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Bulletin issued at 11:02 HKT 04/Mar/2018

At 11 a.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 84 per cent.
During the past hour the mean UV Index recorded at King's Park was 1. The intensity of UV radiation was low.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 12:45 p.m. today. Isolated thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

King's Park 24 degrees;
Wong Chuk Hang 24 degrees;
Ta Kwu Ling 23 degrees;
Lau Fau Shan 23 degrees;
Tai Po 22 degrees;
Sha Tin 23 degrees;
Tuen Mun 23 degrees;
Tseung Kwan O 23 degrees;
Sai Kung 21 degrees;
Cheung Chau 22 degrees;
Chek Lap Kok 25 degrees;
Tsing Yi 23 degrees;
Shek Kong 24 degrees;
Tsuen Wan Ho Koon 22 degrees;
Tsuen Wan Shing Mun Valley 23 degrees;
Hong Kong Park 24 degrees;
Shau Kei Wan 22 degrees;
Kowloon City 23 degrees;
Happy Valley 25 degrees;
Wong Tai Sin 24 degrees;
Stanley 21 degrees;
Kwun Tong 24 degrees;
Sham Shui Po 23 degrees;
Kai Tak Runway Park 23 degrees;
Yuen Long Park 24 degrees;
Tai Mei Tuk 23 degrees.

Between 9:45 and 10:45 a.m., lightning was detected over all regions. The rainfall recorded in various regions were:

Tai Po 0 to 2 mm;
Islands District 0 to 2 mm;
Tsuen Wan 0 to 2 mm;
Kowloon City 0 to 2 mm;
Sha Tin 0 to 2 mm;
Yau Tsim Mong 0 to 2 mm;
Sham Shui Po 2 mm;
Sai Kung 0 to 1 mm;
Central & Western District 0 to 1 mm;
Kwai Tsing 1 mm;
Yuen Long 0 to 1 mm;
Wong Tai Sin 1 mm.


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


Climatological Information for 4 Mar

Regional Weather in Hong Kong

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Bulletin updated at 10:45 HKT 04/Mar/2018

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

A humid maritime airstream is affecting the coast of Guangdong. Besides, an upper-air disturbance is bringing showers and thunderstorms to the south China coast.

Weather forecast for today

Humid and foggy. Cloudy with a few showers and isolated thunderstorms during the day. Moderate south to southeasterly winds.

Outlook : Humid and foggy tomorrow. It will also be warm during the day. Becoming cool appreciably in the middle and latter parts of this week.


(The above forecast period is valid up to 23:59 HKT today, 04/03/2018; 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 09:00 HKT 04/Mar/2018

N0 WARNING.

GENERAL SITUATION AT 032100 UTC:
A SOUTHERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 040100 UTC:

HONG KONG= S 4-5. DOWN TO 50 M IN FOG PATCHES. ISOL SHOWERS AND TS. SEA UP TO 2 M. TEMP 24-22 C. =
KWANGTUNG= S 4-5, OCNL 6. DOWN TO 100 M IN FOG PATCHES. ISOL SHOWERS AND TS. SEA UP TO 3 M. =
TAIWAN STRAIT= S TO SW 4-5, OCNL 6. DOWN TO 100 M IN FOG PATCHES. ISOL SHOWERS AND TS. SEA UP TO 3 M. =
BASHI= S 4-5, OCNL 6. DOWN TO 100 M IN FOG PATCHES. ISOL SHOWERS AND TS. SEA UP TO 3 M. =
PRATAS= S 4-5. FINE. SEA UP TO 2 M. =
BALINTANG= S TO SE 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. =
SCARBOROUGH= S TO SE 4-5. FINE. SEA UP TO 2 M. =
PARACEL= S 4-5, OCNL 6. DOWN TO 100 M IN FOG PATCHES IN N. ISOL SHOWERS AND TS. SEA UP TO 3 M. =
TONKIN= S 4-5, OCNL 6. DOWN TO 100 M IN FOG PATCHES. ISOL SHOWERS AND TS. SEA UP TO 3 M. =
DANANG= S 4-5, OCNL 6. DOWN TO 100 M IN FOG PATCHES. ISOL SHOWERS AND TS. SEA UP TO 3 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

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    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 09:30 HKT 04/Mar/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 04 March 2018

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

    Weather Situation:
    A southerly airstream is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South force 4 to 5.
    Fog patches. Isolated showers and thunderstorms.
    Moderate seas.

