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Bulletin issued at 01:02 HKT 21/Sep/2016

At 1 a.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 93 per cent.

The air temperatures at other places were:

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

Between 11:45 p.m. and 0:45 a.m., the rainfall recorded in various regions were:

Sai Kung 0 to 22 mm;
Tsuen Wan 0 to 8 mm;
Tai Po 0 to 7 mm;
Kwai Tsing 0 to 5 mm;
Islands District 0 to 5 mm;
Sha Tin 1 to 5 mm;
Tuen Mun 0 to 4 mm;
Yuen Long 0 to 4 mm;
Kowloon City 0 to 4 mm;
Kwun Tong 0 to 3 mm;
Wong Tai Sin 1 to 3 mm;
Sham Shui Po 0 to 3 mm;
Central & Western District 0 to 2 mm;
Yau Tsim Mong 1 to 2 mm;
Eastern District 0 to 1 mm.


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


Climatological Information for 21 Sep

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Bulletin updated at 00:45 HKT 21/Sep/2016

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

The northeast monsoon affected the coastal areas of Guangdong yesterday. Locally, it was mainly cloudy with rain. More than 20 millimetres of rainfall were recorded over parts of the territory yesterday morning, and rainfall even exceeded 40 millimetres over Hong Kong Island. There were bright periods in the afternoon. The northeast monsoon will continue to affect the coast of Guangdong in the next few days. Besides, Malakas weakened from a severe typhoon into a severe tropical storm gradually yesterday, and became an extratropical cyclone last night.

Weather forecast for Hong Kong

Mainly cloudy with a few rain patches in the morning and at night. Sunny periods during the day. Temperatures will range between 25 and 30 degrees. Moderate east to northeasterly winds, fresh offshore.

Outlook : Sunny periods on Thursday. A few rain patches later this week.


(The above forecast period is valid up to 23:59 HKT today, 21/09/2016; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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Marine Weather Information and Forecast

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MARINE FORECAST
Traditional Chinese Simplified Chinese

Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 21:00 HKT 20/Sep/2016

N0 WARNING.

GENERAL SITUATION AT 200900 UTC:
LOW 1006HPA 16N 115W SLOWLY INTST NC.

MARINE FORECAST FOR 24 HOURS FROM 201300 UTC:

HONG KONG= E TO NE 4-5, OCNL 6. RAIN PATCHES. SEA 2 M. TEMP 25-30 C. =
KWANGTUNG= E TO NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. =
TAIWAN STRAIT= NE 6-7. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL NE 2 M. =
BASHI= E TO NE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL NE 2 M. =
PRATAS= E TO NE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL NE 2 M. =
BALINTANG= E TO NE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL NE 2 M. =
SCARBOROUGH= E TO NE 4-5, OCNL 6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M. =
PARACEL= E TO NE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. =
TONKIN= E TO NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. =
DANANG= NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 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 23:30 HKT 20/Sep/2016

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 20 September 2016

    Warnings:
    Strong winds in all areas.

    Weather Situation:
    The northeast monsoon is affecting the coastal waters of Guangdong.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 4 to 5, occasionally force 6.
    A few rain patches.
    Moderate to rough seas.

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

    Outlook for the next 48 hours
    East to northeasterly winds of force 5 to 6. Isolated showers and thunderstorms.

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

    Waglan Island Wind east force 6
      Visibility 11 Kilometres

    Shantou Wind east force 2
      Visibility 19 Kilometres

    Dongsha Wind northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 6

    Macau Wind north force 3
      Visibility 6 Kilometres

    Xisha Wind southeast force 1
      Visibility 30 Kilometres

  • Explanation of Seas or Sea Waves
  • Explanation of Swells
  • Descriptive Terms of Wind Speeds
  • Visibility Readings in Hong Kong Waters
  • Map showing forecast areas
  • Tidal Information

