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Bulletin issued at 12:02 HKT 09/May/2018

At noon at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 88 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 1:30 p.m. today. Isolated thunderstorms are expected to occur over Lantau, Southern Waters and Islands of Hong Kong.

The air temperatures at other places were:

King's Park 25 degrees;
Wong Chuk Hang 26 degrees;
Ta Kwu Ling 26 degrees;
Lau Fau Shan 26 degrees;
Tai Po 24 degrees;
Sha Tin 25 degrees;
Tuen Mun 25 degrees;
Tseung Kwan O 24 degrees;
Sai Kung 25 degrees;
Cheung Chau 25 degrees;
Chek Lap Kok 27 degrees;
Tsing Yi 26 degrees;
Shek Kong 26 degrees;
Tsuen Wan Ho Koon 24 degrees;
Tsuen Wan Shing Mun Valley 25 degrees;
Hong Kong Park 25 degrees;
Shau Kei Wan 24 degrees;
Kowloon City 25 degrees;
Happy Valley 25 degrees;
Wong Tai Sin 25 degrees;
Stanley 25 degrees;
Kwun Tong 24 degrees;
Sham Shui Po 26 degrees;
Kai Tak Runway Park 25 degrees;
Yuen Long Park 27 degrees;
Tai Mei Tuk 24 degrees.

Between 10:45 and 11:45 a.m., lightning was detected within Lantau and New Territories West. The rainfall recorded in various regions were:

North District 0 to 1 mm;
Tai Po 0 to 1 mm;
Tuen Mun 0 to 1 mm.

0.2 millimetre of rainfall was recorded at the Hong Kong Observatory between midnight last night and midday today.


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


Climatological Information for 9 May

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 12:15 HKT 09/May/2018

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

A trough of low pressure is bringing showers to the coast of western Guangdong and the northern part of the South China Sea. Meanwhile, a strong easterly airstream is affecting the coastal areas of southeastern China.

Weather forecast for this afternoon and tonight

Cloudy with occasional showers. A few thunderstorms at first. Moderate to fresh easterly winds, occasionally strong offshore.

Outlook : Showers easing off in the next couple of days. Brighter over the weekend. Hot early next week.


(The above forecast period is valid up to 23:59 HKT today, 09/05/2018; 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 09/May/2018

N0 WARNING.

GENERAL SITUATION AT 082100 UTC:
TROUGH 20N 106E 20N 110E 21N 114E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 090100 UTC:

HONG KONG= E 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL E 2 M. TEMP 26-23 C. =
KWANGTUNG= E TO NE 6-7, 5 IN W AT FIRST. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M, UP TO 2 M IN W AT FIRST. SWELL E TO NE 2-3 M. =
TAIWAN STRAIT= NE 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL NE 2-3 M. =
BASHI= E TO NE 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL NE 2-3 M. =
PRATAS= E 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL E TO NE 2 M. =
BALINTANG= E TO NE 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL NE 2-3 M. =
SCARBOROUGH= S TO SW 4-5, BEC E TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL NE 2 M. =
PARACEL= S TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E TO NE 2 M. =
TONKIN= E TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E TO NE UP TO 2 M. =
DANANG= S TO SE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL E TO NE UP TO 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 12:30 HKT 09/May/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 09 May 2018

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    A trough of low pressure is bringing unsettled weather to the south China coastal waters. Meanwhile, an easterly airstream is affecting the region.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East force 5 to 6, occasionally force 7.
    Scattered squally showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao and Shanwei:
    East to northeast force 6 to 7.
    Scattered squally showers and thunderstorms.
    Rough seas.

    South of Hong Kong and Shangchuan Dao:
    East force 6 to 7.
    Scattered squally showers and thunderstorms.
    Rough seas.

    Outlook for the next 48 hours
    East to southeasterly winds of force 5 to 6, up to force 7 in east at first. Isolated showers and thunderstorms.

