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Bulletin issued at 09:02 HKT 01/Mar/2018

At 9 a.m. at the Hong Kong Observatory the air temperature was 20 degrees Celsius and the relative humidity 91 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.7. The intensity of UV radiation was low.

The air temperatures at other places were:

King's Park 19 degrees;
Wong Chuk Hang 21 degrees;
Ta Kwu Ling 19 degrees;
Lau Fau Shan 19 degrees;
Tai Po 18 degrees;
Sha Tin 19 degrees;
Tuen Mun 21 degrees;
Tseung Kwan O 18 degrees;
Sai Kung 18 degrees;
Cheung Chau 18 degrees;
Chek Lap Kok 22 degrees;
Tsing Yi 20 degrees;
Shek Kong 21 degrees;
Tsuen Wan Ho Koon 19 degrees;
Tsuen Wan Shing Mun Valley 22 degrees;
Hong Kong Park 19 degrees;
Shau Kei Wan 18 degrees;
Kowloon City 21 degrees;
Happy Valley 21 degrees;
Wong Tai Sin 21 degrees;
Stanley 18 degrees;
Kwun Tong 20 degrees;
Sham Shui Po 21 degrees;
Kai Tak Runway Park 18 degrees;
Yuen Long Park 22 degrees;
Tai Mei Tuk 19 degrees.

Between midnight and 9 a.m. the minimum temperature was 19.4 degrees Celsius at the Hong Kong Observatory.


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


Climatological Information for 1 Mar

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 08:45 HKT 01/Mar/2018

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

A humid maritime airstream is affecting the coast of Guangdong. Locally, there was fog this morning and the visibility at Waglan Island once fell below 100 metres.

Weather forecast for today

Fine. Fog in the morning. It will be warm during the day with a maximum temperature of around 26 degrees. Light to moderate easterly winds.

Outlook : Moist with fog in the next few days. Warm during the day.


(The above forecast period is valid up to 23:59 HKT today, 01/03/2018; 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 01/Mar/2018

N0 WARNING.

GENERAL SITUATION AT 282100 UTC:
AN EASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 010100 UTC:

HONG KONG= E 3-4. DOWN TO 100 M IN FOG. TEMP 26-20 C. =
KWANGTUNG= E 4-5. DOWN TO 100 M IN FOG PATCHES. SEA UP TO 2 M. =
TAIWAN STRAIT= NE 4-5. FINE. SEA UP TO 2 M. =
BASHI= E TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E TO NE 2 M. =
PRATAS= E 4-5. RAIN PATCHES. SEA UP TO 2 M. SWELL E TO NE UP TO 2 M. =
BALINTANG= E TO SE 4-5. ISOL SHOWERS. SEA UP TO 2 M. SWELL E TO NE 2 M. =
SCARBOROUGH= E TO NE 4, OCNL 5. FINE. SEA UP TO 2 M. =
PARACEL= SE 4, OCNL 5. FINE. SEA UP TO 2 M. =
TONKIN= SE 4, OCNL 5. DOWN TO 500 M IN FOG PATCHES. SEA UP TO 2 M. =
DANANG= SE 4, OCNL 5. DOWN TO 500 M IN FOG 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

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    Bulletin issued at 09:30 HKT 01/Mar/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 01 March 2018

    Warnings:
    Fog in all areas.

    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 3 to 4.
    Foggy.
    Slight to moderate seas.

    Nan'ao and Shanwei:
    East to northeast force 4 to 5.
    Fog patches.
    Moderate seas.

    South of Hong Kong and Shangchuan Dao:
    East to southeast force 4.
    Fog patches.
    Moderate seas.

    Outlook for the next 48 hours
    Southeasterly winds of force 4 to 5. Fog patches.

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

    Waglan Island Wind north force 2
      Visibility 70 Metres

    Shantou Wind east force 1
      Visibility 19 Kilometres

    Dongsha Wind east-northeast force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind east-southeast force 1

    Macau Wind south force 2
      Visibility 100 Metres in fog

    Xisha Wind east force 1
      Visibility 15 Kilometres

  • Explanation of Seas or Sea Waves
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 09:00 HKT 01/MAR/2018
    (Next update at 12:30 HKT 01/MAR/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     FOG.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  080/5-10
       OFFSHORE:  080/10                               20-26
   B.   2000 FT:  150/10                               18
   C.   5000 FT:  100/10                               14
   D.  10000 FT:  240/25                               8
   E.  18000 FT:  240/15                               MS5
   F.  24000 FT:  270/50                               MS15
   G.  30000 FT:  260/75                               MS30
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      400-1400 FT
   I. WEATHER       : 
      FINE. LOCALISED MIST/HAZE.  FOG PATCHES IN THE
      MORNING.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3500 FT.
   K. VISIBILITY    : 5 KM. TEMPO 1500 M IN MIST/HAZE. TEMPO 200 M IN FOG.
   L. 0 DEG. C LEVEL: 14000 FT      10 DEG. C LEVEL(S) : 8400, 9000 FT
   M. TURBULENCE    : NIL
   N. SEA STATE     : 0.5-1.0 M     SEA TEMPERATURE    : 17 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE EASTERLY WINDS. MAINLY CLOUDY.
     LOCALIZED MIST/FOG.=

    ===================================================================
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 15:35 HKT on 22 Feb 18

    VHHK SIGMET 1 VALID 220735/221135 VHHH- VHHK HONG KONG FIR SEV ICE FCST N OF N2030 AND E OF E11300 FL130/210 MOV E 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 01/Mar/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     26.2 C
Minimum Air Temperature                     18.5 C
Grass Minimum Temperature                   17.4 C
Relative Humidity                        67 - 87 Percent
Rainfall                                      Trace 
Total rainfall since 1st January            66.7 mm
Against an average of                       78.9 mm

Other Stations                Min                  Max
King's Park                  17.8 C               25.8 C
Wong Chuk Hang               18.5 C               24.0 C
Ta Kwu Ling                  17.6 C               28.5 C
Lau Fau Shan                 17.3 C               25.4 C
Tai Po                       17.5 C               25.1 C
Sha Tin                      18.1 C               27.0 C
Tuen Mun                     18.5 C               27.0 C
Tseung Kwan O                17.3 C               25.4 C
Sai Kung                     17.7 C               23.3 C
Cheung Chau                  17.4 C               25.0 C
Chek Lap Kok                 18.7 C               26.6 C
Tsing Yi                     18.4 C               26.4 C
Shek Kong                    17.6 C               28.7 C
Tsuen Wan Ho Koon            18.1 C               25.5 C
Tsuen Wan Shing Mun Valley   18.5 C               27.4 C
Hong Kong Park               17.9 C               25.9 C
Shau Kei Wan                 17.6 C               24.0 C
Kowloon City                 17.7 C               28.1 C
Happy Valley                 18.1 C               27.7 C
Wong Tai Sin                 18.3 C               27.8 C
Stanley                      17.6 C               23.9 C
Kwun Tong                    18.2 C               27.7 C
Sham Shui Po                 18.7 C               25.5 C
Kai Tak Runway Park          17.9 C               24.1 C
Yuen Long Park               17.8 C               28.0 C
Tai Mei Tuk               17.7 C               26.9 C

Duration of sunshine (King's Park):              6.9 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 7.
Sea surface temperature (Waglan Island):        17.0 C 

Yesterday's (28 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 28 Feb
     2003copy right image | Important notices | Privacy policy Last revision date: <01 Mar 2018> 

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