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Bulletin issued at 12:16 HKT 26/May/2019

At noon at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 87 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.3. 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.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 1:00 p.m. today. A few thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

King's Park 25 degrees;
Wong Chuk Hang 24 degrees;
Ta Kwu Ling 25 degrees;
Lau Fau Shan 24 degrees;
Tai Po 25 degrees;
Sha Tin 26 degrees;
Tuen Mun 24 degrees;
Tseung Kwan O 24 degrees;
Sai Kung 25 degrees;
Cheung Chau 23 degrees;
Chek Lap Kok 25 degrees;
Tsing Yi 25 degrees;
Shek Kong 24 degrees;
Tsuen Wan Ho Koon 24 degrees;
Tsuen Wan Shing Mun Valley 24 degrees;
Hong Kong Park 24 degrees;
Shau Kei Wan 24 degrees;
Kowloon City 24 degrees;
Happy Valley 25 degrees;
Wong Tai Sin 25 degrees;
Stanley 24 degrees;
Kwun Tong 24 degrees;
Sham Shui Po 24 degrees;
Kai Tak Runway Park 24 degrees;
Yuen Long Park 25 degrees;
Tai Mei Tuk 27 degrees.

Between 10:45 and 11:45 a.m., lightning was detected over all regions. The rainfall recorded in various regions were:

Yuen Long 0 to 31 mm;
North District 1 to 22 mm;
Tsuen Wan 3 to 16 mm;
Tuen Mun 5 to 16 mm;
Islands District 1 to 13 mm;
Tai Po 0 to 13 mm;
Wong Tai Sin 7 to 10 mm;
Kwun Tong 4 to 9 mm;
Sai Kung 3 to 8 mm;
Sha Tin 0 to 8 mm;
Eastern District 3 to 8 mm;
Central & Western District 5 to 7 mm;
Kwai Tsing 0 to 6 mm;
Kowloon City 5 to 6 mm;
Sham Shui Po 4 to 5 mm;
Yau Tsim Mong 5 mm;
Southern District 3 to 5 mm;
Wan Chai 4 to 5 mm.

11.2 millimetres of rainfall were 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 26 May

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 12:16 HKT 26/May/2019

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

An unstable southerly airstream is bringing thundery showers to the coast of Guangdong and the northern part of the South China Sea. Locally, heavy showers this morning brought more than 20 millimetres of rainfall to many places, and rainfall even exceeded 40 millimetres over the western part of the New Territories.

Weather forecast for this afternoon and tonight

Mainly cloudy with occasional showers and thunderstorms. Moderate southerly winds.

Outlook : Occasional showers in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 26/05/2019; 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 26/May/2019

N0 WARNING.

GENERAL SITUATION AT 252100 UTC:
A SOUTHERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 260100 UTC:

HONG KONG= S TO SE 4-5, OCNL 6. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL E UP TO 2 M. TEMP 30-27 C. =
KWANGTUNG= S TO SE 4-5, OCNL 6. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL E TO SE 2 M. =
TAIWAN STRAIT= S TO SE 5-6, OCNL 7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL E TO SE 2 M. =
BASHI= SE 5-6, OCNL 7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 4 M. SWELL E TO SE 2 M. =
PRATAS= S TO SE 4-5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL E TO SE 2 M. =
BALINTANG= SE 5-6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL E TO SE 2 M. =
SCARBOROUGH= S TO SE 4-5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL E TO SE 2 M. =
PARACEL= S TO SE 4-5, OCNL 6. DOWN TO 1000 M IN SCT HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL SE UP TO 2 M. =
TONKIN= S 4-5, OCNL 6. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA UP TO 3 M. SWELL SE 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 SE 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.


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    • SOUTH CHINA COASTAL WATERS
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    South China Coastal Waters

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    Bulletin issued at 12:30 HKT 26/May/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 12:30 p.m. on 26 May 2019

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    An unstable southerly airstream is bringing thundery showers to the coastal waters of Guangdong.

    Area forecasts for the next 24 hours

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

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    South force 4 to 5, occasionally force 6.
    Scattered heavy squally 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 later. Isolated squally showers and thunderstorms.

