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

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Bulletin issued at 11:11 HKT 22/Apr/2017

At 11 a.m. at the Hong Kong Observatory the air temperature was 21 degrees Celsius and the relative humidity 64 per cent.
During the past hour the mean UV Index recorded at King's Park was 2. The intensity of UV radiation was low.

Please be reminded that:

The Thunderstorm Warning was issued at 11:10 a.m. It will remain effective until 12:15 p.m. today. Isolated thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

King's Park 21 degrees;
Wong Chuk Hang 21 degrees;
Ta Kwu Ling 19 degrees;
Lau Fau Shan 17 degrees;
Tai Po 19 degrees;
Sha Tin 20 degrees;
Tuen Mun 20 degrees;
Tseung Kwan O 21 degrees;
Sai Kung 20 degrees;
Cheung Chau 20 degrees;
Chek Lap Kok 21 degrees;
Tsing Yi 22 degrees;
Shek Kong 19 degrees;
Tsuen Wan Ho Koon 20 degrees;
Tsuen Wan Shing Mun Valley 21 degrees;
Hong Kong Park 22 degrees;
Shau Kei Wan 23 degrees;
Kowloon City 21 degrees;
Happy Valley 22 degrees;
Wong Tai Sin 21 degrees;
Stanley 22 degrees;
Kwun Tong 21 degrees;
Sham Shui Po 21 degrees;
Kai Tak Runway Park 22 degrees;
Yuen Long Park 19 degrees;
Tai Mei Tuk 19 degrees.

Between 9:45 and 10:45 a.m., the rainfall recorded in various regions were:

Yuen Long 0 to 4 mm.


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


Climatological Information for 22 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

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UV Index Forecast |  Weather Information for South China Coastal Waters

Bulletin updated at 11:10 HKT 22/Apr/2017

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

The northeast monsoon is bringing cooler weather to the coastal areas of Guangdong. Locally, temperatures over the territory this morning were generally six to seven degrees lower than those of yesterday.

Weather forecast for today

Mainly cloudy. One or two showers and isolated thunderstorms at first. Bright periods during the day. Moderate to fresh north to northeasterly winds.

Outlook : Mainly cloudy in the next couple of days.


(The above forecast period is valid up to 23:59 HKT today, 22/04/2017; 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 22/Apr/2017

N0 WARNING.

GENERAL SITUATION AT 212100 UTC:
COLD FRONT 19N 108E 20N 113E 21N 117E S 10KT.

MARINE FORECAST FOR 24 HOURS FROM 220100 UTC:

HONG KONG= N TO NE 5-6. ISOL SHOWERS. SEA 2-3 M. TEMP 25-20 C. =
KWANGTUNG= N TO NE 5-6, OCNL 7. ISOL SHOWERS. SEA UP TO 4 M. SWELL NE UP TO 2 M. =
TAIWAN STRAIT= NE 6-7. ISOL SHOWERS. SEA 3-4 M. SWELL NE UP TO 3 M. =
BASHI= W TO NW 5-6 , BEC NE 6-7. ISOL SHOWERS AND TS. SEA 2-3 M, 3-4 M LATER. SWELL NE UP TO 2 M. =
PRATAS= NE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. SWELL NE UP TO 2 M. =
BALINTANG= SW 5-6 , BEC NE 6. ISOL SHOWERS. SEA 2-3 M. SWELL NE UP TO 2 M. =
SCARBOROUGH= SW 4-5, BEC NE 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= NE 5-6. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M. =
TONKIN= N TO NE 5-6, UP TO 7 AT FIRST. ISOL SHOWERS AND TS. SEA 2-3 M, UP TO 4 M AT FIRST. =
DANANG= N TO NE 5-6, UP TO 7 AT FIRST. DOWN TO 4000 M IN ISOL SQUALLY SHOWERS AND TS. SEA 2-3 M, UP TO 4 M AT FIRST. =
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 11:20 HKT 22/Apr/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 11:20 a.m. on 22 April 2017

    Warnings:
    Strong winds in all areas.

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

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    North to northeast force 5 to 6.
    Isolated showers and thunderstorms.
    Moderate to rough seas.

    Nan'ao and Shanwei:
    North to northeast force 5 to 6, occasionally force 7.
    Isolated showers and thunderstorms.
    Moderate to rough seas.

