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Bulletin issued at 04:02 HKT 01/Feb/2019

At 4 a.m. at the Hong Kong Observatory the air temperature was 20 degrees Celsius and the relative humidity 72 per cent.

The air temperatures at other places were:

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


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


Climatological Information for 1 Feb

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 03:45 HKT 01/Feb/2019

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

The northeast monsoon is affecting Guangdong.

Weather forecast for today

Mainly cloudy. Cool in the morning. Bright periods during the day. Temperatures will range between 17 and 22 degrees. Moderate northerly winds, becoming fresh easterlies later and there will be one or two light rain patches.

Outlook : Cooler on Saturday. Humid and foggy with sunny periods early next week. Mild during the Lunar New Year holidays.


(The above forecast period is valid up to 23:59 HKT today, 01/02/2019; 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 31/Jan/2019

GALE WARNING AREAS: TAIWAN STRAIT, BASHI, PRATAS AND BALINTANG.

GENERAL SITUATION AT 310900 UTC:
COLD FRONT 23N 111E 24N 115E 26N 120E 25N 125E S 10KT.

MARINE FORECAST FOR 24 HOURS FROM 311300 UTC:

HONG KONG= N TO NE 4-5, E 5-6 LATER. CLD. LGT RAIN PATCHES LATER. SEA UP TO 2 M, 3 M LATER. SWELL NE 2 M. TEMP 23-16 C. =
KWANGTUNG= NE 6-7, E 6-7 LATER. CLD. RAIN PATCHES LATER. SEA 3-4 M. SWELL NE 2 M. =
TAIWAN STRAIT= NE 7-8. RAIN PATCHES. SEA 4-6 M. SWELL NE 2-3 M. =
BASHI= E TO NE 5-6, BEC 7-8. RAIN PATCHES. SEA 2-3 M, BEC 4-6 M. SWELL NE 2-3 M. =
PRATAS= NE 5-6, BEC E 7-8. RAIN PATCHES. SEA 2-3 M, BEC 4-6 M. SWELL NE 2 M. =
BALINTANG= E TO NE 5-6, BEC 7-8. RAIN PATCHES. SEA 2-3 M, BEC 4-6 M. SWELL NE 2-3 M. =
SCARBOROUGH= NE 5-6, 7 LATER. FINE. SEA 2-3 M, 4 M LATER. SWELL NE 2 M. =
PARACEL= NE 5-6, E 6-7 LATER. RAIN PATCHES. SEA 2-3 M, 3-4 M LATER. SWELL NE 2 M. =
TONKIN= NE 5-6, E 5-6 LATER. LGT RAIN PATCHES. SEA 2-3 M. =
DANANG= NE 5-6, E 5-6 LATER. LGT RAIN PATCHES. SEA 2-3 M. SWELL 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
  • 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 01/Feb/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 01 February 2019

    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 northeast monsoon is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

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

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

    Shanwei and South of Hong Kong:
    East to northeast force 6 to 7.
    Rough seas.

    Shangchuan Dao:
    Northeast force 5 to 6, becoming east force 6 to 7.
    Moderate to rough seas.

    Outlook for the next 48 hours
    Easterly winds of force 6 to 7, becoming east to southeasterly winds of force 4 to 5 later. Fog patches later.

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

    Waglan Island Wind north force 3
      Visibility 15 Kilometres

    Shantou Wind east-northeast force 2
      Visibility 18 Kilometres

    Dongsha Wind northeast force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind north-northeast force 3

    Macau Wind north force 3
      Visibility 19 Kilometres

    Xisha Wind east-northeast force 2
      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 01/FEB/2019
    (Next update at 9:00-9:30 HKT 01/FEB/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON IS AFFECTING THE COASTAL AREAS OF
     GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  020/10-15
       OFFSHORE:  020/15-20, OCNL 25                   15-20
   B.   2000 FT:  060/15-20, OCNL 25                   13-16
   C.   5000 FT:  120/10-15                            12
   D.  10000 FT:  260/20                               10
   E.  18000 FT:  240/30                               MS3
   F.  24000 FT:  260/40                               MS17
   G.  30000 FT:  240/50                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY. BRIGHT PERIODS DURING THE DAY.
      LOCALIZED HAZE.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT  SCT 4000 FT.
   K. VISIBILITY    : 8 KM. TEMPO 4000 M IN HAZE.
   L. 0 DEG. C LEVEL: 16500 FT      
      10 DEG. C LEVEL(S) : 8600, 10200 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.0-2.0 M     SEA TEMPERATURE    : 20 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EAST TO NORTHEASTERLY WINDS, OCCASIONALLY
     STRONG OFFSHORE. MAINLY CLOUDY. A FEW RAIN PATCHES LATER.=

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

    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 01/Feb/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     24.5 C
Minimum Air Temperature                     18.9 C
Grass Minimum Temperature                   15.8 C
Relative Humidity                        66 - 86 Percent
Rainfall                                       0 mm 
Total rainfall since 1st January             4.7 mm
Against an average of                       24.7 mm

Other Stations                Min                  Max
King's Park                  18.1 C               25.2 C
Wong Chuk Hang               16.8 C               25.4 C
Ta Kwu Ling                  15.4 C               27.2 C
Lau Fau Shan                 16.6 C               24.7 C
Tai Po                       17.1 C               25.8 C
Sha Tin                      16.7 C               26.7 C
Tuen Mun                     18.1 C               26.4 C
Tseung Kwan O                16.6 C               26.9 C
Sai Kung                     17.6 C               24.3 C
Cheung Chau                  17.5 C               27.7 C
Chek Lap Kok                 18.4 C               25.0 C
Tsing Yi                     17.6 C               25.7 C
Shek Kong                    15.2 C               27.3 C
Tsuen Wan Ho Koon            16.9 C               24.5 C
Tsuen Wan Shing Mun Valley   17.0 C               26.0 C
Hong Kong Park               18.1 C               25.6 C
Shau Kei Wan                 18.4 C               26.0 C
Kowloon City                 18.2 C               27.4 C
Happy Valley                 16.7 C               27.6 C
Wong Tai Sin                 17.7 C               26.8 C
Stanley                      18.3 C               24.9 C
Kwun Tong                    18.1 C               27.1 C
Sham Shui Po                 18.4 C               26.7 C
Kai Tak Runway Park          18.0 C               26.1 C
Yuen Long Park               15.4 C               27.4 C
Tai Mei Tuk               17.1 C               28.2 C

Duration of sunshine (King's Park):              7.7 H
The mean UV index recorded at King's Park yesterday was 2,
the UV intensity was Low.
The maximum UV index for yesterday was 5.
 

Yesterday's (31 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                           0.13
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 31 Jan
     2003copy right image | Important notices | Privacy policy Last revision date: <01 Feb 2019> 

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