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Bulletin issued at 13:02 HKT 28/May/2019

At 1 p.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 96 per cent.
During the past hour the mean UV Index recorded at King's Park was 1. The intensity of UV radiation was low.

Though rainstorm warning has been cancelled, people should stay alert to the danger that may be brought about by river flooding.

The air temperatures at other places were:

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

Between 11:45 a.m. and 12:45 p.m., lightning was detected over all regions. The rainfall recorded in various regions were:

Tsuen Wan 2 to 4 mm;
Yuen Long 0 to 4 mm;
Tuen Mun 2 to 4 mm;
Sha Tin 0 to 3 mm;
Kwai Tsing 1 to 3 mm;
Sai Kung 1 to 3 mm;
Tai Po 0 to 3 mm;
Sham Shui Po 2 to 3 mm;
Central & Western District 0 to 3 mm;
Southern District 1 to 2 mm;
North District 0 to 2 mm;
Wong Tai Sin 2 mm;
Islands District 0 to 2 mm;
Yau Tsim Mong 2 mm;
Wan Chai 2 mm;
Kowloon City 1 to 2 mm;
Eastern District 1 to 2 mm;
Kwun Tong 2 mm.


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


Climatological Information for 28 May

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

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UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 12:45 HKT 28/May/2019

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

A trough of low pressure is bringing thundery showers to the coastal areas of Guangdong. Locally, more than 30 millimetres of rainfall were recorded over many places this morning, and rainfall even exceeded 70 millimetres over Tsuen Wan and Lantau Island.

Weather forecast for this afternoon and tonight

Mainly cloudy with showers and squally thunderstorms. Light winds, becoming moderate easterlies overnight.

Outlook : Occasional showers in the next couple of days. There will still be thunderstorms tomorrow.


(The above forecast period is valid up to 23:59 HKT today, 28/05/2019; 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 28/May/2019

N0 WARNING.

GENERAL SITUATION AT 272100 UTC:
TROUGH 22N 109E 22N 112E 23N 116E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 280100 UTC:

HONG KONG= S 4-5, E 5 LATER. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL S UP TO 2 M. TEMP 29-24 C. =
KWANGTUNG= S 4-5, BEC E 5-6. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA 2 M, BEC 3 M. SWELL S UP TO 2 M. =
TAIWAN STRAIT= NE 6-7, S TO SW 4-5 IN S AT FIRST. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-4 M. SWELL S UP TO 2 M. =
BASHI= S TO SW 4-5, N 5-6 LATER. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2 M, 3 M LATER. SWELL SE UP TO 2 M. =
PRATAS= S 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL S UP TO 2 M. =
BALINTANG= S TO SW 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL SE UP TO 2 M. =
SCARBOROUGH= S 4-5. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL S UP TO 2 M. =
PARACEL= S 4-5. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL S UP TO 2 M. =
TONKIN= S 4-5. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL S UP TO 2 M. =
DANANG= S 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL S 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.


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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 12:30 HKT 28/May/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 28 May 2019

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

    Weather Situation:
    A trough of low pressure is bringing thundery showers to the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    South force 4 to 5, becoming east force 5 to 6 later.
    Scattered heavy squally showers and thunderstorms.
    Moderate seas, becoming rough later.

    Nan'ao:
    South force 4 to 5, becoming east up to force 7.
    Scattered heavy squally showers and thunderstorms.
    Moderate seas, becoming rough.

    Shanwei and South of Hong Kong:
    South force 4 to 5, becoming east force 5 to 6 later.
    Scattered heavy squally showers and thunderstorms.
    Moderate seas, becoming rough later.

    Shangchuan Dao:
    South force 4 to 5.
    Scattered heavy squally showers and thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    Easterly winds of force 6 to 7, becoming southerly winds of force 4 to 5 later. Scattered squally showers and thunderstorms.

