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Bulletin issued at 04:02 HKT 24/Feb/2017

At 4 a.m. at the Hong Kong Observatory the air temperature was 14 degrees Celsius and the relative humidity 83 per cent.

Please be reminded that:

The Cold Weather Warning is now in force. Cold weather might cause adverse health effects. Members of the public should take care to keep warm.

The air temperatures at other places were:

King's Park 13 degrees;
Wong Chuk Hang 13 degrees;
Ta Kwu Ling 10 degrees;
Lau Fau Shan 11 degrees;
Tai Po 10 degrees;
Sha Tin 11 degrees;
Tuen Mun 12 degrees;
Tseung Kwan O 12 degrees;
Sai Kung 12 degrees;
Cheung Chau 12 degrees;
Chek Lap Kok 11 degrees;
Tsing Yi 12 degrees;
Shek Kong 11 degrees;
Tsuen Wan Ho Koon 10 degrees;
Tsuen Wan Shing Mun Valley 11 degrees;
Hong Kong Park 13 degrees;
Shau Kei Wan 13 degrees;
Kowloon City 11 degrees;
Happy Valley 14 degrees;
Wong Tai Sin 11 degrees;
Stanley 14 degrees;
Kwun Tong 13 degrees;
Sham Shui Po 12 degrees;
Kai Tak Runway Park 13 degrees;
Yuen Long Park 11 degrees;
Tai Mei Tuk 11 degrees.


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


Climatological Information for 24 Feb

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 03:45 HKT 24/Feb/2017

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

An intense northeast monsoon is bringing cold weather to Guangdong.

Weather forecast for today

Cloudy to overcast with a few rain patches. Becoming cold with temperatures falling gradually from about 14 degrees at first to about 12 degrees. Moderate to fresh north to northeasterly winds.

Outlook : Cold in the morning and at night with a few rain patches in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 24/02/2017; 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 23/Feb/2017

GALE WARNING AREA: TAIWAN STRAIT.

GENERAL SITUATION AT 230900 UTC:
COLD FRONT 18N 108E 20N 116E 22N 125E S 10KT.

MARINE FORECAST FOR 24 HOURS FROM 231300 UTC:

HONG KONG= N TO NE 4-5. RAIN PATCHES. SEA UP TO 2 M. TEMP 15-12 C. =
KWANGTUNG= N TO NE 5-6, OCNL 7 IN E. RAIN PATCHES. SEA 2-3 M, UP TO 4 M IN E. SWELL NE 2 M IN E. =
TAIWAN STRAIT= N TO NE 6-7, OCNL 8. RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
BASHI= N TO NE 6-7. RAIN PATCHES. SEA 3-4 M. SWELL NE 2 M. =
PRATAS= NE 5-6, OCNL 7. CLD. SEA UP TO 4 M. SWELL NE 2 M. =
BALINTANG= N TO NE 5-6, OCNL 7. CLD. SEA UP TO 4 M. SWELL NE 2 M. =
SCARBOROUGH= NE 4-5, OCNL 6. CLD. SEA UP TO 3 M. =
PARACEL= E TO NE 4-5, UP TO 6 IN N. 4000 M IN MIST OR RAIN PATCHES AT FIRST. SEA UP TO 3 M IN N. =
TONKIN= N TO NE 5-6. RAIN PATCHES. SEA 2-3 M. =
DANANG= E TO NE 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 03:30 HKT 24/Feb/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 24 February 2017

    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 intense northeast monsoon is affecting the coastal waters of Guangdong.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North to northeast force 4 to 5, occasionally force 6.
    A few rain patches.
    Moderate to rough seas.

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

    Shanwei:
    North to northeast force 5 to 6, occasionally force 7.
    Moderate to rough seas.

    South of Hong Kong and Shangchuan Dao:
    North to northeast force 5 to 6.
    Moderate to rough seas.

