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Bulletin issued at 11:02 HKT 05/Jul/2018

At 11 a.m. at the Hong Kong Observatory the air temperature was 31 degrees Celsius and the relative humidity 79 per cent.
During the past hour the mean UV Index recorded at King's Park was 3. The intensity of UV radiation was moderate.

Announcement on Localised Heavy Rain: More than 70 millimetres of rainfall were recorded in Tai Po District in the past 1 hour ending at 10:55 a.m. and may cause serious flooding.

Hot weather might cause adverse health effects. The Observatory advises the public to stay on the alert.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 1:00 p.m. today. Isolated thunderstorms are expected to occur over Lantau and New Territories.

The air temperatures at other places were:

King's Park 30 degrees;
Wong Chuk Hang 30 degrees;
Ta Kwu Ling 29 degrees;
Lau Fau Shan 29 degrees;
Tai Po 27 degrees;
Sha Tin 31 degrees;
Tuen Mun 30 degrees;
Tseung Kwan O 30 degrees;
Sai Kung 29 degrees;
Cheung Chau 31 degrees;
Chek Lap Kok 32 degrees;
Tsing Yi 29 degrees;
Shek Kong 29 degrees;
Tsuen Wan Ho Koon 26 degrees;
Tsuen Wan Shing Mun Valley 27 degrees;
Hong Kong Park 30 degrees;
Shau Kei Wan 31 degrees;
Kowloon City 31 degrees;
Happy Valley 30 degrees;
Wong Tai Sin 31 degrees;
Stanley 31 degrees;
Kwun Tong 30 degrees;
Sham Shui Po 31 degrees;
Kai Tak Runway Park 30 degrees;
Yuen Long Park 29 degrees;
Tai Mei Tuk 26 degrees.

Between 9:45 and 10:45 a.m., lightning was detected within New Territories East and New Territories West. The rainfall recorded in various regions were:

Tai Po 0 to 64 mm;
Tsuen Wan 4 to 49 mm;
Sai Kung 0 to 18 mm;
Kwai Tsing 0 to 10 mm;
Tuen Mun 0 to 9 mm;
North District 0 to 8 mm;
Islands District 0 to 3 mm;
Yuen Long 0 to 1 mm.


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


Climatological Information for 5 Jul

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Bulletin updated at 11:00 HKT 05/Jul/2018

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

The southwest monsoon is bringing showers to the coast of Guangdong. Locally, more than 40 millimetres of rainfall were recorded over Tai Po and Kwai Chung this morning.

Weather forecast for today

Mainly cloudy. There will be showers at first and showers will be heavier with thunderstorms in isolated areas. Hot in the afternoon. Moderate south to southwesterly winds.

Outlook : Hot with sunny periods in the next few days.


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

GALE WARNING AREAS: TAIWAN STRAIT AND BASHI.

GENERAL SITUATION AT 042100 UTC:
THE SOUTHWEST MONSOON IS AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 050100 UTC:

HONG KONG= S TO SW 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. SWELL SW UP TO 2 M. TEMP 32-28 C. =
KWANGTUNG= S TO SW 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
TAIWAN STRAIT= S TO SW 6-7, OCNL 8. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL SW 3 M. =
BASHI= SW 6-7, OCNL 8. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 6 M. SWELL SW 3 M. =
PRATAS= SW 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
BALINTANG= SW 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL SW 2-3 M. =
SCARBOROUGH= S TO SW 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
PARACEL= S TO SW 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL SW 2 M. =
TONKIN= S TO SW 5-6, OCNL 7. ISOL SHOWERS AND TS. SEA UP TO 4 M. SWELL S UP TO 2 M. =
DANANG= S TO SW 5-6. ISOL SHOWERS AND TS. SEA 2-3 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.


  • 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 09:30 HKT 05/Jul/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 05 July 2018

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

    Weather Situation:
    The southwest monsoon is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

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

    Nan'ao, Shanwei, South of Hong Kong and Shangchuan Dao:
    South to southwest force 5 to 6.
    Isolated showers and thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    South to southwesterly winds of force 5 to 6, becoming southeasterly winds of force 5 later. Isolated showers and thunderstorms.

