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Bulletin issued at 17:02 HKT 21/Feb/2018

At 5 p.m. at the Hong Kong Observatory the air temperature was 18 degrees Celsius and the relative humidity 87 per cent.
During the past hour the mean UV Index recorded at King's Park was 0.4. The intensity of UV radiation was low.

The air temperatures at other places were:

King's Park 17 degrees;
Wong Chuk Hang 18 degrees;
Ta Kwu Ling 17 degrees;
Lau Fau Shan 18 degrees;
Tai Po 17 degrees;
Sha Tin 17 degrees;
Tuen Mun 18 degrees;
Tseung Kwan O 17 degrees;
Sai Kung 17 degrees;
Cheung Chau 17 degrees;
Chek Lap Kok 19 degrees;
Tsing Yi 18 degrees;
Shek Kong 19 degrees;
Tsuen Wan Ho Koon 18 degrees;
Tsuen Wan Shing Mun Valley 18 degrees;
Hong Kong Park 17 degrees;
Shau Kei Wan 17 degrees;
Kowloon City 17 degrees;
Happy Valley 18 degrees;
Wong Tai Sin 17 degrees;
Stanley 17 degrees;
Kwun Tong 17 degrees;
Sham Shui Po 18 degrees;
Kai Tak Runway Park 17 degrees;
Yuen Long Park 19 degrees;
Tai Mei Tuk 17 degrees.


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


Climatological Information for 21 Feb

Regional Weather in Hong Kong

Information on Tropical Cyclones

Hong Kong Climatology


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Bulletin updated at 16:45 HKT 21/Feb/2018

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

An easterly airstream is bringing cooler weather to the coastal areas of Guangdong. Besides, the cold front over southern China is expected to reach the coastal areas during the day tomorrow.

Weather forecast for tonight and tomorrow

Cloudy with a few rain patches. Temperatures will linger around 18 degrees at first. Moderate to fresh easterly winds, becoming northerlies tomorrow and temperatures will drop significantly. Temperatures in the urban areas will fall to around 14 degrees tomorrow night, and a couple of degrees lower in the New Territories.

Outlook : Rather cool on Friday morning. Weather will improve gradually in the following couple of days.


(The above forecast period is valid up to 23:59 HKT tomorrow, 22/02/2018; 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 21/Feb/2018

GALE WARNING AREAS: TAIWAN STRAIT, BASHI AND BALINTANG.

GENERAL SITUATION AT 202100 UTC:
AN EASTERLY AIRSTREAM IS AFFECTING THE FORECAST AREAS. TROUGH 24N 105E 23N 112E 26N 119E QSTNR.

MARINE FORECAST FOR 24 HOURS FROM 210100 UTC:

HONG KONG= E 4-5, UP TO 6 LATER. LGT RAIN PATCHES. DOWN TO 2000 M IN MIST PATCHES AT FIRST. SEA UP TO 2 M, UP TO 3 M LATER. TEMP 21-17 C. =
KWANGTUNG= E TO NE 5-6, UP TO 7 IN E LATER. DOWN TO 500 M IN FOG OR RAIN PATCHES IN W AT FIRST. SEA 2-3 M, UP TO 4 M LATER. =
TAIWAN STRAIT= NE 6-7, UP TO 8 LATER. DOWN TO 4000 M IN MIST OR RAIN PATCHES. SEA 3-4 M, UP TO 6 M LATER. SWELL NE UP TO 2 M LATER. =
BASHI= E 6-7, NE UP TO 8 LATER. RAIN PATCHES. SEA 3-4 M, UP TO 6 M LATER. =
PRATAS= E 5-6, OCNL 7. RAIN PATCHES. SEA UP TO 4 M. =
BALINTANG= E 6-7, NE UP TO 8 LATER. RAIN PATCHES. SEA 3-4 M, UP TO 6 M LATER. =
SCARBOROUGH= NE 4-5, OCNL 6. FINE. SEA UP TO 3 M. =
PARACEL= E 4-5. DOWN TO 500 M IN FOG OR RAIN PATCHES IN N. SEA UP TO 2 M. =
TONKIN= E 4, NE 5-6 LATER. DOWN TO 500 M IN FOG OR RAIN PATCHES AT FIRST. SEA 2-3 M LATER. =
DANANG= E 4, OCNL 5. DOWN TO 500 M IN FOG OR RAIN PATCHES 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 16:30 HKT 21/Feb/2018

    Weather information for south China coastal waters issued by the Hong Kong Observatory at 4:30 p.m. on 21 February 2018

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

    Weather Situation:
    An easterly airstream is affecting the south China coastal waters. Besides, a cold front over southern China is expected to reach the coastal waters during the day tomorrow.

    Area forecasts for the next 24 hours

    Hong Kong Adjacent Waters:
    East to northeast force 5 to 6.
    A few rain patches.
    Moderate to rough seas.

    Nan'ao:
    East to northeast force 6 to 7, occasionally force 8.
    Rough to very rough seas.

    Shanwei and South of Hong Kong:
    East to northeast force 6 to 7.
    Rough seas.

    Shangchuan Dao:
    East force 5 to 6.
    Moderate to rough seas.

    Outlook for the next 48 hours
    Northeasterly winds of force 6 to 7.