    Outlook for the next 48 hours
    North to 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 north force 3
      Visibility 9 Kilometres

    Shantou Wind southeast force 1
      Visibility 30 Kilometres

    Dongsha Wind northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind north-northeast force 4

    Macau Wind north force 3
      Visibility 1900 Metres

    Xisha Wind east-northeast force 2
      Visibility 29 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 24/FEB/2017
    (Next update at 9:00-9:30 HKT 24/FEB/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE INTENSE NORTHEAST MONSOON ASSOCIATED WITH A
     COLD FRONT IS AFFECTING THE COASTAL WATERS OF
     GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  360/10-15
       OFFSHORE:  350/15, OCNL 20                      12-14
   B.   2000 FT:  080/20                               11
   C.   5000 FT:  230/20                               13
   D.  10000 FT:  260/30                               5
   E.  18000 FT:  270/50                               MS8
   F.  24000 FT:  270/60                               MS16
   G.  30000 FT:  270/70                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2400 - 3700 FT
   I. WEATHER       : 
      CLOUDY  WITH A FEW MIST AND RAIN PATCHES.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT SCT 2000 FT
   K. VISIBILITY    : 7 KM. TEMPO 4000 M IN RAIN/MIST.
   L. 0 DEG. C LEVEL: 14500 FT      10 DEG. C LEVEL(S) : 7800, 8400 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS
   N. SEA STATE     : 1.5-2.0 M     SEA TEMPERATURE    : 18 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTHERLY WINDS. 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
    Traditional Chinese Simplified Chinese

    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 05:12 HKT on 22 Feb 17

    VHHK SIGMET 6 VALID 211715/212115 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2345 E11730 - N2100 E11730 - N2100 E11330 - N2200 E11300 - N2245 E11500 - N2345 E11730 TOP FL400 MOV NE 10KT NC= VHHK SIGMET 7 VALID 212115/220115 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2345 E11730 - N2230 E11730 - N2130 E11430 - N2245 E11430 - N2345 E11730 TOP FL400 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 24/Feb/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     20.2 C
Minimum Air Temperature                     15.0 C
Grass Minimum Temperature                   16.2 C
Relative Humidity                        77 - 97 Percent
Rainfall                                      Trace 
Total rainfall since 1st January            25.6 mm
Against an average of                       69.4 mm

Other Stations                Min                  Max
King's Park                  13.9 C               19.9 C
Wong Chuk Hang               15.0 C               20.5 C
Ta Kwu Ling                  11.6 C               19.6 C
Lau Fau Shan                 11.8 C               19.7 C
Tai Po                       12.3 C               19.6 C
Sha Tin                      12.7 C               19.9 C
Tuen Mun                     12.6 C               20.4 C
Tseung Kwan O                13.2 C               20.1 C
Sai Kung                     12.8 C               20.3 C
Cheung Chau                  13.0 C               19.4 C
Chek Lap Kok                 12.5 C               22.5 C
Tsing Yi                     14.0 C               20.5 C
Shek Kong                    11.9 C               20.4 C
Tsuen Wan Ho Koon            11.1 C               19.5 C
Tsuen Wan Shing Mun Valley   13.2 C               20.3 C
Hong Kong Park               15.0 C               20.0 C
Shau Kei Wan                 13.4 C               19.5 C
Kowloon City                 13.3 C               19.7 C
Happy Valley                 15.4 C               20.6 C
Wong Tai Sin                 13.1 C               20.1 C
Stanley                      14.3 C               20.5 C
Kwun Tong                    13.9 C               20.2 C
Sham Shui Po                 13.6 C               20.5 C
Kai Tak Runway Park          14.7 C               20.0 C
Yuen Long Park               12.2 C               20.5 C
Tai Mei Tuk               12.5 C               19.3 C

Duration of sunshine (King's Park):              0 H
The mean UV index recorded at King's Park yesterday was 0.7,
the UV intensity was Low.
The maximum UV index for yesterday was 2.
 

Yesterday's (23 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                        0.14

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 23 Feb
     2003copy right image | Important notices | Privacy policy Last revision date: <24 Feb 2017> 

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