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Bulletin issued at 00:02 HKT 01/Feb/2019

At midnight at the Hong Kong Observatory the air temperature was 22 degrees Celsius and the relative humidity 76 per cent.

The air temperatures at other places were:

King's Park 21 degrees;
Wong Chuk Hang 22 degrees;
Ta Kwu Ling 21 degrees;
Lau Fau Shan 21 degrees;
Tai Po 21 degrees;
Sha Tin 22 degrees;
Tuen Mun 22 degrees;
Tseung Kwan O 20 degrees;
Sai Kung 21 degrees;
Cheung Chau 21 degrees;
Chek Lap Kok 21 degrees;
Tsing Yi 22 degrees;
Shek Kong 21 degrees;
Tsuen Wan Ho Koon 20 degrees;
Tsuen Wan Shing Mun Valley 19 degrees;
Hong Kong Park 21 degrees;
Shau Kei Wan 21 degrees;
Kowloon City 21 degrees;
Happy Valley 20 degrees;
Wong Tai Sin 22 degrees;
Stanley 21 degrees;
Kwun Tong 21 degrees;
Sham Shui Po 21 degrees;
Kai Tak Runway Park 22 degrees;
Yuen Long Park 21 degrees;
Tai Mei Tuk 20 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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Bulletin updated at 00:00 HKT 01/Feb/2019

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

A cold front formed over central China yesterday morning and moved southwards gradually. It crossed the coastal areas of Guangdong last night. Locally, it was warm with sunny periods and light winds. There was haze in some areas in the afternoon. The northeast monsoon associated with the cold front is expected to bring cooler weather to southern China today and tomorrow.

Weather forecast for Hong Kong (Friday, 1 Feb 2019)

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
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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 23:30 HKT 31/Jan/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 31 January 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:
    A cold front is crossing the the south China coastal waters. The associated northeast monsoon will affect the region.

    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 later.
    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 14 Kilometres

    Shantou Wind calm
      Visibility 14 Kilometres

    Dongsha Wind northeast force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind north-northwest force 4

    Macau Wind northwest force 2
      Visibility 12 Kilometres

    Xisha Wind 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 17:30 HKT 31/JAN/2019
    (Next update at 01:30 HKT 01/FEB/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A COLD FRONT OVER THE NORTHERN PART OF GUANGDONG
     IS MOVING SOUTHWARDS GRADUALLY.  THE ASSOCIATED
     NORTHEAST MONSOON WILL REACH THE COASTAL AREAS
     TONIGHT.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  VRB/5 BEC 010/10
       OFFSHORE:  VRB/5-10 BEC 010/15, OCNL 20         24-16
   B.   2000 FT:  350/10 BEC 050/15-20                 18-14
   C.   5000 FT:  050/15 BEC 130/15                    12
   D.  10000 FT:  260/25                               9
   E.  18000 FT:  260/30                               MS4
   F.  24000 FT:  250/45                               MS17
   G.  30000 FT:  250/50                               MS29
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      FINE, BECOMING CLOUDY.  LOCALIZED HAZE/MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT  SCT 4000 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 4000 M IN HAZE/MIST.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 6400, 9600, 10600 FT
   M. TURBULENCE    : MOD OFFSHORE AND NEAR HILLS LATER.
   N. SEA STATE     : 1.0-2.0 M     SEA TEMPERATURE    : 20 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE NORTH TO NORTHEASTERLY WINDS,
     OCCASIONALLY FRESH OFFSHORE.  BRIGHT PERIODS.=

    ===================================================================
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 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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