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

    Waglan Island Wind south-southwest force 5
      Visibility 20 Kilometres

    Shantou Wind west-southwest force 2
      Visibility 30 Kilometres

    Huangmaozhou Wind south-southwest force 4

    Macau Wind south force 2
      Visibility 14 Kilometres

    Xisha Wind south-southwest force 3
      Visibility 16 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 09:00 HKT 05/JUL/2018
    (Next update at 12:30 HKT 05/JUL/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE SOUTHWEST MONSOON IS BRINGING SHOWERS TO THE
     COAST OF GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  210/10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  210/15-20                            29-34
   B.   2000 FT:  220/20                               25
   C.   5000 FT:  230/15                               21
   D.  10000 FT:  230/15                               12
   E.  18000 FT:  150/10                               MS1
   F.  24000 FT:  090/15                               MS11
   G.  30000 FT:  080/30                               MS24
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS.  ISOLATED
      THUNDERSTORMS AT FIRST.  SUNNY PERIODS DURING
      THE DAY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1200 FT  SCT 3000 FT.  FEW CB 1000 FT  SCT 2000 FT
      BKN 4000 FT.
   K. VISIBILITY    : 10 KM.  TEMPO 4000 M IN SHOWERS.
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 11000 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS.
                      MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.0 M         SEA TEMPERATURE    : 27 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE SOUTH TO SOUTHWESTERLY WINDS.  MAINLY
     CLOUDY WITH A FEW SHOWERS.=

    ===================================================================
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 17:45 HKT on 03 Jul 18

    VHHK SIGMET 1 VALID 030556/030956 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2300 E11730 - N2200 E11542 - N2242 E11424 - N2400 E11730 - N2300 E11730 TOP FL420 MOV NE 10KT NC= VHHK SIGMET 2 VALID 030956/031315 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2230 E11730 - N2206 E11554 - N2242 E11518 - N2354 E11730 - N2230 E11730 TOP FL380 MOV NE 10KT WKN=

    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 05/Jul/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     32.6 C
Minimum Air Temperature                     28.4 C
Grass Minimum Temperature                   26.8 C
Relative Humidity                        68 - 86 Percent
Rainfall                                     3.4 mm 
Total rainfall since 1st January           658.8 mm
Against an average of                     1143.9 mm

Other Stations                Min                  Max
King's Park                  27.9 C               32.6 C
Wong Chuk Hang               28.7 C               31.1 C
Ta Kwu Ling                  25.9 C               32.9 C
Lau Fau Shan                 26.8 C               33.0 C
Tai Po                       27.8 C               32.5 C
Sha Tin                      28.6 C               32.1 C
Tuen Mun                     26.2 C               32.2 C
Tseung Kwan O                28.3 C               33.7 C
Sai Kung                     28.4 C               32.8 C
Cheung Chau                  27.2 C               32.7 C
Chek Lap Kok                 27.1 C               33.9 C
Tsing Yi                     28.4 C               31.9 C
Shek Kong                    25.9 C               33.7 C
Tsuen Wan Ho Koon            26.7 C               30.3 C
Tsuen Wan Shing Mun Valley   27.5 C               31.4 C
Hong Kong Park               27.9 C               31.7 C
Shau Kei Wan                 28.9 C               32.3 C
Kowloon City                 26.9 C               32.5 C
Happy Valley                 28.8 C               32.1 C
Wong Tai Sin                 27.2 C               33.2 C
Stanley                      28.5 C               30.8 C
Kwun Tong                    28.4 C               32.4 C
Sham Shui Po                 28.3 C               32.7 C
Kai Tak Runway Park          28.6 C               31.9 C
Yuen Long Park               25.7 C               34.0 C
Tai Mei Tuk               26.9 C               31.6 C

Duration of sunshine (King's Park):              9.0 H
The mean UV index recorded at King's Park yesterday was 5,
the UV intensity was Moderate.
The maximum UV index for yesterday was 10.
Sea surface temperature (Waglan Island):        25.4 C 

Yesterday's (04 Jul 2018) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 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                             0.08
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                          0.08
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 04 Jul
     2003copy right image | Important notices | Privacy policy Last revision date: <05 Jul 2018> 

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