    Nan'ao, Shanwei and South of Hong Kong:
    South force 4 to 5.
    Fog patches. Isolated showers and thunderstorms.
    Moderate seas.

    Shangchuan Dao:
    South force 4 to 5, occasionally force 6.
    Fog patches. Isolated showers and thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    Southerly winds of force 4 to 5, becoming easterly winds of force 6 to 7. Fog patches.

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

    Waglan Island Wind south-southeast force 2
      Visibility 340 Metres

    Shantou Wind north-northeast force 1
      Visibility 5000 Metres in mist

    Dongsha Wind south-southeast force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind southeast force 4

    Macau Wind south force 2
      Visibility 300 Metres in fog

    Xisha Wind south-southeast force 1
      Visibility 13 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 09:30 HKT 04/MAR/2018
    (Next update at 12:30 HKT 04/MAR/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS. 
     FOG.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A SOUTHERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  160/5-10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  160/10-15                            24-28
   B.   2000 FT:  180/15-20                            20
   C.   5000 FT:  210/30                               17
   D.  10000 FT:  230/35                               9
   E.  18000 FT:  240/40                               MS8
   F.  24000 FT:  230/65                               MS20
   G.  30000 FT:  240/75                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH ISOLATED SHOWERS AND
      THUNDERSTORMS.  LOCALISED MIST/FOG.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT SCT 2000 FT BKN 6000 FT TEMPO FEW
      CB 800 FT SCT 1200 FT BKN 4000 FT
   K. VISIBILITY    : 5 KM. TEMPO 3000 M IN SHOWERS. TEMPO 2000 M IN MIST/TS. 
                     TEMPO 200 M IN FOG.
   L. 0 DEG. C LEVEL: 14000 FT      10 DEG. C LEVEL(S) : 9600 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS. MOD NEAR HILLS.
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 19 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTH TO SOUTHEASTERLY WINDS.  MAINLY
     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 15:35 HKT on 22 Feb 18

    VHHK SIGMET 1 VALID 220735/221135 VHHH- VHHK HONG KONG FIR SEV ICE FCST N OF N2030 AND E OF E11300 FL130/210 MOV E 10KT 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 04/Mar/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     23.6 C
Minimum Air Temperature                     21.0 C
Grass Minimum Temperature                   20.3 C
Relative Humidity                        85 - 95 Percent
Rainfall                                     0.0 mm 
Total rainfall since 1st January            66.7 mm
Against an average of                       91.0 mm

Other Stations                Min                  Max
King's Park                  20.7 C               24.0 C
Wong Chuk Hang               20.8 C               25.2 C
Ta Kwu Ling                  20.2 C               26.3 C
Lau Fau Shan                 20.0 C               27.7 C
Tai Po                       20.1 C               22.1 C
Sha Tin                      20.0 C               23.6 C
Tuen Mun                     21.3 C               25.3 C
Tseung Kwan O                19.7 C               21.0 C
Sai Kung                     20.0 C               21.0 C
Cheung Chau                  19.6 C               23.7 C
Chek Lap Kok                 22.4 C               27.7 C
Tsing Yi                     21.9 C               26.8 C
Shek Kong                    20.3 C               28.0 C
Tsuen Wan Ho Koon            21.0 C               24.8 C
Tsuen Wan Shing Mun Valley   21.9 C               26.4 C
Hong Kong Park               20.5 C               23.0 C
Shau Kei Wan                 19.6 C               21.0 C
Kowloon City                 20.5 C               25.1 C
Happy Valley                 20.9 C               25.8 C
Wong Tai Sin                 21.0 C               24.9 C
Stanley                      19.3 C               22.2 C
Kwun Tong                    20.2 C               24.3 C
Sham Shui Po                 21.6 C               25.4 C
Kai Tak Runway Park          19.6 C               22.7 C
Yuen Long Park               20.5 C               28.3 C
Tai Mei Tuk               20.4 C               22.4 C

Duration of sunshine (King's Park):              0.5 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 5.
Sea surface temperature (Waglan Island):        17.4 C 

Yesterday's (03 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                               0.11
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 03 Mar
     2003copy right image | Important notices | Privacy policy Last revision date: <04 Mar 2018> 

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