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Bulletin issued at 10:02 HKT 15/Apr/2018

At 10 a.m. at the Hong Kong Observatory the air temperature was 21 degrees Celsius and the relative humidity 86 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.1. The intensity of UV radiation was low.

Gusts reaching 70 kilometres per hour or above may affect Hong Kong.

Please be reminded that:

The Thunderstorm Warning has been issued. It will remain effective until 1:00 p.m. today. Squally thunderstorms are expected to occur over Hong Kong.

The air temperatures at other places were:

King's Park 22 degrees;
Wong Chuk Hang 22 degrees;
Ta Kwu Ling 20 degrees;
Lau Fau Shan 18 degrees;
Tai Po 20 degrees;
Sha Tin 20 degrees;
Tuen Mun 19 degrees;
Tseung Kwan O 22 degrees;
Sai Kung 21 degrees;
Cheung Chau 20 degrees;
Chek Lap Kok 19 degrees;
Tsing Yi 21 degrees;
Shek Kong 20 degrees;
Tsuen Wan Ho Koon 19 degrees;
Tsuen Wan Shing Mun Valley 21 degrees;
Hong Kong Park 21 degrees;
Shau Kei Wan 22 degrees;
Kowloon City 20 degrees;
Happy Valley 22 degrees;
Wong Tai Sin 20 degrees;
Stanley 22 degrees;
Kwun Tong 22 degrees;
Sham Shui Po 21 degrees;
Kai Tak Runway Park 22 degrees;
Yuen Long Park 20 degrees;
Tai Mei Tuk 21 degrees.

Between 8:45 and 9:45 a.m., lightning was detected within Lantau, New Territories East and New Territories West. The rainfall recorded in various regions were:

Islands District 0 to 1 mm;
Yuen Long 0 to 1 mm.


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


Climatological Information for 15 Apr

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 10:00 HKT 15/Apr/2018

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

A band of thundery showers associated with an upper-air disturbance is affecting the coast of Guangdong. Meanwhile, the northeast monsoon is bringing cooler weather to the region.

Weather forecast for today

Cloudy with occasional rain and squally thunderstorms. Moderate northerly winds, fresh at times.

Outlook : Cooler with showers and a few thunderstorms in the next couple of days. It will be brighter midweek this week.


(The above forecast period is valid up to 23:59 HKT today, 15/04/2018; Regular update at : around 45 minutes past each hour, 16:15 HKT and 23:15 HKT)

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MARINE FORECAST
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Marine Forecast

Weather Information for the Marine Community

Bulletin issued at 09:00 HKT 15/Apr/2018

N0 WARNING.

GENERAL SITUATION AT 142100 UTC:
A NORTHEAST MONSOON IS GENERALLY AFFECTING THE FORECAST AREAS.

MARINE FORECAST FOR 24 HOURS FROM 150100 UTC:

HONG KONG= N 4, OCNL 5. A FEW SHOWERS AND TS. SEA UP TO 2 M LATER. TEMP 23-20 C. =
KWANGTUNG= N TO NE 5-6. 2000 M IN SCT SHOWERS AND SQUALLY TS. SEA 2-3 M. SWELL NE 2 M IN E. =
TAIWAN STRAIT= N TO NE 6-7. 4000 M IN ISOL SHOWERS AND SQUALLY TS. SEA 3-4 M. SWELL NE 2 M. =
BASHI= N TO NE 6-7, E TO SE 4-5 IN E AT FIRST. 4000 M IN ISOL SHOWERS AND SQUALLY TS. SEA 3-4 M. SWELL NE 2 M. =
PRATAS= N TO NE 5-6. 4000 M IN ISOL SHOWERS AND SQUALLY TS. SEA 2-3 M. SWELL NE 2 M. =
BALINTANG= E TO NE 5-6. ISOL SHOWERS. SEA 2-3 M. SWELL NE 2 M. =
SCARBOROUGH= NE 4-5. FINE. SEA UP TO 2 M. =
PARACEL= NE 5-6. ISOL SHOWERS AND TS IN N. SEA 2-3 M. =
TONKIN= N TO NE 5-6. ISOL SHOWERS AND TS. SEA 2-3 M. =
DANANG= N TO NE 4-5. ISOL SHOWERS AND TS IN N. 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 09:30 HKT 15/Apr/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 9:30 a.m. on 15 April 2018

    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.
    Scattered showers and squally thunderstorms.
    Moderate to rough seas.

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

    Shanwei, South of Hong Kong and Shangchuan Dao:
    North to northeast force 5 to 6.
    Scattered showers and squally thunderstorms.
    Moderate to rough seas.

    Outlook for the next 48 hours
    East to northeasterly winds of force 5 to 6. Scattered showers and squally thunderstorms at first.

