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Bulletin issued at 00:02 HKT 27/Apr/2017

At midnight at the Hong Kong Observatory the air temperature was 24 degrees Celsius and the relative humidity 97 per cent.

The air temperatures at other places were:

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


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


Climatological Information for 27 Apr

Regional Weather in Hong Kong

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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 00:00 HKT 27/Apr/2017

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

A trough of low pressure brought unsettled weather to Guangdong yesterday. Locally, it was mainly cloudy with a few showers and coastal fog. The visibility at Waglan Island once fell below 1000 metres. The trough of low pressure will continue to bring showers and thunderstorms to southern China today. Under the influence of a relatively dry northeast monsoon, the weather will improve over the region in the following couple of days.

Beside, the tropical depression over the seas east of the Philippines was named Muifa yesterday morning. At 11 p.m. last night, Muifa was centred about 590 kilometres northwest of Yap. It is forecast to move north-northwest at about 14 kilometres per hour across the western North Pacific to the east of the Philippines.

Weather forecast for Hong Kong (Thursday, 27 Apr 2017)

Cloudy with a few showers. Showers will be more frequent with thunderstorms and rather low visibility at first. Temperatures will range between 20 and 24 degrees. Light winds, becoming moderate northeasterly winds, fresh at times.

Outlook : The weather will improve in the following 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 21:00 HKT 26/Apr/2017

N0 WARNING.

GENERAL SITUATION AT 260900 UTC:
TROUGH 22N 108E 24N 115E 25N 120E S 10KT

MARINE FORECAST FOR 24 HOURS FROM 261300 UTC:

HONG KONG= SE 4-5, BEC NE 4-5. DOWN TO 1000 M IN MIST PATCHES. ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. TEMP 20-23 C. =
KWANGTUNG= S TO SE 4-5, BEC NE 6-7. DOWN TO 1000 M IN MIST PATCHES. ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M, BEC 3-4 M. =
TAIWAN STRAIT= NE 6-7. DOWN TO 1000 M IN MIST PATCHES. ISOL SHOWERS AND TS. SEA 3-4 M. =
BASHI= W TO NW 4-5, NE 6-7 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M, 3-4 M LATER. =
PRATAS= S TO SW 4-5, NE 6-7 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M, 3-4 M LATER. =
BALINTANG= W TO NW 4-5, NE 5-6 LATER. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2 M, UP TO 3 M LATER. =
SCARBOROUGH= N TO NW 4-5. FINE. SEA UP TO 2 M. =
PARACEL= S 4-5, BEC NE 4-5. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS IN N. SEA UP TO 2 M. =
TONKIN= S 4-5, BEC NE 4-5. DOWN TO 1000 M IN MIST PATCHES. ISOL SQUALLY SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= S 4-5, BEC NE 4-5. DOWN TO 1000 M IN MIST PATCHES. ISOL SQUALLY 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.


  • 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 26/Apr/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:30 p.m. on 26 April 2017

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

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    Southeast force 4 to 5, becoming northeast force 4 to 5.
    Isolated squally showers and thunderstorms. Rather low visibility at first.
    Moderate seas.

    Nan'ao and Shanwei:
    Southeast force 4 to 5, becoming northeast force 6 to 7.
    Isolated squally showers and thunderstorms.
    Moderate seas, becoming rough seas.

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

    Shangchuan Dao:
    South force 4 to 5, becoming northeast force 5 to 6.
    Isolated squally showers and thunderstorms.
    Moderate seas, becoming rough seas.

    Outlook for the next 48 hours
    Northeasterly winds of force 5 to 6, occasionally force 7 at first. Isolated showers and thunderstorms at first.

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

    Waglan Island Wind northeast force 2
      Visibility 210 Metres

    Shantou Wind south-southwest force 1
      Visibility 9 Kilometres in showers

    Dongsha Wind west-southwest force 1
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 3

    Macau Wind south-southeast force 1
      Visibility 1100 Metres in mist

    Xisha Wind south-southwest 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 17:30 HKT 26/APR/2017
    (Next update at 01:30 HKT 27/APR/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     A TROUGH OF LOW PRESSURE OVER INLAND GUANGDONG
     IS MOVING SOUTHWARDS GRADUALLY. THE BAND OF
     THUNDERY SHOWERS ASSOCIATED WITH IT WILL AFFECT
     THE COASTAL AREAS OF GUANGDONG.
     
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  150/5-10
                  BECMG 360/10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  140/10-15 OCNL 20
                  BECMG 360/10-15                      25-20
   B.   2000 FT:  200/10-15 OCNL 20                    20
   C.   5000 FT:  260/15                               17
   D.  10000 FT:  260/20                               9
   E.  18000 FT:  260/25                               MS7
   F.  24000 FT:  270/35                               MS15
   G.  30000 FT:  270/40                               MS30
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL.
   I. WEATHER       : 
      CLOUDY WITH A FEW SHOWERS. SHOWERS WILL BE MORE
      FREQUENT OVERNIGHT.  A FEW ISOLATED SQUALLY
      THUNDERSTORMS.  LOCALIZED MIST.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1200 FT  SCT 2500 FT  BKN 10000 FT.  TEMPO
      FEW CB 1000 FT  SCT 2000 FT  BKN 4000 FT.
   K. VISIBILITY    : 6 KM.  TEMPO 1500 M IN TS/SHOWERS/MIST.
   L. 0 DEG. C LEVEL: 15500 FT      10 DEG. C LEVEL(S) : 9600 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS. MOD OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 1.0-2.5 M     SEA TEMPERATURE    : 22 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTHEASTERLY WINDS.  CLOUDY
     WITH A FEW SHOWERS AND ISOLATED THUNDERSTORMS.
     LOCALIZED MIST.=

    ===================================================================
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
    Traditional Chinese Simplified Chinese

    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 18:30 HKT on 26 Apr 17

    VHHK SIGMET 3 VALID 260630/261030 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1748 E11300 - N1854 E11200 - N2136 E11148 - N2224 E11336 - N2312 E11606 - N2124 E11600 - N1748 E11300 TOP FL380 MOV E 10KT NC= VHHK SIGMET 4 VALID 261030/261430 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1848 E11206 - N1930 E11130 - N2124 E11130 - N2230 E11342 - N2318 E11618 - N2124 E11648 - N1848 E11206 TOP FL360 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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