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Bulletin issued at 07:02 HKT 31/Jan/2019

At 7 a.m. at the Hong Kong Observatory the air temperature was 19 degrees Celsius and the relative humidity 86 per cent.

The air temperatures at other places were:

King's Park 18 degrees;
Wong Chuk Hang 17 degrees;
Ta Kwu Ling 16 degrees;
Lau Fau Shan 17 degrees;
Tai Po 17 degrees;
Sha Tin 17 degrees;
Tuen Mun 18 degrees;
Tseung Kwan O 17 degrees;
Sai Kung 18 degrees;
Cheung Chau 18 degrees;
Chek Lap Kok 19 degrees;
Tsing Yi 18 degrees;
Shek Kong 15 degrees;
Tsuen Wan Ho Koon 17 degrees;
Tsuen Wan Shing Mun Valley 17 degrees;
Hong Kong Park 18 degrees;
Shau Kei Wan 19 degrees;
Kowloon City 19 degrees;
Happy Valley 17 degrees;
Wong Tai Sin 18 degrees;
Stanley 19 degrees;
Kwun Tong 18 degrees;
Sham Shui Po 19 degrees;
Kai Tak Runway Park 18 degrees;
Yuen Long Park 15 degrees;
Tai Mei Tuk 17 degrees.


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


Climatological Information for 31 Jan

Regional Weather in Hong Kong

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Bulletin updated at 06:45 HKT 31/Jan/2019

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

A cold front has formed over central China and is moving southwards gradually. The associated northeast monsoon is expected to reach the south China coast tonight.

Weather forecast for today

Sunny periods. Visibility relatively low. One or two light rain patches in the morning. Warm during the day with a maximum temperature of about 24 degrees. Light to moderate northeasterly winds.

Outlook : Cooler on Friday and Saturday. Becoming humid with fog early next week.


(The above forecast period is valid up to 23:59 HKT today, 31/01/2019; 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 21:00 HKT 30/Jan/2019

N0 WARNING.

GENERAL SITUATION AT 300900 UTC:
AN EASTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 301300 UTC:

HONG KONG= NE 4-5. DOWN TO 1000 M IN MIST OR LGT RAIN PATCHES. SEA UP TO 2 M. SWELL E TO NE 2 M. TEMP 19-24 C. =
KWANGTUNG= E TO NE 4-5. DOWN TO 500 M IN FOG OR LGT RAIN PATCHES IN E. SEA UP TO 2 M. SWELL E TO NE 2 M. =
TAIWAN STRAIT= E TO NE 4-5, 6 LATER. DOWN TO 500 M IN FOG OR LGT RAIN PATCHES AT FIRST. SEA UP TO 2 M, 3 M LATER. SWELL NE 2 M. =
BASHI= E TO NE 5-6. RAIN PATCHES. SEA 2-3 M. SWELL E TO NE 2 M. =
PRATAS= E TO NE 5-6. RAIN PATCHES. SEA 2-3 M. SWELL E TO NE 2 M. =
BALINTANG= E 5-6. RAIN PATCHES. SEA 2-3 M. SWELL E TO NE 2 M. =
SCARBOROUGH= E TO NE 4-5. FINE. SEA UP TO 2 M. SWELL NE 2 M. =
PARACEL= E TO NE 4-5. FINE. SEA UP TO 2 M. SWELL E TO NE 2 M. =
TONKIN= E TO NE 4-5. DOWN TO 500 M IN FOG OR LGT RAIN PATCHES. SEA UP TO 2 M. =
DANANG= E TO NE 4-5. LGT RAIN PATCHES. SEA UP TO 2 M. SWELL E TO NE 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
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    • 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 05:30 HKT 31/Jan/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 31 January 2019

    Warnings:
    Fog in Nan'ao and Shanwei.

    Weather Situation:
    An easterly airstream is affecting the south China coastal waters. The northeast monsoon is expected to reach the region tonight.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Northeast force 4 to 5.
    A few light rain patches, visibility relatively low in some areas.
    Moderate seas.