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

    Waglan Island Wind north force 3
      Visibility 40 Kilometres

    Shantou Wind northeast force 1
      Visibility 30 Kilometres

    Huangmaozhou Wind north-northwest force 6

    Macau Wind north-northwest force 3
      Visibility 9 Kilometres

    Xisha Wind east force 1
      Visibility 19 Kilometres

  • Explanation of Seas or Sea Waves
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    • WEATHER FORECAST FOR LOCAL AVIATION
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    Weather Forecast for Local Aviation

    Bulletin issued at 09:30 HKT 15/APR/2018
    (Next update at 12:30 HKT 15/APR/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB.  CUNIM/TS AND
     ASSOCIATED HAZARDS.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     THE NORTHEAST MONSOON IS AFFECTING THE SOUTH
     CHINA COASTAL WATERS. A BAND OF THUNDERY SHOWERS
     ASSOCIATED WITH AN UPPER-AIR DISTURBANCE IS
     AFFECTING THE COAST OF GUANGDONG.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1000 TO 2000 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  360/10-15
                  TEMPO VRB/20G30 IN TS
       OFFSHORE:  360/15-20, OCNL 25                   18-22
   B.   2000 FT:  020/15-20, OCNL 25                   18
   C.   5000 FT:  280/10                               17
   D.  10000 FT:  260/20                               10
   E.  18000 FT:  270/30                               MS6
   F.  24000 FT:  260/40                               MS16
   G.  30000 FT:  260/50                               MS28
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      4600-5000 FT.
   I. WEATHER       : 
      CLOUDY WITH SHOWERS AND A FEW THUNDERSTORMS.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT SCT 2500 FT. 
      TEMPO FEW CB 800 FT  SCT 2000 FT BKN 5000 FT.
   K. VISIBILITY    : 7 KM. TEMPO 3000 M IN SHOWERS. TEMPO 2000 M IN TS.
   L. 0 DEG. C LEVEL: 15000 FT      10 DEG. C LEVEL(S) : 10000 FT
   M. TURBULENCE    : MOD TO SEV.
   N. SEA STATE     : 1.0-3.0 M     SEA TEMPERATURE    : 23 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH NORTH TO NORTHEASTERLY WINDS,
     OCCASIONALLY STRONG OFFSHORE. 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 10:05 HKT on 15 Apr 18

    VHHK SIGMET 1 VALID 150205/150605 VHHH- VHHK HONG KONG FIR EMBD TS FCST N OF N1930 AND W OF E11430 TOP FL450 MOV E 20KT NC= VHHK SIGMET 3 VALID 142330/150330 VHHH- VHHK HONG KONG FIR EMBD TS FCST N OF N1930 AND W OF E11300 TOP FL450 MOV E 20KT 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 15/Apr/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     29.9 C
Minimum Air Temperature                     25.2 C
Grass Minimum Temperature                   23.7 C
Relative Humidity                        67 - 86 Percent
Rainfall                                      Trace 
Total rainfall since 1st January            89.4 mm
Against an average of                      249.7 mm

Other Stations                Min                  Max
King's Park                  24.3 C               29.6 C
Wong Chuk Hang               23.5 C               28.0 C
Ta Kwu Ling                  22.3 C               30.8 C
Lau Fau Shan                 23.9 C               29.5 C
Tai Po                       23.9 C               30.8 C
Sha Tin                      23.3 C               30.0 C
Tuen Mun                     24.0 C               28.5 C
Tseung Kwan O                22.6 C               29.3 C
Sai Kung                     23.6 C               26.5 C
Cheung Chau                  23.5 C               29.0 C
Chek Lap Kok                 23.5 C               30.4 C
Tsing Yi                     24.1 C               29.9 C
Shek Kong                    24.1 C               31.0 C
Tsuen Wan Ho Koon            23.4 C               27.9 C
Tsuen Wan Shing Mun Valley   23.9 C               29.1 C
Hong Kong Park               24.6 C               28.0 C
Shau Kei Wan                 23.2 C               28.0 C
Kowloon City                 24.4 C               29.9 C
Happy Valley                 24.9 C               29.8 C
Wong Tai Sin                 24.5 C               29.6 C
Stanley                      23.6 C               28.6 C
Kwun Tong                    24.1 C               29.9 C
Sham Shui Po                 24.3 C               29.9 C
Kai Tak Runway Park          23.9 C               29.2 C
Yuen Long Park               23.8 C               30.2 C
Tai Mei Tuk               23.4 C               30.8 C

Duration of sunshine (King's Park):              2.0 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 5.
Sea surface temperature (Waglan Island):        23.9 C 

Yesterday's (14 Apr 2018) average ambient gamma radiation
dose rate taken outdoors in Hong Kong ranged from 0.08 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                           0.08
Tap Mun                             0.09
Kat O                               0.10
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                         0.15
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 in the
past, the hourly mean ambient gamma radiation dose rate may
vary between 0.06 and 0.3 microsievert per hour. (1
microsievert = 0.000001 sievert = 0.001 millisievert)

    2. Temporal variations are generally caused by changes in
meteorological conditions such as rainfall, wind and
barometric pressure.

    3. Spatial variations are generally caused by differences in
the radioactive content of local rock and soil.

    4. The data displayed is provisional. Only limited data
validation has been carried out.
    Climatological Information for 14 Apr
     2003copy right image | Important notices | Privacy policy Last revision date: <15 Apr 2018> 

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