 19.1 C               26.5 C
Stanley                      17.5 C               22.3 C
Kwun Tong                    18.1 C               25.6 C
Sham Shui Po                 19.6 C               25.1 C
Kai Tak Runway Park          17.8 C               21.4 C
Yuen Long Park               19.0 C               26.8 C
Tai Mei Tuk               17.9 C               26.7 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 6.
Sea surface temperature (Waglan Island):        17.1 C 

Yesterday's (20 Feb 2018) 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                               0.11
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 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 Feb
     2003copy right image | Important notices | Privacy policy Last revision date: <21 Feb 2018> 

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