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Bulletin issued at 04:02 HKT 07/May/2017

At 4 a.m. at the Hong Kong Observatory the air temperature was 25 degrees Celsius and the relative humidity 94 per cent.

The air temperatures at other places were:

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


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


Climatological Information for 7 May

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


Local Weather Forecast
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Local Weather Forecast

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

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Bulletin updated at 03:45 HKT 07/May/2017

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

An easterly airstream is affecting the coastal areas of Guangdong.

Weather forecast for today

Mainly cloudy. Misty with one or two showers at first. Sunny intervals during the day. Temperatures will range between 25 and 28 degrees. Moderate easterly winds, occasionally fresh.

Outlook : Sunny intervals and a few showers in the following couple of days.


(The above forecast period is valid up to 23:59 HKT today, 07/05/2017; 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 06/May/2017

N0 WARNING.

GENERAL SITUATION AT 060900 UTC:
AN EASTERLY AIRSTREAM IS EXPECTED TO AFFECT THE FORECAST AREAS LATER.

MARINE FORECAST FOR 24 HOURS FROM 061300 UTC:

HONG KONG= E 4-5. DOWN TO 2000 M IN MIST PATCHES. ISOL SHOWERS AND TS. SEA UP TO 2 M. TEMP 24-28 C. =
KWANGTUNG= E 4-5. DOWN TO 2000 M IN MIST PATCHES. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
TAIWAN STRAIT= NE 5-6. DOWN TO 4000 M IN MIST PATCHES. ISOL SHOWERS AND TS. SEA 2-3 M. SWELL NE UP TO 2 M. =
BASHI= E 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
PRATAS= E 4-5. ISOL SHOWERS. SEA UP TO 2 M. =
BALINTANG= E 4-5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
SCARBOROUGH= E TO NE 4, OCNL 5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
PARACEL= E 4, UP TO 5 LATER. ISOL SHOWERS AND TS. SEA UP TO 2 M LATER. =
TONKIN= E TO SE 4, OCNL 5. ISOL SHOWERS AND TS. SEA UP TO 2 M. =
DANANG= E TO SE 4, OCNL 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.


  • 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 03:30 HKT 07/May/2017

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 3:30 a.m. on 07 May 2017

    Warnings:
    Strong winds in Nan'ao and Shanwei.

    Weather Situation:
    An easterly airstream is affecting the coastal waters of Guangdong.

    Area forecasts for the next 24 hours

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

    Nan'ao and Shanwei:
    East force 4 to 5, occasionally force 6.
    Isolated showers and thunderstorms.
    Moderate to rough seas.

    South of Hong Kong and Shangchuan Dao:
    East force 4 to 5.
    Isolated showers and thunderstorms.
    Moderate seas.

    Outlook for the next 48 hours
    Easterly winds of force 4 to 5, becoming southerly winds of force 4 to 5.

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

    Waglan Island Wind east force 4
      Visibility 5000 Metres

    Shantou Wind east force 2
      Visibility 24 Kilometres

    Huangmaozhou Wind east-southeast force 3

    Macau Wind southeast force 2
      Visibility 3800 Metres in mist

    Xisha Wind east-northeast force 1
      Visibility 25 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 07/MAY/2017
    (Next update at 9:00-9:30 HKT 07/MAY/2017)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     ISOL CUNIM/TS AND ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE COASTAL
     AREAS OF GUANGDONG GRADUALLY.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 0200 TO 1200 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  110/10
                  TEMPO VRB/15G25 IN TS
       OFFSHORE:  090/15-20                            27-24
   B.   2000 FT:  100/10-15                            23
   C.   5000 FT:  100/10                               19
   D.  10000 FT:  280/10                               9
   E.  18000 FT:  260/15                               MS3
   F.  24000 FT:  260/35                               MS14
   G.  30000 FT:  260/30                               MS25
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      NIL
   I. WEATHER       : 
      MAINLY CLOUDY WITH A FEW SHOWERS. A FEW
      ISOLATED THUNDERSTORMS MAINLY TO THE NORTH.
      LOCALISED MIST/HAZE. SUNNY INTERVALS DURING THE
      DAY.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 2000 FT SCT 3500 FT TEMPO FEW CB 800 FT SCT
      2000 FT BKN 4000 FT
   K. VISIBILITY    : 7 KM.  TEMPO 4000 M IN SHOWERS.   TEMPO 2500 M IN MIST/HAZE/TS.
   L. 0 DEG. C LEVEL: 16500 FT      10 DEG. C LEVEL(S) : 9600 FT
   M. TURBULENCE    : MOD TO SEV NEAR CUNIM/TS
   N. SEA STATE     : 1.0-1.5 M     SEA TEMPERATURE    : 25 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EASTERLY WINDS.  SUNNY
     INTERVALS AND 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 07:15 HKT on 06 May 17

    VHHK SIGMET 4 VALID 052110/060110 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1918 E11142 - N1930 E11130 - N2100 E11130 - N2106 E11254 - N1948 E11300 - N1918 E11142 TOP FL380 MOV E 05KT NC= VHHK SIGMET 5 VALID 052315/060315 VHHH- VHHK HONG KONG FIR EMBD TS FCST WI N1912 E11142 - N1930 E11130 - N2124 E11130 - N2212 E11306 - N1948 E11318 - N1912 E11142 TOP FL380 MOV NE 05KT 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 07/May/2017 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     31.1 C
Minimum Air Temperature                     25.3 C
Grass Minimum Temperature                   24.2 C
Relative Humidity                        62 - 89 Percent
Rainfall                                      Trace 
Total rainfall since 1st January           177.0 mm
Against an average of                      389.8 mm

Other Stations                Min                  Max
King's Park                  24.9 C               31.3 C
Wong Chuk Hang               23.4 C               29.7 C
Ta Kwu Ling                  23.1 C               32.9 C
Lau Fau Shan                 24.3 C               32.0 C
Tai Po                       23.8 C               30.0 C
Sha Tin                      23.8 C               31.5 C
Tuen Mun                     24.1 C               31.6 C
Tseung Kwan O                23.3 C               32.0 C
Sai Kung                     24.2 C               31.3 C
Cheung Chau                  24.0 C               29.2 C
Chek Lap Kok                 25.3 C               31.4 C
Tsing Yi                     24.3 C               32.1 C
Shek Kong                    23.5 C               32.1 C
Tsuen Wan Ho Koon            22.9 C               29.7 C
Tsuen Wan Shing Mun Valley   23.4 C               31.2 C
Hong Kong Park               24.2 C               31.8 C
Shau Kei Wan                 24.8 C               30.3 C
Kowloon City                 24.6 C               31.4 C
Happy Valley                 24.3 C               31.9 C
Wong Tai Sin                 24.4 C               31.4 C
Stanley                      24.3 C               30.0 C
Kwun Tong                    25.3 C               31.4 C
Sham Shui Po                 24.6 C               32.1 C
Kai Tak Runway Park          25.3 C               30.5 C
Yuen Long Park               23.9 C               32.7 C
Tai Mei Tuk               24.1 C               31.9 C

Duration of sunshine (King's Park):              7.1 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 6.
 

Yesterday's (06 May 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 06 May
     2003copy right image | Important notices | Privacy policy Last revision date: <07 May 2017> 

    From Weather Underground