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Bulletin issued at 00:02 HKT 20/Mar/2018

At midnight at the Hong Kong Observatory the air temperature was 23 degrees Celsius and the relative humidity 88 per cent.

The air temperatures at other places were:

King's Park 23 degrees;
Wong Chuk Hang 23 degrees;
Ta Kwu Ling 22 degrees;
Lau Fau Shan 22 degrees;
Tai Po 21 degrees;
Sha Tin 22 degrees;
Tuen Mun 22 degrees;
Tseung Kwan O 21 degrees;
Sai Kung 21 degrees;
Cheung Chau 21 degrees;
Chek Lap Kok 25 degrees;
Tsing Yi 22 degrees;
Shek Kong 23 degrees;
Tsuen Wan Ho Koon 22 degrees;
Tsuen Wan Shing Mun Valley 22 degrees;
Hong Kong Park 23 degrees;
Shau Kei Wan 21 degrees;
Kowloon City 22 degrees;
Happy Valley 23 degrees;
Wong Tai Sin 23 degrees;
Stanley 21 degrees;
Kwun Tong 23 degrees;
Sham Shui Po 22 degrees;
Kai Tak Runway Park 22 degrees;
Yuen Long Park 23 degrees;
Tai Mei Tuk 21 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

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

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Bulletin updated at 00:00 HKT 20/Mar/2018

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

A cold front formed over the northern part of southern China and moved southwards gradually yesterday morning. Besides, thundery showers affected the coast of Guangdong yesterday. Locally, there were sunny intervals and rather low visibility. Later, there were a few showers and thunderstorms. The cold front is expected to move across the south China coastal areas this morning. The associated northeast monsoon will bring generally fine and appreciably cooler weather to the region in the middle and latter parts of this week.

Weather forecast for Hong Kong (Tuesday, 20 Mar 2018)

Cloudy with showers. There will be squally thunderstorms and rather low visibility at first. Showers will ease off during the day and there will be sunny intervals in the afternoon. It will become cool appreciably with temperatures ranging between 16 and 23 degrees. Light winds, becoming fresh northerlies, occasionally strong offshore.

Outlook : Fine and dry with cool mornings in the following 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 23:30 HKT 19/Mar/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 19 March 2018

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

    Weather Situation:
    A cold front over inland Guangdong is moving southwards gradually. It is expected to move across the coastal waters this morning.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North force 5 to 6, occasionally force 7.
    Isolated squally showers and thunderstorms. Fog patches at first.
    Moderate to rough seas.

    Nan'ao and Shanwei:
    South force 4 to 5, becoming north force 6 to 7.
    Isolated squally showers and thunderstorms. Fog patches at first.
    Moderate seas, becoming rough.

    South of Hong Kong and 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 calm
      Visibility 1100 Metres

    Shantou Wind southeast force 1
      Visibility 9 Kilometres

    Dongsha Wind north-northwest force 1
      Visibility 10 Kilometres

    Huangmaozhou Wind south-southeast force 2

    Macau Wind west force 1
      Visibility 1500 Metres in mist

    Xisha Wind south force 1
      Visibility 22 Kilometres

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
  • Descriptive Terms of Wind Speeds
  • Visibility Readings in Hong Kong Waters
  • Map showing forecast areas
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 19/MAR/2018
    (Next update at 01:30 HKT 20/MAR/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
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 TOMORROW MORNING.
     BESIDES, THUNDERY SHOWERS ARE AFFECTING THE
     COAST OF GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  VRB/5 BEC 360/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  150/10 BEC 360/15-20                 24-19
   B.   2000 FT:  190/15 BEC 290/15                    18-16
   C.   5000 FT:  250/25                               14
   D.  10000 FT:  260/30                               6
   E.  18000 FT:  260/50                               MS9
   F.  24000 FT:  260/55                               MS19
   G.  30000 FT:  260/65                               MS31
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      4100 - 4700 FT.
   I. WEATHER       : 
      CLOUDY WITH SHOWERS AND ISOLATED SQUALLY
      THUNDERSTORMS.  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: 14000 FT      10 DEG. C LEVEL(S) : 9000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS.
                      MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.0 BEC 2.0 M   SEA TEMPERATURE    : 20 DEG
IV.  FURTHER OUTLOOK: 
     FRESH TO STRONG NORTHERLY WINDS.  CLOUDY WITH
     SHOWERS AND SQUALLY THUNDERSTORMS AT FIRST.
     SHOWERS EASING OFF DURING THE DAY AND 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 23:30 HKT on 19 Mar 18

    VHHK SIGMET 4 VALID 191330/191730 VHHH- VHHK HONG KONG FIR EMBD TS OBS WI N2000 E11130 - N2130 E11130 - N2200 E11236 - N2200 E11530 - N2130 E11500 - N2000 E11130 TOP FL400 MOV NE 15KT= VHHK SIGMET 5 VALID 191530/191930 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2312 E11554 - N2324 E11630 - N2100 E11600 - N2000 E11330 - N2206 E11400 - N2312 E11554 TOP FL400 MOV NE 15KT=

    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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