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Bulletin issued at 06:02 HKT 24/Apr/2018

At 6 a.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 88 per cent.

The air temperatures at other places were:

King's Park 25 degrees;
Wong Chuk Hang 24 degrees;
Ta Kwu Ling 23 degrees;
Lau Fau Shan 24 degrees;
Tai Po 24 degrees;
Sha Tin 23 degrees;
Tuen Mun 25 degrees;
Tseung Kwan O 23 degrees;
Sai Kung 23 degrees;
Cheung Chau 24 degrees;
Chek Lap Kok 25 degrees;
Tsing Yi 24 degrees;
Shek Kong 24 degrees;
Tsuen Wan Ho Koon 23 degrees;
Tsuen Wan Shing Mun Valley 24 degrees;
Hong Kong Park 25 degrees;
Shau Kei Wan 24 degrees;
Kowloon City 25 degrees;
Happy Valley 25 degrees;
Wong Tai Sin 24 degrees;
Stanley 24 degrees;
Kwun Tong 25 degrees;
Sham Shui Po 25 degrees;
Kai Tak Runway Park 24 degrees;
Yuen Long Park 24 degrees;
Tai Mei Tuk 24 degrees.


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


Climatological Information for 24 Apr

Regional Weather in Hong Kong

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Hong Kong Climatology


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Bulletin updated at 05:45 HKT 24/Apr/2018

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

A trough of low pressure over inland Guangdong is moving southwards, and edging closer to the coastal areas gradually. The associated showers will affect the region.

Weather forecast for today

Cloudy with showers. A few thunderstorms in the morning. The maximum temperature will be about 26 degrees. Light winds, becoming moderate northerlies.

Outlook : Mainly cloudy in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 24/04/2018; 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 21:00 HKT 23/Apr/2018

N0 WARNING.

GENERAL SITUATION AT 230900 UTC:
TROUGH 24N 102E 23N 111E 30N 122E SE 5KT.

MARINE FORECAST FOR 24 HOURS FROM 231300 UTC:

HONG KONG= S 4, BEC N 5. DOWN TO 500 M IN FOG PATCHES. ISOL SHOWERS AND TS. SEA UP TO 2 M. TEMP 23-26 C. =
KWANGTUNG= S 4-5, BEC N TO NE 5-6. DOWN TO 1000 M IN MIST PATCHES. ISOL SHOWERS AND TS. SEA 2 M, BEC 3 M. =
TAIWAN STRAIT= S 4-5, BEC N TO NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M, BEC 3-4 M. SWELL N 2 M LATER. =
BASHI= S 5, N TO NE 6-7 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M, 3-4 M LATER. =
PRATAS= S 4-5, N TO NE 5 LATER. ISOL SHOWERS. SEA UP TO 2 M. =
BALINTANG= S 5, N TO NE 5-6 LATER. ISOL SHOWERS AND TS. SEA 2 M, 3 M LATER. =
SCARBOROUGH= S 4-5, N TO NE 4-5 LATER. FINE. SEA UP TO 2 M. =
PARACEL= S 4-5, N TO NE 5 LATER. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
TONKIN= S 5-6, BEC N TO NE 5-6. DOWN TO 1000 M IN MIST PATCHES. ISOL SHOWERS AND TS. SEA 2-3 M. =
DANANG= S 5, N TO NE 5 LATER. ISOL SHOWERS AND TS. SEA 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 05:30 HKT 24/Apr/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 24 April 2018

    Warnings:
    Strong winds in Nan'ao, Shanwei, south of Hong Kong and Shangchuan Dao.

    Weather Situation:
    A southerly airstream is affecting the south China coastal waters. Besides, a trough of low pressure over inland Guangdong is moving southwards, and will cross the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South force 4, becoming north force 5.
    Isolated showers and thunderstorms. Mist patches.
    Moderate seas.

    Nan'ao:
    South force 4 to 5, becoming north to northeast up to force 7.
    Isolated showers and thunderstorms.
    Moderate seas, becoming rough.

    Shanwei, South of Hong Kong and Shangchuan Dao:
    South force 4 to 5, becoming north to northeast force 5 to 6.
    Isolated showers and thunderstorms.
    Moderate seas, becoming rough.

    Outlook for the next 48 hours
    North to northeasterly winds of force 5 to 6. Isolated showers and thunderstorms.