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

    Waglan Island Wind west force 4
      Visibility 11 Kilometres

    Shantou Wind south-southeast force 1
      Visibility 30 Kilometres

    Dongsha Wind southwest force 2
      Visibility 10 Kilometres

    Huangmaozhou Wind west-southwest force 3

    Macau Wind south-southeast force 1
      Visibility 18 Kilometres

    Xisha Wind south force 3
      Visibility 21 Kilometres

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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 12:30 HKT 28/MAY/2019
    (Next update at 17:30 HKT 28/MAY/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A TROUGH OF LOW PRESSURE IS BRINGING THUNDERY
     SHOWERS TO THE COASTAL AREAS OF GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  140/5-10
                  TEMPO VRB/20G35 IN TS
       OFFSHORE:  180/10-15                            28-25
   B.   2000 FT:  210/10-15, 20 AT FIRST               23
   C.   5000 FT:  240/15                               18
   D.  10000 FT:  250/15                               11
   E.  18000 FT:  280/10                               MS3
   F.  24000 FT:  040/10                               MS13
   G.  30000 FT:  030/10                               MS24
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH SHOWERS AND SQUALLY
      THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1200 FT SCT 2500 FT. TEMPO FEW CB 800 FT
      SCT 1500 FT BKN 4000 FT.
   K. VISIBILITY    : 7 KM. TEMPO 3000 M IN SHOWERS. 
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 10600 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS. MOD AT LOW LEVELS
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 26 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EASTERLY WINDS, OCCASIONALLY FRESH
     OFFSHORE LATER. MAINLY CLOUDY WITH OCCASIONAL
     SHOWERS AND ISOLATED 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.

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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.

    There is no Significant Weather Information (SIGMET)

    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 28/May/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     28.0 C
Minimum Air Temperature                     25.4 C
Grass Minimum Temperature                   25.5 C
Relative Humidity                        87 - 97 Percent
Rainfall                                    27.8 mm 
Total rainfall since 1st January           619.0 mm
Against an average of                      581.8 mm

Other Stations                Min                  Max
King's Park                  24.9 C               27.7 C
Wong Chuk Hang               24.4 C               27.7 C
Ta Kwu Ling                  24.3 C               27.6 C
Lau Fau Shan                 23.7 C               25.9 C
Tai Po                       24.7 C               26.3 C
Sha Tin                      25.2 C               27.9 C
Tuen Mun                     24.8 C               26.9 C
Tseung Kwan O                24.6 C               27.3 C
Sai Kung                     25.4 C               27.6 C
Cheung Chau                  23.9 C               27.6 C
Chek Lap Kok                 25.0 C               28.9 C
Tsing Yi                     25.1 C               28.0 C
Shek Kong                    25.0 C               28.2 C
Tsuen Wan Ho Koon            24.2 C               26.4 C
Tsuen Wan Shing Mun Valley   24.8 C               27.5 C
Hong Kong Park               24.4 C               27.6 C
Shau Kei Wan                 24.7 C               27.0 C
Kowloon City                 25.0 C               28.0 C
Happy Valley                 24.8 C               28.5 C
Wong Tai Sin                 25.2 C               28.4 C
Stanley                      24.4 C               27.7 C
Kwun Tong                    25.3 C               28.4 C
Sham Shui Po                 25.2 C               28.2 C
Kai Tak Runway Park          25.2 C               28.0 C
Yuen Long Park               24.8 C               27.0 C
Tai Mei Tuk               24.5 C               27.2 C

Duration of sunshine (King's Park):              0.0 H
The mean UV index recorded at King's Park yesterday was 0.9,
the UV intensity was Low.
The maximum UV index for yesterday was 2.
 

Yesterday's (27 May 2019) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 to
0.14 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                           0.09
Tap Mun                             0.09
Kat O                               0.10
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.11
Sha Tau Kok                         0.10
Kwun Tong                           0.13
Sai Wan Ho                          0.10
King's Park                         0.14
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 27 May
     2003copy right image | Important notices | Privacy policy Last revision date: <28 May 2019> 

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