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Bulletin issued at 23:02 HKT 18/Sep/2019

At 11 p.m. at the Hong Kong Observatory the air temperature was 26 degrees Celsius and the relative humidity 92 per cent.

Gusts reaching 90 kilometres per hour or above may affect Hong Kong.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 12:30 a.m. tomorrow. Squally thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

King's Park 25 degrees;
Wong Chuk Hang 25 degrees;
Ta Kwu Ling 27 degrees;
Lau Fau Shan 27 degrees;
Tai Po 27 degrees;
Sha Tin 26 degrees;
Tuen Mun 27 degrees;
Tseung Kwan O 25 degrees;
Sai Kung 26 degrees;
Cheung Chau 24 degrees;
Chek Lap Kok 28 degrees;
Tsing Yi 25 degrees;
Shek Kong 27 degrees;
Tsuen Wan Ho Koon 25 degrees;
Tsuen Wan Shing Mun Valley 25 degrees;
Hong Kong Park 25 degrees;
Shau Kei Wan 26 degrees;
Kowloon City 25 degrees;
Happy Valley 25 degrees;
Wong Tai Sin 25 degrees;
Stanley 26 degrees;
Kwun Tong 26 degrees;
Sham Shui Po 25 degrees;
Kai Tak Runway Park 26 degrees;
Yuen Long Park 27 degrees;
Tai Mei Tuk 27 degrees.

Between 9:45 and 10:45 p.m., lightning was detected over all regions. The rainfall recorded in various regions were:

Islands District 0 to 19 mm;
Central & Western District 0 to 5 mm;
Southern District 0 to 2 mm;
Sham Shui Po 0 to 1 mm;
Eastern District 0 to 1 mm;
Kwai Tsing 0 to 1 mm;
Wong Tai Sin 0 to 1 mm.


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


Climatological Information for 18 Sep

Regional Weather in Hong Kong

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Bulletin updated at 23:15 HKT 18/Sep/2019

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

An anticyclone aloft covered southeastern China while showers affected the coast of Guangdong today. Locally, it was hot with sunny periods. There were occasional showers and squally thunderstorms in the morning and at night. More than 10 millimetres of rainfall were recorded in many places. The anticyclone aloft is expected to bring mainly fine and very hot weather to southern China in the next couple of days.

Besides, an area of low pressure intensified into a tropical depression over the vicinity to the east of Taiwan this morning. At 11 p.m., the tropical depression was centred about 840 kilometres east-southeast of Taibei. It is forecast to be slow-moving.

Weather forecast for Hong Kong (Thursday, 19 Sep 2019)

Isolated showers and squally thunderstorms at first. The minimum temperature will be about 26 degrees. Becoming fine and hot during the day. The maximum temperature will be around 32 degrees in the urban areas, and a couple of degrees higher in the New Territories. Moderate east to northeasterly winds.

Outlook : Fine and dry in the following few days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 19/09/2019; 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 21:00 HKT 18/Sep/2019

GALE WARNING AREA: TAIWAN STRAIT.

GENERAL SITUATION AT 180900 UTC:
AN EASTERLY AIRSTREAM IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 181300 UTC:

HONG KONG= E TO NE 4-5. ISOL SHOWERS AND SQUALLY TS. SEA UP TO 2 M. SWELL E TO NE 2 M. TEMP 27-33 C. =
KWANGTUNG= E TO NE 5-6, 7 IN E. ISOL SHOWERS. SEA 2-3 M, UP TO 4 M IN E. SWELL E TO NE 2 M. =
TAIWAN STRAIT= NE 7-8. FINE. SEA 4-6 M. SWELL NE 2-3 M. =
BASHI= N TO NE 6-7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 2-3 M. =
PRATAS= NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL NE 2 M. =
BALINTANG= N TO NE 6-7. DOWN TO 2000 M IN SCT SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 2-3 M. =
SCARBOROUGH= N TO NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL NE 2 M. =
PARACEL= E TO NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
TONKIN= N TO NE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= N TO NE 4-5. ISOL SHOWERS AND TS. SEA 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

    Current Weather | Local Weather Forecast | Regional Temperature Forecast in HK
    9-day Weather Forecast | UV Index Forecast | Weather Information for Fishermen

    Bulletin issued at 23:30 HKT 18/Sep/2019

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 18 September 2019

    Warnings:
    Gale force winds in Nan'ao. Strong winds in Shanwei and south of Hong Kong.

