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

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Bulletin issued at 03:02 HKT 08/May/2018

At 3 a.m. at the Hong Kong Observatory the air temperature was 24 degrees Celsius and the relative humidity 95 per cent.

A trough of low pressure is bringing unsettled weather to the vicinity of the Pearl River Estuary. Heavy showers and thunderstorms will continue to affect Hong Kong in the next couple of hours. Members of the public should stay on the alert.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 6:00 a.m. today. Scattered 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 23 degrees;
Sha Tin 23 degrees;
Tuen Mun 23 degrees;
Tseung Kwan O 23 degrees;
Sai Kung 23 degrees;
Cheung Chau 23 degrees;
Chek Lap Kok 25 degrees;
Tsing Yi 23 degrees;
Shek Kong 23 degrees;
Tsuen Wan Ho Koon 23 degrees;
Tsuen Wan Shing Mun Valley 23 degrees;
Hong Kong Park 24 degrees;
Shau Kei Wan 23 degrees;
Kowloon City 23 degrees;
Happy Valley 24 degrees;
Wong Tai Sin 23 degrees;
Stanley 24 degrees;
Kwun Tong 23 degrees;
Sham Shui Po 23 degrees;
Kai Tak Runway Park 24 degrees;
Yuen Long Park 23 degrees;
Tai Mei Tuk 23 degrees.

Between 1:45 and 2:45 a.m., lightning was detected within New Territories East, New Territories West, Hong Kong and Kowloon. The rainfall recorded in various regions were:

Tuen Mun 1 to 14 mm;
Islands District 0 to 10 mm;
Yuen Long 0 to 3 mm;
Central & Western District 0 to 1 mm;
Kowloon City 0 to 1 mm;
Kwai Tsing 0 to 1 mm;
Sai Kung 0 to 1 mm;
Yau Tsim Mong 0 to 1 mm;
Southern District 0 to 1 mm;
Kwun Tong 0 to 1 mm.


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


Climatological Information for 8 May

Regional Weather in Hong Kong

Information on Tropical Cyclones

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Bulletin updated at 02:45 HKT 08/May/2018

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

A trough of low pressure is bringing heavy showers and thunderstorms to the coast of Guangdong. Locally, more than 20 millimetres were recorded over most parts of the territory in the last few hours.

Weather forecast for today

Cloudy with showers. Showers will be heavy at times in the morning with squally thunderstorms. Temperatures will range between 23 and 27 degrees. Light to moderate southerly winds.

Outlook : There will still be heavy showers and thunderstorms on Wednesday. Showers will ease off gradually in the latter part of this week.


(The above forecast period is valid up to 23:59 HKT today, 08/05/2018; 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 21:00 HKT 07/May/2018

N0 WARNING.

GENERAL SITUATION AT 070900 UTC:
TROUGH 23N 105E 23N 112E 28N 120E 35N 140E S 8KT.

MARINE FORECAST FOR 24 HOURS FROM 071300 UTC:

HONG KONG= S 4-5, OCNL 6. DOWN TO 2000 M IN ISOL HEAVY SQUALLY SHOWERS AND TS. SEA UP TO 3 M. TEMP 25-28 C. =
KWANGTUNG= S 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 3 M. =
TAIWAN STRAIT= SW 5-6, NE 5 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. =
BASHI= W TO SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
PRATAS= SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
BALINTANG= W TO SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
SCARBOROUGH= S TO SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= S TO SW 4-5, OCNL 6. ISOL SHOWERS AND TS. SEA UP TO 3 M. =
TONKIN= S 5-6, BEC NE 5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. =
DANANG= S 4-5, OCNL 6. 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
  • 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 03:30 HKT 08/May/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 08 May 2018

    Warnings:
    Strong winds in Hong Kong adjacent waters, south of Hong Kong and Shangchuan Dao.

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

    Area forecasts for the next 24 hours

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

    Nan'ao and Shanwei:
    South to southwest force 4 to 5.
    Isolated squally showers and thunderstorms.
    Moderate seas.

    South of Hong Kong and Shangchuan Dao:
    South force 4 to 5, occasionally force 6.
    Isolated 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 to 7. Isolated showers and thunderstorms.