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

    Waglan Island Wind west-southwest force 4
      Visibility 12 Kilometres

    Shantou Wind east-southeast force 1
      Visibility 1800 Metres in rain

    Huangmaozhou Wind south force 3

    Macau Wind south-southwest force 1
      Visibility 6 Kilometres in rain

    Xisha Wind south-southwest force 3
      Visibility 22 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 26/MAY/2019
    (Next update at 17:30 HKT 26/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 SOUTHERLY AIRSTREAM IS BRINGING THUNDERY
     SHOWERS TO THE COAST OF GUANGDONG AND THE
     NORTHERN PART OF THE SOUTH CHINA SEA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1300 TO 2300 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  240/10, OCNL 15
                  TEMPO VRB/15G25 IN TS
                  BECMG 160/10, OCNL 15                28-25
   B.   2000 FT:  190/20, OCNL 25                      23
   C.   5000 FT:  210/15                               18
   D.  10000 FT:  250/15                               11
   E.  18000 FT:  270/20                               MS2
   F.  24000 FT:  290/20                               MS12
   G.  30000 FT:  260/20                               MS24
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH ISOLATED SHOWERS AND
      THUNDERSTORMS. SHOWERS WILL BE HEAVY AT TIMES.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1200 FT SCT 2500 FT. TEMPO FEW CB 800 FT
      SCT 1500 FT BKN 4000 FT.
   K. VISIBILITY    : 9 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 OFFSHORE AND NEAR HILLS
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHERLY 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.

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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 26/May/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     28.9 C
Minimum Air Temperature                     25.1 C
Grass Minimum Temperature                   24.8 C
Relative Humidity                        85 - 95 Percent
Rainfall                                     2.4 mm 
Total rainfall since 1st January           576.1 mm
Against an average of                      563.8 mm

Other Stations                Min                  Max
King's Park                  24.7 C               29.1 C
Wong Chuk Hang               25.7 C               30.0 C
Ta Kwu Ling                  24.7 C               29.8 C
Lau Fau Shan                 24.5 C               30.0 C
Tai Po                       24.7 C               28.1 C
Sha Tin                      25.3 C               30.5 C
Tuen Mun                     25.6 C               30.3 C
Tseung Kwan O                24.5 C               27.8 C
Sai Kung                     25.1 C               29.3 C
Cheung Chau                  24.7 C               31.1 C
Chek Lap Kok                 26.0 C               31.0 C
Tsing Yi                     25.2 C               30.5 C
Shek Kong                    25.0 C               30.6 C
Tsuen Wan Ho Koon            24.0 C               29.2 C
Tsuen Wan Shing Mun Valley   24.9 C               29.9 C
Hong Kong Park               24.5 C               29.6 C
Shau Kei Wan                 24.7 C               27.6 C
Kowloon City                 24.8 C               28.7 C
Happy Valley                 25.7 C               30.7 C
Wong Tai Sin                 25.1 C               29.4 C
Stanley                      25.1 C               28.7 C
Kwun Tong                    24.5 C               29.0 C
Sham Shui Po                 25.1 C               30.1 C
Kai Tak Runway Park          25.2 C               28.6 C
Yuen Long Park               25.7 C               30.6 C
Tai Mei Tuk               24.6 C               30.0 C

Duration of sunshine (King's Park):              1.2 H
The mean UV index recorded at King's Park yesterday was 3,
the UV intensity was Moderate.
The maximum UV index for yesterday was 9.
 

Yesterday's (25 May 2019) 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                             0.08
Kat O                               0.10
Yuen Ng Fan                         0.11
Tai Mei Tuk                         0.11
Sha Tau Kok                         0.10
Kwun Tong                           0.12
Sai Wan Ho                          0.09
King's Park                         0.14
Tsim Bei Tsui                       0.13
Cape D'Aguilar                      0.12
Chek Lap Kok                        0.15

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 25 May
     2003copy right image | Important notices | Privacy policy Last revision date: <26 May 2019> 

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