    Weather Situation:
    An easterly airstream is affecting the south China coastal waters.

    At 11 p.m., the tropical depression over the vicinity to the east of Taiwan with maximum sustained winds of about 55 kilometres per hour near its centre was located at 22.2 degrees north, 129.2 degrees east. It is forecast to be slow-moving.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 4 to 5.
    Isolated showers and squally thunderstorms.
    Moderate seas.

    Nan'ao:
    Northeast force 6 to 7, occasionally force 8.
    Rough to very rough seas.

    Shanwei:
    East to northeast force 5 to 6.
    Moderate to rough seas.

    South of Hong Kong:
    East to northeast force 4 to 5, occasionally force 6.
    Isolated showers and squally thunderstorms.
    Moderate to rough seas.

    Shangchuan Dao:
    East to northeast force 4 to 5.
    Isolated showers and squally thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 5 to 6, becoming northerly winds of force 5 to 6.

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

    Waglan Island Wind east force 3
      Visibility 23 Kilometres

    Shantou Wind east force 2
      Visibility 30 Kilometres

    Huangmaozhou Wind east-southeast force 4

    Xisha Wind east force 1
      Visibility 30 Kilometres

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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 17:30 HKT 18/SEP/2019
    (Next update at 01:30 HKT 19/SEP/2019)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE ANTICYCLONE ALOFT IS BRINGING GENERALLY FINE
     WEATHER TO SOUTHERN CHINA.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1900 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  080/5-10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  080/15-20                            33-27
   B.   2000 FT:  050/15-20                            24
   C.   5000 FT:  050/25                               19
   D.  10000 FT:  060/25                               11
   E.  18000 FT:  070/20                               0
   F.  24000 FT:  070/15                               MS11
   G.  30000 FT:  060/15                               MS23
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY FINE. ISOLATED SHOWERS AND THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2500 FT.
      TEMPO FEW CB 1000 FT SCT 2000 FT BKN 4000 FT
   K. VISIBILITY    : 7 KM. TEMPO 4000 M IN SHOWERS.
                      TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 18000 FT      10 DEG. C LEVEL(S) : 10600 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS. 
                      MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 29 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EAST TO NORTHEASTERLY WINDS. MAINLY
     FINE. ISOLATED 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.

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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 18/Sep/2019 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.8 C
Minimum Air Temperature                     27.9 C
Grass Minimum Temperature                   27.7 C
Relative Humidity                        70 - 86 Percent
Rainfall                                     2.1 mm 
Total rainfall since 1st January          2206.5 mm
Against an average of                     2129.7 mm

Other Stations                Min                  Max
King's Park                  27.6 C               31.9 C
Wong Chuk Hang               27.4 C               31.6 C
Ta Kwu Ling                  24.7 C               32.0 C
Lau Fau Shan                 24.4 C               31.6 C
Tai Po                       25.2 C               31.1 C
Sha Tin                      26.9 C               32.0 C
Tuen Mun                     25.0 C               31.3 C
Tseung Kwan O                27.0 C               32.1 C
Sai Kung                     27.6 C               31.3 C
Cheung Chau                  24.9 C               32.9 C
Chek Lap Kok                 25.7 C               31.8 C
Tsing Yi                     25.4 C               31.9 C
Shek Kong                    24.8 C               32.4 C
Tsuen Wan Ho Koon            24.4 C               30.6 C
Tsuen Wan Shing Mun Valley   24.8 C               32.5 C
Shau Kei Wan                 28.0 C               31.0 C
Kowloon City                 26.9 C               31.8 C
Happy Valley                 28.6 C               33.2 C
Wong Tai Sin                 26.8 C               31.8 C
Stanley                      27.3 C               32.1 C
Kwun Tong                    28.1 C               31.7 C
Sham Shui Po                 26.8 C               32.3 C
Kai Tak Runway Park          28.5 C               31.0 C
Yuen Long Park               24.7 C               33.1 C
Tai Mei Tuk               25.9 C               34.0 C

Duration of sunshine (King's Park):              4.8 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 (17 Sep 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                               0.11
Yuen Ng Fan                         0.12
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                      0.13
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 17 Sep
     2003copy right image | Important notices | Privacy policy Last revision date: <18 Sep 2019> 

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