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

    Waglan Island Wind east force 5
      Visibility 9 Kilometres

    Shantou Wind northeast force 3
      Visibility 30 Kilometres

    Huangmaozhou Wind east force 6

    Macau Wind east force 3
      Visibility 6 Kilometres

    Xisha Wind south force 2
      Visibility 19 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 12:30 HKT 09/MAY/2018
    (Next update at 17:30 HKT 09/MAY/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A TROUGH OF LOW PRESSURE IS BRINGING UNSETTLED
     WEATHER TO THE SOUTH CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  090/10-15
                  TEMPO VRB/15G35 IN TS
       OFFSHORE:  090/20-25                            27-23
   B.   2000 FT:  120/20-25                            22
   C.   5000 FT:  170/15                               18
   D.  10000 FT:  230/15                               9
   E.  18000 FT:  250/20                               MS5
   F.  24000 FT:  160/10                               MS15
   G.  30000 FT:  300/25                               MS26
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      2400-2800 FT
   I. WEATHER       : 
      CLOUDY WITH OCCASIONAL SHOWERS AND
      THUNDERSTORMS. SHOWERS WILL BE HEAVY AT TIMES.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT  SCT 2500 FT  BKN 8000 FT.  TEMPO
      FEW CB 800 FT  SCT 1500 FT  BKN 4000 FT.
   K. VISIBILITY    : 9 KM.  TEMPO 3000 M IN SHOWERS.  TEMPO 1500 M IN TS.
   L. 0 DEG. C LEVEL: 14500 FT      10 DEG. C LEVEL(S) : 9600 FT
   M. TURBULENCE    : MOD TO SEV
   N. SEA STATE     : 3.0-4.0 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     FRESH TO STRONG EASTERLY WINDS. CLOUDY WITH
     OCCASIONAL SHOWERS AND THUNDERSTORMS. SHOWERS
     WILL BE HEAVY AT TIMES.=

    ===================================================================
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 11:53 HKT on 09 May 18

    VHHK SIGMET 1 VALID 090355/090755 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11430 - N2012 E11148 - N2130 E11148 - N2218 E11430 - N2100 E11430 TOP FL380 MOV ENE 15KT NC= VHHK SIGMET 6 VALID 082355/090355 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2048 E11442 - N1948 E11130 - N2130 E11130 - N2248 E11430 - N2048 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 09/May/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     27.1 C
Minimum Air Temperature                     23.7 C
Grass Minimum Temperature                   23.0 C
Relative Humidity                        81 - 97 Percent
Rainfall                                    28.4 mm 
Total rainfall since 1st January           156.3 mm
Against an average of                      417.2 mm

Other Stations                Min                  Max
King's Park                  23.2 C               27.5 C
Wong Chuk Hang               23.1 C               27.7 C
Ta Kwu Ling                  22.7 C               28.5 C
Lau Fau Shan                 22.5 C               27.4 C
Tai Po                       22.3 C               25.9 C
Sha Tin                      22.6 C               27.6 C
Tuen Mun                     23.1 C               27.4 C
Tseung Kwan O                22.7 C               26.9 C
Sai Kung                     23.0 C               27.0 C
Cheung Chau                  23.0 C               26.4 C
Chek Lap Kok                 23.4 C               27.8 C
Tsing Yi                     23.0 C               27.9 C
Shek Kong                    23.1 C               28.2 C
Tsuen Wan Ho Koon            22.3 C               26.0 C
Tsuen Wan Shing Mun Valley   22.8 C               27.6 C
Hong Kong Park               23.0 C               27.0 C
Shau Kei Wan                 22.5 C               26.6 C
Kowloon City                 22.4 C               27.8 C
Happy Valley                 23.4 C               28.8 C
Wong Tai Sin                 22.7 C               27.6 C
Stanley                      23.3 C               26.8 C
Kwun Tong                    22.9 C               28.0 C
Sham Shui Po                 22.8 C               28.0 C
Kai Tak Runway Park          22.7 C               27.1 C
Yuen Long Park               22.9 C               28.5 C
Tai Mei Tuk               22.6 C               27.3 C

Duration of sunshine (King's Park):              0.1 H
The mean UV index recorded at King's Park yesterday was 1,
the UV intensity was Low.
The maximum UV index for yesterday was 5.
Sea surface temperature (Waglan Island):        25.4 C 

Yesterday's (08 May 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                        0.13

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 08 May
     2003copy right image | Important notices | Privacy policy Last revision date: <09 May 2018> 

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