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Bulletin issued at 06:02 HKT 20/Mar/2018

At 6 a.m. at the Hong Kong Observatory the air temperature was 21 degrees Celsius and the relative humidity 80 per cent.

The air temperatures at other places were:

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


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


Climatological Information for 20 Mar

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Automatic Regional Weather Forecast in Hong Kong & Pearl River Delta Region

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Bulletin updated at 06:15 HKT 20/Mar/2018

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

The northeast monsoon associated with a cold front is affecting the coast of Guangdong gradually.

Weather forecast for today

Mainly cloudy. There will be one or two showers and rather low visibility at first. Sunny intervals in the afternoon with a maximum temperature of around 23 degrees. It will become cool appreciably at night. Temperatures will fall to about 16 degrees. Moderate to fresh northerly winds, occasionally strong offshore.

Outlook : Fine and dry with cool mornings in the next couple of days. Temperature difference between day and night will be relatively large.


(The above forecast period is valid up to 23:59 HKT today, 20/03/2018; 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 21:00 HKT 19/Mar/2018

N0 WARNING.

GENERAL SITUATION AT 190900 UTC:
COLD FRONT 23N 106E 23N 111E 27N 120E S 10KT.

MARINE FORECAST FOR 24 HOURS FROM 191300 UTC:

HONG KONG= S 4, BEC N UP TO 7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. DOWN TO 500 M IN FOG PATCHES AT FIRST. SEA UP TO 4 M. TEMP 16-23 C. =
KWANGTUNG= S 4-5, BEC N 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. DOWN TO 500 M IN FOG PATCHES AT FIRST. SEA 2 M, BEC 3-4 M. =
TAIWAN STRAIT= N 6-7, S 4-5 IN S AT FIRST. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. DOWN TO 500 M IN FOG PATCHES AT FIRST. SEA 2-4 M. SWELL N 2 M. =
BASHI= S 4-5, BEC NW 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M, BEC 3 M. SWELL N UP TO 2 M. =
PRATAS= S 4-5, BEC N 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M, BEC 3-4 M. =
BALINTANG= S 4-5, BEC NW UP TO 6. ISOL SHOWERS AND TS LATER. SEA 2 M, BEC 3 M. SWELL N UP TO 2 M. =
SCARBOROUGH= S 4-5, N UP TO 6 LATER. ISOL SHOWERS. SEA 2 M, UP TO 3 M LATER. =
PARACEL= S 4-5, BEC N 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. DOWN TO 500 M IN FOG PATCHES IN N AT FIRST. SEA 2 M, BEC 3-4 M. =
TONKIN= N 6-7, S 4-5 IN S AT FIRST. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. DOWN TO 500 M IN FOG PATCHES AT FIRST. SEA 2-4 M. =
DANANG= S 4-5, BEC N 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. DOWN TO 500 M IN FOG PATCHES AT FIRST. SEA 2 M, BEC 3-4 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 20/Mar/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 5:30 a.m. on 20 March 2018

    Warnings:
    Strong winds in all areas. Fog in all areas.

    Weather Situation:
    A cold front is moving across the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North force 5 to 6, occasionally force 7.
    One or two showers. Fog patches at first.
    Moderate to rough seas.

    Nan'ao, Shanwei and South of Hong Kong:
    North force 6 to 7.
    Isolated showers and thunderstorms. Fog patches at first.
    Rough seas.

    Shangchuan Dao:
    North force 6 to 7.
    Isolated squally showers and thunderstorms. Fog patches at first.
    Rough seas.

    Outlook for the next 48 hours
    Northerly winds of force 6 to 7, becoming easterly winds of force 6 later.

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

    Waglan Island Wind west force 3
      Visibility 450 Metres

    Shantou Wind southwest force 1
      Visibility 2600 Metres in mist

    Dongsha Wind southwest force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind northwest force 2