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

    Waglan Island Wind northeast force 2
      Visibility 18 Kilometres

    Shantou Wind west-southwest force 2
      Visibility 23 Kilometres

    Huangmaozhou Wind south-southwest force 2

    Macau Wind southwest force 1
      Visibility 15 Kilometres

    Xisha Wind southeast force 1
      Visibility 18 Kilometres

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
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  • Visibility Readings in Hong Kong Waters
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 24/APR/2018
    (Next update at 9:00-9:30 HKT 24/APR/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A SOUTHERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.  BESIDES, THE TROUGH OF LOW
     PRESSURE NOW OVER INLAND GUANGDONG WILL MOVE
     SOUTHWARDS AND CROSS THE COASTAL AREAS TODAY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  180/5-10
                  BEC 360/10
                  TEMPO VRB/15G25 IN TS                26-22
   B.   2000 FT:  250/10, OCNL 15                      21
   C.   5000 FT:  260/10                               17
   D.  10000 FT:  260/15                               10
   E.  18000 FT:  300/20                               MS4
   F.  24000 FT:  310/30                               MS14
   G.  30000 FT:  320/45                               MS27
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      CLOUDY WITH ISOLATED SHOWERS AND THUNDERSTORMS.
      LOCALIZED MIST AT FIRST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 3500 FT.  TEMPO FEW CB 800 FT
      SCT 1500 FT  BKN 4000 FT.
   K. VISIBILITY    : 8 KM.  TEMPO 4000 M IN SHOWERS/MIST.  TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 24 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE NORTHERLY WINDS.  CLOUDY WITH ISOLATED
     SHOWERS AND THUNDERSTORMS.=

    ===================================================================
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 13:35 HKT on 15 Apr 18

    VHHK SIGMET 3 VALID 150345/150745 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2000 E11130 - N2124 E11130 - N2230 E11342 - N2336 E11712 - N2242 E11712 - N2000 E11130 - N2000 E11130 TOP FL400 MOV NE 15KT NC= VHHK SIGMET 5 VALID 150535/150935 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2248 E11442 - N2342 E11730 - N2248 E11730 - N2154 E11442 - N2248 E11442 TOP FL400 MOV NE 15KT 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/Apr/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     30.2 C
Minimum Air Temperature                     24.3 C
Grass Minimum Temperature                   22.9 C
Relative Humidity                        64 - 91 Percent
Rainfall                                      Trace 
Total rainfall since 1st January           108.9 mm
Against an average of                      297.0 mm

Other Stations                Min                  Max
King's Park                  23.6 C               30.1 C
Wong Chuk Hang               23.7 C               28.2 C
Ta Kwu Ling                  22.6 C               30.7 C
Lau Fau Shan                 22.7 C               29.6 C
Tai Po                       23.3 C               29.8 C
Sha Tin                      23.6 C               30.7 C
Tuen Mun                     23.8 C               30.2 C
Tseung Kwan O                22.7 C               29.4 C
Sai Kung                     23.6 C               27.3 C
Cheung Chau                  23.0 C               29.5 C
Chek Lap Kok                 24.7 C               30.4 C
Tsing Yi                     23.7 C               29.6 C
Shek Kong                    23.5 C               31.4 C
Tsuen Wan Ho Koon            22.8 C               28.3 C
Tsuen Wan Shing Mun Valley   23.1 C               29.3 C
Hong Kong Park               24.0 C               29.0 C
Shau Kei Wan                 23.1 C               29.3 C
Kowloon City                 23.6 C               30.8 C
Happy Valley                 24.1 C               30.0 C
Wong Tai Sin                 23.6 C               29.4 C
Stanley                      23.3 C               28.1 C
Kwun Tong                    23.5 C               30.4 C
Sham Shui Po                 24.2 C               28.8 C
Kai Tak Runway Park          24.0 C               29.3 C
Yuen Long Park               23.2 C               30.8 C
Tai Mei Tuk               23.3 C               32.0 C

Duration of sunshine (King's Park):              7.1 H
The mean UV index recorded at King's Park yesterday was 4,
the UV intensity was Moderate.
The maximum UV index for yesterday was 8.
Sea surface temperature (Waglan Island):        23.8 C 

Yesterday's (23 Apr 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                             0.08
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 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 23 Apr
     2003copy right image | Important notices | Privacy policy Last revision date: <24 Apr 2018> 

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