    • WEATHER FORECAST FOR LOCAL AVIATION
    Traditional Chinese Simplified Chinese

    Weather Forecast for Local Aviation

    Bulletin issued at 01:30 HKT 21/SEP/2016
    (Next update at 9:00-9:30 HKT 21/SEP/2016)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON IS AFFECTING THE COASTAL
     AREAS OF GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  060/10
       OFFSHORE:  080/20-25                            24-30
   B.   2000 FT:  080/15-20, OCNL 25                   21
   C.   5000 FT:  070/10                               17
   D.  10000 FT:  080/10                               10
   E.  18000 FT:  350/10                               MS3
   F.  24000 FT:  020/10                               MS13
   G.  30000 FT:  020/10                               MS30
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW RAIN AND MIST PATCHES.
      SUNNY PERIODS DURING THE DAY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT  SCT 3000 FT
   K. VISIBILITY    : 7 KM.  TEMPO 3500 M IN RAIN/MIST
   L. 0 DEG. C LEVEL: 17500 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE. MOD NEAR HILLS.
   N. SEA STATE     : 3.0-4.0 M     SEA TEMPERATURE    : 26 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE EAST TO NORTHEASTERLY WINDS, FRESH
     OFFSHORE.  SUNNY PERIODS. A FEW RAIN PATCHES AT
     NIGHT.=

    ===================================================================
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 23:15 HKT on 20 Sep 16

    VHHK SIGMET 4 VALID 201520/201920 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1642 E11400 - N1912 E11148 - N1930 E11130 - N2030 E11130 - N2106 E11730 - N2100 E11730 TOP FL450 STNR 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.

    The latest report on Tropical Cyclone Meranti broadcast by Ms LAM CHING CHI , Senior Scientific Officer of the Hong Kong Observatory at 6:15 p.m. on 14 Sep 2016.
    Listen Listen

    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 21/Sep/2016 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     29.5 C
Minimum Air Temperature                     22.8 C
Grass Minimum Temperature                   23.2 C
Relative Humidity                        70 - 97 Percent
Rainfall                                    39.6 mm 
Total rainfall since 1st January          2261.4 mm
Against an average of                     2149.7 mm

Other Stations                Min                  Max
King's Park                  22.4 C               29.1 C
Wong Chuk Hang               22.7 C               30.0 C
Ta Kwu Ling                  22.5 C               30.4 C
Lau Fau Shan                 22.2 C               29.0 C
Tai Po                       22.3 C               28.4 C
Sha Tin                      22.7 C               29.7 C
Tuen Mun                     22.4 C               29.2 C
Tseung Kwan O                22.3 C               29.5 C
Sai Kung                     22.9 C               28.9 C
Cheung Chau                  22.1 C               26.4 C
Chek Lap Kok                 23.0 C               29.7 C
Tsing Yi                     22.5 C               30.0 C
Shek Kong                    22.3 C               29.9 C
Tsuen Wan Ho Koon            21.7 C               28.4 C
Tsuen Wan Shing Mun Valley   22.3 C               29.7 C
Hong Kong Park               22.2 C               28.8 C
Shau Kei Wan                 22.5 C               28.3 C
Kowloon City                 22.2 C               30.1 C
Happy Valley                 22.9 C               30.6 C
Wong Tai Sin                 22.5 C               30.2 C
Stanley                      22.4 C               29.7 C
Kwun Tong                    22.5 C               29.5 C
Sham Shui Po                 22.8 C               30.6 C
Kai Tak Runway Park          23.0 C               29.3 C
Yuen Long Park               22.7 C               30.7 C

Duration of sunshine (King's Park):              3.6 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 8.
 

Yesterday's (20 Sep 2016) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.09 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                           0.09
Tap Mun                             0.10
Kat O                               0.10
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.14
Sha Tau Kok                         0.11
Kwun Tong                           0.13
Sai Wan Ho                          0.10
King's Park                         0.15
Tsim Bei Tsui                       0.14
Cape D'Aguilar                      0.14
Chek Lap Kok                        0.15

Note

      

    1. From readings taken at various locations in Hong Kong during
the period 1987-2015, the background ambient gamma radiation
levels may vary between 0.06 and 0.30 microsievert per hour.

    2. The extent of health effects to a person as a result of
exposure to radiation is expressed by a physical quantity
called equivalent dose, in unit of sievert.  Protective
action may be required if there is an increase in the
ambient gamma dose rate above background such that the total
additional dose is expected to exceed 5000 microsieverts in
a relatively short period of time. For example, a dose of
5000 microsieverts may be reached when the ambient gamma
dose rate is 1000 microsieverts per hour (several thousand
times above background) and lasts for 5 hours.

    3. The readings of ambient gamma radiation level from
instrument are expressed in unit of gray, which is
numerically equal to the gamma dose expressed in sievert.
    Climatological Information for 20 Sep
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