    Macau Wind southwest force 1
      Visibility 1900 Metres in mist

    Xisha Wind southeast force 1
      Visibility 19 Kilometres

  • Explanation of Seas or Sea Waves
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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 20/MAR/2018
    (Next update at 9:00-9:30 HKT 20/MAR/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS. 
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A COLD FRONT OVER INLAND GUANGDONG IS MOVING SOUTHWARDS 
     GRADUALLY.  IT IS EXPECTED TO MOVE ACROSS THE COASTAL AREAS
     IN THE MORNING. BESIDES, THUNDERY SHOWERS ARE AFFECTING THE
     COAST OF GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  360/10-15
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  VRB/5
                  BEC 360/15-20, OCNL 25               18-23
   B.   2000 FT:  220/5-10
                  BEC 360/15-20, OCNL 25               17
   C.   5000 FT:  260/25                               15
   D.  10000 FT:  260/35                               7
   E.  18000 FT:  240/45                               MS9
   F.  24000 FT:  240/55                               MS19
   G.  30000 FT:  260/80                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH SHOWERS. ISOLATED SQUALLY THUNDERSTORMS
      AT FIRST. LOCALIZED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT  SCT 2500 FT  BKN 10000 FT.  
      TEMPO FEW 600 FT  SCT CB 1500 FT  BKN 4000 FT.
   K. VISIBILITY    : 7 KM. TEMPO 3000 M IN SHOWERS/MIST. 
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 13500 FT      10 DEG. C LEVEL(S) : 8800 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS, OFFSHORE AND NEAR
                      HILLS.
   N. SEA STATE     : 1.5-2.5 M     SEA TEMPERATURE    : 20 DEG
IV.  FURTHER OUTLOOK: 
     FRESH NORTHERLY WINDS, STRONG OFFSHORE. MAINLY CLOUDY WITH
     ISOLATED SHOWERS. SUNNY INTERVALS IN THE AFTERNOON.=

    ===================================================================
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 04:40 HKT on 20 Mar 18

    VHHK SIGMET 9 VALID 191745/192145 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1930 E11130 - N2030 E11130 - N2100 E11400 - N2000 E11400 - N1930 E11130 TOP FL400 MOV ENE 15KT= VHHK SIGMET 10 VALID 192035/200035 VHHH- VHHK HONG KONG FIR EMBD TS FCST N OF N21 AND E OF E117 TOP FL400 MOV ENE 18KT WKN= VHHK SIGMET 12 VALID 192040/200040 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1900 E11200 - N1930 E11130 - N2030 E11130 - N2100 E11500 - N2000 E11500 - N1900 E11200 TOP FL400 MOV ENE 20KT 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 20/Mar/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     25.6 C
Minimum Air Temperature                     20.7 C
Grass Minimum Temperature                   20.5 C
Relative Humidity                        75 - 93 Percent
Rainfall                                      Trace 
Total rainfall since 1st January            89.4 mm
Against an average of                      118.1 mm

Other Stations                Min                  Max
King's Park                  20.2 C               25.0 C
Wong Chuk Hang               20.9 C               25.5 C
Ta Kwu Ling                  20.1 C               25.5 C
Lau Fau Shan                 19.8 C               27.1 C
Tai Po                       19.7 C               24.4 C
Sha Tin                      20.2 C               26.0 C
Tuen Mun                     20.9 C               26.2 C
Tseung Kwan O                19.8 C               25.0 C
Sai Kung                     19.9 C               24.1 C
Cheung Chau                  19.8 C               25.4 C
Chek Lap Kok                 21.3 C               27.3 C
Tsing Yi                     21.2 C               26.6 C
Shek Kong                    20.5 C               28.0 C
Tsuen Wan Ho Koon            19.6 C               25.6 C
Tsuen Wan Shing Mun Valley   20.5 C               26.0 C
Hong Kong Park               20.3 C               25.5 C
Shau Kei Wan                 19.3 C               24.6 C
Kowloon City                 20.2 C               25.8 C
Happy Valley                 20.7 C               26.0 C
Wong Tai Sin                 20.4 C               25.8 C
Stanley                      20.0 C               24.7 C
Kwun Tong                    19.9 C               25.4 C
Sham Shui Po                 20.7 C               26.5 C
Kai Tak Runway Park          20.0 C               24.9 C
Yuen Long Park               20.7 C               28.2 C
Tai Mei Tuk               19.7 C               25.7 C

Duration of sunshine (King's Park):              2.5 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 6.
Sea surface temperature (Waglan Island):        19.8 C 

Yesterday's (19 Mar 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                               0.10
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 19 Mar
     2003copy right image | Important notices | Privacy policy Last revision date: <20 Mar 2018> 

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