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Bulletin issued at 10:02 HKT 27/Apr/2017

At 10 a.m. at the Hong Kong Observatory the air temperature was 22 degrees Celsius and the relative humidity 96 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.7. The intensity of UV radiation was low.

The air temperatures at other places were:

King's Park 22 degrees;
Wong Chuk Hang 22 degrees;
Ta Kwu Ling 21 degrees;
Lau Fau Shan 23 degrees;
Tai Po 21 degrees;
Sha Tin 21 degrees;
Tuen Mun 23 degrees;
Tseung Kwan O 21 degrees;
Sai Kung 21 degrees;
Cheung Chau 22 degrees;
Chek Lap Kok 23 degrees;
Tsing Yi 22 degrees;
Shek Kong 21 degrees;
Tsuen Wan Ho Koon 21 degrees;
Tsuen Wan Shing Mun Valley 22 degrees;
Hong Kong Park 23 degrees;
Shau Kei Wan 21 degrees;
Kowloon City 21 degrees;
Happy Valley 23 degrees;
Wong Tai Sin 22 degrees;
Stanley 21 degrees;
Kwun Tong 21 degrees;
Sham Shui Po 21 degrees;
Kai Tak Runway Park 22 degrees;
Yuen Long Park 23 degrees;
Tai Mei Tuk 20 degrees.

Between 8:45 and 9:45 a.m., the rainfall recorded in various regions were:

Eastern District 1 to 13 mm;
Southern District 8 to 13 mm;
Kwun Tong 10 to 12 mm;
Sai Kung 0 to 10 mm;
Wong Tai Sin 2 to 9 mm;
Central & Western District 4 to 9 mm;
Wan Chai 4 to 8 mm;
Islands District 0 to 8 mm;
Tai Po 0 to 6 mm;
Yau Tsim Mong 1 to 5 mm;
Sham Shui Po 0 to 5 mm;
Sha Tin 1 to 4 mm;
Kwai Tsing 0 to 2 mm;
Yuen Long 0 to 2 mm;
Tsuen Wan 0 to 2 mm;
North District 0 to 1 mm.


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


Climatological Information for 27 Apr

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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

Current Weather | Regional Temperature Forecast in HK |  9-day Weather Forecast
UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 09:45 HKT 27/Apr/2017

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

A trough of low pressure is bringing showers to the coast of Guangdong and the northern part of the South China Sea. Locally, around 10 millimetres of rainfall were recorded in the urban areas and Lantau Island this morning.

At 10 a.m., Tropical Depression Muifa was centred about 700 kilometres north-northwest of Yap. It is forecast to move north-northeast at about 14 kilometres per hour across the western North Pacific to the east of the Philippines.

Weather forecast for today

Mainly cloudy with a few showers. Coastal mist at first. Moderate to fresh northeasterly winds.

Outlook : The weather will improve in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 27/04/2017; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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MARINE FORECAST
Traditional Chinese Simplified Chinese

Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 27/Apr/2017

N0 WARNING.

GENERAL SITUATION AT 262100 UTC:
TROUGH 19N 110E 21N 115E 22N 119E S SLOWLY

MARINE FORECAST FOR 24 HOURS FROM 270100 UTC:

HONG KONG= NE 4-5. DOWN TO 500 M IN FOG PATCHES AT FIRST. ISOL SHOWERS. SEA UP TO 2 M. SWELL NE UP TO 2 M. TEMP 24-19 C. =
KWANGTUNG= NE 6-7. DOWN TO 1000 M IN MIST PATCHES AT FIRST. ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 2 M. =
TAIWAN STRAIT= NE 6-7. DOWN TO 2000 M IN MIST PATCHES AT FIRST. ISOL SHOWERS AND TS. SEA 3-4 M. SWELL NE 2-3 M. =
BASHI= NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 2-3 M. =
PRATAS= NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 2 M. =
BALINTANG= NE 6-7. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 3-4 M. SWELL NE 2-3 M. =
SCARBOROUGH= N TO NE 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL NE 2 M. =
PARACEL= NE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS IN N. SEA 2-3 M. SWELL NE 2 M. =
TONKIN= NE 4-5, OCNL 6. DOWN TO 2000 M IN MIST PATCHES AT FIRST. ISOL SQUALLY SHOWERS AND TS. SEA 2 M. =
DANANG= NE 4-5. DOWN TO 2000 M IN MIST PATCHES AT FIRST. ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. SWELL NE 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.


  • 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 09:30 HKT 27/Apr/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 27 April 2017

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

    Weather Situation:
    The thundery showers associated with a trough of low pressure is affecting the south China coastal waters.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Northeast force 4 to 5.
    A few showers. Mist patches at first.
    Moderate to rough seas.