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

    Waglan Island Wind east-northeast force 5
      Visibility 8 Kilometres

    Shantou Wind east force 2
      Visibility 12 Kilometres

    Dongsha Wind northeast force 4
      Visibility 10 Kilometres

    Huangmaozhou Wind east force 7

    Macau Wind east force 2
      Visibility 8 Kilometres

    Xisha Wind northeast force 2
      Visibility 21 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 17:30 HKT 21/FEB/2018
    (Next update at 01:30 HKT 22/FEB/2018)
    I.   SIGNIFICANT WEATHER WITHIN 100 KILOMETER RADIUS OF H.K :
     STRONG WINDS AND SEV TURB OFFSHORE.
II.  SYNOPSIS OF THE WEATHER SITUATION :
     AN EASTERLY AIRSTREAM IS AFFECTING THE SOUTH
     CHINA COASTAL AREAS.  BESIDES, A COLD FRONT OVER
     SOUTHERN CHINA IS EXPECTED TO REACH THE COASTAL
     AREAS DURING THE DAY TOMORROW.
III. FORECAST FOR 100-KILOMETER RADIUS AROUND HONG KONG
     FROM 1800 TO 0400 HKT:
             WIND                           TEMPERATURE (DEG. C)
   A.   SURFACE:  080/10-15
       OFFSHORE:  080/15-20, OCNL 25                   19-14
   B.   2000 FT:  100/15, OCNL 20                      15-12
   C.   5000 FT:  180/10                               13
   D.  10000 FT:  260/25                               6
   E.  18000 FT:  260/45                               MS7
   F.  24000 FT:  260/55                               MS20
   G.  30000 FT:  260/75                               MS32
   H. INVERSION LEVEL(S) (ONLY WHEN BELOW 5000 FEET) : 
      1200 - 2100 FT.
   I. WEATHER       : 
      CLOUDY WITH A FEW RAIN AND MIST PATCHES.
   J. CLOUD (HEIGHT ABOVE MSL) : 
      FEW 1000 FT  SCT 2500 FT  BKN 8000 FT.
   K. VISIBILITY    : 7 KM.  TEMPO 2000 M IN RAIN/MIST.
   L. 0 DEG. C LEVEL: 15000 FT      10 DEG. C LEVEL(S) : 7800 FT
   M. TURBULENCE    : MOD TO SEV OFFSHORE AND NEAR HILLS.
   N. SEA STATE     : 2.0-3.0 M     SEA TEMPERATURE    : 17 DEG
IV.  FURTHER OUTLOOK: 
     MODERATE TO FRESH EASTERLY WINDS, BECOMING
     MODERATE TO FRESH NORTHERLY WINDS.  CLOUDY WITH
     A FEW RAIN AND MIST PATCHES.=

    ===================================================================
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 10:30 HKT on 10 Feb 18

    VHHK SIGMET 1 VALID 100230/100630 VHHH- VHHK HONG KONG FIR SEV TURB OBS WI N2000 E11636 - N1742 E11448 - N2000 E11448 - N2000 E11636 FL300/400 MOV E 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 21/Feb/2018 
    HKO Readings & Radiation Level

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

Hong Kong Observatory
Maximum Air Temperature                     25.0 C
Minimum Air Temperature                     18.8 C
Grass Minimum Temperature                   18.0 C
Relative Humidity                        75 - 92 Percent
Rainfall                                      Trace 
Total rainfall since 1st January            62.2 mm
Against an average of                       64.3 mm

Other Stations                Min                  Max
King's Park                  18.2 C               26.3 C
Wong Chuk Hang               18.1 C               24.5 C
Ta Kwu Ling                  17.1 C               27.7 C
Lau Fau Shan                 18.4 C               23.2 C
Tai Po                       17.9 C               24.4 C
Tuen Mun                     19.5 C               26.5 C
Tseung Kwan O                17.4 C               24.8 C
Sai Kung                     17.7 C               22.7 C
Cheung Chau                  18.4 C               23.1 C
Chek Lap Kok                 19.3 C               25.4 C
Tsing Yi                     19.0 C               25.3 C
Shek Kong                    18.3 C               27.1 C
Tsuen Wan Ho Koon            18.3 C               24.8 C
Tsuen Wan Shing Mun Valley   18.3 C               26.6 C
Hong Kong Park               18.7 C               24.2 C
Shau Kei Wan                 17.1 C               24.2 C
Kowloon City                 18.6 C               25.9 C
Happy Valley                 18.4 C               26.0 C
Wong Tai Sin                 19.1 C               26.5 C
Stanley                      17.5 C               22.3 C
Kwun Tong                    18.1 C               25.6 C
Sham Shui Po                 19.6 C               25.1 C
Kai Tak Runway Park          17.8 C               21.4 C
Yuen Long Park               19.0 C               26.8 C
Tai Mei Tuk               17.9 C               26.7 C

Duration of sunshine (King's Park):              1.5 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 6.
Sea surface temperature (Waglan Island):        17.1 C 

Yesterday's (20 Feb 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                               0.11
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                        0.15

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 20 Feb
     2003copy right image | Important notices | Privacy policy Last revision date: <21 Feb 2018> 

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