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

    South of Hong Kong and Shangchuan Dao:
    East to northeast force 4 to 5.
    Moderate seas.

    Outlook for the next 48 hours
    Northerly winds of force 6 to 7, becoming easterly winds up to force 8. Fog patches at first.

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

    Waglan Island Wind north force 3
      Visibility 28 Kilometres

    Shantou Wind south force 1
      Visibility 6 Kilometres in mist

    Dongsha Wind east force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind northeast force 4

    Macau Wind north force 1
      Visibility 10 Kilometres

    Xisha Wind east-northeast force 1
      Visibility 30 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 01:30 HKT 31/JAN/2019
    (Next update at 9:00-9:30 HKT 31/JAN/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS. MEANWHILE, PRESSURE IS
     RISING OVER NORTHERN CHINA. THE NORTHEAST
     MONSOON IS EXPECTED TO REACH THE SOUTH CHINA
     COASTAL AREAS ON THURSDAY NIGHT.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  060/5-10
       OFFSHORE:  080/15                               17-24
   B.   2000 FT:  140/15-20                            15
   C.   5000 FT:  180/15                               11
   D.  10000 FT:  250/30                               11
   E.  18000 FT:  230/40                               MS3
   F.  24000 FT:  230/50                               MS17
   G.  30000 FT:  240/50                               MS30
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY. LOCALIZED HAZE/MIST
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 3000 FT SCT 4500 FT
   K. VISIBILITY    : 8 KM. 4000M IN MIST/HAZE
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 5900, 7800, 11400 FT
   M. TURBULENCE    : MOD OFFSHORE AND  NEAR HILLS
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 19 DEG
IV.  FURTHER OUTLOOK: 
     LIGHT TO MODERATE NORTHEASTERLY WINDS. MAINLY
     CLOUDY, SUNNY PERIONDS DURING THE DAY. LOCALISED
     MIST/HAZE.=

    ===================================================================
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.

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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.

    There is no Significant Weather Information (SIGMET)

    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 31/Jan/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     21.6 C
Minimum Air Temperature                     17.2 C
Grass Minimum Temperature                   14.1 C
Relative Humidity                        64 - 85 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January             4.7 mm
Against an average of                       24.4 mm

Other Stations                Min                  Max
King's Park                  16.1 C               22.2 C
Wong Chuk Hang               16.3 C               23.0 C
Ta Kwu Ling                  11.5 C               24.9 C
Lau Fau Shan                 13.8 C               23.1 C
Tai Po                       14.2 C               22.0 C
Sha Tin                      15.3 C               22.7 C
Tuen Mun                     14.5 C               23.5 C
Tseung Kwan O                15.1 C               22.0 C
Sai Kung                     15.3 C               21.0 C
Cheung Chau                  15.5 C               23.2 C
Chek Lap Kok                 17.0 C               23.7 C
Tsing Yi                     15.3 C               23.2 C
Shek Kong                    12.3 C               23.3 C
Tsuen Wan Ho Koon            14.0 C               23.2 C
Tsuen Wan Shing Mun Valley   14.1 C               24.5 C
Hong Kong Park               16.0 C               22.1 C
Shau Kei Wan                 16.4 C               20.8 C
Kowloon City                 15.9 C               23.7 C
Wong Tai Sin                 16.7 C               23.2 C
Stanley                      16.5 C               21.5 C
Kwun Tong                    16.3 C               22.9 C
Sham Shui Po                 16.1 C               24.4 C
Kai Tak Runway Park          16.8 C               21.1 C
Yuen Long Park               12.5 C               24.6 C
Tai Mei Tuk               15.6 C               25.2 C

Duration of sunshine (King's Park):              6.7 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 6.
 

Yesterday's (30 Jan 2019) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 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                           0.09
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 30 Jan
     2003copy right image | Important notices | Privacy policy Last revision date: <31 Jan 2019> 

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