    Nan'ao and Shanwei:
    Northeast force 6 to 7.
    Isolated squally showers and thunderstorms.
    Rough seas.

    South of Hong Kong and Shangchuan Dao:
    Northeast force 5 to 6.
    Isolated squally showers and thunderstorms.
    Moderate to rough seas.

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

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

    Waglan Island Wind east-northeast force 6
      Visibility 2700 Metres

    Shantou Wind east-northeast force 2
      Visibility 13 Kilometres in showers

    Dongsha Wind east-northeast force 1
      Visibility 10 Kilometres

    Huangmaozhou Wind northwest force 5

    Macau Wind north-northwest force 2
      Visibility 1500 Metres

    Xisha Wind south force 2
      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 09:30 HKT 27/APR/2017
    (Next update at 17:30 HKT 27/APR/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     NIL
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A TROUGH OF LOW PRESSURE IS BRINGING 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 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  360/10-15
       OFFSHORE:  030/15-20                            22-25
   B.   2000 FT:  330/15-20                            17
   C.   5000 FT:  270/10                               13
   D.  10000 FT:  270/20                               8
   E.  18000 FT:  270/30                               MS6
   F.  24000 FT:  280/40                               MS14
   G.  30000 FT:  290/45                               MS29
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS. LOCALIZED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1500 FT  SCT 2500 FT  BKN 6000 FT.
   K. VISIBILITY    : 6 KM.  TEMPO 3500 M IN SHOWERS. 
                      TEMPO 2000 M  IN MIST.
   L. 0 DEG. C LEVEL: 15000 FT      10 DEG. C LEVEL(S) : 9400 FT
   M. TURBULENCE    : MOD
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 23 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTH TO NORTHEASTERLY WINDS. 
     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 10:25 HKT on 27 Apr 17

    VHHK SIGMET 1 VALID 270225/270625 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2300 E11530 - N2342 E11730 - N2130 E11730 - N1942 E11606 - N1942 E11412 - N2118 E11530 - N2300 E11530 TOP FL380 MOV E 10KT NC= VHHK SIGMET 7 VALID 262225/270225 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2230 E11354 - N2324 E11642 - N1954 E11548 - N1954 E11300 - N2230 E11354 TOP FL380 MOV E 10KT 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 27/Apr/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     26.8 C
Minimum Air Temperature                     22.4 C
Grass Minimum Temperature                   22.2 C
Relative Humidity                        87 - 97 Percent
Rainfall                                     2.9 mm 
Total rainfall since 1st January           131.0 mm
Against an average of                      313.1 mm

Other Stations                Min                  Max
King's Park                  22.2 C               27.4 C
Wong Chuk Hang               22.0 C               26.9 C
Ta Kwu Ling                  22.1 C               27.5 C
Lau Fau Shan                 21.7 C               28.9 C
Tai Po                       22.0 C               25.2 C
Sha Tin                      22.5 C               27.3 C
Tuen Mun                     22.8 C               26.9 C
Tseung Kwan O                21.7 C               25.3 C
Sai Kung                     22.2 C               24.9 C
Cheung Chau                  22.1 C               26.0 C
Chek Lap Kok                 23.2 C               28.9 C
Tsing Yi                     22.7 C               28.9 C
Shek Kong                    21.9 C               29.4 C
Tsuen Wan Ho Koon            21.8 C               25.8 C
Tsuen Wan Shing Mun Valley   22.5 C               27.9 C
Hong Kong Park               22.2 C               26.9 C
Shau Kei Wan                 21.7 C               25.0 C
Kowloon City                 22.0 C               27.7 C
Happy Valley                 22.3 C               28.3 C
Wong Tai Sin                 22.2 C               27.6 C
Stanley                      22.0 C               26.2 C
Kwun Tong                    22.2 C               27.1 C
Sham Shui Po                 22.9 C               28.5 C
Kai Tak Runway Park          22.6 C               25.6 C
Yuen Long Park               21.7 C               29.1 C
Tai Mei Tuk               21.9 C               26.1 C

Duration of sunshine (King's Park):              1.0 H
The mean UV index recorded at King's Park yesterday was 2,
the UV intensity was Low.
The maximum UV index for yesterday was 9.
 

Yesterday's (26 Apr 2017) 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                           0.08
Tap Mun                             0.09
Kat O                               0.09
Yuen Ng Fan                         0.12
Tai Mei Tuk                         0.12
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 during
the period 1987-2016, 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 26 Apr
     2003copy right image | Important notices | Privacy policy Last revision date: <27 Apr 2017> 

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