    South of Hong Kong and Shangchuan Dao:
    North 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, becoming southeasterly winds of force 4 to 5 later.

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

    Waglan Island Wind north-northeast force 4
      Visibility 20 Kilometres

    Shantou Wind east-southeast force 2
      Visibility 5000 Metres in showers

    Dongsha Wind north-northeast force 3
      Visibility 10 Kilometres

    Huangmaozhou Wind north-northeast force 4

    Macau Wind north force 3
      Visibility 8 Kilometres in rain

    Xisha Wind west-southwest force 2
      Visibility 14 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 11:30 HKT 22/APR/2017
    (Next update at 17:30 HKT 22/APR/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS. 
     STRONG WINDS AND SEV TURB OFFSHORE.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  020/10-15
                  TEMPO VRB/20G25 IN TS
       OFFSHORE:  020/20-25                            19-25
   B.   2000 FT:  030/15-20                            17
   C.   5000 FT:  300/10-15                            16
   D.  10000 FT:  270/30                               9
   E.  18000 FT:  260/45                               MS6
   F.  24000 FT:  260/55                               MS17
   G.  30000 FT:  260/65                               MS30
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      1600-2300 FT.
      
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS. 
      ISOLATED THUNDERSTORMS AT FIRST
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT  SCT 4000 FT.
      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: 14500 FT      10 DEG. C LEVEL(S) : 9200 FT
   M. TURBULENCE    : MOD TO SEV
   N. SEA STATE     : 2.0-2.5 M     SEA TEMPERATURE    : 23 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO OCCASIONALLY FRESH NORTHEASTERLY 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
    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 09:10 HKT on 22 Apr 17

    VHHK SIGMET 1 VALID 220110/220510 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2030 E11706 - N1906 E11600 - N1800 E11248 - N1900 E11200 - N2030 E11400 - N2030 E11706 TOP FL400 MOV ESE 10KT NC= VHHK SIGMET 8 VALID 212110/220110 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N2100 E11730 - N1900 E11548 - N1806 E11242 - N1854 E11200 - N1954 E11200 - N2130 E11730 - N2100 E11730 TOP FL380 MOV ESE 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 22/Apr/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     29.4 C
Minimum Air Temperature                     22.8 C
Grass Minimum Temperature                   23.2 C
Relative Humidity                        79 - 94 Percent
Rainfall                                     7.8 mm 
Total rainfall since 1st January           109.2 mm
Against an average of                      283.2 mm

Other Stations                Min                  Max
King's Park                  22.9 C               29.3 C
Wong Chuk Hang               22.1 C               26.8 C
Ta Kwu Ling                  22.1 C               30.4 C
Lau Fau Shan                 22.6 C               29.2 C
Tai Po                       22.9 C               29.8 C
Sha Tin                      23.2 C               29.9 C
Tuen Mun                     23.1 C               28.9 C
Tseung Kwan O                21.6 C               28.3 C
Sai Kung                     22.6 C               29.2 C
Cheung Chau                  22.0 C               29.1 C
Chek Lap Kok                 22.4 C               30.7 C
Tsing Yi                     22.7 C               28.0 C
Shek Kong                    22.9 C               29.7 C
Tsuen Wan Ho Koon            22.4 C               26.0 C
Tsuen Wan Shing Mun Valley   22.8 C               27.8 C
Hong Kong Park               22.6 C               28.0 C
Shau Kei Wan                 22.1 C               28.9 C
Kowloon City                 22.4 C               28.7 C
Happy Valley                 23.2 C               27.9 C
Wong Tai Sin                 22.7 C               28.3 C
Stanley                      22.3 C               28.8 C
Kwun Tong                    22.9 C               28.8 C
Sham Shui Po                 22.3 C               30.5 C
Kai Tak Runway Park          22.8 C               29.1 C
Yuen Long Park               23.2 C               30.3 C
Tai Mei Tuk               21.6 C               29.0 C

Duration of sunshine (King's Park):              0.6 H
The mean UV index recorded at King's Park yesterday was 1,
the UV intensity was Low.
The maximum UV index for yesterday was 6.
 

Yesterday's (21 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 21 Apr
     2003copy right image | Important notices | Privacy policy Last revision date: <22 Apr 2017> 

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