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Bulletin issued at 07:02 HKT 21/Feb/2017

At 7 a.m. at the Hong Kong Observatory the air temperature was 19 degrees Celsius and the relative humidity 89 per cent.

The air temperatures at other places were:

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


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


Local Weather Forecast
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Bulletin updated at 06:45 HKT 21/Feb/2017

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

A strong easterly airstream is affecting the coastal areas of Guangdong gradually. Meanwhile, it was foggy over the territory this morning. Visibility at Waglan Island once fell below 200 metres.

Weather forecast for today

Cloudy with a few rain patches. Foggy in the morning. It will be cooler with temperatures lingering around 20 degrees during the day. Moderate to fresh easterly winds, occasionally strong.

Outlook : Misty with a few rain patches tomorrow. Temperatures falling appreciably on Thursday. Morning temperatures will be around 12 and 13 degrees in the following few days.


(The above forecast period is valid up to 23:59 HKT today, 21/02/2017; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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MARINE FORECAST
Traditional Chinese Simplified Chinese

Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 20/Feb/2017

GALE WARNING AREA: TAIWAN STRAIT.

GENERAL SITUATION AT 200900 UTC:
AN EASTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 201300 UTC:

HONG KONG= E 4, 5-6 LATER. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA 2-3 M LATER. TEMP 17-21 C. =
KWANGTUNG= E 4, 5-6 LATER. DOWN TO 500 M IN FOG OR RAIN PATCHES. SEA 2-3 M LATER. =
TAIWAN STRAIT= NE 5, BEC 7-8. RAIN PATCHES. SEA 2 M, BEC 4-6 M. =
BASHI= E TO SE 5-6, OCNL 7. CLD. SEA 3 M. =
PRATAS= E TO SE 4-5, OCNL 6. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA 2 M. =
BALINTANG= E TO SE 5-6. CLD. SEA 2-3 M. =
SCARBOROUGH= E TO NE 4-5. CLD. SEA UP TO 2 M. =
PARACEL= E TO SE 4-5. DOWN TO 500 M IN FOG OR RAIN PATCHES IN N. SEA UP TO 2 M. =
TONKIN= SE 4-5, OCNL 6. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA 2 M. =
DANANG= SE 4-5. RAIN PATCHES. 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 06:30 HKT 21/Feb/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 6:30 a.m. on 21 February 2017

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

    Weather Situation:
    A strong easterly airstream is affecting the coastal waters of Guangdong gradually.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 4 to 5, occasionally force 6.
    A few rain patches. Foggy at first.
    Moderate to rough seas.

    Nan'ao:
    East force 5 to 6.
    Squally isolated showers and thunderstorms.
    Moderate to rough seas.

    Shanwei and South of Hong Kong:
    East force 5 to 6.
    Fog patches at first.
    Moderate to rough seas.

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

    Outlook for the next 48 hours
    East to southeasterly winds of force 5 to 6, becoming north to northeasterly winds of force 6 later.

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

    Waglan Island Wind east-northeast force 5
      Visibility 3500 Metres

    Shantou Wind east force 3
      Visibility 18 Kilometres

    Dongsha Wind east force 2
      Visibility 8 Kilometres

    Huangmaozhou Wind east-northeast force 5

    Macau Wind east-southeast force 2
      Visibility 800 Metres in fog

    Xisha Wind east-northeast force 1
      Visibility 19 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
  • Tidal Information

    • WEATHER FORECAST FOR LOCAL AVIATION
    Traditional Chinese Simplified Chinese

    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 21/FEB/2017
    (Next update at 9:00-9:30 HKT 21/FEB/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB. FOG.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE COAST OF
     GUANGDONG. BESIDES, PRESSURE IS RISING OVER
     SOUTHEASTERN CHINA. A STRONG EASTERLY AIRSTREAM
     WILL AFFECT THE COAST OF GUANGDONG GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/10
       OFFSHORE:  090/10-15
                  BECMG 090/15-20, OCNL 25             19-22
   B.   2000 FT:  160/10-15
                  BECMG 140/20-25                      17
   C.   5000 FT:  180/5-10
                  BECMG 180/15-20                      13
   D.  10000 FT:  230/30                               10
   E.  18000 FT:  250/25                               MS8
   F.  24000 FT:  250/40                               MS22
   G.  30000 FT:  250/65                               MS37
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW RAIN PATCHES. LOCALIZED FOG.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1200 FT SCT 3500 FT.
   K. VISIBILITY    : 7 KM. TEMPO 2500 M IN RAIN. TEMPO 600 M IN FOG.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.0-3.5 M     SEA TEMPERATURE    : 19 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EASTERLY WINDS, OCCASIONALLY
     STRONG. 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 06:35 HKT on 21 Feb 17

    VHHK SIGMET 1 VALID 202235/210235 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1948 E11630 - N1818 E11436 - N2000 E11436 - N2142 E11730 - N2100 E11730 TOP FL360 STNR 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/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     25.5 C
Minimum Air Temperature                     18.3 C
Grass Minimum Temperature                   18.0 C
Relative Humidity                        69 - 91 Percent
Rainfall                                      Trace 
Total rainfall since 1st January            13.0 mm
Against an average of                       64.3 mm

Other Stations                Min                  Max
King's Park                  17.8 C               26.0 C
Wong Chuk Hang               18.5 C               24.3 C
Ta Kwu Ling                  17.1 C               27.3 C
Lau Fau Shan                 16.7 C               24.6 C
Tai Po                       17.1 C               23.2 C
Sha Tin                      17.4 C               25.5 C
Tseung Kwan O                17.4 C               25.4 C
Sai Kung                     17.5 C               22.5 C
Cheung Chau                  17.5 C               23.3 C
Chek Lap Kok                 18.5 C               25.7 C
Tsing Yi                     18.1 C               25.8 C
Shek Kong                    17.5 C               27.1 C
Tsuen Wan Ho Koon            17.0 C               24.6 C
Tsuen Wan Shing Mun Valley   17.7 C               26.7 C
Hong Kong Park               17.8 C               23.4 C
Shau Kei Wan                 17.8 C               23.0 C
Kowloon City                 17.6 C               26.5 C
Happy Valley                 19.0 C               25.3 C
Wong Tai Sin                 18.3 C               27.2 C
Stanley                      18.4 C               22.9 C
Kwun Tong                    18.4 C               26.0 C
Sham Shui Po                 18.1 C               26.0 C
Kai Tak Runway Park          18.6 C               22.9 C
Yuen Long Park               17.4 C               26.0 C
Tai Mei Tuk               17.0 C               25.3 C

Duration of sunshine (King's Park):              5.5 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 8.
Sea surface temperature (Waglan Island):        18.2 C 

Yesterday's (20 Feb 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 20 Feb
     2003copy right image | Important notices | Privacy policy Last revision date: <21 Feb 2017> 

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