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Bulletin issued at 11:02 HKT 21/Feb/2017

At 11 a.m. at the Hong Kong Observatory the air temperature was 18 degrees Celsius and the relative humidity 87 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.9. The intensity of UV radiation was low.

Please be reminded that:

The Strong Monsoon Signal has been issued.

The air temperatures at other places were:

King's Park 17 degrees;
Wong Chuk Hang 18 degrees;
Ta Kwu Ling 19 degrees;
Lau Fau Shan 24 degrees;
Tai Po 18 degrees;
Sha Tin 18 degrees;
Tuen Mun 20 degrees;
Tseung Kwan O 17 degrees;
Sai Kung 17 degrees;
Cheung Chau 17 degrees;
Chek Lap Kok 20 degrees;
Tsing Yi 18 degrees;
Shek Kong 19 degrees;
Tsuen Wan Ho Koon 18 degrees;
Tsuen Wan Shing Mun Valley 18 degrees;
Hong Kong Park 17 degrees;
Shau Kei Wan 17 degrees;
Kowloon City 17 degrees;
Happy Valley 18 degrees;
Wong Tai Sin 18 degrees;
Stanley 17 degrees;
Kwun Tong 17 degrees;
Sham Shui Po 19 degrees;
Kai Tak Runway Park 17 degrees;
Yuen Long Park 21 degrees;
Tai Mei Tuk 17 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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Local Weather Forecast

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 10:45 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. Locally, visibility in the harbour was below 5000 metres this morning.

Weather forecast for today

Cloudy with a few rain and mist patches. It will be cooler. Fresh easterly winds, strong offshore.

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)

Information on Tropical Cyclones

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Weather Information for Aviation

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MARINE FORECAST
Traditional Chinese Simplified Chinese

Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 21/Feb/2017

GALE WARNING AREA: TAIWAN STRAIT.

GENERAL SITUATION AT 202100 UTC:
AN EASTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 210100 UTC:

HONG KONG= E 5-6. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA 2-3 M. TEMP 20-17 C. =
KWANGTUNG= E 5-6. ISOL SHOWERS AND TS IN E. SEA 2-3 M. =
TAIWAN STRAIT= NE 7-8, 5-6 LATER. RAIN PATCHES. SEA 4-6 M, 2-3 M LATER. =
BASHI= E 5-6, OCNL 7. CLD. SEA 3 M. =
PRATAS= E 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. =
BALINTANG= E 5, OCNL 6. CLD. SEA 2-3 M. =
SCARBOROUGH= E TO NE 4-5. CLD. SEA UP TO 2 M. =
PARACEL= E TO SE 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
TONKIN= E TO SE 4-5, OCNL 6. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA 2 M. =
DANANG= SE 4-5. ISOL SHOWERS. 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 09:30 HKT 21/Feb/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 21 February 2017

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

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 5 to 6.
    A few rain and mist patches.
    Moderate to rough seas.

    Nan'ao, Shanwei and South of Hong Kong:
    East force 5 to 6.
    Isolated showers and thunderstorms.
    Moderate to rough seas.

    Shangchuan Dao:
    East to southeast force 4 to 5.
    Moderate seas.

    Outlook for the next 48 hours
    East to southeasterly winds of force 4 to 5, becoming north to northeasterly winds of force 6 later.

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

    Waglan Island Wind east-northeast force 6
      Visibility 3400 Metres

    Shantou Wind east-northeast force 2
      Visibility 22 Kilometres

    Dongsha Wind east force 2
      Visibility 9 Kilometres in thunderstorms

    Huangmaozhou Wind east-northeast force 6

    Macau Wind east-southeast force 2
      Visibility 4100 Metres

    Xisha Wind east-northeast force 1
      Visibility 12 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 09:30 HKT 21/FEB/2017
    (Next update at 17:30 HKT 21/FEB/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A STRONG EASTERLY AIRSTREAM IS AFFECTING THE
     COASTAL WATERS OF GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/15-20
       OFFSHORE:  080/20-25, OCNL 30 AT FIRST          19-21
   B.   2000 FT:  140/25-30, OCNL 35                   14
   C.   5000 FT:  190/20                               15
   D.  10000 FT:  230/25                               8
   E.  18000 FT:  250/30                               MS8
   F.  24000 FT:  240/40                               MS21
   G.  30000 FT:  240/65                               MS36
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      3300 - 4500 FT
   I. WEATHER       : 
      CLOUDY WITH A FEW RAIN PATCHES. LOCALIZED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 800 FT SCT 2000 FT.
   K. VISIBILITY    : 7 KM. TEMPO 3500 M IN RAIN/MIST
   L. 0 DEG. C LEVEL: 14000 FT      10 DEG. C LEVEL(S) : 9600 FT
   M. TURBULENCE    : MOD TO SEV
   N. SEA STATE     : 3.0-4.0 M     SEA TEMPERATURE    : 18 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EASTERLY WINDS, OCCASIONALLY
     STRONG OFFSHORE. 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.

    The latest significant weather information
    issued by the Hong Kong Observatory at 10:30 HKT on 21 Feb 17

    VHHK SIGMET 1 VALID 210235/210635 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1712 E11424 - N2112 E11442 - N2242 E11730 - N2100 E11730 TOP FL360 MOV NE 10KT 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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