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

    Waglan Island Wind north force 4
      Visibility 5000 Metres

    Shantou Wind west-northwest force 1
      Visibility 30 Kilometres

    Huangmaozhou Wind west-southwest force 3

    Macau Wind north-northeast force 3
      Visibility 6 Kilometres

    Xisha Wind south-southwest force 4
      Visibility 20 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 01:30 HKT 08/MAY/2018
    (Next update at 9:00-9:30 HKT 08/MAY/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     SEV TURB. 
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A SOUTHERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.  A TROUGH OF LOW PRESSURE
     IS BRINGING THUNDERY SHOWERS TO THE COAST OF
     GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  160/5-10
                  TEMPO VRB/20G35 IN TS
       OFFSHORE:  160/10-15, OCNL 20                   23-29
   B.   2000 FT:  290/20                               24
   C.   5000 FT:  250/20                               18
   D.  10000 FT:  260/25                               10
   E.  18000 FT:  250/30                               MS4
   F.  24000 FT:  250/30                               MS14
   G.  30000 FT:  270/40                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      CLOUDY WITH SHOWERS AND SQUALLY THUNDERSTORMS.
      SHOWERS WILL BE HEAVY AT TIMES.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT  SCT 2500 FT  BKN 8000 FT.  TEMPO
      FEW 600 FT  SCT CB 1200 FT  BKN 4000 FT.
   K. VISIBILITY    : 10 KM.  TEMPO 3000 M IN SHOWERS.  TEMPO 1500 M IN TS.
   L. 0 DEG. C LEVEL: 16000 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS.  MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.0-2.0 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTHERLY WINDS.  CLOUDY WITH SHOWERS
     AND ISOLATED SQUALLY 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 01:53 HKT on 08 May 18

    VHHK SIGMET 1 VALID 071400/071800 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2218 E11324 - N2230 E11342 - N2342 E11730 - N2236 E11730 - N2142 E11354 - N2218 E11324 TOP FL450 MOV ESE 20KT NC= VHHK SIGMET 2 VALID 071800/072200 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2154 E11230 - N2230 E11342 - N2342 E11730 - N2136 E11730 - N2054 E11306 - N2154 E11230 TOP FL450 MOV ESE 20KT 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 08/May/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     29.6 C
Minimum Air Temperature                     24.4 C
Grass Minimum Temperature                   23.7 C
Relative Humidity                        78 - 88 Percent
Rainfall                                     6.7 mm 
Total rainfall since 1st January           124.1 mm
Against an average of                      397.9 mm

Other Stations                Min                  Max
King's Park                  23.4 C               30.4 C
Wong Chuk Hang               26.0 C               28.3 C
Ta Kwu Ling                  22.7 C               32.2 C
Tai Po                       22.6 C               29.6 C
Sha Tin                      23.3 C               29.9 C
Tuen Mun                     23.6 C               31.3 C
Tseung Kwan O                23.4 C               29.0 C
Sai Kung                     23.4 C               30.2 C
Cheung Chau                  24.3 C               30.1 C
Chek Lap Kok                 23.7 C               33.3 C
Tsing Yi                     23.5 C               28.0 C
Shek Kong                    23.3 C               31.3 C
Tsuen Wan Ho Koon            22.5 C               26.4 C
Tsuen Wan Shing Mun Valley   23.1 C               27.9 C
Hong Kong Park               24.4 C               28.3 C
Shau Kei Wan                 23.8 C               28.2 C
Kowloon City                 22.5 C               30.7 C
Happy Valley                 25.7 C               28.5 C
Wong Tai Sin                 22.8 C               29.7 C
Stanley                      25.6 C               29.8 C
Kwun Tong                    23.8 C               29.0 C
Sham Shui Po                 22.9 C               29.7 C
Kai Tak Runway Park          24.0 C               29.8 C
Yuen Long Park               23.6 C               32.4 C
Tai Mei Tuk               22.9 C               29.0 C

Duration of sunshine (King's Park):              2.6 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.
Sea surface temperature (Waglan Island):        24.7 C 

Yesterday's (07 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                           0.11
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 07 May
     2003copy right image | Important notices | Privacy policy Last revision date: <08 May 2018> 

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